INSTITUTION OF GAS ENGINEERS AND MANAGERS

Transcription

1 INSTITUTION OF GAS ENGINEERS AND MANAGERS IGEM/UP AND IGE/UP SERIES OF STANDARDS AMENDMENTS FEBRUARY 2017 (45 sides) Amendments apply to the following Standards: IGE/UP/1 Edition 2. Communication 1683 Strength testing, tightness testing and direct purging of industrial and commercial gas installations Amendments March 2005 (6 sides) IGE/UP/1A Edition 2. Communication 1701 Strength testing, tightness testing and direct purging of small, low pressure industrial and commercial gas installations Amendments March 2005 (6 sides) IGEM/UP/1B Edition 3. Communication 1759 Tightness testing and direct purging of small Liquefied Petroleum Gas/Air, Natural Gas and Liquefied Petroleum Gas installations. Amendments October 2012 (1 side) IGEM/UP/2 Edition 3. Communication 1771 Installation pipework on industrial and commercial premises There are no amendments IGE/UP/7 Edition 2. Communication 1722 Gas installations in timber framed and light steel framed buildings Amendments October 2008 (1 side) IGEM/UP/10 Edition 4 Communication 1774 Installation of flued gas appliances in industrial and commercial premises Amendments March 2016 (16 sides) and amendments February 2017 (11 sides) IGE/UP/12. Communication 1713 Application of burners and controls to gas fired process plant Amendments May 2009 (1 side) IGEM/UP/16. Communication 1756 Design for Natural Gas installations on industrial and commercial premises with respect to hazardous area classification and preparation of risk assessments Amendments August 2013 (1 side) IGEM/UP/19. Communication 1773 Design and application of interlock devices and associated systems used with gas appliance installations in commercial catering establishments Amendments January 2015 (2 sides) If the user copies these amendments onto A4 labels, the Amendments can be cut out and applied to the appropriate places within the relevant Standards i.e. the individual Amendments are tailored to fit over the existing text. IGEM has a policy with respect to changes in prescribed practices. Unless deemed essential, IGEM does not issue new editions of publications within 5 years of the existing edition and the primary consideration for this is to keep the costs to the gas industry as low as reasonably possible. However, IGEM also has a policy to advise industry of recommended changes in prescribed practices as quickly as possible. This means that from time to time, free amendments are made available but the user has to take the time to insert them into their Standards. It is recognised that the changes enclosed to UP/1 Edition 2 and UP/1A Edition 2 are substantial and may take a while to apply to the Standards. However, these changes (which in general are not caused by errors in the original documents) (and other enhancements that are proposed but can be held for the next edition) would, normally, warrant new editions but this has not been done as the existing publications were less than 5 years since original publication when the Amendments were issued.

2 IGE/UP/1 EDITION 2 COMMUNICATION The following Amendments (March 2005) apply to all copies of IGE/UP/1 Edition 2 published in 2003 and supersede the Amendment of August It is not necessary to apply these to IGE/UP/1 Edition 2 Reprint with Amendments (Communication 1716) which already includes them. Figure 2. Delete flow diagram entirely retaining the italicised key and title. Substitute: START NG? NO LPG? YES NO IGE/UP/1 Ed 2 YES YES 28 mm AND V 0.02m 3? NO IGE/UP/1 Ed 2 YES LPGA TM- 62 DOMESTIC AND OP 21 mbar AND 28 mm AND SUPPLY MOP 2 bar AND U6/G4/E6 METER? NO OP AND MOP 40 mbar AND SUPPLY MOP 75 mbar AND V 1 m 3 AND 150 mm NO IGE/UP/1 Ed 2 YES YES IGE/UP/1B IGE/UP/1A Ed 2 Sub- Add a further Note after Note 2: Section 2.2 Note 3: See Sub-Section 2.7 regarding the principles adopted for the detection of leakage. Section 2 Add: 2.7 IGE/UP/1 Edition 2 adopts the concept of gauge readable movement (GRM). When using a water gauge, it may be possible to reduce the duration of tests for new installations and extensions by adopting the concept of no perceptible movement. This will lower test times in many cases but has to be subject to a thorough analysis, by the responsible person, of the complex fluid mechanics and mathematics involved. Section 3 Add: 3.4 In the following situations, electronic equipment shall be certified for use in a hazardous area: when seeking the source of a known or suspected gas leak, using a gas detector when a hazardous area is imposed by another installation, for example an oil supply, and the equipment is to be used within that area when a risk assessment indicates that use of uncertified equipment is not acceptable (see below) UP/1/1

3 when it is anticipated that the area in which the equipment will be located will be left unattended at any time during the test/purge. The decision on whether electronic equipment, for example pressure gauges and gas detectors, can be of a type not certified for use in a hazardous area, may be complex and is not an issue that can be developed in IGE/UP/1. However, unless the pipework being tested or purged is known to contain only air and/or inert gases (in which case equipment that is not certified may be used) any use of such uncertified equipment shall be subject to a suitable risk assessment prior to use. Equipment manufacturers instructions may assist in this risk assessment. Note 1: For lower pressures, water gauges can always be used if there is any doubt about the use of uncertified gauges. Note 2: For MOP 75 mbar, use of uncertified gauges placed in the open air and located at least 150 mm from any potential gas source (a greater clearance may be required) may be acceptable although it is still possible for a hazardous area to apply, particularly as imposed by another installation. Note 3: Further guidance on hazardous area classification is available in IGE/GM/7 Edition 2 and IGE/G/3 (publication anticipated in 2005) and is contained in BS EN Page 10 Delete entirely. Substitute attached new page 10 (UP/1/3). Delete clause and associated note entirely. Substitute: A strength test shall be carried out on any new installation or extension except for components that have been pre-tested or have been removed to avoid over pressurisation, for example appliances. Note: Where a component or sub-assembly (meter installation component, meter skid unit, etc.) has been pre-tested and not subsequently modified and has appropriate certificates of conformity available, the strength testing of such a component/assembly need not be undertaken but a visual examination of joints, general condition, suitability, etc. is recommended prior to installing and subsequent tightness testing as for a new installation (see Sub-Section 4.4). Permanent marking, for example by manufacturer s badging/stamping, may be deemed as certification of conformity. Table 1. Delete entirely retaining the italicized text and title. Substitute: MOP Ø (mm) TEST METHOD STP (greater of) STABILIZE (mins) STD (mins) Maximum drop % STP ALL METALLIC PIPEWORK Pneu. Hydro. 100 mbar ALL Pneumatic or 1.1 MIP and hydrostatic * MOP *3 >100 mbar ALL Pneumatic or 1.1 MIP and 1 bar hydrostatic* MOP *3 >1 bar ALL Pneumatic or 1.1 MIP and bar hydrostatic 1.5 MOP >2 bar 25 Pneumatic or 1.1 MIP and bar hydrostatic* MOP *3 >2 bar >25 Pneumatic or 1.1 MIP and bar 150 hydrostatic* MOP *3 >2 bar >150 Hydrostatic* MIP and N/A 5 7 bar 1.5 MOP >7 bar >25 Hydrostatic* MIP and N/A 5 16 bar 1.5 MOP PE PIPEWORK 100 mbar ALL Pneumatic or 1.1 MIP and hydrostatic* MOP *3 >100 mbar ALL Pneumatic or 1.1 MIP and 200 mbar hydrostatic* MOP *3 >200 mbar Pneumatic or 1.1 MIP and bar* 4 hydrostatic* MOP *3 >1 bar ALL Pneumatic or 1.1 MIP and bar* 4 hydrostatic* 1 MOP and 3 bar *3 >3 bar ALL Hydrostatic* MIP and N/A 5 6 bar* 4 MOP and 6 bar >6 bar ALL Hydrostatic* MIP and N/A 5 7 bar* 4 MOP and 7 bar >7 bar ALL Hydrostatic* MIP and N/A 5 10 bar* MOP UP/1/2

4 IGE/UP/1 Edition 2. Amended Jan 2005 SECTION 4 : STRENGTH TESTING New pipework, designed in accordance with current relevant standards, will have been designed to withstand the strength test pressure (STP). However, particular components within the pipework may need to be removed for the strength test (see Sub-Section 4.4). In addition, appliances may not be designed to withstand STP. Strength testing is used to identify any major flaw in the construction of a new installation, prior to tightness testing. A strength test permits a fall in pressure limited to the value given in Table 1. It is possible to combine the strength and tightness tests. This may save a little time by not requiring a stabilization period for the tightness test. It can only be achieved if the strength test is a pneumatic test (but see Note 1 to Table 1). Appendix 3 provides guidance which should be followed if it is decided to combine the strength and tightness tests. The procedures outlined in Sections 4 and 5 assume a separate test for each and the principles equally apply for a combined test. Some LDFs have an adverse effect on certain pipework materials. Consequently, any residual fluid shall be washed thoroughly off the pipe and subsequently dried. If necessary, for example when joints are broken, temporary electrical continuity bonds shall be installed before testing. Acronyms ECV = emergency control valve NDT = non-destructive testing IV = installation volume OP = operating pressure GT = gas transporter PE = polyethylene LDF = leak detection fluid PRI = pressure regulating installation MAM = meter asset manager SSOV = safety shut-off valve MIP = maximum incidental pressure STP = strength test pressure MOP = maximum operating pressure STD = strength test duration. 4.1 DETERMINATION OF MOP AND MIP Strength test pressure (STP) is determined using either a multiple of MOP or MIP or, for PE at higher pressures, a fixed pressure, all as given in Table 1. The following assumes that strength testing is applied to new installation pipework or new extensions only. If an existing installation is to be strength tested (see clause 4.2.2), it may be more difficult to obtain the detail of MIP and MOP for installations not previously tested as new to this edition of IGE/UP/1. These Procedures assume that MOP equates to Design Pressure (DP). Where DP is quoted and is in excess of MOP, then the value of DP shall be used in the calculation of STP Normally, the values of MIP and MOP shall be obtained from the designer of the installation pipework or, for a meter installation, from the MAM. For pipework installed between the ECV and the nearest downstream regulator, the values shall be obtained from the GT. Note: While MOP will often equate to OP, the designer may have chosen to declare MOP at a higher value, in which case the calculation of STP has to take this higher value into account Where a booster or compressor is included anywhere downstream of, or within, the installation pipework being tested, the maximum back pressure shall be obtained from its owner. Where this pressure exceeds MIP, this back pressure shall be taken as MIP. 10 UP/1/3 IGEM, Charnwood Wing, Holywell Park, Ashby Road, Loughborough, Leicester, LE11 3GH Website:

5 2 nd paragraph. Delete entirely. Substitute: STP and MOP shall be recorded clearly and be available for reference by any party subsequently working on the installation. Delete 2 nd bullet. Substitute: for PE, the lower of 350 mbar and STP. 2 nd paragraph. Delete entirely. Substitute: STP and MOP shall be recorded clearly and be available for reference by any party subsequently working on the installation. Figure 4 Delete top three right hand boxes. Substitute: NO EXISTING. IS IT NECESSARY TO CARRY OUT A STRENGTH TEST? ( ) NO GO TO TIGHTNESS TEST (5) YES YES IS IT SAFE TO STRENGTH TEST? ( ) NO RE-ASSESS CONSTRUCTION AND TEST METHOD. ELIMINATE UNACCEPTABLE RISK OR ELIMINATE NEED TO STRENGTH TEST. RETURN TO START. Section 5 Add new 6th paragraph: If necessary, for example when joints are broken, temporary continuity bonds shall be installed before testing. Delete entirely. Substitute: Where it is not necessary to test a component of the meter installation, such a component shall be isolated at the meter installation outlet valve/meter outlet valve (MIOV/MOV), as appropriate. 2 nd line of calculation. Delete entirely. Substitute: 5.2.2(d) = (12 x ) + (10 x ) + (IV pa + IV pb ) (0.1) 5 th bullet and Note. Delete entirely. Substitute: ensure that, where necessary, any electronic gauge is certified for use in a hazardous area (see Sub-Section 3.4) and operated within the manufacturer s specification with regard to ambient temperature Retain title. Delete text entirely. Substitute: Where a pipework section passes through more than one of the Area types A, B or C/D shown in Table 8, the minimum value of MPLR shall apply for the whole section. If it can be proved that, for Area type A, there is no leak (see clause ) the next lowest value of MPLR may be applied but the volume of pipework in the Area type A has to be included in the calculations unless it can be isolated. UP/1/4

6 (c) 1 st sentence up to colon. Delete entirely. Substitute: Where TTD is less than the maximum for the gauge given in Table 6: (d) (d) 1 st sentence up to colon. Delete entirely. Substitute: Where TTD is greater than the maximum for the gauge given in Table 6: Delete text entirely, including Note. Substitute: Where TTD is less than the maximum for the gauge given in Table 6, the gauge shall be monitored as necessary for the duration of the test (e) (e) Delete first sentence entirely. Delete final sentence. Retain the note. Substitute: If LR exceeds MPLR, the test has failed and the leak(s) shall be traced, isolated and repaired, and the test repeated. 1 st sentence up to colon. Delete entirely. Substitute: (f) Where TTD is greater than the maximum for the gauge given in Table 6: (f) Delete final sentence. Substitute: If LR exceeds MPLR, the test has failed and the leak(s) shall be traced, isolated and repaired, and the test repeated. Delete text entirely. Substitute: After existing pipework has been returned to service, joints in any inadequately ventilated area (Area type A (see clause )) shall, if practicable, be checked with a suitable intrinsically safe gas detector, when the reading should not move from 0% LFL on the 0-10% LFL scale. Delete text and Note entirely. Substitute A let by test shall be carried out on the appliance isolation valve (see clause (a). Thereafter, a tightness test shall be undertaken on the appliance connector. For pipework volumes not exceeding 0.12 m 3, there shall be no perceptible movement of the gauge over a period of 2 minutes at a pressure of not less than OP. For pipework volumes exceeding 0.12 m 3, the volume of the pipework shall be calculated and a tightness test carried out in accordance with clause Final paragraph. Delete entirely. Retain Note. Substitute: In order to prevent lock-up, the regulator should be by-passed, using tubing of suitable material and bore, fitted across the regulator (or it may be possible to put the regulator out of action by screwing down to its maximum setting in which case the isolation valve should be opened slowly to prevent regulator lock-up). UP/1/5

7 Add a Note 2: Note 2: For a meter regulator, the adjustment of the regulator may only be undertaken by a GT authorised person. 2 nd paragraph. 1 st sentence. Delete entirely. Substitute: If it becomes immediately apparent that a direct purge will not achieve the required flow rate, the restriction may be removed and the purge re-started. Otherwise, an indirect purge using N 2 shall be carried out (see Appendix 8). Sub- 1 st bullet. Delete entirely. Substitute: Section 6.7 comply with Sub-Section 3.4 Page st line. Delete first 6 lines entirely. Substitute: PV of a diaphragm meter = 5 cyclic volume (Table 3) Note: The cyclic volume (capacity per revolution) is shown either on the index plate of modern meters or, on older tin case meters, on the badge plate. PV of a rotary, turbine or ultrasonic meter (d) (g) Delete text entirely. Retain Note. Substitute: Open all purge points and valves on connected vent stacks and admit air. Simultaneously, start the chosen method of measuring the flow of air (see clause 6.5.1) i.e. start a timer and read the in-line meter, or read the flow meter rate. Add a further sentence: Seal or disconnect pipework from the gas supply, sealing all ends with an appropriate fitting. A2.3 Delete 3 rd bullet entirely. Substitute: BS EN Flame arresters. A4.2 Example at bottom of page 60. Last line. Delete entirely. Substitute: = m 3 h -1 (st) air at OP. A7.3.2 Table 21 Example on page nd paragraph. Delete entirely. Substitute: Creep will be much less at 1.5 bar but, to be conservative, test with a GRM of 20 mbar. TTD = GRM x IV x F1 (Table 9) TTD = x 20 x 0.5 x 42 = 20 mins. If a leak is indicated, repeat the test immediately to check whether it may be creep (unless the observed gauge movement is clearly too large to be due to creep). Centre main column. Delete PE 100 SDR 11. Substitute: PE 80 SDR 11 A8.3 2 nd paragraph. Delete entirely. Substitute: Ensure a minimum volume of nitrogen equal to 1.5 times the installation volume of the pipework is available (see Table 24 and Sub-Section 5.2). Table 24 In column title, amend QUALITY to: QUANTITY A8 Add at end of Appendix: A8.9 Once the purge to nitrogen is complete, it is advisable to then purge to air and ensure the oxygen level is at least 20%. END OF UP/1 EDITION 2 AMENDMENTS UP/1/6

8 IGE/UP/1A EDITION 2 COMMUNICATION The following Amendments (March 2005) apply to all copies of IGE/UP/1A Edition 2 published in It is not necessary to apply these to IGE/UP/1A Edition 2 Reprint with Amendments (Communication 1717) which already includes them. Contents Appendix. Add new row at end: 4 Tightness test durations for a water gauge using the concept of no perceptible movement (for new installations only) 49 Figure 2 Delete flow diagram and italicized key entirely. Retain the Note and Title. Substitute: START NG? YES NO LPG? YES 28 mm AND V 0.02m 3? NO NO IGE/UP/1 Ed 2 IGE/UP/1 Ed 2 YES LPGA TM-62 DOMESTIC AND OP 21 mbar AND 28 mm AND SUPPLY MOP 2 bar AND U6/G4/E6 METER? NO OP AND MOP 40 mbar AND SUPPLY MOP 75 mbar AND V 1 m 3 AND 150 mm NO IGE/UP/1 Ed 2 YES YES IGE/UP/1B IGE/UP/1A Ed 2 is less than or equal to Ø is nominal diameter V is volume. Sub- 1 st paragraph. Add a 2 nd sentence after Note 2: Section 2.1 See additional text in 2.1(A) at base of page. 2.1(A) Add at base of page: However, any new pipework between the ECV and the inlet of the first regulator downstream of the ECV is excluded from the scope unless it has been pre-tested for strength and tightness prior to assembly. Sub- Add a further Note: Section 2.2 Note 4: See Sub-Section 2.7 regarding the principles adopted for the detection of leakage. UP/1A/1

9 Section 2 Add: 2.7. IGE/UP/1A Edition 2 adopts the concept of gauge readable movement (GRM). When using a water gauge, it may be possible to reduce the duration of tests for new installations and extensions by adopting the concept of no perceptible movement (see Appendix 4). Sub- Section 4.1 Adjacent to Acronyms, add new paragraph: These Procedures assume that MOP equates to Design Pressure (DP). Where DP is quoted and is in excess of MOP, then the value of DP shall be used in the calculation of STP. Delete clause and associated note in their entirety. Substitute: A strength test shall be carried out on any new installation or extension except for components that have been pre-tested or have been removed to avoid over pressurisation, for example appliances. Note: Where a component or sub-assembly (meter installation component, meter skid unit, etc.) has been pre-tested and not subsequently modified and has appropriate certificates of conformity available, the strength testing of such a component/assembly need not be undertaken but a visual examination of joints, general condition, suitability, etc. is recommended prior to installing and subsequent tightness testing as for a new installation (see Sub-Section 4.4). Permanent marking, for example by manufacturer s badging/stamping, may be deemed as certification of conformity. 2 nd sentence. Delete MOP. Substitute: STP and MOP Figure 4 3 rd arrow down of 2 nd column of boxes. Delete No. Delete entirely. Substitute: Where it is not necessary to test any component of the meter installation, such a component shall be isolated at the meter installation outlet valve/meter outlet valve (MIOV/MOV), as appropriate. 2 nd line of calculation. Delete entirely. Substitute: 5.2.2(d) = (12 x ) + (10 x ) + (IV pa + IV PB ) (0.1). Table 4 Table 5 Table (d) Delete right hand column entirely. Delete Note entirely. Delete the Table and its Note entirely. Retain the title. Substitute the following page (UP/1A/3). Add below the table title: IGE/UP/1A Edition 2 adopts the concept of gauge readable movement (GRM). When using a water gauge, it is possible to reduce the duration of tests for new installations and extensions by adopting the concept of no perceptible movement in which case Appendix 4 shall be used. Delete entirely. Substitute: Raise the pressure in the section to at least TTP. Isolate the air supply (f) Delete text entirely. Substitute: Adjust to TTP. UP/1A/2

10 IV (m 3 ) VOLUME OF SMALLEST OCCUPIED SPACE (RV) (m 3 ) > > > > > > > > > > > > > > > > > Note 1: For RV between two stated values, assume the lower value e.g. for RV = 42 m 3, use 40 m 3. Maximum allowable pressure drop (mbar) Note 2: For a water gauge, where appropriate, round the maximum allowable pressure drop downwards to the next lower 0.5 mbar e.g. for 1.3 mbar, use 1.0 mbar, for 1.8 mbar, use 1.5 mbar. UP/1A/3

11 5.7.4(a) 5.7.4(c) Delete entirely. Substitute: Where practical, turn off all appliances and close any appliance isolation valve. Close any upstream section isolation valve to prevent air entering the upstream pipework. Delete entirely. Substitute: Carry out a let-by test of the isolation valve. Adjust the pressure to approximately 50% OP by slowly opening the isolation valve and turn off the gas supply by closing the isolation valve. If, over the test period as given in Table 8, a perceptible rise in pressure is observed, the isolation valve may be letting-by. Any defective isolation valve shall be repaired/replaced before proceeding to the tightness test. If let-by is confirmed on an ECV, the National Gas Emergency Service Call Centre shall be notified and the installation made safe, suspending the test until a repair has been made (d) Delete entirely. Retain Note. Substitute: Admit gas or air, as appropriate, and adjust the pressure in the section to at least TTP (f) Delete entirely. Substitute: Adjust the pressure to TTP and observe the gauge for the tightness test duration (TTD). If using air (see (d) above), isolate the source of the air supply (h) Delete 3rd paragraph. Substitute: If a discernible pressure drop is recorded, or there is a smell of gas, any individual appliance isolation valve that has been left open shall be closed and the test repeated until the leak is located (see below). Delete entirely. Substitute A let-by test shall be carried out on the appliance isolation valve (see clause 5.7.4(c). Thereafter, a tightness test shall be undertaken on the appliance connector. For pipework volumes not exceeding 0.12 m 3, there shall be no perceptible movement of the gauge over a period of 2 minutes at a pressure of not less than OP. For pipework volumes exceeding 0.12 m 3, the volume of the pipework shall be calculated and a tightness test carried out in accordance with clause Final paragraph. Delete entirely. Retain Note. Substitute: In order to prevent lock-up, the regulator should be by-passed, using tubing of suitable material and bore, fitted across the regulator (or it may be possible to put the regulator out of action by screwing down to its maximum setting in which case the isolation valve should be opened slowly to prevent regulator lock-up). Add a Note 2: Note 2: For a meter regulator, the adjustment of the regulator may only be undertaken by a GTauthorised person. UP/1A/4

12 2 nd paragraph. 1 st sentence. Delete entirely. Substitute: If it becomes immediately apparent that a direct purge will not achieve the required flow rate, the restriction may be removed and the purge re-started. Otherwise, an indirect purge via N 2 shall be carried out (see Appendix 3) (a) (g) Amend 5.7.2(c) to: 5.7.4(c)). Add two further sentences: Seal or disconnect pipework from the gas supply, sealing all ends with an appropriate fitting. Decommission in accordance with these Procedures. Appendix 3 Add new Sub-Appendix: A3.10 Once the purge to Nitrogen is complete, it is advisable to then purge to air and ensure the oxygen level is at least 20%. Appendix 4 Add to the inside of the back cover a new Appendix 4 (following page) (UP/1A/6). UP/1A/5

13 APPENDIX 4 : TIGHTNESS TEST DURATIONS FOR A WATER GAUGE USING THE CONCEPT OF NO PERCEPTIBLE MOVEMENT (FOR NEW INSTALLATIONS ONLY) For clarity, IGE/UP/1A Edition 2 adopts the concept of gauge readable movement (GRM). This is because the meaning of no perceptible movement is open to differing interpretation with respect to electronic gauges, which are seeing increased usage. However, in the case of a water gauge, the use of no perceptible movement is an established and understood concept. When testing a new installation, using this concept for a water gauge has the benefit of significantly reducing the test times from those given in Table 6 which are based on GRM. The table below gives the equivalent values for no perceptible movement. Any movement of the gauge during the test time indicates the installation has failed the tightness test. IV (m 3 ) TIGHTNESS TEST DURATION NPM (0.25 mbar) (water gauges) Up to > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > TIGHTNESS TEST DURATION (TTD) FOR NEW INSTALLATIONS AND EXTENSIONS USING NO PERCEPTIBLE MOVEMENT END OF UP/1A EDITION 2 AMENDMENTS UP/1A/6

14 IGEM/UP/1B Edition 3 COMMUNICATION The following Amendments (October 2012) apply to all copies of IGEM/UP/1B Edition 3, published in Note. 2 nd Sentence. Delete entirely. Table 4 Note 4. 2 nd and 3 rd paragraphs. Delete entirely. Substitute: For Butane installations with an OP of 28 mbar, if whilst raising the pressure to the test pressure it were to exceed 21 mbar but not exceed 23 mbar re-adjust the pressure to between 20 and 21 mbar. If the pressure were to exceed 23 mbar it is necessary to drop the pressure back to between 7 and 10 mbar before re-raising the pressure to between 20 and 21 mbar. This helps to ensure that the regulator in not locked-up during the tightness test. For Butane/Propane installations with an OP of 30 mbar, if whilst raising the pressure to the test pressure it were to exceed 29 mbar but not exceed 31 mbar re-adjust the pressure to between 28 and 29 mbar. If the pressure were to exceed 31 mbar it is necessary to drop the pressure back to between 7 and 10 mbar before re-raising the pressure to between 28 and 29 mbar. This helps to ensure that the regulator in not locked-up during the tightness test. Appendix 4.3 (e) Note. Delete entirely. Substitute: Note: Avoid higher pressures to prevent regulator lock-up. If whilst raising the pressure to the test pressure it were to exceed 19 mbar but not exceed 21 mbar re-adjust the pressure to between 18 and 19 mbar. If the pressure were to exceed 21 mbar it is necessary to drop the pressure back to between 7 and 10 mbar before raising the pressure to between 18 and 19 mbar. This helps to ensure that the regulator is not locked-up during the tightness test.. UP/1B/1

15 IGE/UP/7 Edition 2 COMMUNICATION The following Amendments (October 2008) apply to all copies of IGE/UP/7 Edition 2 published in st paragraph. Delete IGE/UP/2. Substitute: IGEM/UP/2 Note 3: Delete IGE/UP/2. Substitute: IGEM/UP/2 2 nd paragraph. Delete from pipework to specifications i.e. the end of the Note. Substitute: Pipework shall not be installed between joists at intermediate floor levels unless there is sufficient adventitious ventilation available; ventilation shall be provided in accordance with BS 6891 or IGEM/UP/2 Edition 2, as appropriate. Note: Research has indicated that where gas installation pipework (of diameter not exceeding 35 mm and at OP not exceeding 25 mbar) is installed at intermediate joisted floors in dwellings, there is sufficient adventitious ventilation of the floor construction to safely disperse any minor leakage of gas. Therefore, there is no requirement to install purpose provided ventilation to floors of this construction in timber frame or light steel frame buildings. The results and conclusions of this Report apply to Natural Gas installations only and, therefore, cannot be applied to installations supplied with 3 rd family gases. Section 11 1 st paragraph. 5 th line. Delete BS 6891 or IGE/UP/2, as appropriate. Substitute: A2.3 4 th Bullet. Delete entirely. Substitute: IGEM/UP/2 Gas installation pipework on industrial and Edition 2 commercial premises Outer back cover Delete entry for IGE/UP/2. Substitute: IGEM/UP/2 Gas installation pipework on industrial and Edition 2 commercial premises. END OF UP/7 AMENDMENTS. UP/7/1

16 IGEM/UP/10 Edition 4 COMMUNICATION The following Amendments (March 2016) apply to all copies of IGEM/UP/10 Edition 4 published in Delete Note 4. Substitute: Note 4: The ratio of gross to net heat input is, approximately, 1.11:1, 1.09:1 and 1.08:1 for appliances on Natural Gas (NG)/Towns Gas, propane and butane respectively. For the purposes of this Standard, where gross heat inputs represent requirements of existing standards, they are converted to net using a conversion factor in all cases. For example, 600 kw gross heat input = = 545 kw net heat input for NG. Delete all paragraphs. Substitute: These Regulations impose duties on designers, clients (and their agents), developers, principal designer and principal contractors. Further information is given in L153, which sets out the principles duty holders are required to use in their approach to identifying the measures they need to take to control the risks to health and safety in a particular project. The general principles of prevention are to: avoid risks where possible evaluate those risks that cannot be avoided, and put in place proportionate measures that control them at source. Construction includes the alterations, repair, re-decoration, maintenance, de-commissioning or demolition of a structure. It also covers installation, commissioning, maintenance or removal of gas services Delete text in clause. Substitute: The installer is required to check the safety of any appliance or pipework they install or work on and take appropriate action where they find faults. Where the premises are let or hired out, the landlord or hirer has special responsibilities to ensure that any installer they use for the gas fitting, service or maintenance or safety is a member of an approved class of persons (see clause ) and is competent to carry out such work. If any serious fault is found, the installer is required to inform both the landlord/hirer, as well as the user, so that such faults can be rectified before further use Delete all paragraphs. Substitute: Appliances shall be located on suitable structures that can safely withstand their weight (including any water or thermal fluids) at a temperature specified by the appliance manufacturer. For appliances containing liquids, the selected location shall, as necessary, incorporate means to safely drain and dispose of any liquids that might be released during maintenance, from leaks, due to condensation, from condensate etc. UP/10/1

17 Add Note 4: Note 4: The ventilation requirements in this Standard relate to the safe operation of appliances. Ventilation may also been needed under DSEAR for gas pipework (see IGEM/UP/2 and IGEM/UP/11). In the majority of cases, this is provided by the appliance ventilation, however high level ventilation may always be required Add a Note: Note: For ventilation of school buildings further guidance is provided by Guidance on ventilation, thermal comfort, and indoor air quality in schools DfE, previously Building Bulletin 101. FIGURE 2 Delete entire Figure. Substitute: Louvred door provides 5.6 cm 2 per kw total free area If high level ventilation provided by louvred door is less than 20% of 2 cm 2 per kw total free area (0.4 cm 2 per kw total free area) then additional ventilation would be required (see note overleaf) 85% of height from the floor Low level ventilation within 1 m from floor needs to be 20% of 4 cm 2 /kw (see note overleaf) May need additional ventilation at low level too FIGURE 2 EXAMPLE OF VENTILATION DISTRIBUTION FOR A PLANT ROOM WITH LOUVRED DOORS AND VENTILATION. TABLE 2 Delete Note 3 entirely and substitute: Note 3: Where a boiler installation is occupied for example by boiler operators and is to operate in summer months, for example domestic hot water heating, the above allowance ought to be sufficient, provided that it does not operate for more than 50% of the time. If the boiler installation is to operate at a higher percentage of the time, increased ventilation will be required. For example, at 75%, an additional 720 m 3 per hour per 1000 kw and, at 100%, an additional 1350 m 3 per hour per 1000 kw total heat input will be required for inlet and extract air. UP/10/2

18 7.3.1 Delete 1 st line under Example calculation for fanned ventilation. Substitute: Boiler capacity = 800 kw Delete the clause retaining the Note: Substitute: In a building having an air change rate of less than 0.5 air changes per hour and room volume less than 1500 m 3, ventilation of 2 cm 2 for every kw net heat input at high and low level, or mechanical ventilation (see clause 7.6.3) shall be applied (see Figure 5).. FIGURE 5 Delete the key on the Figure No additional ventilation. Substitute: Additional natural or mechanical ventilation may not always be necessary Delete the clause. Substitute: Low level only ventilation at 2 cm 2 kw -1 is required for any space containing gas appliances and having a natural air change rate exceeding 0.5 air changes per hour (low level ventilation is defined in clause ) Delete the Note. Substitute: Note: For guidance, the added mechanical ventilation would need to be 1.35 m 3 h -1 kw -1 (0.375 m 3 s kw -1 ) net heat input, to equate with a naturally ventilated space as given in clause Delete the clause. Substitute: For any termination or group of terminations with a total net heat input exceeding 333 kw net heat input, the general requirements of this Sub-Section shall apply and approval must be sought from the Local Authority prior to commencement of the installation. Horizontal flue terminations (other than for fan diluted flues, see Sub-Section 8.7.5) are not permitted for any termination or group of terminations with a total net heat input exceeding 135 kw net heat input unless approval by the local Environmental Health Officer (EHO) (see also Appendix 9). Horizontal flue terminations (other than for fan diluted flues, see Sub- Section 8.7.5) are not permitted for any termination or group of terminations with a total net heat input exceeding 333 kw net heat input Add a Note: Note: Appendix 9 provides a risk assessment for the position of horizontal flue terminations. It may be applied as appropriate for vertical flues. UP/10/3

19 FIGURE 6 Delete the Figure. Substitute: * 1 * 1 * 1 * 8 * * * * 6 * * 2 2 * * 2 1 * 8 * 3 * * * * 2 * 7 * 9 * 9 * 9 Key to Diagram: * 1 - Minimum termination height for ridged and flat roofs, see clause and Figures 10A and 10B. * 2 - Minimum horizontal termination distance from openings i.e. doorways, windows, ventilation grilles, etc., see clause and Figure 7. * 3 - Minimum horizontal termination distance from adjacent walls or obstructions, see clause * 4 - Minimum distance to be 200 mm for fan assisted appliances, 300 mm for room sealed natural draught appliances, see BS 5440 and clause * 5 - Minimum distance to be 150 mm, see BS 5440 and clause * 6 - Minimum termination distance from openings i.e. doorways, windows, ventilation grilles, etc., see clause * 7 - Minimum distance of centres of flue terminal, see manufacturer s instructions. * 8 - Minimum distance below terminal or opening 2.5 m, see Figure 7. * 9 - See Sub-section FIGURE 6 EXAMPLE OF TERMINATION POSITIONS UP/10/4

20 FIGURE 8 Delete the Figure. Substitute: Distance A = (net heat input kw) D i s t a n c e Distance A (mm) 600 Natural draught flues Fanned draught flues X m m 400 Distance X A = (net heat input kw) Clean Air Act lower limit 333 kw net heat input Appliance net heat input (kw) Note 1: Note 2: The type of flue does not necessarily reflect the type of connected appliance. The equations on the graph are represented by the appropriate plotted line. FIGURE 8 HEIGHT X OF THE FLUE TERMINAL LOCATED ON A ROOF FOR APPLIANCES UP TO A NET HEAT INPUT OF 333 kw. UP/10/5

21 FIGURE 10A Delete the clause. Substitute: Single or groups of appliances exceeding 333 kw net heat input must terminate above roof level as required by the Clean Air Act.. Delete the clause. Substitute: Where a chimney is used, the chimney height, rounded up to the nearest metre, shall give a termination position at least 3 m above the level of any adjacent area to which there is general access, for example ground level, roof areas or adjacent openable windows. The chimney height shall not be less than the height of any building within a distance of 5 times the uncorrected chimney height (U) for appliances above 70 kw net heat input (see Figure 9) and worked example A Delete the Figure. Substitute: Min 1.5m X X X Min 1.5m X Slope over 20 <1.5m <1.5m Valley Note 1: For dimension X see Figure 8. Note 2: A pitched roof has a slope of greater than 20 о from the horizontal. FIGURE 10A TERMINATIONS FOR RIDGED ROOF CONFIGURATIONS Delete the 1 st paragraph. Substitute: Horizontal terminations shall be located according to the minimum distances given in Figure 7, Figure 12, and subject to the risk assessment criteria given in Appendix 9. Add a clause: The termination shall be guarded if it is less than 2 m above ground level or in any position where it may cause injury to persons resulting from touching hot surfaces. UP/10/6

22 Add 1 st paragraph and Note to a clause and make 2 nd paragraph from clause the 2 nd paragraph of this clause: Any termination of a room sealed appliance shall be in such a position as will not cause a hazard to the health of persons who may be nearby or a nuisance to other persons beyond the curtilage and shall satisfy the Risk assessment in Appendix 9. Note: If practical, discharges at 45 0 to horizontal and above may be used. Add new clause: The terminal shall not be positioned at a height of less than 300 mm from the ground or horizontal surface to avoid being covered by snow or other debris and as high as reasonably practicable This clause becomes Substitute: This clause becomes FIGURE 11A Delete the Figure. Substitute: G F See Sub- 3 Section FIGURE 11A FLUE TERMINALS ON AN ADJACENT BUILDING This clause becomes Horizontal flue distance from opposing wall and other terminals (see Figure 12) Delete 1 st paragraph. Substitute: Where a horizontal terminal is adjacent to two or more vertical wall surfaces, as shown in Figure 11B the distance from the side of the terminal shall be at least UP/10/7

23 as given in Figure 12 Line F, based upon the total rating of the appliance or group of appliances. The recess shall not incorporate any roof/cover. FIGURE 11B Delete Figure. Substitute: Z T Key: Z See clause and Figure 11A. T Maximum depth of the building. See clauses , and Figure 11A. FIGURE 11B HORIZONTAL FLUE TERMINALS ENCLOSED BY TWO OR MORE VERTICAL WALLS (PLAN VIEW) UP/10/8

24 FIGURE 12 Delete the Figure. Substitute: Distance = x (net heat input kw) Distance from opposing surface (mm) G F 2000 Distance = x (net heat input kw) Clean Air Act lower limit 333 kw net heat input Appliance net heat input (kw) F opposing flat surface G opposing terminal Note: The equations on the graph are represented by the appropriate plotted line. FIGURE 12 MINIMUM SPACING OF ROOM SEALED APPLIANCE FANNED DRAUGHT TERMINALS FROM OPPOSING FLAT SURFACES F AND OTHER TERMINALS G. UP/10/9

25 FIGURE 13 Delete the Figure. Substitute: Distance Height = 8.16 x (Net heat input MW) 0.6 Minimum distance (m) Distance Height = 6.8 x (Net heat input MW) Distance Height = 2.72 x (Net heat input MW) Heat Input (Net) MW 2.5 Minimum height above ground to base of grille Fan assisted air intake Openable window or natural draught vent/grille Figure 13 Note Delete Note. Substitute: Distance to nearest building Note 1: The equations on the graph are represented by the appropriate plotted line. Note 2: The distance needs to be rounded up to the nearest metre. UP/10/10

26 Sub-Section Delete the paragraph. Substitute: 12.2 Wherever a bio-mass appliance is installed alongside a gas fired appliance, a risk assessment shall be performed to consider the hazards of dust accumulation in the vicinity of the appliances in compliance with DSEAR. In all cases, where biomass appliance is to be installed in conjunction with other heating/process plant and or as an individual appliance, regardless of output, the Local Authority planning office should be contacted to be made aware of the proposed installation. Sub-Section Delete 1 st and 2 nd paragraph. Substitute: 12.5 The Clean Air Act 3 rd Edition of the Chimney Heights Memorandum may not be totally relevant or appropriate for accessing a flue discharge height for submission to the Local Authority for approval. If the discharge contains particulates (PM10, PM2.5) and/or high levels of Nitrous Oxides (NO x ) then the Memorandum would not be appropriate. Consultation should be held with the Local Authority for all proposed bio-fuel installations at an early stage to obtain guidance (see Appendix 8 for more guidance). The determination of the discharge height for a gas fired appliance, where installed with bio-fuel fired appliances, should be performed separately using this Standard. If the gas fired boiler discharge is separated by a distance of 5U from the bio-fuel fired boiler discharge then the chimneys can be treated as separate discharges with different discharge heights. However, if the gas fired appliance discharge is within that 5U distance, then both discharges should terminate at the worst case height. A2.3 Delete 10 th bullet. Substitute: A2.3 Add bullet point: L153 Managing health and safety in construction. CDM Regulations ACoP and guidance. A2.4 Delete 7 th bullet point and substitute: IGEM/UP/12 Edition 2 Application of burners and controls to gas fired process plant A2.5 Add bullet point: BB101 Building Bulletin 101 Ventilation of school buildings. UP/10/11

27 A3.1 Delete 1 st, 2 nd and 3 rd paragraphs and the Note. Substitute: Since 1956, the requirements for chimney heights have been enacted within the Clean Air Act (CAA) and supported by the 3 rd Edition of the Memorandum on Chimney Heights. These requirements concentrated on dust smoke and grit emissions, which today are not relevant to the vast majority of gas and liquid fuel installations for heating and hot water in buildings. For installations burning very low sulphur (VLS) fuels such as NG, LPG and Gas Oil, the official guidance on chimney heights has been through the 3rd Edition of the Memorandum on Chimney Heights, but this information was based upon sulphur emissions. In the early years of the drafting of IGE/UP/10 (then BG IM/11) the British Gas research was based upon NO x emissions. In reality the end result of the chimney height was little different from a design according to the 3 rd Edition. However, the guidance contained in IGEM/UP/10 has been based upon the British Gas work and not the 3 rd Edition and it has been a primary source for the information on chimney heights for NG and LPG installations amongst designers and installers. This 3 rd edition of CAAM is no longer freely available and is considered by many specialists not to be up-to-date with modern appliance technologies and performance. As such, compliance with this Standard satisfies the requirements of the CAA. For all gas, bio-mass and solid fuelled plant above 20 MW reference has had to be made to the Technical Guidance Note (Dispersion) D1 (Guidelines on discharge stack heights for polluting emissions) as the advice given in the 3 rd Edition of the memorandum on chimney heights has not covered such plant. This is a little known but extremely important document, especially for solid fuels and bio-mass installations. Note: The document D1 is currently out of print, but may still be available.. A3.2 Delete 4 th paragraph. A3.2 Delete 7 th paragraph. Substitute: Notification for gas systems comes into effect for any system having a heat input totalling more than 333 kw net (approximately 366 kw gross). A3.3 Delete the first sentence of the 1 st paragraph. Substitute: The requirements of the Clean Air Act specify a design exit velocity for the flue system operating under: A3.3 Delete 2 nd paragraph. Substitute: Modern boilers are able to operate under high turndown ratios from high to low fire and therefore make it impractical to enforce above the design velocities. Attempts to reduce the exit area of the flue to achieve higher exit velocities have been resisted as the practice can make the appliances less reliable and more importantly affect the safety of the appliance. This design limitation has been removed from this edition of IGEM/UP/10. UP/10/12

28 A3.7 Delete 3 rd paragraph. Substitute: Equally, a row of small room sealed appliances not exceeding 70 kw each located on a wall with flues say less than 1.5 m (5 times 0.3 m from BS 5440 Part 1) apart would be treated as a group. This would then impact on the height and location of the termination. A4.1.3 Delete the Note. Substitute: Note: VLS fuels include NG, gas oil, premium kerosene, butane, propane and may apply to some bio-gases and bio-liquids. Fuels which have sulphur content above 0.04% by weight see Clean Air Act. A4.1.5 Delete the paragraph. Substitute: This Appendix is concerned only with normal emissions of gaseous pollutants; it does not deal with grit and dust or afford protection against combustion odours or excessive concentrations of CO produced by inefficient combustion. There may be circumstances in which this Appendix will not provide adequate guidance, e.g. where a chimney is to discharge on a roof with complicated structures or in difficult topography or where there are a number of closely adjacent chimneys. In such cases, specialist advice needs to be sought. A4.1.6 Delete the paragraph. Substitute: The Appendix is applicable to chimneys of VLS fuel burning appliance with total installed net heat input (that is, heat release rates in the combustion chamber) exceeding 70 kw and up to 333 kw net heat input. It does not deal with direct fired heating systems which discharge into the space being heated. Nor does it apply to incinerators or very large systems, which require separate treatment depending on the pollutants emitted. A4.6.3 Delete Example 1. Substitute: For chimney B, the uncorrected chimney height U (from Figure 15C) is 7.6 m. Therefore the final chimney height is (H C ) = H B + 0.6(U) = (7.6) = (14.56) 15 m (round up to the nearest metre). Appendix 5 - Guidance: Delete the text and substitute: The Secretary of State has in previous years produced the following guidance on the calculation of chimney heights: HMIP Technical Guidance Note D1: Guidelines on Discharge Stack Heights for Polluting Emissions. Published by HMSO, ISBN rd Edition of the 1956 Clean Air Act Memorandum on Chimney Heights. Both guidance notes are now unfortunately out of print, however you can request a copy from the British Library at Compliance with this standard meets the design requirements for NG, LPG and clean biogases. UP/10/13

29 Appendix 5 Delete Part 2 E Table centre column. Substitute: Net calorific value (MJ kg -1 or MJ m -3 ) A7.2 Delete the value of expression E in the third formula. Substitute: E is an excess air percentage value. A7.2 Delete the title of the eighth formula. Substitute: The total air inlet requirement is: A8.2 Delete the 1 st paragraph. Substitute: The determination of the discharge height for a gas fired appliance where installed with a bio-mass fired appliance needs to be performed separately using the Clean Air Act guidance. If the gas fired appliance discharge is separated by a distance of 5U (CAAM procedure) from the bio-mass fired boiler discharge then the chimneys can be treated as separate discharges with different discharge heights. However, if the gas appliance discharge is within the 5U distance (CAAM procedure) then both discharges are to terminate at the worst case height. A8.4 Delete this Sub-Section. Substitute: THE ENVIRONMENT ACT, THE CLEAN AIR ACT AND LAQM The Clean Air Act requires the chimney height of a biomass boiler burning more than 45.4 kg h -1 of biomass fuel (approximately 100 kw) to be approved by the Local Authority. (Below 45.4 kg per hour the relevant Building Regulations apply). Under the Environment Act 2005, Local Authorities throughout the UK have a statutory duty to review and assess air quality in their council area against the objectives set for nitrogen dioxide, particles measuring 10 µm or less, sulphur dioxide and other gases, they are required to identify any likely incidents of these Air Quality Objectives that may be or are being exceeded. Technical document LAQM. TG(09) provides guidance on meeting the provisions of the Environment Act. Note The examples have been removed because LAQM also places a great emphasis on particulate emissions, which may have a significant effect on the final chimney height. UP/10/14

30 Appendix 9 Delete the entire Appendix. Substitute: APPENDIX 9 : RISK ASSESSMENT FOR POSITIONING OF HORIZONTAL FLUES TERMINATIONS Further to the requirements in Section 8 under clause and Figure 7 the following risk assessment gives guidance for the positioning of horizontal flues. Type C appliances with net heat input exceeding 70 kw and not exceeding 333 kw low level flue discharge risk assessment (including net heat input for groups of appliances) No. Regarding the flue position NO YES 1 Is the proposed flue termination within the distance in Figure 12 Line G of a road, path, track, thoroughfare, walkway, property boundary or area which is used for general public access other than for maintenance purposes? N Y 2 Is the proposed flue termination within the distance in Figure 12 Line G to a playground, school yard, seating area, or area where there may be a public gathering? N Y 3 If the proposed flue termination enclosed on more than two sides then does it comply with the requirements of Figure 11B? N Y 4 Is the proposed flue termination within the distance in Figure 12 Line G of a surface or building element that may be affected by corrosion or deterioration from plume condensate? 5 Is the proposed flue position in an area where vehicles could be parked within distances from Figure 12 Line G to the flue? 6 Are there shrubs or trees within minimum distances shown on Figure 12 Line G of the proposed terminal position? 7 Is the proposed flue termination within a light well? N Y 8 Are the products of combustion from the proposed flue position likely to build up under unfavourable atmospheric conditions, due to poor cross flow of air caused by enclosures or adjacent structures? N Y 9 Is the flue termination position likely to cause a nuisance to adjoining properties? N Y Building Regulations part J NO YES 10 Is the proposed flue termination is less than 300 mm from the boundary of the property, as measured from the side of the terminal to the boundary? N Y Regarding the Clean Air Act NO YES 11 Is the total output of individual, or group of flue terminals (if within 5U (see A3.7)), greater than 333 kw net heat input? N Y General NO YES 12 Are there any other considerations that are required for this risk assessment, see separate sheet? N Y 13 Comments: N N N Y Y Y Following the resulting risk assessment, the flue termination position is considered as: All answers are blue (N) Flue position is suitable Any answer is orange (Y) Flue position is unsuitable Company name Gas safe registration number Engineer Engineer code name Job number Date Customer first line of address Customer Post code name UP/10/15

31 Appendix 11 Appendix 11 Add title to Flue smoke test certificate FIGURE 19 A TYPICAL SMOKE TEST CERTIFICATE Add title for the Flue leakage test (leakage test sheet) FIGURE 20 A TYPICAL FLUE LEAKAGE TEST RECORD END OF THESE UP/10 AMENDMENTS UP/10/16

32 IGEM/UP/10 Edition 4 COMMUNICATION AND COMMUNICATION The following Amendments (February 2017) apply to all copies of IGEM/UP/10 Edition 4 published in 2014 and Contents Appendix Add: 12 Flue/chimney identification plate Delete Note 4. Substitute: Note 4: The ratio of gross to net heat input is, approximately, 1.11:1, 1.09:1 and 1.08:1 for appliances on Natural Gas (NG)/Towns Gas, propane and butane respectively. For the purposes of this Standard, where gross heat inputs represent requirements of existing standards, they are converted to net using a conversion factor in all cases. For example, 600 kw gross heat input = = 545 kw net heat input for NG. Delete the clause. Substitute: The quantity of air and extract ventilation for plant of total net heat input exceeding 70 kw and not exceeding 1.8 MW shall be as given in Table 2. For net heat inputs exceeding 1.8 MW, the quantity of air and extract ventilation shall at least be as given in Table 2 or the ventilation flow rate for the specific plant shall be calculated using an appropriate method. Where a bio-fuelled appliance is installed in the same space as a gas appliance, the additional mechanical ventilation provisions for that appliance shall be as per that of a gas fired appliance as detailed in Table Add a note: Note: Additional requirements for flue systems in teaching establishments are specified in IGEM/UP/11 under Ventilation and Flues. Add new clause. It is a requirement of BS EN 1856 that all flue installations are fitted with a data plate (see Appendix 12). Delete the clause. Substitute: All chimney and flue components shall be fit for purpose and suitable for the application. Typical materials are listed in Table 3. Add Note 3: Note 3: These materials may not be suitable for every system. For example: stainless steel materials are the preferred material for many applications. depending upon maximum combustion gas temperatures and application suitability, plastic materials and coatings may be appropriate. UP/10/17

33 Table 3 Delete the Table. Substitute: STAINLESS STEEL MATERIALS ALUMINIUM MATERIALS PLASTIC MATERIALS BS EN ISO and -2 material grades 304S31 316S31 As specified in BS EN and BS EN As specified in BS EN ISO BS EN Delete the clause. Substitute: Where the appliance combustion gases may cause condensation within the flue system during use, the flue system including fan diluted flues, fans and attenuators shall be constructed of materials resistant to corrosion and that have an acceptable life expectancy. Note 1: Further information on materials is given in clause Note 2: Note 3: Some flue systems may require lining or separate flues for condensing applications. Where an attenuator is used, it may be of galvanised steel on the inlet side of any chimney connection. Galvanised ducting is not normally recommended for fan diluted flue applications due to its short life expectancy Delete the clause. Substitute: For any termination or group of terminations with a total net heat input exceeding 333 kw, the general requirements of this Sub-Section shall apply and approval must be sought from the Local Authority prior to commencement of the installation. Horizontal flue terminations (other than for fan diluted flues, see Sub- Section 8.7.5) are not permitted for any termination or group of terminations with a total net heat input exceeding 333 kw net heat input. For Horizontal flue terminations not exceeding 333 kw net heat input (other than for fan diluted flues, see Sub-Section 8.7.5) the general requirements of this Sub-Section shall apply (see clause ). However, for any termination or group of terminations the risk assessment (see Appendix 9) shall be completed to ensure compliance and maybe subject to approval by the local Environmental Health Officer (EHO). Due regard shall be given to the type of flue design for which the appliance is certified and detailed in the manufacturer s instructions Add Note: Note: Horizontal flue terminations from room sealed appliances are not treated as an opening to a building. For minimum spacing distances between horizontal flue terminations, refer to manufacturer s instructions or clause Delete clause. Substitute The minimum horizontal spacing between room sealed flue terminals and nearby air inlets shall be distance W for natural draught and distance Y for fanned draught flues as shown in Figure 7 unless otherwise specified by the manufacturer. UP/10/18

34 Delete first paragraph. Substitute Where a horizontal terminal is adjacent to two or more vertical wall surfaces, as shown in Figure 11B the distance from the side of the terminal shall be at least as given in Figure 7 Line Y, based upon the total rating of the appliance. The recess shall not incorporate any roof/cover Add new clause: Any mechanically assisted flue including the fan shall be constructed of a material suitable for the application (see clause ) Add Note to the clause Note 3: A suitable combustion analyser is to be used to measure all combustion product constituents detailed Delete first paragraph. Substitute: Any fan diluted flue system, including the fan and its balancing damper shall be constructed of a material suitable for the application (see clause ) Delete note to the clause. Substitute: Note 2: Flue systems are to be designed to perform within the capacity of the boiler flue fans. Due to the high turndown ratio of these appliances, six appliances to a common flue ought to be the limit. Where multiple boilers on common flues are serving both heating and hot water, due to the vastly different operational characteristics, it is recommended the water supply appliances have a dedicated separate flue system (see A ). Delete the clause and the note. Substitute: If there are design exceptions a suitable durable SDVN label/sign shall be displayed in the plant room indicating that the design complies with IGEM/UP/10 except as indicated on the label/sign. In addition, also reference if an Environmental Waiver has been permitted by the Local Authority. Note: A typical design of SDVN label is shown in Appendix 6. UP/10/19

35 FIGURE 7 Delete the Figure and substitute: Note 1: Note 2: Note 3: All vertical flues will terminate above roof level and not be nearer any opening than distance V for open flued, V/Y for fanned draught or W for natural draught appliances. The equations on the graph are represented by the appropriate plotted line. For terminal locations below the opening, V; W and Y are not diagonal dimensions but a horizontal or vertical distance from the terminal. The prohibited area below an opening is the width of V; W or Y and 2.5 m vertically. FIGURE 7 THE MINIMUM DISTANCE OF FLUE TERMINAL(S) FROM ANY OPENING INTO A BUILDING UP/10/20

36 Figure 8 Delete the Figure. Substitute: UP/10/21

37 Figure 9 Delete formula on the graph. Substitute: U = [Q] 0.6 Where Q = Net heat input (MW) Figure 11B Delete the Figure. Substitute: Note: The length of the vertical walls must not allow products of combustion to build up and/or be likely to cause a nuisance under unfavourable atmospheric conditions, due to poor cross flow of air. Appendix A2.4 Add bullet point IGEM/UP/11 Gas installations in educational establishments Appendix Delete the clause. Substitute: A4.6.2 Where VLS fuels are used the uncorrected chimney height U is determined from the net heat input, which is obtained from the equation: Q = (W x B)/(3600 x 1.11) Equation 1 Where: Q is the net heat input MW W is the maximum rate of combustion of fuel kg h -1 for mass or m 3 h -1 for volume B is the respective net calorific value MJ kg -1 or MJ m 3 (if needed these can be converted using the density of NG at 0.74 kg m -3 or of LPG at 1.85 kg m -3 ). The uncorrected chimney height (U) can then be derived from the net heat input (Q) using the appropriate equation below: For heat inputs from 30 MW to 150 MW U = [Q] 0.6 (1 (6 x 10-5 [Q] 1.69 )) Equation 2 UP/10/22

38 For heat inputs less than 30 MW, the equation may be simplified by omitting the part in brackets. U = [Q] 0.6 Equation 3 Alternatively Figure 15A, 15B and 15C can be used to obtain the values for U as related to the heat inputs Q. Figure 15A Delete the formula on the graph. Substitute: U = [Q] 0.6 (1 (6 x 10-5 [Q] 1.69 )) Where Q = Net heat input (MW) Figure 15B Delete the formula on the graph. Substitute: U = [Q] 0.6 Where Q = Net heat input (MW) UP/10/23

39 Figure 15C Delete the Figure. Substitute: U = [Q] 0.6 Where Q = Net heat input (MW) Net heat input (MW) 25 Appendix A4.6.3 Example 1 Delete the two bullet points. Substitute: 500 kw net Example A 15 MW net Example B. Appendix Delete third paragraph. Substitute: A4.6.5 A definite chimney is not required for fan diluted emissions from appliance systems rated at less than 5.45 MW net (6 MW gross) heat input where the effluent is emitted through the roof and the conditions in a-c) above are met. However, if there is general access to the roof, the termination is to be 3 m minimum height above the roof. UP/10/24

40 Appendix A Add bullet 304 or 316 stainless steel Appendix Delete clause. Substitute: A Consideration to be given to where condensate is to be discharged including: preference is to a foul sewer drainage system is not to be disposed to a greywater recovery system the pipe is to be a minimum of 22 mm diameter if there is a risk of the condensate freezing, the pipe to be a minimum of 32 mm diameter exposed condensate drainage pipe is to be protected with waterproof pipe insulation fitting any condensate trap adjacent to the appliance. UP/10/25

41 Appendix 6 Delete the title and the form. Substitute: APPENDIX 6 : SYSTEM DESIGN VERIFICATION AND ENVIRONMENTAL WAIVER NOTICE SYSTEM DESIGN VERIFICATION AND ENVIRONMENTAL WAIVER NOTICE This flue system has been designed and installed in accordance with Institution of Gas Engineers & Managers Standard IGEM/UP/10 Installation of flued gas appliances in industrial and commercial premises with the following exceptions: Design Company:.. Installation Company:.. Gas Safe Registration No:... Date: Site Reference Number: Contract Number: Customer: Consultant: Environmental Waiver reference, if applicable: UP/10/26

42 Appendix 9 Delete the first sentence and the table. Substitute: Further to the requirements in Section 8 under clause and Figure 7 the following risk assessment gives guidance for the positioning of horizontal flues. This form should be completed before work commences and undertaken by a person who is competent to undertake the risk assessment. Type C appliances with net heat input exceeding 70 kw and not exceeding 333 kw low level flue discharge risk assessment (including net heat input for groups of appliances) No. Regarding the flue position NO YES 1 Is the proposed flue termination within the distance in Figure 12 Line G of a road, path, track, thoroughfare, walkway, property boundary or area which is used for general public access other than for maintenance purposes? N Y 2 Is the proposed flue termination within the distance in Figure 12 Line G to a playground, school yard, seating area, or area where there may be a public gathering? N Y 3 If the proposed flue termination enclosed on more than two sides then does it comply with the requirements of Figure 11B? N Y 4 Is the proposed flue termination within the distance in Figure 12 Line G of a surface or building element that may be affected by corrosion or deterioration from plume condensate? 5 Is the proposed flue position in an area where vehicles could be parked within distances from Figure 12 Line G to the flue? 6 Are there shrubs or trees within minimum distances shown on Figure 12 Line G of the proposed terminal position? 7 Is the proposed flue termination within a light well? N Y 8 Are the products of combustion from the proposed flue position likely to build up under unfavourable atmospheric conditions, due to poor cross flow of air caused by enclosures or adjacent structures and/or likely to cause a nuisance? 9 Is the flue termination position likely to cause a nuisance to adjoining properties? N Y Building Regulations part J NO YES 10 Is the proposed flue termination less than 300 mm from the boundary of the property, as measured from the side of the terminal to the boundary? N Y Regarding the Clean Air Act NO YES 11 Is the total output of individual, or group of flue terminals (if within 5U (see A3.7)), greater than 333 kw net heat input? N Y N N N N Y Y Y Y 12 General NO YES Are there any other considerations that are required for this risk assessment, see separate sheet. N Y 13 Comments: Following the resulting risk assessment, the flue termination position is considered as: All answers are blue (N) Flue position is suitable Any answer is orange (Y) Flue position is unsuitable Company name Gas safe registration number Engineer Engineer code name Job number Date Customer first line of address Customer Post code name UP/10/27

43 Appendix 12 Add: APPENDIX 12 : FLUE/CHIMNEY IDENTIFICATION PLATES In accordance with BS EN chimney identification plates retaining information related to the product specification and are to be permanently secured to a chimney system and/or in close proximity to it in an un-obstructive but visible location. Suitable fixing positions would be either to/or near any clean outdoors, draught stabilisers, manual dampers or boiler connection components. The plate is not to be removed or defaced and in the event the manufacturer/supplier is to be informed so that the appropriate information can be restored to the chimney system. 25 mm 50 mm AN EXAMPLE OF A FLUE/CHIMNEY IDENTIFICATION PLATE END OF AMENDMENTS TO IGEM/UP/10 Edition 4. UP/10/28

44 IGE/UP/12 COMMUNICATION The following Amendments (May 2009) apply to all copies of IGE/UP/12, published in A (a) 2 nd para Delete equation. Substitute: (mm) (see Figure 12). Figure 12 Delete entirely. Substitute. UP/12/1

45 IGEM/UP/16 COMMUNICATION The following Amendments (Aug 2013) apply to all copies of IGEM/UP/16, published in Table 4 Question 4c Delete the question. Substitute: Is it possible to fit at least 100 cm 2 free area ventilators at each end of the duct to the outside air or smoke safety ventilation according to BS 8313? Table 4 Note 2 first sentence and 1 st and 2 nd bullets delete. Substitute: Note 2: For horizontal service ducts or ceiling voids above a room either fit 100 cm 2 free area ventilators: at each end of the duct to the outside air, preferably on all four walls, or, into the room at each pipe joint location and 100 cm 2 free area ventilators adjacent to the four perimeter walls. A4.4.1 A4.4.1 Paragraph (a) Question 4c Delete. Substitute: Is it possible to fit at least 100 cm 2 free area ventilators at each end of the duct to the outside air or smoke safety ventilation according to BS 8313? Paragraph (c) Delete. Substitute: (c) In this example, ceiling ventilation into the room will be required adjacent to all four walls of 100 cm 2 free area and a grille near to each joint location of 100 cm 2 free area. The four perimeter vents should be centrally located or distributed along the walls (see Note 2 to Table 4). If the space had access to an external wall it would be better to exchange the 100 cm 2 ventilator on that wall with a 42 cm 2 (see Table 1, column 2) external ventilator located as high as practicable within the space. A4.6 Note Delete the Note. Substitute: Note: For ducts that are above ground level and spaces/enclosures of net internal volumes not exceeding 10 m 3, additional ventilation shall be provided. For net internal volume greater than 10 m 3 and provided adventitious ventilation exceeds 0.5 air change per hour, additional ventilation is not required. A4.6 2 nd bullet Delete first line entirely. Substitute: for new installations, the OP shall not exceed 100 mbar and either of the following shall be applied: A4.6 1 st bullet of 2 nd bullet delete first sentence entirely. Substitute: the room shall be ventilated externally at high and low levels via ducts using the values given in Table 1 column 2 provided that the room is visited regularly (at least weekly). UP/16

46 IGEM/UP/19 Communication The following Amendments (Jan 2015) apply to all copies of IGEM/UP/19, published in FIGURE 3 Delete the Figure entirely. Substitute: UP/19

47 UP/19