First Revision No. 16-NFPA [ Global Input ] Supplemental Information. Submitter Information Verification. Committee Statement

Transcription

1 of 152 2/9/ :48 AM First Revision No. 16-NFPA [ Global Input ] Change document title to: Standard for Fluid Heaters See Word file for changes related to converting the document from a recommended practice to a standard. Supplemental Information File Name 87-Reorg.docx Description Submittal Date: Wed Dec 23 08:23:47 EST 2015 Response Message: The Technical is seeking to convert the document from a Recommended Practice to Standard during this cycle. As such, the word should has been replaced by shall wherever applicable, and the words recommended practice have been replaced by standard. Work was performed in task groups to address updating the document during this revision cycle to best facilitate this conversion.

2 of 152 2/9/ :48 AM First Revision No. 47-NFPA [ Detail ] Threaded connections should be limited to instruments and other miscellaneous connections less than or equal to 1.25 in. (32 mm). Submittal Date: Wed Dec 23 10:17:54 EST 2015 : This was altered for consistency with Response Message:

3 of 152 2/9/ :48 AM First Revision No. 17-NFPA [ Section No ] Global FR This recommended practice standard covers Type F, Type G, and Type H fluid heaters and related equipment. Submittal Date: Wed Dec 23 08:25:52 EST 2015 : The standard no longer references the heater type separately. Response Message:

4 of 152 2/9/ :48 AM First Revision No. 18-NFPA [ Section No ] The following types of heaters are covered by this recommended practice: Class F heaters, which have fluid inside the tubes with a relatively constant flow rate Class G heaters, which have fluid inside the tubes with a modulated flow rate and firing rate Class H heaters, which have a heat source (combustion or electricity) inside the tubes Submittal Date: Wed Dec 23 08:26:51 EST 2015 : The standard no longer references the heater type separately. Response Message:

5 of 152 2/9/ :48 AM First Revision No. 114-NFPA [ Section No. 1.3 ] Global FR * Application. This recommended practice standard applies to new installations and to alterations or extensions of existing equipment This recommended practice applies to new installations and to alterations or extensions of existing equipment Chapters 1 through 8 apply to equipment described in subsequent chapters except as modified by those chapters Chapter 7 applies to all operating fluid heaters. Submittal Date: Thu Jan 07 11:37:11 EST 2016 : The standard no longer references the heater type separately. Response Message:

6 of 152 2/9/ :48 AM First Revision No. 20-NFPA [ Section No. 2.2 ] 2.2 NFPA Publications. National Fire Protection Association, 1 Batterymarch Park, Quincy, MA NFPA 10, Standard for Portable Fire Extinguishers, edition. NFPA 11, Standard for Low-, Medium-, and High-Expansion Foam, edition. NFPA 12, Standard on Carbon Dioxide Extinguishing Systems, edition. NFPA 13, Standard for the Installation of Sprinkler Systems, edition. NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection, edition. NFPA 17, Standard for Dry Chemical Extinguishing Systems, edition. NFPA 17A, Standard for Wet Chemical Extinguishing Systems, edition. NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, edition. NFPA 31, Standard for the Installation of Oil-Burning Equipment, edition. NFPA 54, National Fuel Gas Code, edition. NFPA 56, Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable Gas Piping Systems, 2014 edition. NFPA 58, Liquefied Petroleum Gas Code, edition. NFPA 70, National Electrical Code, edition. NFPA 79, Electrical Standard for Industrial Machinery, 2015 edition. NFPA 85, Boiler and Combustion Systems Hazards Code, edition. NFPA 86, Standard for Ovens and Furnaces, 2015 edition. NFPA 750, Standard on Water Mist Fire Protection Systems, 2015 edition. Submittal Date: Wed Dec 23 08:29:19 EST 2015 Response Message: NFPA 56 has been added as a reference due to the inclusion of this reference in the body of the document.

7 of 152 2/9/ :48 AM First Revision No. 109-NFPA [ Section No. 2.4 ] 2.4 References for Extracts in Recommendation Mandatory Sections. NFPA 54, National Fuel Gas Code, edition. NFPA 70, National Electrical Code, edition. NFPA 85, Boiler and Combustion Systems Hazards Code, 2016 edition. NFPA 86, Standard for Ovens and Furnaces, 2015 edition. NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances, edition. NFPA 820, Standard for Fire Protection in Wastewater Treatment and Collection Facilities, edition. Submitter Full Name: Sonia Barbosa Organization: [ Not Specified ] Submittal Date: Mon Dec 28 09:37:25 EST 2015 : Updating edition year. Response Message:

8 of 152 2/9/ :48 AM First Revision No. 21-NFPA [ Section No ] Burner. A device or group of devices used for the introduction of fuel and air into a fluid heater at the required velocities, turbulence, and concentration to maintain ignition and combustion of fuel Dual-Fuel Burner. A burner designed to burn either fuel gas or liquid fuel but not to burn both simultaneously Self-Piloted Burner. A burner in which the pilot fuel is issued from the same ports as the main flame or merges with the main flame to form a common flame envelope with a common flame base. [ 86, 2015] Submittal Date: Wed Dec 23 08:33:39 EST 2015 Response Message: The committee has decided to add the definition of self-piloted burner to the standard instead of referencing NFPA 86.

9 of 152 2/9/ :48 AM First Revision No. 22-NFPA [ Section No ] Fluid Heater. A fluid heater is considered to be any thermal fluid heater or process fluid heater with the following features: (1) Fluid is flowing under pressure. (2) Fluid is indirectly heated. (3) Release of energy from combustion of a liquid or gaseous fuel or an electrical source occurs within the unit Class F Fluid Heater. A heater that has fluid inside the tubes with essentially constant fluid flow rate and where the outlet temperature of the fluid is controlled by modulating the heat input rate to the heater Class G Fluid Heater. A heater that has fluid inside the tubes with modulated fluid flow rate (e.g., by process demand) and where the outlet temperature of the fluid is controlled by modulating the heat input rate to the heater Class H Fluid Heater. A heater that has the heat source (combustion or electricity) inside the tube(s) with fluid surrounding the tube. Submittal Date: Wed Dec 23 08:38:28 EST 2015 : Based on the changes in Chapter 9 the definitions have been updated accordingly. Response Message:

10 0 of 152 2/9/ :48 AM First Revision No. 24-NFPA [ Section No ] Pressure Regulator. Equipment placed in a gas line for reducing, controlling, and maintaining the pressure in that portion of the piping system downstream of the [device]. [54, ] Line Pressure Regulator. A pressure regulator placed in a gas line between the service regulator and the appliance (equipment) regulator. [ 86, 2015] Monitoring Pressure Regulator. A pressure regulator in a nonregulated state and set in series with another pressure regulator for the purpose of automatically taking over, in an emergency, control of the pressure downstream of the regulator in cases where pressure exceeds a set maximum. [ 86, 2015] Series Pressure Regulator. A pressure regulator in series with one service or line pressure regulator. [ 86, 2015] Service Pressure Regulator. A pressure regulator installed by the serving gas supplier to reduce and limit the service line gas pressure to delivery pressure. [ 86, 2015] Submittal Date: Wed Dec 23 08:41:27 EST 2015 : Based on changes in Chapter 8, these terms need to be added. Response Message:

11 1 of 152 2/9/ :48 AM First Revision No. 110-NFPA [ Section No ] Safe-Start Check. A checking circuit incorporated in a safety-control circuit that prevents light-off if the flame-sensing relay of the combustion safeguard is in the unsafe (flame-present) position due to component failure within the combustion safeguard or test incorporated in a combustion safeguard that prevents start-up if a flamedetected condition exists due to component failure within the combustion safeguard or flame detector(s) due to the presence of actual or simulated flame. [86, 2015] Submittal Date: Tue Jan 05 16:42:46 EST 2016 : Definition has been updated to match extract text. Response Message:

12 2 of 152 2/9/ :48 AM First Revision No. 23-NFPA [ Section No ] * Proof-of-Closure Switch. Non-field-adjustable A switch installed in a safety shutoff valve by the manufacturer that activates only after the valve is fully closed. [ 86, 2015] Submittal Date: Wed Dec 23 08:40:23 EST 2015 : Some listing agencies allow the ability to field adjust the proof of closure switch. Response Message:

13 3 of 152 2/9/ :48 AM First Revision No. 111-NFPA [ Section No ] Trial-for-Ignition Period (Flame-Establishing Period). The interval of time during light-off that a safety control circuit combustion safeguard allows the fuel safety shutoff valve to remain open before the combustion safeguard flame detector is required to supervise the flame. [86, 2015] Submittal Date: Tue Jan 05 16:50:19 EST 2016 : Definition has been updated to match extract text. Response Message:

14 4 of 152 2/9/ :48 AM First Revision No. 25-NFPA [ New Section after ] * Flame Rod. A sensor that employs an electrically insulated rod of temperature-resistant material that extends into the flame being supervised, with a voltage impressed between the rod and a ground connected to the nozzle or burner. [ 86, 2015] Supplemental Information File Name FR-25_A docx Description Submittal Date: Wed Dec 23 08:43:23 EST 2015 : Based on changes in Chapter 8, these terms need to be added. Response Message:

15 5 of 152 2/9/ :48 AM First Revision No. 26-NFPA [ Section No ] * Where seal leakage or diaphragm failure in a device can result in flammable gas or flammable liquid flow through a conduit or cable to an electrical ignition source, a conduit seal or a cable type that is sealed should be installed. Submittal Date: Wed Dec 23 08:46:30 EST 2015 Response Message: This has been relocated to Chapter 5 which addresses location construction and explosion mitigation.

16 6 of 152 2/9/ :48 AM First Revision No. 27-NFPA [ Section No ] Wiring and equipment installed in hazardous (classified) locations should comply with the applicable requirements of NFPA 70, National Electrical Code. Submittal Date: Wed Dec 23 08:48:51 EST 2015 : There is very little guidance on how to classify the area immediately around a heater. Response Message:

17 7 of 152 2/9/ :48 AM First Revision No. 29-NFPA [ Section No ] Global FR * Mixtures of thermal or process fluids should shall not be used unless such mixtures are in accordance with recommendations of the manufacturer of the fluids heater. Supplemental Information File Name A4.3.1_EN_ docx Description Submittal Date: Wed Dec 23 08:54:17 EST 2015 Response Message: The committee would like to ensure the heater manufacturer is consulted for mixtures of fluids.

18 8 of 152 2/9/ :48 AM First Revision No. 30-NFPA [ Section No ] 4.3.2* When a fluid is being changed from one fluid type to another, a study should be performed to determine that all aspects of the system are compatible with the new fluid. Changes to the fluid shall be in accordance with recommendations of the manufacturer of the heater. Submittal Date: Wed Dec 23 09:04:57 EST 2015 Response Message: The manufacturer of the heater has more technical expertise to determine the compatibility of a new fluid with their heater.

19 9 of 152 2/9/ :48 AM First Revision No. 115-NFPA [ Section No ] * Fluid heaters should shall be designed or located so as to prevent their becoming an ignition source to nearby flammable vapors, gases, dusts, and mists. Submittal Date: Thu Jan 07 11:41:21 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 5 Task Group Recommends this change.

20 0 of 152 2/9/ :48 AM First Revision No. 32-NFPA [ Section No ] * Fluid heaters should shall be constructed and or located to keep temperatures at combustible floors, ceilings, and walls less than 160 F (71 C). Submittal Date: Wed Dec 23 09:17:27 EST 2015 Response Message: The goal is to keep combustibles less than the desired temperature and either method can be used to accomplish this.

21 1 of 152 2/9/ :48 AM First Revision No. 33-NFPA [ Section No ] 5.2.4* Fluid heaters should shall withstand the strains imposed by expansion and contraction, as well as static and dynamic mechanical loads and seismic, wind, and precipitation loads as applicable. Submittal Date: Wed Dec 23 09:18:10 EST 2015 : Not all of these loads are applicable to every design. Response Message:

22 2 of 152 2/9/ :48 AM First Revision No. 35-NFPA [ Section No ] Heater pressure vessels operating at pressures greater than 15 psi (100 kpa) should shall be stamped as and protected with overpressure protection in accordance with ASME Boiler and Pressure Vessel Code, Section I or ASME Section VIII, Division 1 vessels. Submittal Date: Wed Dec 23 09:20:24 EST 2015 Response Message: This clarifies the requirement to include overpressure protection in accordance with ASME.

23 3 of 152 2/9/ :48 AM First Revision No. 36-NFPA [ Section No ] Tubing within the heat transfer area should shall have welded connections Tubing or piping outside the heat transfer area should shall have either flanged or welded connections Threaded connections can shall be permitted to be used outside the heat transfer area for instrument connections and pressure relief valve corrections connections of in. (32 mm) and smaller diameter only. Submittal Date: Wed Dec 23 09:22:26 EST 2015 : Manual of style corrections. Response Message:

24 4 of 152 2/9/ :48 AM First Revision No. 37-NFPA [ Section No ] Burners should shall be designed to prevent flame impingement on tubes and tube supports when operating at maximum heat release. Submittal Date: Wed Dec 23 09:24:24 EST 2015 : Flame impingement is not allowable at any level of heat release. Response Message:

25 5 of 152 2/9/ :48 AM First Revision No. 38-NFPA [ Sections , ] Fluid heaters should shall be designed to accommodate a specific range of fluid volume and mass and should for a specific range of fluid viscosities, densities, flow rates, and velocities Fluid heaters shall not be operated outside those the ranges specified in Submittal Date: Wed Dec 23 09:26:01 EST 2015 : To clarify the heater design requirements. Response Message:

26 6 of 152 2/9/ :48 AM First Revision No. 152-NFPA [ New Section after 5.3 ] Submittal Date: Tue Jan 19 13:49:42 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 5 Task Group Recommends this change.

27 7 of 152 2/9/ :48 AM First Revision No. 39-NFPA [ Section No ] 5.4.1* Building Makeup Air. A quantity of makeup air should shall be admitted to fluid heater rooms and buildings to provide the air volume required for fluid heater safety ventilation and combustion air. Submittal Date: Wed Dec 23 09:29:45 EST 2015 : Safety ventilation refers to Class A ovens and is not applicable to Fluid Heaters. Response Message:

28 8 of 152 2/9/ :48 AM First Revision No. 41-NFPA [ Section No ] Fluid heater recirculating and exhaust fans should shall be designed for the maximum heating system temperature anticipated temperature that they will be exposed to. Submittal Date: Wed Dec 23 09:33:06 EST 2015 Response Message: The previous wording was not specific enough regarding which temperature was being referenced.

29 9 of 152 2/9/ :48 AM First Revision No. 42-NFPA [ Section No ] Ducts should shall be constructed entirely of sheet steel or other noncombustible material capable of meeting the intended installation and conditions of service, and the The duct installation should shall be protected where subject to physical damage. Submittal Date: Wed Dec 23 09:37:56 EST 2015 Response Message: This has been changed to contain one requirement for each paragraph per the Manual of Style.

30 0 of 152 2/9/ :48 AM First Revision No. 44-NFPA [ Section No ] * All ducts should shall be made tight throughout and should have no openings other than those required for the operation and maintenance of the system. Submittal Date: Wed Dec 23 09:40:34 EST 2015 : This has been changed to contain one requirement per the Manual of Style. Response Message:

31 1 of 152 2/9/ :48 AM First Revision No. 43-NFPA [ Section No ] All ducts should shall be braced where required and should be supported by metal hangers or brackets where required. Submittal Date: Wed Dec 23 09:39:30 EST 2015 : This has been changed to contain one requirement per the Manual of Style. Response Message:

32 2 of 152 2/9/ :48 AM First Revision No. 45-NFPA [ Section No ] Stacks should shall be properly braced and should not be supported with guy wires. Submittal Date: Wed Dec 23 09:42:53 EST 2015 : The committee did not see a reason to restrict the application of guy wires. Response Message:

33 3 of 152 2/9/ :48 AM First Revision No. 46-NFPA [ Section No ] In applications where fluid leakage creates a hazard, all pipe connections should shall be welded except as permitted in and * Flange connections should shall be limited to pump, valve, boundary limit, spool, and equipment connections Threaded connections should shall be limited to instruments and other miscellaneous connections less than 1 in. (25 mm) or equal to 1.25 in. (32 mm). Detail FR-47 Submittal Date: Wed Dec 23 09:57:31 EST 2015 : This is adequately referenced by Response Message:

34 4 of 152 2/9/ :48 AM First Revision No. 116-NFPA [ Section No ] * The system should shall be pneumatically tested with dry air prior to being filled with fluid in accordance with the applicable piping code. Submittal Date: Thu Jan 07 11:45:38 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 5 Task Group Recommends this change.

35 5 of 152 2/9/ :48 AM First Revision No. 48-NFPA [ Section No ] Flanges, pumps, and equipment requiring routine maintenance should not be insulated. Submittal Date: Wed Dec 23 10:20:52 EST 2015 Response Message: Insulation is not required elsewhere in this standard therefore it is unneeded to provide an exception.

36 6 of 152 2/9/ :48 AM First Revision No. 117-NFPA [ Section No ] The fuel-burning system design should shall provide a supply of clean suitable combustion air delivered in amounts prescribed by the fluid heater designer or burner manufacturer across the full range of burner operation. Submittal Date: Thu Jan 07 15:47:40 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 6 Task Group Recommends this change.

37 7 of 152 2/9/ :48 AM First Revision No. 51-NFPA [ Section No ] The recommendation requirement of should shall not exclude prohibit the use of flue gas recirculation systems specifically designed to accommodate such recirculation. Submittal Date: Wed Dec 23 11:24:26 EST 2015 : To clarify that flue gas recirculation is permitted. Response Message:

38 8 of 152 2/9/ :48 AM First Revision No. 52-NFPA [ Section No ] * Where primary or secondary combustion air is provided by a fan or blower, combustion airflow or fan discharge pressure and damper position should be proven and interlocked with the safety shutoff valves mechanically, combustion air flow or pressure shall be proven and interlocked with the safety shutoff valves so that fuel gas cannot be admitted prior to establishment of combustion air and so that the gas is shut off in the event of combustion air failure. Submittal Date: Wed Dec 23 11:26:40 EST 2015 Response Message: The current language in NFPA 87 is contrary to current practice and was changed to correlate with NFPA 86.

39 9 of 152 2/9/ :48 AM First Revision No. 53-NFPA [ Section No ] Equipment Isolation Valves. Equipment isolation valves should shall meet the following requirements: (1) They should shall be provided for each piece of equipment. (2) They should shall have permanently affixed visual indication of the valve position. (3) They should shall be quarter-turn valves with stops. (4) Wrenches or handles should shall remain affixed to valves and should shall be oriented with respect to the valve port to indicate the following: (a) (b) An open valve when the handle is parallel to the pipe When the handle is parallel to the pipe, it shall indicate an open valve. A closed valve when the handle is perpendicular to the pipe When the handle is perpendicular to the pipe, it shall indicate a closed valve. (5) They should shall be readily accessible. (6) Valves with removable wrenches should shall not allow the wrench handle to be installed perpendicular to the fuel gas line when the valve is open. (7) They should shall be able to be operated from full open to full close and return without the use of tools. Submittal Date: Wed Dec 23 11:28:04 EST 2015 : The is was changed to shall to make the statements a requirement. Response Message:

40 0 of 152 2/9/ :48 AM First Revision No. 54-NFPA [ Section No ] Sediment traps should shall have a vertical leg with a minimum length of three pipe diameters [minimum of 3 in. (80 mm)] of the same size as the supply pipe, as shown in Figure Figure Method of Installing a Tee-Fitting Sediment Trap. Submittal Date: Wed Dec 23 11:29:25 EST 2015 : The current figure does not match the text. Response Message:

41 1 of 152 2/9/ :48 AM

42 2 of 152 2/9/ :48 AM First Revision No. 55-NFPA [ Section No ] An automatic flow control valve is shall be permitted to meet the recommendation requirement of , provided that it can compensate for the full range of expected source pressure variations. Submittal Date: Wed Dec 23 11:30:32 EST 2015 : The is was changed to shall be to adhere to the Manual of Style. Response Message:

43 3 of 152 2/9/ :48 AM First Revision No. 118-NFPA [ Section No ] * A vent between safety shutoff valves, where installed, shall conform to the following requirements : (1) Should It shall not be combined with other vents. (2) Should It shall terminate to an approved location. Submittal Date: Thu Jan 07 15:53:42 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 6 Task Group Recommends this change.

44 4 of 152 2/9/ :48 AM First Revision No. 56-NFPA [ Section No ] 6.2.9* Flow Control Valves. Where the minimum or maximum flow of combustion air or fuel gas is critical to the operation of the burner, flow valves should be equipped with limiting means and with a locking device to prevent an unintentional change in the setting. Submittal Date: Wed Dec 23 11:32:03 EST 2015 Response Message: The committee could not come to consensus on an interpretation of this requirement and has formed a task group to fully address this issue. The committee has chosen to delete this requirement at this time until a report from the task group is filed and welcomes public comment.

45 5 of 152 2/9/ :48 AM First Revision No. 58-NFPA [ Section No ] 6.3.3* Combustion Air The liquid fuel burning system design should shall provide for a supply of clean suitable combustion air delivered in the amounts prescribed by the fluid heater designer or burner manufacturer across the full range of burner operation Products of combustion should shall not be mixed with the combustion air supply The recommendation requirement of should shall not exclude prohibit the use of flue gas recirculation systems specifically designed to accommodate such recirculation * Where primary or secondary combustion air is provided by a fan or blower mechanically, combustion air flow or fan discharge pressure and damper position should shall be proven and interlocked with the safety shutoff valves so that the liquid fuel cannot be admitted prior to establishment of combustion air and so that the liquid fuel is shut off in the event of combustion air failure Where a burner register air adjustment is provided, adjustment should include a locking device to prevent an unintentional change in setting. Supplemental Information File Name A _EN_ docx Description Submittal Date: Wed Dec 23 11:37:32 EST 2015 Response Message: To clarify that flue gas recirculation is permitted. The current language in NFPA 87 is contrary to current practice and was changed to correlate with NFPA 86.

46 6 of 152 2/9/ :48 AM First Revision No. 59-NFPA [ Section No ] The liquid fuel shutoff should shall be by either of the following: (1) Emergency shutoff valve that meets the following requirements: (a) (b) (c) (d) It should shall be remotely located away from the fluid heater so that fire or explosion at a fluid heater does not prevent access to this valve. It should shall be readily accessible. It should shall have permanently affixed visual indication of the valve position. A removable handle should shall be permitted provided all the following requirements are satisfied: i. The valve position is clearly indicated whether the handle is attached or detached. ii. The valve handle is tethered to the gas main liquid fuel supply line no more than 3 ft (1 m) from the valve in a manner that does not cause personnel safety issues and that allows trouble-free reattachment of the handle and operation of the valve without untethering the handle. (2) Means for removing power to the positive displacement liquid fuel pump Submittal Date: Wed Dec 23 11:41:55 EST 2015 : The supply language was changed to reflect the correct fuel type. Response Message:

47 7 of 152 2/9/ :48 AM First Revision No. 60-NFPA [ Section No ] Manual shutoff valves should shall comply with the following: (1) Individual manual shutoff valves for equipment isolation should shall be provided for shutoff of the fuel to each piece of equipment. (2) Manual shutoff valves should shall be installed to avoid fuel spillage during servicing of supply piping and associated components. (3) Manual shutoff valves should shall display a visual indication of the valve position. (4) Quarter-turn valves with removable wrenches should shall not allow the wrench handle to be installed perpendicular to the liquid fuel line when the valve is open. (5) The user should shall keep separate wrenches (handles) affixed to valves and keep the wrenches oriented with respect to the valve port to indicate the following: (a) (b) An open valve when the handle is parallel to the pipe A closed valve when the handle is perpendicular to the pipe (6)* Valves should shall be maintained in accordance with the manufacturer s instructions. Lubricated valves should be lubricated and subsequently leak tested for valve closure at least annually. Submittal Date: Wed Dec 23 11:43:55 EST 2015 : Lubricated valves should not be used with liquid fuel systems. Response Message:

48 8 of 152 2/9/ :48 AM First Revision No. 62-NFPA [ Section No ] Flow Control Valves. Where the minimum or maximum flow of combustion air or the liquid fuel is critical to the operation of the burner, flow valves should be equipped with a limiting means and with a locking device to prevent an unintentional change in the setting. Submittal Date: Wed Dec 23 11:49:24 EST 2015 Response Message: The committee could not come to consensus on an interpretation of this requirement and has formed a task group to fully address this issue. The committee has chosen to delete this requirement at this time until a report from the task group is filed and welcomes public comment.

49 9 of 152 2/9/ :48 AM First Revision No. 63-NFPA [ Section No ] Global FR Safety Equipment. Safety equipment, including airflow flow interlocks, time relays, and temperature switches, should shall be in accordance with Chapter 8. Submittal Date: Wed Dec 23 11:50:10 EST 2015 : The flow interlocks should not be limited to air. Response Message:

50 0 of 152 2/9/ :48 AM First Revision No. 64-NFPA [ Section No ] The provisions of 6.6.4should shall apply to resistance heating systems, including infrared lamps, such as quartz, ceramic, and tubular glass types. Submittal Date: Wed Dec 23 11:51:03 EST 2015 : Listing of device types could limit or mislead the user. Response Message:

51 1 of 152 2/9/ :48 AM First Revision No. 119-NFPA [ Section No ] The party responsible should not release the fluid heater for operation before the installation and checkout of the recommended fluid heater shall not be released for operation before the installation and testing of the required safety systems have been successfully completed. Submittal Date: Thu Jan 07 16:18:15 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

52 2 of 152 2/9/ :48 AM First Revision No. 120-NFPA [ Section No ] The party responsible should ensure that any Any changes to the original design made during commissioning are shall be reflected in the documentation. Submittal Date: Thu Jan 07 16:24:17 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

53 3 of 152 2/9/ :48 AM First Revision No. 121-NFPA [ Section No ] 7.2.5* The party responsible should ensure that set Set points of all safety interlocks are interlock settings shall be documented. Submittal Date: Thu Jan 07 16:28:01 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

54 4 of 152 2/9/ :48 AM First Revision No. 122-NFPA [ Section No ] 7.2.6* The party responsible should perform Where fire protection systems are used, a test of the fire protection system shall be performed to verify proper functioning of all interlocks and actuators, where feasible. Submittal Date: Thu Jan 07 16:29:16 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

55 5 of 152 2/9/ :48 AM First Revision No. 123-NFPA [ Section No ] The party responsible should verify Where fire protection systems are used, it shall be verified that distribution piping for the extinguishing agent is unobstructed. Submittal Date: Thu Jan 07 16:30:57 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

56 6 of 152 2/9/ :48 AM First Revision No. 124-NFPA [ Section No ] * A confirmed source of combustible flammable gas should shall be provided to the inlet to of the equipment isolation valve(s) (see ) each time a combustible gas supply is placed into service or restored to service. Submittal Date: Thu Jan 07 16:34:40 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

57 7 of 152 2/9/ :48 AM First Revision No. 125-NFPA [ Section No ] Global FR * The personnel responsible for operating, maintaining, and supervising Personnel who operate, maintain, or supervise the fluid heater should shall be thoroughly instructed and trained in their respective job functions under the direction of a qualified person(s). Submittal Date: Thu Jan 07 16:35:41 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

58 8 of 152 2/9/ :48 AM First Revision No. 126-NFPA [ Section No ] The personnel Personnel responsible for operating, maintaining, and supervising who operate, maintain, and supervise the fluid heater should shall be required to demonstrate an understanding of the equipment, its operation, and the practice of safe operating procedures in their respective job functions. Submittal Date: Thu Jan 07 16:36:46 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

59 9 of 152 2/9/ :48 AM First Revision No. 127-NFPA [ Section No ] Operating, maintenance, and supervisory personnel should receive regularly scheduled retraining and testing. Personnel who operate, maintain, and supervise the fluid heater shall receive regularly scheduled refresher training and shall demonstrate understanding of equipment, its operation, and practice of safe operating procedures in the respective job function. Submittal Date: Thu Jan 07 16:40:55 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

60 0 of 152 2/9/ :48 AM First Revision No. 128-NFPA [ Section No ] Global FR * The training program should shall cover start-up, operation, shutdown, maintenance, and emergency lockout procedures in detail. Submittal Date: Thu Jan 07 16:42:00 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

61 1 of 152 2/9/ :48 AM First Revision No. 129-NFPA [ Section No ] The user should establish plant operating procedures Operating procedures shall be established that cover normal and emergency conditions and conditions, emergency conditions, and, where used, the use of fire protection equipment Plant operating procedures should Operating procedures shall be directly applicable to the equipment involved and should shall be consistent with safety requirements and the manufacturer s recommendations Plant operating procedures should shall be kept current with changes in equipment and processes Where different modes of operation are possible, plant operating procedures should shall be prepared for each operating mode and for switching from one mode to another. Submittal Date: Thu Jan 07 16:42:51 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

62 2 of 152 2/9/ :48 AM First Revision No. 130-NFPA [ Section No ] Plant operating procedures should prohibit the removal or disabling of safety devices Safety devices shall not be removed or rendered ineffective. Submittal Date: Thu Jan 07 16:44:54 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

63 3 of 152 2/9/ :48 AM First Revision No. 65-NFPA [ Section No [Excluding any Sub-Sections] ] For recirculating fluid systems, the instructions in 7.5.2should shall include instructions for inspection, testing, and maintenance of the heat transfer fluid. Submittal Date: Wed Dec 23 13:06:47 EST 2015 : This also applies to process fluid and is now more consistent with the rest of the standard. Response Message:

64 4 of 152 2/9/ :48 AM First Revision No. 67-NFPA [ Section No ] If indications of fluid overheating or contamination are observed, an investigation should shall be performed to evaluate and eliminate the cause of the overheating and contamination. Submittal Date: Wed Dec 23 13:10:28 EST 2015 : This clarifies what is being drained from the heater. Response Message:

65 5 of 152 2/9/ :48 AM First Revision No. 68-NFPA [ Section No ] 7.5.5* A test of the fire protection system, where used, to verify proper functioning of all interlocks and actuators should shall be performed at least annually. Submittal Date: Wed Dec 23 13:12:18 EST 2015 : Several plants and installations perform this test more often. Response Message:

66 6 of 152 2/9/ :48 AM First Revision No. 69-NFPA [ Section No ] Pressure relief devices should be tested at least annually to ensure that they are functioning properly. Submittal Date: Wed Dec 23 13:13:19 EST 2015 : This is adequately covered in Response Message:

67 7 of 152 2/9/ :48 AM First Revision No. 131-NFPA [ Section No ] * Testing of fuel gas safety shutoff valve seat leakage Valve seat leakage testing of the safety shutoff valve and valve proving systems should shall be performed at least annually in accordance with the manufacturer s instructions Testing frequency shall be at least annually The installation of a valve proving system or a valve with proof of closure shall not replace the requirement for seat leakage testing in Submittal Date: Thu Jan 07 16:46:15 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

68 8 of 152 2/9/ :48 AM First Revision No. 70-NFPA [ Section No ] The temperature indication set point and activation of the excess temperature controller limit interlock should shall be verified at least annually as being accurate. Submittal Date: Wed Dec 23 13:14:14 EST 2015 Response Message: The temperature indication has been removed as a requirement for the excess temperature interlock by prior action.

69 9 of 152 2/9/ :48 AM First Revision No. 132-NFPA [ Section No ] * Whenever combustible gas piping is placed into service or removed from service, any release of combustible When a quantity of flammable gas that can result in a hazardous condition is released as part of installation, commissioning, testing, maintenance, or decommissioning, the gas should shall be vented to an approved location. Submittal Date: Thu Jan 07 16:47:09 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

70 0 of 152 2/9/ :48 AM First Revision No. 133-NFPA [ Section No. 7.7 ] 7.7* Procedures. The user s operational and maintenance program should shall include procedures that apply to worker safety entry into equipment in accordance with all applicable regulations. Submittal Date: Thu Jan 07 16:48:01 EST 2016 Response Message: In transferring from a Recommended Practice to a Standard the Chp. 7 Task Group Recommends this change.

71 1 of 152 2/9/ :48 AM First Revision No. 73-NFPA [ Section No ] The recommendation requirement in 8.2.8should shall not prohibit a time delay applied to the action of a pressure-proving, flow-proving, or proof-of-closure safety switch, where the following conditions exist: (1) There is an operational need demonstrated for the time delay. (2) The use of a time delay is approved acceptable to the heater manufacturer. (3) The time delay feature is not adjustable beyond 5 seconds and does not serve more than one pressure-proving or proof-of-closure safety switch.. (4) A single time delay does not serve more than one pressure-proving or flow-proving safety device. The time delay feature is not adjustable beyond 10 seconds for process fluid flow-proving safety switches. (5) The time from an abnormal pressure or flow condition until the holding medium is removed from the safety shutoff valves does not exceed 5 seconds. Submittal Date: Wed Dec 23 13:26:24 EST 2015 : A process fluid flow-proving safety switch may require additional time delay. Response Message:

72 2 of 152 2/9/ :48 AM First Revision No. 74-NFPA [ Section No ] 8.2.9* Manual Emergency Switch. At least one hardwired manual emergency switch should be provided to initiate a safety shutdown A hardwired manual emergency switch at a local location shall be provided to initiate a safety shutdown of the entire fluid heater system A hardwired manual emergency switch at a remote location shall be provided to initiate a safety shutdown of the entire fluid heater system. Supplemental Information File Name A8.2.9_EN_ docx Description Submittal Date: Wed Dec 23 13:28:00 EST 2015 Response Message: Text was moved and edited from Chapter 9 and the requirement was clarified to require 2 emergency switches with the locations delineated.

73 3 of 152 2/9/ :48 AM First Revision No. 75-NFPA [ Section No ] Where transmitters are used in place of switches for safety functions, the following should shall apply: (1) The transmitter should possess a safety integrity level (SIL) rating of 2 shall be safety integrity level (SIL) 2 capable. (2) Transmitter failure should shall be detected and initiate a safety shutdown. (3) The transmitter should shall be dedicated to safety service unless listed for simultaneous process and safety service. Submittal Date: Wed Dec 23 13:30:45 EST 2015 : Align with NFPA and other related BMS changes. Response Message:

74 4 of 152 2/9/ :48 AM First Revision No. 78-NFPA [ Section No (B) ] (B) All changes to hardware or software should shall be documented and maintained in a file that is separate from the fluid heater PLC. Submittal Date: Wed Dec 23 13:35:45 EST 2015 : The use of "fluid heater" is not consistent with other PLC statements. Response Message:

75 5 of 152 2/9/ :48 AM First Revision No. 79-NFPA [ Section No [Excluding any Sub-Sections] ] When a combustion air blower or exhaust blower is provided, a timed pre-ignition purge should shall be provided that incorporates all of the following: (1) At least four system volumes of fresh air or inert gas are shall be introduced during the purging cycle. (2) The system volume includes shall include the combustion chambers and all other passages that handle the recirculation and exhaust of products of combustion to the stack inlet. (3) All passages from the air inlet to the heater to the stack inlet should shall be purged. (4) To begin the timed pre-ignition purge interval, all of the following conditions are shall be satisfied: (a) The minimum required pre-ignition purge airflow is shall be proved and interlocked. (b) (c) Fluid heaters with total pilot capacity over 400,000 Btu/hr (117 kw) should shall have at least one safety shutoff valve required by proved closed and interlocked between all pilot burners and the fuel supply. Fluid heaters with total capacity over 400,000 Btu/hr (117 kw) should shall have at least one safety shutoff valve proved closed and interlocked between all main burners and the fuel supply. (5) The minimum required pre-ignition purge airflow is shall be proved and interlocked and maintained throughout the timed pre-ignition purge interval. (6) Failure to maintain the minimum required pre-ignition purge airflow stops shall stop the pre-ignition purge and resets reset the purge timer. Submittal Date: Wed Dec 23 13:37:56 EST 2015 Response Message: Typical industrial purging process does not include the stack volume in the purge calculations. Language was clarified to verify that the position switch is interlocked

76 6 of 152 2/9/ :48 AM First Revision No. 80-NFPA [ Section No ] Repeating the pre-ignition purge on any fuel-fired system can shall not be omitted required where all of the following conditions are satisfied: (1) Each burner and pilot is supervised by a combustion safeguard in accordance with Section 8.9. (2) Each burner system is equipped with safety shutoff valves in accordance with Section 8.7. (3) At least one burner remains operating in the common combustion chamber of the burner to be re-ignited, and the burner remaining in operation provides ignition without explosion of any unintended release of fuel through the other burners not in operation. (4) All of the following conditions are satisfied (does not apply to fuel oil systems): (a) (b) (c) (d) (e) The number of safety shutoff valves required to close in Section 8.7 will close between the burner system and the fuel gas supply when that burner system is off. Safety shutoff valve seat leak testing is performed on at least a semiannual basis. The burner system uses natural gas, butane, or propane fuel gas. * It can be demonstrated, based on the leakage rate, that the combustible concentration in the heating chamber and all other passages that handle the recirculation and exhaust of products of combustion cannot exceed 25 percent of the LFL. The minimum airflow used in the LFL calculation in (4)(d) is proved and maintained during the period the burner(s) are off. Submittal Date: Wed Dec 23 13:42:02 EST 2015 Response Message: Align with NFPA The changes address the possible hazard for reigniting a burner without a repurge.

77 7 of 152 2/9/ :48 AM First Revision No. 81-NFPA [ Section No ] Natural Draft Purging When no combustion air blower or exhaust blower is provided, a natural draft purge is permissible shall be permitted provided all of the following conditions are satisfied: (1) * A permanently installed, interlocked combustible gas analyzer is provided that samples the firebox atmosphere in a location selected to account for the characteristics of the heater and the fuel(s) used: (2) Means are provided for proving that and interlocking the inlet air registers and outlet dampers are in the fully open position to admit air The purge should shall be considered complete when all of the following conditions are satisfied: (1) The flammable vapor or gas concentration in the combustion chamber is measured to be 25 percent or less of the LFL of the fuel in air. (2)* The inlet air registers and outlet dampers are proved in the fully open position. Submittal Date: Wed Dec 23 13:46:02 EST 2015 Response Message: This has been changed to meet the Manual of Style. Language was clarified to verify that the damper positions are interlocked

78 8 of 152 2/9/ :48 AM First Revision No. 82-NFPA [ New Section after ] Where direct spark ignition systems cause a false flame signal in required flame detectors and combustion safeguards, the electrical spark shall be terminated after the main burner trial-for-ignition period. Submittal Date: Wed Dec 23 13:48:15 EST 2015 Response Message: The standard is currently silent on the hazard that may be caused by the spark ignition caused by a false flame signal.

79 9 of 152 2/9/ :48 AM First Revision No. 83-NFPA [ Sections 8.6.1, 8.6.2, ] Where air from the exhaust or recirculating fans is required for combustion of the fuel, airflow should shall be proved and interlocked prior to an ignition attempt Reduction of airflow to a level below the minimum required level should shall result in closure of the safety shutoff valves Where a combustion air blower is used, the minimum combustion airflow or source pressure needed for burner operation should shall be proved and interlocked prior to each attempt at ignition. Submittal Date: Wed Dec 23 13:49:16 EST 2015 Response Message: Language was clarified to verify that the minimum combustion airflow or pressure is interlocked

80 0 of 152 2/9/ :48 AM First Revision No. 84-NFPA [ Section No ] * Safety shutoff valves should not be used as modulating control valves unless they are designed as both safety shutoff and modulation valves and tested for concurrent use. Submittal Date: Wed Dec 23 13:50:40 EST 2015 Response Message: Redundant,to , language was removed and annex material which did not correlate with

81 1 of 152 2/9/ :48 AM First Revision No. 86-NFPA [ New Section after ] Safety shutoff valves shall meet one of the following requirements: (1) The safety shutoff valves shall close in 1 second or less upon being de-energized. (2) Where safety shutoff valve closure time exceeds 1 second, the combined time for safety shutoff valve closure and flame failure response shall not exceed 5 seconds. Submittal Date: Wed Dec 23 13:54:00 EST 2015 Response Message: The language provides requirements for the closing time of safety shutoff valves on fluid heaters.

82 2 of 152 2/9/ :48 AM First Revision No. 87-NFPA [ New Section after ] 8.9.3* Where flame-sensing detectors can fail in the flame-proven mode, self-checking features shall be provided unless the burner is operated for periods less than 24 hours and the burner management system includes a safe-start component checking feature. [ 85: ] Submittal Date: Wed Dec 23 13:55:19 EST 2015 Response Message: Language was added to require that flame sensing devices that could fail into an unsafe mode have a self checking feature.