MANAGEMENT PROCEDURE FOR SAFE CONTROL OF OPERATIONS - THE CONTROL OF ROUTINE GAS SUPPLY OPERATIONS

Transcription

1 MANAGEMENT PROCEDURE FOR SAFE CONTROL OF OPERATIONS - THE CONTROL OF ROUTINE GAS SUPPLY OPERATIONS Policy Ref: Title: Author: Job title: GDN/PM/SCO/5 Management Procedure for Safe Control of Operations - The Control of Routine Gas Supply Operations Julian Yaxley Policy Manager Issue Date: April 2015 Owner: Ian Aldridge GDN/PM/SCO/5

2 GDN/PM/SCO/5 2 of 37 Version Control Change record Change Date Changes made Author February 2015 Changes to document detailed in Appendix F Julian Yaxley Reviewers Name Position Date Andy Turner Policy Engineer September 2014 Derfel Jones Network Controller September 2014 Robert Gregory Network Controller September 2014 Colin Steer Authorising Engineer, West Midlands, CMAC September 2014 Andy Whayman Skill and Competence Specialist ER&R September 2014 Laurence McGurk Gas Safety Manager September 2014 Paul Reed Lead Development Specialist September 2014 Jordan Rowbottom I&C Asset Integrity Manager September 2014 Dominic Cummings Iain Foster David Tindall Engineering Policy Manager, Scotia Gas Networks Distribution Strategy and Standards Manager, Northern Gas Networks Process Safety, Standards and assurance Manager, Wales and the West Gas Network December 2014 December 2014 December 2014 Kate Elleman Network Manager - WM January 2015 Brief history Management Approval See Appendix E & F Name Ian Aldridge Position Engineering Policy Manager UKD Implementation Implementation timescales Approved Published April 2015 Fully Implemented December 2015

3 GDN/PM/SCO/5 3 of 37 Contents Version Control... 2 Contents... 3 Document Summary Requirement For Formal Written Procedure When to use a Routine Operational Procedure Preparation of Routine Operational Procedures Co-ordination and communication with other parties Appointment of Competent Person Authorisation Scheduling of Works Authorising Engineer s conflict check Examination and authorisation Amendments to authorised routine operational procedures Permitry authorised outside normal working hours... 9 Chart 1 - Selection of Non Routine or Routine Operational Procedures Table 1 The application for permitry in relation to Hot Works activities.. 12 Flowchart 1 Routine Operational Procedures Clearance to proceed Authority for clearance to proceed Notification period to obtain clearance to proceed Administration requirements for forwarding routine operational procedures to the Network Controller/Meter Operations Controller Issue of clearance to proceed Notification of Start/End of Works & Cancellation or Deferment Start/end of works Cancellations, deferments and extensions Permits to Work Change of Authorising Engineer or Competent Person Change to Authorising Engineer Change to Competent Person Hand over (Delegated Authority) Deviations from Routine Operational Procedures Deviations prior to or after starting routine operational procedures Prior to Starting Routine Operational Procedures Briefing of routine operational procedures... 20

4 GDN/PM/SCO/5 4 of Inconsistency between routine operational procedure and on-site conditions Competent Persons acknowledgement of proposed operation Checklist Execution of Routine Operational Procedures Attendance of Competent Person on-site Changes of circumstances during the routine operational procedure Completion Appendix A Routine Operational Procedure Template Appendix A1 - Instructions for completing a routine operational procedure 26 Appendix B Graphical symbols Appendix C - Specimen of Pre Start Checklist for Routine Operations Appendix D Network analysis form Appendix E Brief history Appendix F Document changes End note... 37

5 GDN/PM/SCO/5 5 of 37 Document Summary Purpose This management procedure was approved by the Engineering Policy Manager, in for use throughout National Grid Gas Users should ensure that they are in possession of the latest edition and related bulletins by referring to the document library of Safety and Engineering documents available on the company Infonet. Compliance with this safety and engineering document does not confer immunity from prosecution for breach of statutory or other legal obligations. Disclaimer This safety and engineering document is provided for use by National Grid Gas and such of its contractors as are obliged by the terms and conditions of their contracts to comply with this document. Where this document is used by any other party it is the responsibility of that party to ensure that this document is correctly applied. Mandatory and Non-Mandatory requirements In this document: Shall: indicates a mandatory requirement (Must: is equivalent of shall in some Networks) Should: indicates best practice and is the preferred option. If an alternative method is used then a suitable and sufficient risk assessment shall be completed to show that the alternative method delivers the same, or better, level of protection Background This document is part of a suite of Management Procedures relating to the Safe Control of Operations that are listed within GDN/PM/SCO/1. Note This document shall be applied throughout the gas industry on Distribution Networks and certain types of Meter Installations. National Grid Gas Transmission (which includes compressor stations and terminals) have their own specific suite of Safe Control of Operations documents (T/PM/SCO/91, 92 & 94). The document reference i.e. GDN/PM/SCO/5 ensures all stakeholders are aware that this document is universal for all work on the Distribution Networks. Copyright 2015 National Grid Gas - All Rights Reserved

6 GDN/PM/SCO/5 6 of Requirement For Formal Written Procedure A routine operational procedure is a formal written document used to control operations that are predominantly, but not exclusively, associated with work on pipe diameters up to and including 12 /300 mm on metallic systems and 355 mm on PE systems on the low pressure system. The procedure specifies what the work is and how it is to be carried out; the personnel, location, mains, timing and required notifications to ensure that there is no conflict with other operations. The documentation describes how the operation will be undertaken and also requires that site specific risk assessments have been completed prior to commencement, that all work will be undertaken in accordance with company safety and engineering procedures and that all site operatives have been briefed prior to starting. Other than following an uncontrolled event i.e. where immediate action is required to prevent imminent danger to life or property, routine operations shall only be carried out with a formal written procedure as identified below. The process flowchart for routine operational procedures is shown on page When to use a Routine Operational Procedure A Selection Chart (Chart 1, see pages 10 & 11) has been developed to assist permitry authors and Authorising Engineers identify and select the appropriate routine or non-routine operational procedure on the basis of the activity being performed. In all cases Authorising Engineers shall assure themselves that the correct operational procedure is being applied. Routine operational procedures other than those listed in the chart may be applied whenever necessary, e.g. when pipeline investigation work may result in the necessity to generate a routine operational procedure in order to complete the operation. 2. Preparation of Routine Operational Procedures The Authorising Engineer shall ensure the safe design and planning of the proposed operation and that written procedures are prepared

7 GDN/PM/SCO/5 7 of 37 in accordance with Safe Control of Operations documentation. For complex or multi phased Routine Operations consideration shall be given to using a Non Routine Operational procedure to manage the work. The template for the production of routine operational procedures is shown in Appendix A, together with detailed instructions for the completion of the boxes within the procedure. The Competent Person appointed to carry out the works or supervise the operation should prepare the routine operational procedure, providing a continuous involvement from conception to completion of the operation. The Authorising Engineer shall ensure that the originators of routine operational procedures have the necessary skills and experience to generate the documentation. The originator of the routine operational procedure shall fully assess the implications of the proposed operation on the following: The need for Permits to Work The need for Network Analysis (as deemed locally by each Distribution Network) Major supply points and other Gas Transporter Networks 2.1. Co-ordination and communication with other parties The Authorising Engineer or originator can liaise with the Network Controller at the planning stage of a routine operational procedure to ensure that relevant current information is obtained to enable correct planning of the proposed works Appointment of Competent Person The Authorising Engineer or originator can liaise with the Network Controller at the planning stage of a routine operational procedure to ensure that relevant current information is obtained to enable correct planning of the proposed works. 3. Authorisation Written procedures shall be authorised by an Authorising Engineer. Authorising Engineers shall carry out a thorough and detailed examination of the proposed work detailed in the procedure,

8 GDN/PM/SCO/5 8 of 37 The Authorising Engineer is accountable for the authorised routine operational procedure including all additional attachments, e.g. network analysis reports, purge calculations, etc. prior to granting their authority Scheduling of Works The Authorising Engineer shall be satisfied that the proposed start/end dates and times are realistic and achievable, to ensure that other proposed works on the network are not unduly affected. Incorrect dates and times have a knock on effect to all other stakeholders associated with the RO and as a consequence any change shall be re-approved by all those involved. In addition any Network Analysis information obtained for such times can be seriously compromised if scheduled dates change Authorising Engineer s conflict check Authorising Engineers are responsible for conflict checking operations that they specifically authorise to ensure their own works do not conflict. Where multiple phased Routine Operations are written to follow a set sequence these shall be carried out in the sequence approved. Any variations to the sequence shall be approved by the Authorising Engineer and if required with the Network Controller and other affected parties Examination and authorisation The Authorising Engineer shall carry out a thorough and detailed examination of the proposed routine operational procedure and then, as appropriate, authorise the procedure. Where necessary, comments shall be added to the documentation or returned to the originator for amendment and resubmission. The authorised procedure shall then be sent to the Network Controller and/or Meter Operations Controller as appropriate. This can be issued in paper or electronic format. If in electronic format this shall be sent via the Authorising Engineers personal company account complete with electronic signature inserted in relevant Authorisation box. The Authorising Engineer is accountable for the authorised routine operational procedure

9 GDN/PM/SCO/5 9 of Amendments to authorised routine operational procedures Refer to Section 8 regarding requirements that allow amendments/deviations to routine operational procedures to be authorised Permitry authorised outside normal working hours In the event that a procedure requires checking for potential conflicting work outside of normal working hours, i.e. that is following an uncontrolled event and the immediate imminent danger has been averted, the Authorising Engineer shall liaise with appropriate Emergency Standby Engineers, or Distribution Network Control Centre (DNCC), etc., to satisfy themselves that no other potential conflicting work is progressing. The Authorising Engineer shall notify the Network Controller of this action at the earliest opportunity and provide the details for the log.

10 GDN/PM/SCO/5 10 of 37 1 Chart 1 - Selection of Non Routine or Routine Operational Procedures ACTIVITY Squeeze off, valve closure, installation of top tees, encirclement fitting [including drilling] [1] 2 Bagging off inc. foam plug 3 Bagging off inc.foam plug 4 Iris Stop 5 Iris Stop 6 Flow Stop 7 Flow Stop 8 Stopple operation 9 Stopple operation Closure of Valve (see row 28 for valve closure under routine maintenance) Closure of Valve (see row 28 for valve closure under routine maintenance) 12 Encirclement fitting [including drilling] [1] [2] 13 Encirclement fitting [including drilling] [1] Main, Service or Pipeline Diameter Range Plastic up to and including 63mm or metallic up to and including 2 /50mm regardless of size of parent main - mains and services Metallic or PE greater than 2 /50mm/90mm up to and including 12 /300mm/355mm - main or service PE greater than 355mm or Metallic greater than 12 /300mm main or service Metallic greater than 3 /75mm up to and including 12 /300mm - main or service Metallic greater than 12 /300mm main or service Metallic greater than 2 /50mm up to and including 12 /300mm - main or service Metallic greater than 12 /300mm main or, service Greater than 2 /50mm up to and including 12 /300mm/355mm - main, service or pipeline Greater than 12 /300mm main, service or pipeline Metallic greater than 2 /50mm up to and including 12 /300mm/355mm - main, service or pipeline Metallic greater than 12 /300mm - main, service or pipeline Metallic greater than 2 /50mm up to and including 12 /300mm - main, service or pipeline Metallic greater than 12 /300mm main, pipeline or service Below 75mb RO NRO NRO Above 75mbar up to 2 bar NRO NRO NRO NRO Above 2 bar up to 7 bar NRO RO NRO NRO NRO NRO NRO 14 Nipple Insertion [1] [2] Any diameter main or service NRO NRO 15 Squeeze off or Stopple on PE pipes Plastic greater than 63mm and up to and including 355mm - main or service Above 7 bar NRO NRO NRO NRO NRO NRO RO NRO NRO NRO NRO NRO NRO NRO RO NRO NRO NRO NRO NRO NRO NRO RO NRO NRO 16 Squeeze off or Stopple on PE pipes Plastic greater than 355mm main or service NRO NRO NRO Closure of Valve (see row 28 for valve closure under routine maintenance) Closure of Valve (see row 28 for valve closure under routine maintenance) Commissioning by direct purging by the [2] controlled use of squeeze off on offtake tee Commissioning by direct purging by the controlled use of squeeze off on offtake tee Connection to stub end [2] (to include controlled purging/commissioning) Connection to stub end (to include controlled purging/commissioning) Plastic greater than 63mm and up to and including 355mm - main or service RO NRO NRO Plastic greater than 355mm main or service NRO NRO NRO Plastic greater than 63mm and up to and including 355mm - main or service Plastic greater than 355mm and up to and including 500mm - main or service Plastic greater than 63mm and up to and including 355mm or Metallic greater than 2 /50mm up to and including 12 /300mm - Main, service or pipeline Plastic greater than 355mm or Metallic greater than 12 /300mm - Main, service or pipeline RO NRO NRO NRO NRO NRO RO NRO NRO NRO NRO NRO NRO NRO

11 GDN/PM/SCO/5 11 of ACTIVITY Connection to valve, nipple or [1] [2] Under pressure tee (to include controlled purging/commissioning via a rider) Connection to valve or [1] Under pressure tee (to include controlled purging/commissioning via a rider) Connection by branch saddle [1] [2] (to include controlled purging/commissioning via a rider) 26 Pressure testing Any other activity which could affect the normal operation of gas handling, storage and pressure controlled installations, telemetered supplies or have an impact upon significant parts of the Network system Valve movement under routine maintenance Main, Service or Pipeline Diameter Range Plastic greater than 63mm and up to and including 355mm or metallic greater than 2 /50mm and up to and including 12 /300mm - main or pipeline Plastic greater than 355mm or metallic greater than 12 /300mm - main or pipeline Plastic greater than 63mm and up to and including 355mm - main or pipeline Refer to Main and Service Laying Management and Work Procedures for MOP up to 7bar Below 75mb Above 75mbar up to 2 bar Above 2 bar up to 7 bar Above 7 bar RO NRO NRO NRO NRO NRO NRO NRO RO NRO NRO NRO NRO NRO N/A NRO NRO NRO NRO Any Size Carried out in accordance with standard routine maintenance procedures and processes to avoid conflict of operations. Where appropriate supported by local RO s or NRO s 29 Hot Works on live pipelines [3] Any Size NRO NRO NRO NRO 30 NOTES Works on the following gas meter installations or works that could affect such gas meter installations Gas meter installations with remotely operable emergency control valves, NTS/LTS meter installations, daily metered supplies, load sensitive supply points and those supply points that have contractual agreements for system enhanced pressures set above the Lowest Operating Pressure Carried out in accordance with standard routine maintenance procedures and processes to avoid conflict of operations. Where appropriate supported by local RO s or NRO s 1. Refers to the diameter of the branch of the under pressure tee or branch saddle fitted. Work includes drilling and commissioning of branch outlet by rider. Where encirclement fittings with branch outlets of up to and including 2 /50mm/63mm diameter for low and medium pressure main and service connections no RO or NRO documentation is required. 2. Where the operation requires a RO, the complete RO shall be forwarded to the Network Controller, with the exception of those indicated [2] and all works on low pressure mains and services up to and including 6 /150mm/180mm diameter, where the minimum requirement is for the front sheet only of the RO to be forwarded to the Network Controller. 3. Hot Work is usually taken to apply to an operation that could include the application of heat or ignition sources to tanks, vessels, pipelines, etc., which may contain or have contained flammable vapour and or involves the emission of toxic fumes from the application of heat, within areas where flammable atmospheres may be present. A Permit to Work covering Hot Works, in association with an NRO where appropriate, will be applied to any welding, brazing, flame cutting, sample scraping or when spark-producing grinding wheels are to be used, this list is not exhaustive and other similar work types could apply. For further guidance refer to Table 1 MISCELLANEOUS NOTES Any decommissioning works associated with the particular activity shall be included within the RO/NRO. Non-standard materials such as PVC or Asbestos will attract the same requirements as metallic mains and services of similar diameters. Non-routine and Routine operational procedures other than those listed may be applied whenever necessary. In all cases Authorising Engineers shall assure themselves that the correct management and work procedures are being applied.

12 GDN/PM/SCO/5 12 of 37 Table 1 The application for permitry in relation to Hot Works activities Criteria for Hot Works application Permit To Work (PTW) NRO Hot Works (PTW) Form Of Authority (FOA) The application of heat or ignition sources to tanks, vessels, pipelines, etc., which may contain or have contained flammable vapour, or in areas where flammable atmospheres may be present i.e. Any burning, welding, flame cutting, grinding, taking sample scrapings etc. Pin brazing Any burning, welding, brazing, flame cutting, grinding on other than live or decommissioned tanks, vessels, pipelines, etc. The emission of toxic fumes from the application of heat Minor Works on Above Ground Installations, Pressure Reduction Stations, Holder Stations or District Governors (not involving excavation works), i.e. repairs to doors, windows, etc. utilising hand held equipment. Visual Inspections, e.g. by civil or environmental persons involving recording via video or camera equipment. See Section 2.1 (GDN/PM/ SCO/2) for other risks to be managed See Section 2.1 (GDN/PM/ SCO/2) for other risks to be managed See Section 2.1 (GDN/PM/ SCO/2) for other risks to be managed See Section 2.1 (GDN/PM/ SCO/2) for other risks to be managed Yes If site hazards are judged to be significant Yes If site hazards are judged to be significant Yes Yes No No Yes No No Yes No No Yes No No No *Yes No No *Yes *Specific attention is drawn to the FOA requirements of Box 2 Hazard identification including Atmosphere Checks and Box 3 in conjunction with The Operational Site General Safety Instructions specifically item 13.(GDN/PM/SCO/2 Appendices C and A)

13 GDN/PM/SCO/5 13 of 37 Flowchart 1 Routine Operational Procedures Does work require an RO procedure? NO Work carried out in compliance with company procedures YES Originator creates RO Is Network Analysis required? YES Obtain Network Analysis NO RO passed to AE for authorisation Originator amends RO AE checks RO and undertake conflict check with own Operations prior to authorising RO returned to originator to amend NO Has RO been authorised? YES Front or full copy of RO passed to Network Controller in accordance with work type and notification periods Network Controller carries out competency, and conflict checks Originator amends RO Does Network Controller provide clearance to proceed? NO RO returned to AE with reasons for rejection YES AE arranges for RO to be passed to CP and briefed before commencement CP signs RO to confirm full understanding of the operation NO Is designated CP on site YES CP completes pre-start checklist for RO Can the work be completed as per the RO? NO Can CP obtain authorisation from AE for deviation to RO? NO CP aborts RO and advises Network Controller of AE s decision YES CP starts job following authorised procedure YES CP records agreed amendment on RO End Is there a need to deviate from any part of the authorise RO? YES Can CP obtain authorisation from AE for deviation to RO? NO CP aborts RO and advises Network Controller of AE s decision NO YES CP completes job CP records agreed amendment on RO Completion logged with Network Controller RO documentation returned to job/project file End

14 GDN/PM/SCO/5 14 of Clearance to proceed 4.1. Authority for clearance to proceed The Network Controller is responsible for providing the final clearance to proceed for the proposed work; this role can be delegated to another member of staff with the Responsible Engineer s approval Notification period to obtain clearance to proceed Authorised routine operational procedures should be submitted for registration and clearance to proceed with the Network Controller/Meter Operations Controller at least 2 working days prior to the start of operations. NOTE: The 2 working days notification period may be reduced by agreement with the Network Controller in the event of an exceptional circumstance. The Authorising Engineer or originator shall liaise with the Network Controller and/or Meter Operations Controller to ensure that all persons affected by the work (e.g. other Gas Transporters, Meter Asset Managers, etc.) are notified and any conflicts identified/resolved in advance of the works, and the opportunity to approve or supply relevant data (e.g. network analysis) has been provided Administration requirements for forwarding routine operational procedures to the Network Controller/Meter Operations Controller Reference should be made to the notes below Chart 1 to determine the requirements for forwarding either the complete routine operational procedure or the front sheet only of the routine operational procedure to the Network Controller/Meter Operations Controller Issue of clearance to proceed The Network Controller/Meter Operations Controller shall issue a confirmation of clearance to proceed to the Authorising Engineer, which should include any relevant comments. Each Distribution Network shall determine the most appropriate methodology to agree this confirmation process, e.g. can be issued in paper or electronic format. If in electronic format this shall be sent via the Authorising

15 GDN/PM/SCO/5 15 of 37 Engineers personal company account complete with electronic signature inserted in relevant Authorisation box. During the period whilst work is being undertaken as part of a procedure, the Authorising Engineer shall have sole operational responsibility for that section of the Network for which he/she has received clearance to proceed with the work. He/she may transfer this responsibility from time to time to a person having the required competencies to authorise the procedure provided the Network Controller has been advised and the acceptability of such persons is confirmed, (e.g. to provide cover during periods of holidays, sick leave, etc. refer to section 7). 5. Notification of Start/End of Works & Cancellation or Deferment 5.1. Start/end of works Once clearance to proceed has been provided for routine operational procedures the Competent Person shall contact the Authorising Engineer, Network Controller/Meter Operations Controller (unless the Distribution Network does not require this action to be taken) prior to commencing work. The work should start within the allotted time frame indicated in box references J1 & J2 (of Appendix A) on the authorised document. Once work has been completed the Competent Person shall contact and inform the Network Controller/Meter Operations Controller and all persons required to be notified under the procedure of the status of the operation, i.e. completed fully, completed partially or aborted. This is to ensure that the network is made available for other work activities Cancellations, deferments and extensions With prior consultation with the Network Controller, the Authorising Engineer shall ensure routine operational procedures are managed and scheduled to take place on the appointed days that they do not conflict with other proceeding work and the integrity and safety of the network are not compromised. Where an operation has been confirmed to take place within a specific time window and is subsequently cancelled, deferred or extended, the Competent Person shall agree the cancellation, deferment or extension with the

16 GDN/PM/SCO/5 16 of 37 Authorising Engineer and as appropriate, provide Network Analysis in support of the rearranged dates. At least 2 working days notification should be provided to allow the Network Controller to reassess the operation and reissue a valid Clearance to Proceed. For deferments or extensions, confirmation shall be given from the Network Controller/Meter Operations Controller that any re-arranged dates are acceptable and the outlined work does not conflict with other Network operations. All others involved in the operation should be advised as soon as possible. The Network Controller will not allow any cancellations, deferments or extensions unless the person reporting confirms that the Authorising Engineer is aware of the status of the works. The Network Controller will log all details on the management system. 6. Permits to Work A permit to work should be used where necessary in support of the routine operational procedure. Refer to GDN/PM/SCO/2 Management Procedure for Safe Control of Operations Issue Of Permits To Work And Forms Of Authority On The Network It is also advisable to use a permit to work when two or more individuals or groups of people, perhaps from different disciplines, contractors or organisations who are undertaking work on the network or meter installations, need to co-ordinate their activities to ensure their work is completed safely. This should apply equally when there is a transfer of work and responsibilities from one group to another. Where a permit to work is required, this should be indicated in Box M within the written procedure. 7. Change of Authorising Engineer or Competent Person 7.1. Change to Authorising Engineer If the Authorising Engineer will be unavailable whilst the routine operational procedure is undertaken, e.g. due to annual leave, they shall transfer the responsibility and brief another suitable Authorising Engineer on the proposed operation. All relevant copies of documentation shall be updated to reflect the change of

17 GDN/PM/SCO/5 17 of 37 Authorising Engineer, requiring the replacement AE to sign off the RO, with the Competent Person informed and provided with the revised contact number for the replacement Authorising Engineer. The Network Controller shall also be informed of the change to verify the competency of the replacement AE is suitable for the proposed works and a copy of the amended front sheet of the authorised RO shall be forwarded to the Network Controller Change to Competent Person If the Competent Person is unable to start/continue the work for any reason, e.g. due to illness, the Authorising Engineer shall nominate and arrange for the new Competent Person to be briefed regarding the proposed works and provided with a copy of the authorised and cleared to proceed documentation. The routine operational procedure shall be endorsed with the name of the new Competent Person and be signed to confirm acceptance. The replacement Competent Person should be notified to the Network Controller before work starts to check the nominee s SCO registration/competence check for carrying out the work. If it is impracticable for the competence check to be carried out prior to the Competent Person starting, i.e. changeover occurred outside normal office hours, the Network Controller should be informed as soon as reasonably practicable. All procedure recipients should be advised of the changed responsibilities. In cases where work is continuous, e.g. working shifts, there may be a need for more than one Competent Person. A local procedure shall be developed for this situation, which will call for the Competent Person to be clearly identified on the permitry with appropriate precautions including the handover process Hand over (Delegated Authority) For any circumstance as described in sections 7.1 and 7.2 that leads to a delegation of authority for a change to AE or CP, a full hand over process shall be undertaken to ensure the nominated person has full knowledge and understanding of the operation that he/she is to manage. All associated documentation shall be both

18 GDN/PM/SCO/5 18 of 37 clear and concise to ensure effective control throughout i.e. fit for purpose 8. Deviations from Routine Operational Procedures 8.1. Deviations prior to or after starting routine operational procedures Prior to starting or once started a routine operational procedure, if the Competent Person identifies that the authorised procedure is not consistent with on-site conditions so as to necessitate ANY departure from the authorised procedure, work on the procedure shall not start or should stop or be aborted. This includes any changes to the sequence of multiple phased Routine Operations. The Competent Person shall immediately contact the Authorising Engineer and appraise them of the situation. The Authorising Engineer is allowed to make amendments to the permitry. The Authorising Engineer shall use his/her engineering judgement to approve a deviation from the written permitry or abort the works. Work shall not start or restart until the Authorising Engineer has agreed and authorised any changes. If it should be necessary to depart from the authorised procedure, a full record of the agreed actions to be taken shall be clearly written on the procedure document. The Competent Person has no authority to deviate from the authorised Routine Operational procedure unless the Authorising Engineer has granted authority The Competent Person / Authorising Engineer has no authority to deviate from engineering procedures It is the responsibility of the Authorising Engineer to ensure that the impact of any proposed amendments on safety and security of supply are fully assessed and that the Competent Person has a clear understanding of the agreed procedural changes. In particular, where the Authorising Engineer determines that the necessary changes can be agreed and authorised verbally 'off site' the agreed actions shall be read back to the Authorising Engineer and explicitly understood by both the Competent Person and the Authorising Engineer before the operation restarts. A copy of the final annotated procedure should be forwarded to the Authorising Engineer for review on completion of the operation. Where an immediate controlled solution to the change in site circumstances is not practicable, or the procedure needs to be significantly rewritten, the Authorising Engineer should abort the operation.

19 GDN/PM/SCO/5 19 of 37 Where the work cannot be undertaken in accordance with current engineering procedures, the Authorising Engineer should refer the matter in accordance with the current deviation process. Any urgent requirement for authorisation to deviate from engineering procedures shall be referred to an operational senior manager and be supported by a comprehensive risk assessment.

20 GDN/PM/SCO/5 20 of Prior to Starting Routine Operational Procedures 9.1. Briefing of routine operational procedures Where the Competent Person is not the originator of the procedure, or where the procedure has been authorised and additional comments included, these shall be briefed to the Competent Person so that they fully understand the proposed operation. It is the Authorising Engineer s responsibility to ensure that this is done. The Competent Person shall satisfy him/herself that all personnel involved are competent to undertake the tasks assigned to them, and ensure that they have a clear understanding of both the proposed operation and their own role Inconsistency between routine operational procedure and on-site conditions If the Competent Person identifies that the authorised procedure is not consistent with on-site conditions refer to Section 8 Deviations from Routine Operational Procedures Competent Persons acknowledgement of proposed operation 9.4. Checklist On receipt and briefing of the authorised procedure, the Competent Person shall sign the procedure (refer to Appendix A1 Box O ) to confirm that they fully understand the proposed operation and that they have all the relevant documentation, including Clearance to Proceed, associated with the procedure in their possession. The Clearance to Proceed must be held on site, this can be in paper or electronic format. The only exception being in the event of an emergency where immediate action is required refer to guidance in GDN/PM/SCO1 Section 4.6 Emergency Actions. Prior to starting the RO, the pre-start check list (Appendix C) shall be completed and a copy left with the RO procedure. All preliminary work should be specified, i.e. preparation of excavations, pressure, purge and vent points connections, purge calculations, anchorage calculations, etc., as appropriate. Prior to work starting, the Competent Person shall confirm that: a) All necessary preparatory work has been completed

21 GDN/PM/SCO/5 21 of 37 b) All necessary materials, tools, equipment and personnel are on site c) Communications are functional prior to starting and during the works and all personnel involved in the operation have been briefed on their duties d) Valves to be operated have been clearly identified e) The gas supply position, valve status, governors, holders and pressure regimes are all in accordance with the procedure assumption f) All appropriate checks have been completed to validate the network against the proposed work and any minimum system pressures are available g) Where appropriate all supply points shall have been identified and notified of the work h) The impact of the procedure on any large gas meter installation has been assessed i) The requirements of any Permit To Work are met j) By contact with those who gave them, that all approvals are still valid; and k) Any other appropriate requirements satisfied. After completion of the actions listed above, the Competent Person should notify all persons who wish to be notified under the procedure.

22 GDN/PM/SCO/5 22 of Execution of Routine Operational Procedures Attendance of Competent Person on-site The Competent Person in control of the operation shall be on site during the operation and supervise their execution, unless and with the approval of the Authorising Engineer. Where the CP is unsure of the need to attend a Routine operational site during a specific task or time period of the operation they shall contact the Authorising Engineer for confirmation. NOTE: Control can be as effectively exercised from elsewhere, e.g. Distribution Network Control Centre or a communications centre, or by other nominated supervision indicated on the routine operational procedure." Changes of circumstances during the routine operational procedure 11. Completion Once the operation has started, if the Competent Person identifies that circumstances have changed, so as to necessitate ANY departure from the authorised procedure, work on the procedure should stop or be aborted. Refer to Section 8 Deviations from routine operational procedures above. On completion, the Competent Person shall ensure that: a) The status of valves are all in accordance with the state agreed at the outset of the procedure b) Any pressure recorder/logger affected has been inspected c) The Network Controller and all persons required to be notified under the procedure have been informed of the status of the operation, i.e. completed fully, completed partially or aborted d) These confirmations are noted in Comments on Completion section. (Refer to Box X3) The duties specified above may be delegated to another person only with the permission of the Authorising Engineer.

23 GDN/PM/SCO/5 23 of 37 On completion of the operation a copy of the procedure signed by the Competent Person should be filed in the project file (where applicable) or returned to the Authorising Engineer. A sketch of the completed work should also be included to enable accurate records to be maintained.

24 GDN/PM/SCO/5 24 of 37 Appendix A Routine Operational Procedure Template A. Network Identifier: B. Organisation: C. Project / 3 rd Party Ref.: D. RO Number: E. Originator: (Print Name) F. Date raised: G. Location of work: G1. Post Code: H. Map References: Start: E: N: End: E: N: I. Outline of objectives: J 1. Start date/time: J 2. End date/time: K. Details of effect on gas supplies / other Gas Transporter networks / meter installations: Network Validation Checks Required: YES/NO (if YES attach results) L. Long term plant/mains Start outage date/time: M. Permit to Work Specify PTW YES/NO required number(s): N. Preparatory work (Provide details in method statement below) Will any customers be affected? Have they been notified? Is a pressure decay test required? End date/time YES/NO YES/NO/Not Applicable O. Prior to commencing work confirm that an on-site specific risk assessment has been completed and that the work site is set out in accordance with above objectives, company safety and engineering procedures. P. Prior to commencing work confirm that all site operatives have been briefed on their roles and responsibilities associated with these works: Q. Purge details/calculations (add supplementary sheets if required): Decommissioning Detail: Commissioning Details: YES/NO CP Initials: R. Pipeline PON: PON: PON: details Existing main size: length: size: length: size: length: New main size: length: size: length: size: length: Bypass size: length T. Authorising Engineer comments: Rider size: length: Purge Vents size: length: S. Pressures mbar Minimum allowable pressure required during operation to be inserted prior to authorisation Actual pressure at start of operation Actual Pressure at end of operation AE Tel. Contact No: U. Name (Print): Signature: Date: Authorising Engineer Authorised by: Network Controller Clearance to Proceed: Competent Person undertaking the work: Note: If Authorising Engineer or Competent Person changes, contact Network Controller for a revised clearance to proceed. If it s the Authorising Engineer forward front copy of RO to Network Controller. V. Method Statement shall be attached: GAS ESCAPE CALL

25 GDN/PM/SCO/5 25 of 37 ROUTINE OPERATIONAL PROCEDURE W. Enclosures (include all appropriate OS maps, schematic/spider drawings, Network Analysis profiles, purge calculations, etc): Routine Procedure No: 3 rd Party Reference No./Project No: W1. Pre start checklist for RO attached (tick) Yes No X1. Sketch of proposed Operations (If required insert an intermediate sketch Note: If sketch is inconsistent with site conditions, contact AE prior to starting as procedure may be aborted X2. Sketch of completed Operations X3. Comments on completion Y. Operation Complete C.P. Name (print): Signature: Date: Date and time Network Control informed and by whom Signature Time Date Version 2.1

26 GDN/PM/SCO/5 26 of 37 Appendix A1 - Instructions for completing a routine operational procedure The routine operational procedure shall be completed in accordance with the following instructions: All sections and boxes of the routine operational procedure shall be endorsed with the relevant data, otherwise, N/A if not required. (Refer to Appendix A). Box A Network Identifier This can be used for a local reference, e.g. local gas distribution network number. Where Network operators personnel or their contractors raise the procedure, the initiator shall complete this box. Utility Infrastructure Providers (UIP) and other Gas Transporters can enter this number if known. If the number is not known, the box should be left blank for completion by the Network Controller. Box B Organisation The name of the organisation that is undertaking the operation, e.g. the contractor or UIP. Box C Project /3rd Party Reference The reference number for the National Grid Gas project, or the associated 3rd Party reference number Box D RO Number The reference number given to the originator by the Network Controller. Box E Originator The name and telephone number of the person who is producing the written procedure. Box F Date raised The date that the originator produces the written procedure. Box G Location and Postcode The name of the road, town and postcode where the work is being undertaken, if applicable. The exact location should be provided where possible e.g. Outside No. 56 High Street or at the junction of High Street and North Road. Alternatively if a section of main is being replaced give the start and end locations, e.g. Outside No. 12 High Street to No. 116 High Street. Where the works location has parallel mains you shall identify which one is being worked on, e.g. where there are same diameter, same pressure tier parallel mains you shall indicate which main by referencing for instance the main located on the side of the even houses on the street, or the most northerly main, etc. Box G1 Blank box left for Distribution Network specific requirements Box H Map Reference Eastings and Northings Place cursor on Maps system at the start and end locations (where applicable) of the work to obtain the correct references. Where work involves trenches or mains are to be inserted, etc. you shall identify the correct Eastings and Northings references for each end of the works and branches off to enable the correct location to be identified. Box I - The outline of objectives This should detail the actual work to be done, techniques to be applied and the material, diameter and pressure limits of the mains. The detail should identify lengths

27 GDN/PM/SCO/5 27 of 37 of main to be commissioned or abandoned. For example bag off, decommission and abandon 90m section of 10 CI LP main and carry out dead insertion with 90m of 180 mm PE, and tie-in with in-line connections following pressure test, commission and transfer 16 services. Boxes J1 and J2 Start and end dates and times This information is essential for the management of the network and ensuring there is no conflict with other operations. The procedure shall not be authorised unless the document is endorsed with the appropriate information. The Authorising Engineer shall be satisfied that the proposed start/end dates and times are realistic and achievable, to ensure that other proposed works on the network are not unduly affected. Note: To minimise the impact on the Network Controller s workload it is essential that these proposed planned dates are as realistic and achievable as possible to reduce the volume of date changes, (which does led to delays in other works been cleared and checked). Box K The effect on gas supplies This box should detail if flow stopping is to occur, if gas is to be directed via bypasses or flow in different directions, if pressures may be reduced and if there are programmed user shut downs. This should include the requirement to complete network validation checks at the planning stage. Any network analysis report shall be appended to the routine operational procedure. The effect on other Gas Transporter networks should also be identified. Other factors to be taken into account should include new connections, 3rd Party connections, reduction in system capacity due to insertion works, reconfiguration of supplies etc. Where originators and Authorising Engineers have access to digital geospatial data they shall identify any other Gas Transporter (GT) site that may be affected by the proposed routine operation procedure. Each DN/IGT will have their own protocols in identifying asset infrastructure, for example these can be identified by pink shaded polygons on screen, which identify the boundary of the existing GT site and provides their contact details, which shall be inputted onto the routine operational procedure. In addition to the polygon identifier, certain GT sites will have the approximate line of the approach mains indicated by a series of crosses along the route of the pipe, the name of the GT shall be added at regular intervals along the indicated route, e.g. xxxxxxxxx Gas Technology Ltd xxxxxxxxx, (further information is captured in T/PM/DR/23 - Management Procedure for Pipe Asset Record Update and Validation). It is possible that some sites may not have a polygon or connection point associated with them and as such due caution shall be exercised when planning work in areas where another GT's plant may be present or affected by the operation. Authorising Engineers shall take into account the number of service connections/meter installations to be connected/purged to ensure that they have the appropriate resources in place. Box L - Long Term Plant Outage The duration of any plant, mains/pipeline outages as a result of the routine operational procedure should be detailed, i.e. mains decommissioned to allow insertion work or governor replacement, etc. Any subsequent re-commissioning would normally be subject to a further written procedure.

28 GDN/PM/SCO/5 28 of 37 Box M - Permit to Work required Confirm whether a Permit to Work is required. Reference should be made to GDN/PM/SCO/2 - Issue of Permit to Work or Form of Authority, to identify specific work activities that require a Permit to Work in addition to the routine operational procedure. Box N - Preparatory Work Confirmation of any preparatory work required. Include/attach all relevant documentation associated with the procedure. Identify if any customers will be affected. Confirm if they have been notified or not or not applicable. Confirm if a pressure decay test will be required. Box O - On-site risk assessment Prior to commencing work the Competent Person shall confirm that an on-site specific risk assessment has been completed and that the work site is set out in accordance with company safety and engineering procedures. The Competent Person should use the pre start checklist in Appendix C. The Competent Person has to initial this box to confirm this has been complied with. Box P Confirmation of site briefing Prior to commencing work the Competent Person shall confirm that all site operatives have been briefed on their roles and responsibilities associated with these works: The Competent Person has to initial box to confirm this has been complied with. Box Q - Purge Details/Calculation Purge calculation details should be shown for decommissioning and/or commissioning operations. These can be inserted here or attached to the procedure or suitably referenced by work procedures, which are available to the Competent Person on-site - state which in boxes or N/A if appropriate. Box R - Pipeline Details Where available insert the specific Pipe Object Number(s) (PON) reference for the pipeline(s) being worked on. This enables the Network Controller to specifically identify the actual pipes to be worked upon. Insert the diameter(s) and length(s) of the existing and new main. Bypass details refer to any temporary bypass required to maintain adequate gas flows/pressures within the network whilst a flow stopping operation is carried out. Rider details refer to any temporary rider used for commissioning/purging purposes. Purge Vent sizes refer to the size and lengths of the purge vents to be used. Box S - Pressures Insert the minimum allowable pressure required during the operation prior to authorisation of the RO. The Competent Person shall insert the pressures recorded at both the start and end of the operation. Box T - Authorising Engineers Comments The Authorising Engineer shall make appropriate comments/checks, which should be understood and acknowledged by the Competent Person. The final version of the procedure shall be authorised by the Authorising Engineer and then sent to the Network Controller for appropriate conflict checks/clearance to proceed. Also include