30125034 pdf BRITISH STANDARD BS EN 14678 2 2007 LPG equipment and accessories — Part 2 Components other than dispensers and installation requirements ICS 75 200 Construction and equipment for perform[.]
BRITISH STANDARD LPG equipment and accessories — Construction and performance of LPG equipment for automotive filling stations — Part 2: Components other than dispensers and installation requirements ICS 75.200 BS EN 14678-2:2007 +A1:2012 BS EN 14678-2:2007 +A1:2012 National foreword This British Standard is the UK implementation of EN 14678-2:2007+A1:2012 It supersedes BS EN 14678-2:2007, which is withdrawn The UK participation in its preparation was entrusted to Technical Committee PVE/19, LPG containers and their associated fittings A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2007 © The British Standards Institution 2012 Published by BSI Standards Limited 2012 ISBN 978 580 75820 Amendments/corrigenda issued since publication Date Comments 31 March 2012 Implementation of CEN amendment A1:2012 EUROPEAN STANDARD EN 14678-2:2007+A1 NORME EUROPÉENNE EUROPÄISCHE NORM February 2012 ICS 75.200 Supersedes EN 14678-2:2007 English Version LPG equipment and accessories - Construction and performance of LPG equipment for automotive filling stations Part 2: Components other than dispensers and installation requirements Équipements pour GPL et leurs accessoires - Équipements devant être utilisés dans les stations-service GPL Partie : Composants autres que les distributeurs, et exigences d'installation Flüssiggas-Geräte und Ausrüstungsteile - Bau- und Arbeitsweise von Flüssiggas-Geräten für AutogasTankstellen - Teil 2: Bauteile, außer Zapfsäulen, und Anforderungen an die Aufstellung This European Standard was approved by CEN on 11 August 2007 and includes Amendment approved by CEN on 26 December 2011 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 14678-2:2007+A1:2012: E BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions 5 4 4.1 4.2 4.3 4.4 4.5 4.5.1 4.5.2 4.6 4.6.1 4.6.2 4.6.3 4.6.4 4.7 4.7.1 4.7.2 4.7.3 4.8 4.8.1 4.8.2 4.8.3 4.9 4.9.1 4.9.2 4.9.3 4.10 4.10.1 4.10.2 4.10.3 4.11 4.11.1 4.11.2 4.12 Requirements 6 General 6 Design pressure .7 Design temperature .7 Materials 7 Corrosion protection .7 General 7 Cathodic protection .8 Storage !pressure vessel" " 8 Design .8 Installation 9 Equipping .9 !Pressure vessel" " protection 9 Pumping units 9 General 9 Submersible pump .9 External pump 10 Dispensers 10 General 10 Dispenser protection 10 Pipe and hose break protection 10 Pipe-work and connections 10 Pipe-work 10 Pipe joints and connections 11 Jointing compounds 11 Valves and pressure indication 11 Shut-off valves 11 Hydrostatic relief valves 12 Pressure indication 12 Electrical installation 12 General 12 Emergency Shut Down system (ESD) 12 Permanent remote assistance 13 5 Signs 13 6 6.1 6.2 6.3 Testing of the installation 13 Pressure test 13 Leak test 13 Test interpretation 14 7 Commissioning of the installation 14 Annex A (informative) Explanatory drawings 15 Bibliography 19 BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) Foreword This document (EN 14678-2:2007+A1:2012) has been prepared by Technical Committee CEN/TC 286 “Liquefied petroleum gas equipment and accessories”, the secretariat of which is held by NSAI This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2012, and conflicting national standards shall be withdrawn at the latest by August 2012 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document includes Amendment approved by CEN on 2011-12-26 This document supersedes EN 14678-2:2007 The start and finish of text introduced or altered by amendment is indicated in the text by tags !" EN 14678, LPG equipment and accessories — Construction and performance of LPG equipment for automotive filling stations consists of the following parts: Part 1: Dispensers Part 2: Components other than dispensers, and installation requirements According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) Scope This European Standard covers the installation requirements, on fixed LPG filling stations and on multi-fuel filling stations, for the automotive LPG equipment and components, which are required to safely dispense automotive LPG This European Standard does not cover on-site and off-site safety distances NOTE Users of this European Standard should be aware that National regulations may be in place covering all or some of the requirements of this European Standard National regulations over-ride any requirement in this European Standard in the states where they apply Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water — Part 2: Non-hardening jointing compounds EN 751-3, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water — Part 3: Unsintered PTFE tapes EN 837-1, Pressure gauges — Part 1: Bourdon tube pressure gauges — Dimensions, metrology, requirements and testing EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges EN 1983, Industrial valves — Steel ball valves EN 10226-1, Pipe threads where pressure tight joints are made on the threads — Part 1: Taper external threads and parallel internal threads — Dimensions, tolerances and designation !EN 12542, LPG equipment and accessories — Static welded steel cylindrical tanks, serially produced for the storage of Liquefied Petroleum Gas (LPG) having a volume not greater than 13 m³ — Design and manufacture" !EN 13445 (all parts), Unfired pressure vessels" EN 13463-1, Non-electrical equipment for potentially explosive atmospheres — Part 1: Basic methodology and requirements CEN/TS 13547, Industrial valves — Copper alloy ball valves EN 13709, Industrial valves — Steel globe and globe stop and check valves EN 13789, Industrial valves — Cast iron globe valves EN 14570, Equipping of LPG tanks overground and underground EN 14678-1:2006, LPG equipment and accessories — Construction and performance of LPG equipment for automotive filling stations — Part 1: Dispensers BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) EN 15257, Cathodic protection — Competence levels and certification of cathodic protection personnel EN 60079-10, Electrical apparatus for explosive gas atmospheres — Part 10: Classification of hazardous areas (IEC 60079-10:2002) Terms and definitions For the purposes of this document, the following terms and definitions apply !3.1 Liquefied Petroleum Gas LPG one or more light hydrocarbons which are assigned to UN 1011, UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane, butane isomers, butene with traces of other hydrocarbon gases NOTE For automotive LPG specification see EN 589." 3.2 non-return valve !valve designed to close automatically to restrict reverse flow" 3.3 excess flow valve valve designed to close automatically, with a small residual flow, when the fluid flow passing through it exceeds a predetermined value, and to re-open when the pressure differential across the valve has been restored below a certain value 3.4 pressure relief valve self-closing valve which automatically, without the assistance of any energy other than that of the vapour concerned, discharges vapour at a predetermined pressure, and operates with a pop action 3.5 hydrostatic relief valve !self-closing valve which automatically, without the assistance of any energy other than that of the fluid concerned, discharges fluid at a predetermined pressure" 3.6 shear valve normally open valve activated by impact, which closes both sides of the break point to prevent flow and remains closed after activation 3.7 shut-off valve valve to provide a leak-tight seal which is operated either manually, remotely or is self-closing 3.8 contents gauge !device to indicate the liquid level or contents in a pressure vessel" 3.9 !mounded vessel pressure vessel above or partially underground of which the part above the ground is completely covered" 3.10 !underground vessel vessel below the surrounding ground level and completely covered" BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) 3.11 !overground vessel pressure vessel above the surrounding ground level and not covered" 3.12 submersible pump pump which is completely or partially immersed in the liquid LPG 3.13 external pump pump which is installed on the LPG delivery pipe-work 3.14 hazardous area !area in which an explosive atmosphere is or may be present, in a quantity such as to require special precautions for the construction and installation of equipment and use of apparatus" 3.15 dispenser delivery and measuring unit for LPG in the liquid phase (see EN 14678-1) 3.16 breakaway coupling coupling which separates at a predetermined section when required and each separated section contains a self closing shut-off valve which seals automatically 3.17 break point weakened section in a pipe or fitting intended to break when excessive force is applied 3.18 installer person or organization who, by qualification, training, experience and resources assumes technical responsibility for the installation of an LPG filling station !3.19 unattended filling station self-service filling station that is not supervised by on-site personnel" !3.20 pressure vessel assembly of the pressure-retaining envelope (including the openings and their closures) and non-pressureretaining parts attached directly to it" 4.1 Requirements General The design of the installation shall take into account stresses resulting from internal and external loads such as pressure, thermal expansion, contraction and vibration The installer shall be provided with a drawing of the layout of the installation on which the hazardous areas are shown including their classification in accordance with EN 60079-10 Only components suitable for the selected hazardous area shall be installed All components required for operational and emergency purposes shall be easily accessible BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) All remotely operated shut-off valves shall be of the normally closed type All equipment and components shall be installed according to the manufacturer’s instructions and tested according to the procedures described in Clause and Clause Overground equipment shall be: secured to prevent excessive movement of pipes; located to reduce the possibility of impact damage from vehicles or mobile equipment; protected with bollards or barriers, where necessary 4.2 Design pressure The design pressure for the parts subject to pressure, other than the !pressure vessel" and its pressure relief valve, shall be at least 500 kPa (25 bar) 4.3 Design temperature The maximum design temperature shall be + 40 °C The minimum design temperature shall be – 20 °C For operating conditions outside the above range, different design temperature(s) shall be agreed with the manufacturer and suitably marked 4.4 Materials Materials in contact with LPG shall be compatible with automotive LPG Materials exposed to corrosive environments shall be corrosion resistant or protected against corrosion Other materials used shall meet the design requirements of this European Standard Non-conductive materials exposed to potentially explosive atmospheres, which are susceptible to electrostatic charge, shall comply with EN 13463-1 NOTE Further information on electrostatics is given in CENELEC Report CLC/TR 50404 All elastomeric materials in contact with LPG shall be compatible with automotive LPG and shall not distort, harden or adhere to other components to such an extent as to impair the function of those components Rubber materials shall conform to EN 549 NOTE For guidance see EN ISO 11114-2 4.5 Corrosion protection 4.5.1 General 4.5.1.1 Pipe-work, pipe fittings and components shall be constructed from materials which shall not be degraded by the external environment in which the material is used (e.g be corrosion resistant) or protected with a suitable coating 4.5.1.2 For underground pipe-work, coatings in accordance with EN 12068 are acceptable cathodic protection shall be applied if not otherwise adequately protected, see 4.5.2 Additional BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) 4.5.2 Cathodic protection Cathodic protection of buried piping shall be applied to reduce the risk of aggressive localised corrosion at points where the protective coating is or could become defective Protection shall be either by the connection of sacrificial anodes or the use of an impressed current Protection shall be applied as soon as practicable after installation Attention shall be given to the risks of pick up from stray earth currents and possible interaction with other local electrical networks Electrical connections to pipe-work shall be through the use of fully welded pads compatible with the material of the pipe Direct electrical connection to the pipe wall by means of clamping shall not be permitted Cathodic protection is recommended when: specific resistivity of the soil at the installation area is less than 100 Ohm⋅m, or sand used to cover the pipe-work has a specific electrical resistivity of less than 100 Ohm⋅m, or stray currents are likely to occur, for instance in the vicinity of high-voltage lines and electric railways or tramways The specific resistivity of the soil shall be established by a competent person as defined by EN 15257 The cathodically protected components shall be electrically insulated from earthed objects There shall be electrical continuity for all buried pipework covered by the cathodic protection system NOTE Flanges and other in line components may require specific continuity connections The electrical resistance of the insulators used for this purpose, measured above-ground, shall be at least 100 000 Ohms The cathodic protection shall supply a potential of at least -850 mV to the component to be protected, referred to a Cu/CuSO4 reference cell In anaerobic soils, the potential shall be -950 mV The measuring point of the cathodic protection shall be in the form of a measuring post or above-ground measuring box The cathodic protection shall be checked for proper functioning prior to commissioning of the installation 4.6 4.6.1 Storage !pressure vessel" " Design Overground !pressure vessels" with a volume of 13 m or below shall be designed and manufactured in accordance with EN 12542 or equivalent Underground and mounded !pressure vessels" with a volume of 13 m or below shall be designed and manufactured in accordance with !EN 12542" or equivalent !Pressure vessels" with a volume greater than 13 m shall comply with EN 13445 or equivalent BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) 4.6.2 Installation Unless otherwise specified by the !pressure vessel" manufacturer, 0,3 m of clean sand, free of stones and sharp particles, shall be used to surround and cover underground or mounded !pressure vessels" Where sand is used, the particle diameter and chemical properties shall be selected not to cause damage to the !pressure vessel" and its ancillary equipment NOTE Sand with a particle diameter of mm is considered as suitable for this application Utilisation of sand with a particle diameter less than mm should take into account that it may be washed away, migrating into the surrounding ground In this case proper protection should be provided (e.g by means of concrete bed and side walls) The storage !pressure vessel" shall be installed either above ground, underground or mounded in a fixed position See Annex A for installation examples Adequate provisions shall be taken to avoid movement of the !pressure vessel" in respect to the surrounding ground 4.6.3 Equipping All storage !pressure vessels" shall be equipped in accordance with EN 14570 The following functions are also mandatory for installations covered by this European Standard: vapour return when required by dispenser design; drainage; and pressure indication 4.6.4 !Pressure vessel" " protection Adequate means shall be provided to protect the !pressure vessel" and ancillary components from vehicle impact 4.7 4.7.1 Pumping units General External or submersible pumps are permitted See Annex A for installation examples Precautions shall be taken so that under no circumstances will the pump pressure exceed the maximum design pressure of the installation NOTE This can be achieved by installing a by-pass system that discharges into the !pressure vessel" from which the pump is operating 4.7.2 Submersible pump Where a submersible pump is used the !pressure vessel" design shall allow for removal of the submersible pump, in accordance with the pump manufacturers recommendations, with minimal loss of !pressure vessel" contents NOTE If no isolating barrel has been installed, the !pressure vessel" may have to be emptied before any exchange of the pump BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) 4.7.3 External pump External pumps shall be in accordance with EN 13463-1 4.8 4.8.1 Dispensers General Dispensers shall be in accordance with EN 14678-1 or equivalent 4.8.2 Dispenser protection The dispenser shall be protected from vehicle impact by means of location or mechanical protection, see 4.1 4.8.3 Pipe and hose break protection The pipeline upstream of the breaking point shall be rigidly fixed to withstand a bending moment of at least 000 Nm Where the design of the breakaway coupling requires the inlet side to be permanently fixed to the ground or dispenser frame, the connection to the ground or dispenser frame shall withstand a force of at least 750 N in the drive-away direction 4.9 4.9.1 Pipe-work and connections Pipe-work Underground pipe-work shall be placed at least 0,6 m below ground level on a bed of clean sand LPG pipe-work shall be surrounded by a minimum of 0,2 m of clean sand Clean sand used to cover and lay pipe-work on shall be free of stones and sharp particles Clean sand shall have a particle diameter and chemical properties selected not to cause damage to the pipe-work NOTE Sand with a particle diameter of mm is considered as suitable for this application Utilisation of sand with a particle diameter less than mm should take into account that it can be washed away, migrating into the surrounding ground In this case proper protection should be provided (e.g by means of concrete bed and side walls) Where LPG pipe-work is installed in a sleeve, provisions shall be taken so that no LPG can flow from the dispenser or pump to areas where the mixture may be ignited The distance between two pipes in the same trench shall be at least 0,10 m Marker tape shall be placed a minimum of 0,30 m above the pipes Provisions shall be made to enable de-gassing of components or a group of components e.g filters, pumps, dispensers, pipe-work to allow for maintenance purposes NOTE This can be achieved by installing shut-off valves and a purge valve upstream and downstream of the component(s) In order to prevent damage to the LPG pipe-work due to system vibration or pressure shocks, pipes shall be placed so that they cannot come into contact with any object or structure that could cause abrasion 10 BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) 4.9.2 4.9.2.1 Pipe joints and connections General Joints in underground steel pipe-work shall normally be welded; where underground flanged or threaded connections are necessary, inspection access shall be provided The construction of pipe connections shall be designed so as to prevent excessive mechanical stresses on the tank, pipes or components due to subsidence Pipe sizes above DN 50 shall be welded or flanged Threaded joints up to DN 80 are permitted for connections to auxiliary components such as pumps, meters, filters etc if flanging is not possible Pipe sizes DN 50 and below connected by threaded joints shall be of the thick wall specification pipe type Threaded connections shall be tapered in accordance with the requirements of EN 10226-1 Parallel threads are not permitted for sealing purposes unless they are part of a specific component fitting Compression type ferrule or equivalent fittings shall only be used in conjunction with corresponding tubes Care shall be taken to ensure the internal cleanliness of the pipe-work system before commissioning of the installation 4.9.2.2 Flanges Pressure rating of flanges shall at least be equal to the design pressure Flange connections shall be constructed to prevent blow-out of seals or gaskets Welding flanges shall comply with the requirements of EN 1092-1 NOTE Weld-neck flanges should preferably be used to avoid difficulties, which may be encountered with other types of flanges, where non-destructive testing is required NOTE Flanged joints should be positioned to minimize the effects of LPG impingement on !pressure vessels" and equipment in the event of leakage at the joint 4.9.2.3 Seals and gaskets Non-metallic seals and gaskets shall be suitable for LPG NOTE 4.9.3 See EN 549 and EN ISO 11114-2 Jointing compounds Jointing compounds and tapes for threaded connections shall be suitable for use with LPG and be in accordance with EN 751-2 and EN 751-3 as appropriate Red lead and hemp shall not be used 4.10 Valves and pressure indication 4.10.1 Shut-off valves Where ball valves or globe valves are installed in pipe-work these shall be in accordance with EN 1983, CEN/TS 13547, EN 13709, or EN 13789 11 BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) 4.10.2 Hydrostatic relief valves Where liquid LPG may be trapped between two closed valves a hydrostatic relief valve with a maximum set pressure which is not greater than the design pressure shall be installed Hydrostatic relief valves shall discharge into a ventilated area The location and positioning of hydrostatic relief valves shall be such that: discharging liquid will not impinge on !pressure vessels" or other parts of the installation; obstruction by debris (e.g caused by installation in the lower section of the pipe-work) will not compromise its operation Hydrostatic relief valves shall be provided with protective caps to prevent ingress of water or any pollution (i.e rain cap) and shall indicate the opening of the valve itself 4.10.3 Pressure indication Means shall be provided to verify the system pressure down stream of the pump Where a pressure gauge is installed it shall be in accordance with EN 837-1 4.11 Electrical installation 4.11.1 General All components shall be earthed except for components, which are cathodically protected Electrical and electronic components shall be suitable for the zone in which they are fitted Electrical cables used in hazardous areas shall comply with 4.1.3 of EN 14678-1:2006 Where cables are placed in a tube or pipe provision shall be made to ensure that LPG cannot flow along the conduit to another area where the mixture may be ignited, e.g from the dispenser or pump to sales area The means of introduction of cables or ducts with their individual glands, bushings etc., into an enclosure shall ensure that the degree of protection is not reduced Seals and sealants used for closing conduits shall be impermeable to LPG in liquid or vapour phase To minimize the risk of electrostatic discharge during tanker deliveries, an effective earthing point shall be provided near the filling point of the storage !pressure vessel" NOTE Considerations should be given to the positioning and location of electrical enclosures to ensure adequate protection from potential impingement of LPG in the liquid phase 4.11.2 Emergency Shut Down system (ESD) An ESD system shall be installed and meet the following requirements: a) ESD push button(s) shall be located in the sales area, the dispensing area and near the filling point of the storage !pressure vessel" if the filling point is not visible from the sales area The ESD system shall be re-settable only by an authorized person at the filling station; b) when an ESD push button is activated, the electric system of the LPG part of the station's facilities, excluding the emergency lighting, if present, shall be switched off, and all actuators shall close the valves within 15 s; NOTE 12 The LPG ESD system may be activated by the general emergency button at a multi-fuel filling station BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) c) ESD system shall completely isolate the delivery and dispensing pipe-work from the storage !pressure vessel"; d) where an audio warning system is installed entirely within a non-hazardous area, with no intermediate connections or cables within hazardous areas, then the warning system may remain operable after the ESD has been operated Hand wheels and handles of valves, which are designated to be closed in case of an emergency, shall be painted in red and shall be easily accessible !In unattended filling stations the activation of ESD system shall be automatically communicated to the permanent remote assistance, as defined in 4.12." ! 4.12 Permanent remote assistance In unattended filling stations a fixed intercom connection to a permanently staffed service shall be installed to allow malfunctions to be notified and to provide assistance to customers The service operators shall be properly trained: to activate the emergency procedures, if needed; to provide customers with instructions on the correct actions to be taken in case of emergency." Signs All the ESD buttons shall be clearly marked The LPG filling point of the storage !pressure vessel" shall be permanently marked with the wording “LPG filling point”, or similar description, in the local language The signs on the dispenser shall be in accordance with the requirements of EN 14678-1 The parking area for the road tanker shall be marked and delineated !At unattended filling stations, easily understandable instructions on refuelling procedures shall be displayed at the vehicle filling point in an indelible form and shall be clearly visible to the customers." 6.1 Testing of the installation Pressure test Upon completion, the installation, excluding the !pressure vessel", !pressure vessel" accessories and dispenser shall be pressure tested at the design pressure with the hydrostatic relief valve(s) replaced by plugs 6.2 Leak test After re-installing the hydrostatic relief valves the installation, including the !pressure vessel", !pressure vessel" accessories and dispenser, shall be tested for leaks at LPG vapour pressure 13 BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) 6.3 Test interpretation No leakage shall occur Commissioning of the installation Following satisfactory completion of all testing procedures, the installation shall be commissioned by the installer to verify that all systems are operational The tests and checks performed for commissioning shall be documented and recorded 14 BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) Annex A (informative) Explanatory drawings Key anchor plate anchor plate pipe (secured as close as possible to the shear valve) Figure A.1 — Sample of shear valve mounting 15 BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) Key 1a 1b 2a 10 11 12 13 14 15 excess flow valve excess flow valve/non return valve non return valve shut-off valve actuated valve (for ESD) pump pressure gauge by-pass valve shear valve dispenser pressure relief valve contents gauge filling point maximum filling level indication drainage valve breakaway coupling overground !pressure vessel" hydrostatic relief valve Figure A.2 — Sample of overground !pressure vessel" " installation 16 BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) Key 1a 2a 10 11 12 13 14 15 16 excess flow valve excess flow valve/non return valve shut-off valve actuated valve (for ESD) pump pressure gauge by-pass valve shear valve dispenser pressure relief valve contents gauge non-return valve drainage valve breakaway coupling maximum filling level indication to filling point underground !pressure vessel" hydrostatic relief valve Figure A.3 — Sample of underground pressure vessel installation with external pump 17 BS EN 14678-2:2007+A1:2012 EN 14678-2:2007+A1:2012 (E) 16 14 12 2a 11 2 13 1a 1a 16 16 10 1a 15 Key 1a 2a 10 11 12 13 14 15 16 excess flow valve excess flow valve/non return valve shut-off valve actuated valve (for ESD) submersible pump pressure gauge by-pass valve shear valve dispenser pressure relief valve contents gauge non-return valve drainage valve breakaway coupling maximum filling level indication filling point underground !pressure vessel" hydrostatic relief valve Figure A.4 — Sample of underground !pressure vessel" " installation with submersible pump 18