1、July 2015Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23
2、.060.40!%D8w“2332184www.din.deDDIN EN 16631LPG equipment and accessories Pressure relief valves for LPG pressure vessels Reconditioning requirements;English version EN 16631:2015,English translation of DIN EN 16631:2015-07Flssiggas-Gerte und Ausrstungsteile Sicherheitsventile fr Druckbehlter fr Flss
3、iggas (LPG) Anforderungen an die Instandsetzung;Englische Fassung EN 16631:2015,Englische bersetzung von DIN EN 16631:2015-07quipements pour GPL et leurs accessoires Soupapes de scurit pour rservoirs de GPL sous pression Exigences de reconditionnement;Version anglaise EN 16631:2015,Traduction anglai
4、se de DIN EN 16631:2015-07www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 15 pages06.15 DIN EN 16631:2015-07 2 A comma is used as the decimal marker. National foreword This document (EN 16631:2015) has been prepared by Technical Committ
5、ee CEN/TC 286 “Liquefied Petroleum Gas equipment and accessories” (Secretariat: NSAI, Ireland). The responsible German body involved in its preparation was the DIN-Normenausschuss Druckgasanlagen (DIN Standards Committee Pressurized Gas Installations), Working Committee NA 016-00-06 AA Flssiggas-Ger
6、te und Ausrstung; Spiegelausschuss zu CEN/TC 286. EN 16631 May 2015 ICS 23.060.40 English Version LPG equipment and accessories - Pressure relief valves for LPG pressure vessels - Reconditioning requirements quipements pour GPL et leurs accessoires - Soupapes de scurit pour rservoirs de GPL sous pre
7、ssion - Exigences de reconditionnement Flssiggas-Gerte und Ausrstungsteile - Sicherheitsventile fr Druckbehlter fr Flssiggas (LPG) - Anforderungen an die Instandsetzung This European Standard was approved by CEN on 5 March 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulatio
8、ns 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. T
9、his 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 me
10、mbers are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Port
11、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16631:2015 EEUROPEAN ST
12、ANDARDNORME EUROPENNEEUROPISCHE NORMEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEN 16631:2015 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 General 6 5 Materials .6 5.1 General 6 5.
13、2 Lubricants, sealants and adhesives 6 5.3 Shelf life 6 5.3.1 Shelf life of components .6 5.3.2 Storage life of assembled PRVs .7 6 Inspection .7 7 Reconditioning .7 8 Pressure setting .8 8.1 General 8 8.2 Setting and testing of PRVs 8 9 Changing the set pressure .9 10 Marking .9 11 Documentation/Ce
14、rtification .9 12 Operating instructions 9 Annex A (informative) Assessment of PRVs by sampling . 11 A.1 General testing of PRVs on a sampling basis . 11 A.2 Sample size . 11 A.3 Sample selection. 11 A.4 Inspection period 12 A.5 Pass criteria . 12 Bibliography . 13 DIN EN 16631:2015-07EN 16631:2015
15、(E) 3 Foreword This document (EN 16631:2015) 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 identic
16、al text or by endorsement, at the latest by November 2015, and conflicting national standards shall be withdrawn at the latest by November 2015. 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
17、responsible for identifying any or all such patent rights. 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,
18、Finland, Former Yugoslav Republic of Macedonia, 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. DIN EN 16631:2015-07EN 16631
19、:2015 (E) 4 Introduction Protection of the environment is a key political issue in Europe and elsewhere. Protection of the environment is taken in a very broad sense. What is meant is the total life cycle aspects of, e.g. a product on the environment, including expenditure of energy and during all p
20、hases from mining of raw materials, fabrication, packaging, distribution, use, scrapping, recycling of materials, etc. Provisions have to be restricted to a general guidance. Limit values are specified in national laws. It is recommended that companies using this standard develop an environmental ma
21、nagement policy. For guidance see ISO 14000 series. It has been assumed in the drafting of this European Standard that the execution of its provisions is entrusted to appropriately qualified and experienced people. Where judgements are called for, it has been assumed that they are made by competent
22、persons who have been trained specifically for the tasks. DIN EN 16631:2015-07EN 16631:2015 (E) 5 1 Scope This European Standard specifies the requirements for the reconditioning, retesting and certification of Pressure Relief Valves (PRVs) for LPG pressure vessels covered under the scope of EN 1412
23、9. This European Standard applies to retesting and reconditioning of PRVs that are carried out in a workshop and does not apply to site adjustment of installed PRVs. Annex A is an informative annex detailing a sampling approach for PRV requalification which should only be used in case of on-site req
24、ualification of series produced pressure vessels fitted with series produced PRVs. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For und
25、ated references, the latest edition of the referenced document (including any amendments) applies. EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water Part 1: Anaerobic jointing compounds EN 751-2, Sealing materials for metallic thread
26、ed 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
27、tube pressure gauges Dimensions, metrology, requirements and testing EN 14129, LPG Equipment and accessories Pressure relief valves for LPG pressure vessels ISO 2230, Rubber products Guidelines for storage 3 Terms and definitions For the purposes of this document, the following terms and definitions
28、 apply. 3.1 liquefied petroleum gas LPG low pressure liquefied gas composed of 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
29、3.2 pressure relief valve PRV 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 Note 1 to entry: This is known as a “safety valve” in ADR. 3.3 competent p
30、erson person which by combination of appropriate qualification, training, experience, and resources, is able to make objective judgments on the subject DIN EN 16631:2015-07EN 16631:2015 (E) 6 3.4 setting operation of adjusting and testing the start to discharge pressure to the nominal set pressure 3
31、.5 reconditioning operation that includes complete dismantling of the valve, evaluation and replacement of components and reassembly 3.6 pop action rapid opening of the pressure relief valve sealing element so that the pressure relief valve is fully open, resulting from an increase of inlet pressure
32、 creating a sudden increase in force and compression of the spring 3.7 sealing element non-metallic moveable resilient component which affects a seal by contact with the pressure relief valve seat 4 General PRVs shall have a storage life of two years after assembly. All PRVs shall be subjected to in
33、spection in accordance with Clause 6 prior to reconditioning, setting or changing the set pressure. PRVs where the set pressure (reset) is to be changed, shall meet the requirements of Clause 9. PRVs that have been stored for more than two years, but are less than five years old, shall have the seal
34、ing element changed and shall meet the requirements of Clauses 6 and 8. PRVs that have been stored for more than five years shall be reconditioned in accordance with Clauses 6, 7 and 8. PRVs that are to be reconditioned shall be subjected to reconditioning in accordance with Clauses 6, 7 and 8. 5 Ma
35、terials 5.1 General Components for reconditioning shall meet the Original Equipment Manufacturer (OEM) specification. 5.2 Lubricants, sealants and adhesives Lubricants, sealants and adhesives shall be compatible with LPG and not interfere with the operation of the PRV, when used on operating threads
36、 and seals. Sealants shall comply with the requirements of EN 751-1, EN 751-2 or EN 751-3. 5.3 Shelf life 5.3.1 Shelf life of components Metallic components, other than springs (see 5.3.2), have an unlimited shelf life. Rubber components shall have a storage life of 7 years with the ability to exten
37、d this to 10 years when the requirements of ISO 2230 are met. Lubricants, sealants and adhesives shall have a shelf life in accordance with the manufacturers instructions. DIN EN 16631:2015-07EN 16631:2015 (E) 7 5.3.2 Storage life of assembled PRVs After manufacture PRVs may be stored for up to two
38、years when stored in line with the manufacturers recommendations. Manufacturers shall ensure that the functional characteristics of the PRV such as opening pressure, reseating pressure, flow capacity, etc. remain in line with the design standard and the specification during this period. PRVs that ex
39、ceed this storage period of two years shall have the sealing element replaced and shall be assembled, set and tested in accordance with Clause 8 to ensure correct operation. PRVs that have been in storage for more than five years shall be reconditioned. Springs and seals on PRVs that have been in st
40、orage for more than five years shall not be reused. 6 Inspection PRVs shall be subjected to inspection for the following criteria to establish the suitability of the PRV or its components for reuse. Components which do not meet the following criteria and cannot be safely rectified shall be scrapped:
41、 stems that have drill holes in the potentially stressed area above the nut; bent or damaged stems; bent, deformed, corroded, badly marked, scored or cracked bodies; contaminants, foreign matter and corrosion; cross-threaded, damaged or stripped PRV threads; indications of having been subjected to e
42、xcessive heat or having been in a fire; foreign matter in visible internal passageways; or evidence of abuse or tampering. PRVs that are to be reconditioned shall also be checked for: damaged sealing surfaces and/or any non-metallic sealing elements; and non-standard parts. 7 Reconditioning Each PRV
43、 shall be dismantled into its component parts. Each component shall be inspected to ensure its suitability for reuse including meeting the manufacturers original specification. Threads shall be cleaned and checked for stripped threads, damage, distortion, cuts, cracks or corrosion. Threads shall be
44、assessed by a competent person to determine if they can be rectified and reused. Taper threads where the full form thread gauge screws on by more than 1 turn over maximum shall be scrapped. Threads shall be checked using thread gauges. During reconditioning springs shall not be reused once removed f
45、rom a PRV. DIN EN 16631:2015-07EN 16631:2015 (E) 8 During reconditioning non-metallic materials shall not be reused in a PRV. Spare parts used in the reconditioning of PRVs shall be to the original manufacturers specification. For mobile applications, PRVs shall be constructed with the stem guide pe
46、rmanently attached to the PRV body. This design shall be able to withstand a deceleration of 100 times gravity and shall remain leak tight and operate correctly afterwards. The reconditioned PRV shall be tested in accordance with Clause 8. 8 Pressure setting 8.1 General Setting and testing shall be
47、carried out in accordance with the requirements of this standard by the PRV reconditioner, prior to any painting which may be required. The tests required below for all PRVs shall be conducted using air or nitrogen. The responsibility for the design and safety of the pneumatic test rig rests with th
48、e reconditioner. The accuracy class for pressure measuring equipment used during the tests shall not be more than 0,6, see EN 837-1:1996, with the test pressure within the middle third of the instrument range. All Bourdon tube pressure gauges shall be calibrated in accordance with EN 837-1. PRVs und
49、ergoing pneumatic pressure testing shall not be subjected to any form of shock load. The hazards involved in pneumatic pressure testing shall be considered and appropriate precautions taken. All pipes, connections and blanking devices of the test installation shall be capable of withstanding at least twice the nominal set pressure of the PRV on test. 8.2 Setting and testing of PRVs 8.2.1 Only springs to the original PRV manufacturers
