DIN EN 14912-2015 LPG equipment and accessories - Inspection and maintenance of LPG cylinder valves at time of periodic inspection of cylinders German version EN 14912 2015《LPG设备和组.pdf

1、May 2015 Translation by DIN-Sprachendienst.English price group 9No 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!%Bd“2315865www.din.deDDIN EN 14912LPG equipment and accessories Inspection and maintenance of LPG cylinder valves at time of periodicinspection of cylinders;English version EN 14912:2015,English translation of DIN EN 14912:2015-05Flssiggas-Gerte und Ausrstungsteile Inspektion und Wartung von

3、Ventilen fr Flaschen fr Flssiggas (LPG) zum Zeitpunkt derwiederkehrenden Inspektion der Flaschen;Englische Fassung EN 14912:2015,Englische bersetzung von DIN EN 14912:2015-05quipements pour GPL et leurs accessoires Contrle et entretien des robinets de bouteilles de GPL lors du contrle priodique desb

4、outeilles;Version anglaise EN 14912:2015,Traduction anglaise de DIN EN 14912:2015-05SupersedesDIN EN 14912:2006-03www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 14 pages 04.15 DIN EN 14912:2015-05 2 A comma is used as the decimal marke

5、r. National foreword This document (EN 14912:2015) has been prepared by Technical Committee 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

6、Committee Pressurized Gas Installations), Working Committee NA 016-00-06 AA Flssiggas-Gerte und Ausrstung; Spiegelausschuss zu CEN/TC 286. This standard is intended to be referenced within the context of the European Agreement on the International Carriage of Dangerous Goods by Road (RID/ADR). Befor

7、e applying this standard, users of this standard are to verify whether the provisions of other laws and regulations have been met, particularly those regarding occupational safety and health. The DIN Standards corresponding to the International Standards referred to in this document are as follows:

8、ISO 2859-1 DIN ISO 2859-1 Amendments This standard differs from DIN EN 14912:2006-03 as follows: a) the standard has been aligned with the requirement of paragraph 12 of Packing Instruction P200 of ADR; b) inspection and refurbishment requirements for pressure relief valves have been included; c) en

9、vironmental aspects have been included. Previous editions DIN EN 14912: 2006-03 National Annex NA (informative) Bibliography DIN ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection EUROPEAN STANDARD

10、 NORME EUROPENNE EUROPISCHE NORM EN 14912 March 2015 ICS 23.060.40 Supersedes EN 14912:2005English Version LPG equipment and accessories - Inspection and maintenance of LPG cylinder valves at time of periodic inspection of cylindersquipements pour GPL et leurs accessoires - Contrle et entretien des

11、robinets de bouteilles de GPL lors du contrle priodique des bouteilles Flssiggas-Gerte und Ausrstungsteile - Inspektion und Wartung von Ventilen fr Flaschen fr Flssiggas (LPG) zum Zeitpunkt der wiederkehrenden Inspektion der Flaschen This European Standard was approved by CEN on 26 December 2014. CE

12、N 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 app

13、lication 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 M

14、anagement 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, La

15、tvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Ma

16、rnix 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 14912:2015 EEN 14912:2015 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 General requirem

17、ents 6 4.1 General 6 4.2 Cleaning 6 4.3 Personnel 6 4.4 Safety concerns .7 5 Inspections .7 5.1 General 7 5.2 External inspection 7 5.3 Additional inspection criteria .8 5.4 Pressure relief valves 8 5.4.1 General requirement 8 5.4.2 Individual test .8 5.4.3 Batch sampling test .9 5.5 Acceptance crit

18、eria 9 6 Maintenance .9 6.1 Minor repair 9 6.2 Refurbishment 9 6.2.1 General 9 6.2.2 Valve inspection during refurbishment .9 6.2.3 Valve repair during refurbishment 10 7 Testing . 10 7.1 Refurbished valves . 10 7.2 All other valves . 10 8 Marking 10 Bibliography . 12 DIN EN 14912:2015-05 EN 14912:2

19、015(E)3 Foreword This document (EN 14912:2015) has been prepared by Technical Committee CEN/TC 286 “LPG 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 endo

20、rsement, at the latest by September 2015, and conflicting national standards shall be withdrawn at the latest by September 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 responsible for

21、identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This document supersedes EN 14912:2005. The main changes between this version of this standard and the previous version are: ali

22、gnment with the requirement of paragraph 12 of Packing Instruction P200 of ADR; introduction of inspection and refurbishment requirements for pressure relief valves. It is recommended that users develop an environmental management policy. For guidance, see EN ISO 14000 series, see 1, 2 and 3. Users

23、of this standard should consult FprCEN/TS 16765 4 while implementing its requirements. This European Standard has been submitted for reference into the technical annexes of the ADR 5. NOTE These regulations take precedence over any clause of this European Standard. It is emphasized that ADR is regul

24、arly revised at intervals of two years, which may lead to temporary non-compliances with the clauses of this European Standard. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, B

25、elgium, 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, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swi

26、tzerland, Turkey and the United Kingdom. DINEN 14912:2015-05EN 14912:2015 (E) 4 Introduction This European Standard has been prepared to reflect the current methods for periodically inspecting LPG cylinder valves, and is based upon the operating experience of millions of cylinder years of service ov

27、er a period of more than 50 years. The primary objective of the periodic inspection of transportable refillable LPG cylinder valves is that, at the completion of the tests, the cylinder valve can be re-introduced into service for a further period of time. The valve inspection is an integral part of

28、the periodic inspection of an LPG cylinder. Periodic inspections/tests shall be carried out by a competent person under the authorization of an inspection body based on a written scheme of examination. This European Standard calls for the use of substances and procedures that can be injurious to hea

29、lth if adequate precautions are not taken. It refers to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. It has been assumed in the drafting of this European Standard that the execution of its provisions is entrusted to appropriat

30、ely qualified and experienced people. Where judgements are called for, it has been assumed that they are made by competent persons who have been trained specifically for the tasks. DINEN 14912:2015-05EN 14912:2015(E)5 1 Scope This European Standard specifies the requirements for inspection and maint

31、enance of LPG cylinder valves, either manually operated or self-closing, for reuse. It applies when the valve is either inspected or refurbished at the time of periodic inspection of the cylinder. This European Standard may also be applied at any other time, for example, when maintenance of the valv

32、e is necessary. 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 undated references, the latest edition of the referenced document (inc

33、luding any amendments) applies. EN 13953, LPG equipment and accessories Pressure relief valves for transportable refillable cylinders for Liquefied Petroleum Gas (LPG) EN ISO 14245, Gas cylinders Specifications and testing of LPG cylinder valves Self-closing (ISO 14245) EN ISO 15995, Gas cylinders S

34、pecifications and testing of LPG cylinder valves Manually operated (ISO 15995) ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection 3 Terms and definitions For the purposes of this document, the foll

35、owing terms and definitions 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

36、of other hydrocarbon gases 3.2 periodic inspection activities carried out at defined intervals, such as examining, measuring, testing or gauging the characteristics of a pressure vessel and comparing these with specified requirements 3.3 dismantling separation into component parts 3.4 minor repair o

37、perations that include cleaning and replacement of components accessible without any dismantling of the valve (e.g. outlet seal, excess flow device) 3.5 refurbishment operation that includes complete dismantling of the valve, evaluation and replacement of internal components, and reassembly DIN EN 1

38、4912:2015-05 EN 14912:2015(E)6 3.6 competent person person which by combination of appropriate qualification, training, experience and resources, is able to make objective judgments on the subject 3.7 external leak tightness resistance to leakage through the fitting to or from the atmosphere when th

39、e valve/fitting is open 3.8 internal leak tightness resistance to leakage across the valve or fitting seat or other internal sealing components when the valve is closed 3.9 written scheme document, prepared by an inspection body, containing inspection information 3.10 self-closing valve normally clo

40、sed valve that provides a leak tight seal, opens by the engagement of a special connector or by fluid passing through it and closes automatically upon removal of the connector or by stopping the fluid flow 3.11 working pressure pressure under normal operating conditions 4 General requirements 4.1 Ge

41、neral The valve shall be cleaned externally to facilitate inspection. The inspection shall determine if: the valve is suitable for service; maintenance is required; or the valve shall be scrapped. 4.2 Cleaning Contaminants, foreign matter and corrosion products shall be removed from the valve to fac

42、ilitate inspection, taking care not to damage any sealing surfaces. If any cleaning materials are used, they shall be: completely removed after use; or suitable for and compatible with LPG and the materials of construction of the valve, the LPG cylinder and the associated downstream equipment. 4.3 P

43、ersonnel Valves shall be inspected and maintained by a competent person. Where valve removal is required, it shall only be removed from LPG cylinders by competent personnel, or under the responsibility of a competent person. DIN EN 14912:2015-05 EN 14912:2015 (E) 7 4.4 Safety concerns Prior to manua

44、lly removing a valve, it shall be verified that the cylinder does not contain liquid and is not under pressure. An additional check shall be made to ensure that the valve is not obstructed or blocked. Cylinders that contained liquid shall be emptied and depressurized in a safe and controlled manner.

45、 Cylinders with inoperative or blocked valves shall be set aside for safe valve removal. To confirm if an LPG cylinder contains residual liquid LPG, when its valve is suspected to be inoperative or blocked, it can be weighed and this weight compared to the tare mass. Valves shall only be removed fro

46、m and refitted safely to a pressurized LPG cylinder provided the facility includes suitable equipment. External inspection and minor repairs may be carried out on valves while they are connected to a pressurized LPG cylinder, e.g. at time of filing, but this may require special procedures and equipm

47、ent. Refurbishment shall only be performed on valves that have been removed. 5 Inspections 5.1 General All valves shall be inspected in accordance with 5.2. If the valves have been removed from the cylinders, additional inspections shall be performed in accordance with 5.3. Valves fitted with dip-tu

48、bes, eduction tubes, sediment tubes, inlet filters, level indicating devices or overfill protection devices shall be removed from the cylinders. Valves with excess flow devices fitted onto the stems of manually operated valves shall also be removed from the cylinders unless the correct operation of the flow devices is checked after each filling. Valves fitted with pressure relief valves shall also be tested in accordance with 5.4. 5.2 External inspection All valves shall be externally inspected f