EN 14876-2007 en Transportable gas cylinders - Periodic inspection and testing of welded steel pressure drums《可运输气瓶 焊接钢压力气罐的周期检测和试验》.pdf

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1、BRITISH STANDARDBS EN 14876:2007Transportable gas cylinders Periodic inspection and testing of welded steel pressure drumsThe European Standard EN 14876:2007 has the status of a British StandardICS 23.020.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g

2、49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14876:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50504 1National forewordThis Briti

3、sh Standard was published by BSI. It is the UK implementation of EN 14876:2007.The UK participation in its preparation was entrusted by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/7, Gas cylinder (receptacle) operations.A list of organizations represented on PVE/3/7 can be obtai

4、ned 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. Amendments issued since publicationAmd. No. Dat

5、e CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14876January 2007ICS 23.020.30English VersionTransportable gas cylinders - Periodic inspection and testing ofwelded steel pressure drumsBouteilles gaz transportables - Contrles et essaispriodiques des fts pression souds en acierOrtsbeweglic

6、he Gasflaschen - Wiederkehrende Prfungvon geschweiten Fssern aus StahlThis European Standard was approved by CEN on 11 November 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national stan

7、dard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other lan

8、guage made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Ger

9、many, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGMan

10、agement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14876:2007: EEN 14876:2007 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Intervals between

11、periodic inspection and test5 4 List of procedures for periodic inspection and test.6 5 Identification of pressure drum and preparation for inspection and test6 6 Depressurization and de-valving procedures.7 7 External visual inspection 7 8 Internal visual inspection8 9 Supplementary tests .8 10 Ins

12、pection of openings .8 11 Pressure test 9 12 Pressure drum repair 10 13 Inspection of valves 11 14 Final operations .11 15 Rejection and rendering pressure drum unserviceable 13 Annex A (informative) Pressure drums manufactured according to National Regulations 14 Annex B (normative) Inspection peri

13、ods 16 Annex C (normative) Description, evaluation of defects and conditions for rejection of welded steel pressure drums at the time of visual inspection17 Annex D (normative) Procedure to be adopted when de-valving and when a valve is suspected to be obstructed 21 Bibliography 24 EN 14876:2007 (E)

14、 3 Foreword This document (EN 14876:2007) has been prepared by Technical Committee CEN/TC 23 “Transportable gas cylinders”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement,

15、at the latest by July 2007, and conflicting national standards shall be withdrawn at the latest by July 2007. This European Standard has been submitted for reference into the RID and/or the technical annexes of the ADR. Therefore in this context the standards listed in the normative references and c

16、overing basic requirements of the RID/ADR not addressed within the present standard are normative only when the standards themselves are referred to in the RID and/or the technical annexes of the ADR. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the foll

17、owing countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spa

18、in, Sweden, Switzerland and United Kingdom. EN 14876:2007 (E) 4 Introduction The principal aim of a periodic inspection and testing procedure is that, at the completion of the test, the pressure drums may be reintroduced into service for a further period of time. Experience of the inspection and tes

19、ting of pressure drums which is specified in this European Standard is an important factor when determining whether a pressure drum should be returned into service. EN 14876:2007 (E) 5 1 Scope This European Standard deals with welded steel transportable pressure drums intended for compressed and liq

20、uefied gases under pressure of water capacity from 150 litres up to 1 000 litres. This European Standard specifies the requirements for periodic inspection and testing to verify the integrity of such pressure drums to be re-introduced into service for a further period of time. It also defines a proc

21、edure to qualify existing pressure drums for free movement between member states of the European Union (see Annex A). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated re

22、ferences, the latest edition of the referenced document (including any amendments) applies. EN 14208, Transportable gas cylinders Specification for welded pressure drums up to 1 000 litre capacity for the transport of gases Design and construction EN ISO 11114-1, Transportable gas cylinders Compatib

23、ility of cylinder and valve materials with gas contents Part 1: Metallic materials (ISO 11114-1:1997) EN ISO 11114-2, Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 2: Non-metallic materials (ISO 11114-2:2000) EN ISO 11621, Gas cylinders Procedures f

24、or change of gas service (ISO 11621:1997) EN ISO 13341, Transportable gas cylinders Fitting of valves to gas cylinders (ISO 13341:1997) EN ISO 13769, Gas cylinders Stamp marking (ISO 13769:2002) 3 Intervals between periodic inspection and test In order to ensure continued safe operation, pressure dr

25、ums shall be subjected periodically to inspection and test in accordance with Annex B. A pressure drum shall fall due for periodic inspection and test on its first receipt by filler after expiry of the interval in Annex B. NOTE 1 Table B.1 gives a list of the intervals between periodic inspections f

26、or some gases which conforms to the current RID/ADR regulations and also gives recommendations which can be subsequently adopted by the RID/ADR regulations. Provided that the pressure drum has been subjected to normal conditions of use and has not been subjected to abusive and abnormal conditions ma

27、king the pressure drum unsafe, there is no requirement for the user to return a pressure drum before the contents have been used even though the test interval may have been exceeded. However, it is suggested that pressure drums are re-tested at a period not exceeding twice the normative time interva

28、l specified in Table B.1. NOTE 2 Certain products such as hydrogen fluoride require an intermediate check of wall thickness as well as the contents to be checked for pressure rise due to the generation of gases such as hydrogen. Other products such as hydrogen bromide should not be allowed to exceed

29、 one and a half times the time interval for the normative test interval in Table B.1. EN 14876:2007 (E) 6 4 List of procedures for periodic inspection and test Each pressure drum shall be submitted to a periodic inspection and test. The following procedures form the requirements for such inspection

30、and test, and are explained more fully in later clauses: identification of pressure drum and preparation for inspection and test; depressurization and de-valving operation; external visual inspection; visual inspection of welds; internal visual inspection; supplementary tests; inspection of valve co

31、nnections; repair of pressure drums; inspection of openings; inspection of valves; proof pressure test; final operations, including drying; rejection and rendering pressure drums unserviceable. Where pressure drums are manufactured according to National Regulations and are intended to be qualified u

32、nder the Transportable Pressure Equipment Directive (TPED) for free movement and use between member states of the European Union, additional requirements are specified in Annex A. It is recommended that the above listed tests are performed in the suggested sequence. For most gases, the internal visu

33、al examination (Clause 8) should be carried out before the pressure test (Clause 11). In some cases, e.g. HCl, performing the hydraulic test first can dissolve residual product thus making the internal inspection less hazardous. Pressure drums which fail the inspection or tests shall be rejected. Wh

34、en after the above tests, doubts still exist as to the extent of a defect or the condition of a pressure drum, additional tests may be performed in accordance with Clause 9, until such doubts are positively resolved, or the pressure drum shall be rendered unserviceable. 5 Identification of pressure

35、drum and preparation for inspection and test Before any work is carried out, details of the design, contents and ownership shall be identified. If it is intended to change the service of the drum, procedures in EN ISO 11621 shall be followed. EN 14876:2007 (E) 7 6 Depressurization and de-valving pro

36、cedures The pressure drum shall be depressurised and emptied in a safe and controlled manner before proceeding. Particular attention shall be paid to pressure drums that have contained flammable, oxidising or toxic gases to eliminate risks at the internal visual inspection. Additionally, as some liq

37、uefied products may not be removed from the pressure drum by venting, an additional check such as check weighing or check of the atmosphere of the pressure drum may be required. It is recommended that pressure drums containing a hazardous product are purged in a safe manner. Pressure drums with inco

38、rrect markings, unknown product contents, or those which cannot be safely emptied of product shall be set aside for special handling. Before removing any pressure retaining accessory e.g. valve, flange, a positive check shall be performed to ensure that the pressure drum does not contain any gas und

39、er pressure. This can be performed as described in Annex D using the device such as shown in Figure D.1. NOTE If the above procedure is not performed, a violent reaction can occur e.g. projection of the valve, release of toxic gas, fire etc. Pressure drums with inoperative or blocked valves shall be

40、 treated as outlined in Annex D. Provided the requirements above have been complied with, and the pressure drum has been safely depressurised, the valves and/or flanges, as applicable, may be removed. 7 External visual inspection 7.1 Preparation for external visual inspection Each pressure drum shal

41、l be cleaned and have all labels, loose coatings, corrosion products, tar, oil or other foreign matter removed from its external surface, e.g. by brushing, shot-blasting, (under controlled conditions), water jet abrasive cleaning, chemical cleaning or other methods. Care shall be taken at all times

42、to ensure that the pressure drum is not damaged or excess amounts of the wall of the pressure drum are not removed by the cleaning application. If a fused nylon, polythene or a similar coating has been applied and is seen to be damaged, or prevents a proper inspection, then the coating shall be remo

43、ved. If the coating is removed by the application of heat the temperature of the pressure drum shall not exceed 300 C. 7.2 Inspection procedure The external surface of each pressure drum shall undergo a thorough visual inspection for: dents, cuts, gouges, bulges, cracks, laminations or excessive wea

44、r; heat damage, torch or electric arc burns, (as identified in Table C.1); corrosion (as defined in Table C.2). Special attention shall be given to areas where water may be trapped; all welds and welded attachments and the areas adjacent to them shall be checked for defects; other defects such as il

45、legible or unauthorized stamp markings, unauthorized additions or modifications; integrity of all permanent attachments e.g. shrouds, lifting points, lifting pockets, rolling bands; damage to rolling bands. Occasionally, it may be necessary to use non destructive techniques (NDT) such as dye-penetra

46、nt, to investigate potential cracks. EN 14876:2007 (E) 8 For rejection criteria see Annex C. Pressure drums no longer suitable for continued service shall be rendered unserviceable (as defined in Clause 15). 8 Internal visual inspection Once the requirements of Clause 6 have been met, each pressure

47、drum shall be inspected internally to identify any defects such as those listed in 7.2. Precautions shall be taken to ensure that the method of illumination presents no hazard to the person carrying out the inspection. Any internal lining or coating which may prevent a thorough examination shall be

48、removed. Any pressure drum showing presence of foreign matter or signs of more than light surface corrosion shall be cleaned under closely controlled conditions by shot blasting, water jet abrasive cleaning, flailing, steam jet, hot water jet, rumbling, chemical cleaning or other method. Care shall

49、be taken to avoid damage to the pressure drum. If cleaning is required the pressure drum shall be re-inspected after the cleaning operation. 9 Supplementary tests Where there is doubt concerning the type/severity of a defect found on visual inspection (see Clauses 7 and 8), or when the cleaning processes might have reduced the wall thickness, additional tests or methods of examination may be applied, e.g. ultrasonic techniques, check weighing or other non-destructive tests. Only when all doubts are eliminated may