《ISO-13341-1997.pdf》由会员分享，可在线阅读，更多相关《ISO-13341-1997.pdf（14页珍藏版）》请在三一文库上搜索。
1、STD.ISO 13341-ENGL 3997 4853903 0775470 bT8 INTERNATIONAL STANDARD IS0 13341 :1997 TECHNICAL CORRIGENDUM 1 Published 1998-08-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXJPHAPOIIHM OPTAHM3AUMR Il0 CTAHIlAPTM3AUMM ORGANISATION INERNATIONALE DE NORMALISATION Transportable gas cylinders - Fitti
2、ng of valves to gas cylinders TECHNICAL CORRIGENDUM 1 Bouteilles a gaz transportables - Montage des robinets sur les bouteilles a gaz RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to Intemational Standard IS0 13341 :1997 was prepared by the European Committee for Standardization (CEN) in collabor
3、ation with IS0 Technical Committee TC 58, Gas cylinders, Subcommittee SC 2, Cylinder fittings, in accordance with the Agreement on technical cooperation between IS0 and CEN (Vienna Agreement). This material is reproduced from IS0 documents under International Organization for Standardization (ISO) C
4、opyright License number IHSllCC11996. Not for resale. No part of these IS0 documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of IS0 (Case postale 56,1211 Geneva 20, Switze
5、rland, Fax +41 22 734 10 7 9 ) , IHS or the IS0 Licensors members. Page i, Contents Change “Annex“ to “Annexes“ and add the following to the list of contents: ZZ (informative) Corresponding International and European Standards for which equivalents are not given in the text 7 Page 1, clause 2 In the
6、 first paragraph, lines 1 and 4, replace “European Standard“ with “Standard“. ICs 23.020.30 Ref. No. IS0 13341:1997/Cor.l:1998(E) Descriptors: gas pressure vessels, transportable equipment. gas cylinders. gas valves, fitting, screwed connections, specifications, procedure. Q IS0 1998 Printed in Swit
7、zerland STDeISO 13341-ENGL 1997 4851903 0?75471 534 IS0 13341 :1997/Cor.l:1998(E) 8 IS0 Page 3, subclause 5.2.5 In line 1, insert a comma after the word “torquing“. Page 7, AnnexZZ Replace Annex ZZ with the following. Annex U (informative) Corresponding International and European Standards for which
8、 equivalents are not given in the text At the time of publication of this International Standard, the edition of the following document was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of ap
9、plying the most recent edition of the document indicated below. Members of IS0 and IEC maintain registers of currently valid International Standards. EN 629-1 IS0 10920, Gas cylinders - 25E taper thread for connection of valves to gas cylinders - Specification. 2 STD-IS0 33341-ENGL 3797 4853703 0724
10、882 555 INTERNATIONAL STANDARD IS0 13341 First edition 1997-10-15 Transportable gas cylinders - Fitting of valves to gas cylinders Bouteilles a gaz transportables - Montage des robinets sur les bouteilles gaz This material is reproduce from IS0 documents under International Organization for Standard
11、ization (ISO) Copyright License number IHSIICCIl996. Not for resale. No part of these IS0 documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of IS0 (Case postale 56,121 1 G
12、eneva 20, Switzerland, Fax +41 22 734 10 79), IHS or the IS0 Licensors members. Reference number I SO 13341 : 1 997(E) STDSISO 13341-ENGL 1977 4851903 0724883 Li91 D IS0 13341:1997(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bo
13、dies (IS0 member bodies). The work of preparing international Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizatio
14、ns, governmental and non- governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circula
15、ted to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 13341 was prepared by the European Committee for Standardization (CEN) in collaboration with IS0 Technical Committee TC 58,
16、 Gas cylinders, Subcommittee SC2, Cylinder fittings, in accordance with the Agreement on technical cooperation between IS0 and CEN (Vienna Agreement). Annex A forms an integral part of this International Standard. Annex ZZ is for information only. Annex ZZ provides a list of corresponding Internatio
17、nal and European Standards for which equivalents are not given in the text. O IS0 1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permi
18、ssion in writing from the publisher. International Organization for Standardization Case postale 56 CH-1 21 1 Genve 20 Switzerland Internet centraliso.ch X.400 c=ch; a400net; p=iso; o=socs; s=central Printed in Switzerland ii STD-IS0 L33ql-ENGL lq97 Li851703 072Li884 328 D ISOFDIS 13341 :1997(E) Con
19、tents Page Foreword 1 Scope 2 Normative references 3 General requirements and recommendations 4 Preparation 5 Valving procedure for taper threaded valves 6 Valving procedure for parallel threaded valves Annex A (normative) Valving torques 1 1 1 2 3 4 5 iii -,-,- STD-IS0 13341-ENGL 1997 4851903 072Li
20、885 2b4 IS0 13341:1997(E) 6 IS0 Foreword The text of EN IS0 13341: 1997 has been prepared by Technical Committee CEN/TC 23 “Transportable gas cylinders“, the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 58 “Gas cylinders“. This European Standard shall be give
21、n the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1998, and conflicting national standards shall be withdrawn at the latest by April 1998. According to the CENKENELEC Internal Regulations, the national standards organizations of
22、 the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. STD-IS0 13341-ENGL 1797 4853703
23、072488b LTO D IS0 13341 : 1 997( E) 1 Scope This standard specifies the essential procedures to be followed when connecting cylinder valves to gas cylinders. It applies to all valve and cylinder combinations connected with screw threads detailed in annex A but excludes breathing apparatus, diving ga
24、s cylinders and fire extinguishers. It defines routines for inspection and preparation prior to valving for both taper and parallel screw threads. Torque values are given in annex A for steel and aluminium gas cylinders. 2 Normative references This European Standard incorporates by dated or undated
25、reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when inco
26、rporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 629-1 prEN IS0 1 1 1 16 prEN IS0 11 114-2 Transportable Gas Cylinders - 25E taper thread for connection of valves to gas cylinders - P a r t 1 : Specification Transportable G
27、as Cylinders - 17E taper thread for connection of valves to gas cylinders - Specifications Transportable Gas Cylinders - Compatibility of cylinder and valve materials with gas contents - P a r t 2: Non-metallic materials 3 General requirements and recommendations Cylinders and valves shall be connec
28、ted so that in use the combination is gas tight and the valve cannot be removed inadvertently from the cylinder. Tools used to screw the valve into the gas cylinder shall fit the valve properly and shall restrain the gas cylinder from turning during the torquing process. Tools shall not cause damage
29、 to either the valve or the cylinder. Minor marks to the valve are acceptable. Sealing materials used between the valve stem and cylinder neck threads shall be compatible with the gas to be contained in the cylinder, in accordance with prEN IS0 11 114-2. 1 IS0 13341:1997(E) For both taper and parall
30、el threads, the torque ranges given in annex A shall not be exceeded, even to achieve alignment of the valve and any guard. The maximum level of torque shall not be exceeded for taper threads because this will give rise to a high stress in the valve stem and in the cylinder neck. Great care shall be
31、 taken with aluminium alloy cylinders, for which valving torques are lower than for steel cylinders. Such cylinders shall not be valved at temperatures above ambient because, on cooling, differential contraction between the cylinder and the valve will give rise to a high stress in the cylinder neck.
32、 All tools used for valving cylinders shall be periodically checked for torque against a calibrated standard. NOTE: Many machine tools rely on the friction between the valve and gas cylinder threads to stop the machine turning once the correct torque has been reached. For fast running machines the i
33、nertia to be absorbed before the machine stops may result in valving torques being in practice far higher than the machine set point. 4 Preparation 4.1 Each valve and cylinder thread shall be examined to ensure that they are to the same dimensional standard, either EN 629-1, prEN IS0 1 1 1 16 or an
34、appropriate standard for the parallel thread sizes given in annex A. NOTE: The EN standards require that valve and cylinder threads are identified by marking. 4.2 The valve and cylinder threads shall be visually inspected for integrity and, where applicable, for damaged O ring sealing surfaces. In p
35、articular, when valving aluminium alloy cylinders, the bottom threads on the stem of valves and the lower threads within the cylinder neck, shall be fully formed and free from ragged edges or burrs. Similar care is required when fitting stainless steel valves to all cylinders. Q IS0 4 . 3 Threads on
36、 both valve and cylinder shall be checked for cleanliness. Any remnants of old PTFE sealing tape or other sealants shall be completely removed. Care shall be taken to prevent any debris falling into the cylinder. 2 STDBISO 13341-ENGL 1997 4851903 0724888 T73 IS0 13341:1997(E) 5 Valving procedure for
37、 taper threaded valves 5 . 1 General Thread sealing may be achieved using lubricant tape in accordance with 5.2 or lead caps in accordance with 5.3. Alternative sealing methods may be used e.g. paste, in which case refer to the manufacturers instructions. 5 . 2 Wrapping with lubricant tape 5 . 2 . 1
38、 Wrapping of the valve stem with tape shall commence at the small end of the taper, the tape shall be wound clockwise when looking from the base of the valve. 5 . 2 . 2 Wrapping shall commence beyond the small end of the valve taper, so that it protrudes by a maximum of 3 mm and a minimum of 1 mm. T
39、ape shall be overlapped during wrapping to give an even double thickness all the way up the valve stem. At the small end however, there shall be a minimum of 3 layers of tape. (see 5.2.5). 5 . 2 . 3 The tape shall not be excessively stretched during wrapping and shall be carefully torn or cut. 5 . 2
40、 . 4 Tape shall be carefully worked into the valve thread profile. NOTE: Adherence between the tape and the valve stem should be established. 5 . 2 . 5 Prior to torquing the valve shall be fitted to the cylinder by hand having previously rolled back the tape which protrudes beyond the valve bottom t
41、hread to leave the bottom of the valve clear of tape. 5 . 3 Application of lead caps 5 . 3 . 1 Lead caps shall not be used with aluminium cylinders. 5 . 3 . 2 The lead cap used shall be of the correct size. 5 . 3 . 3 After the cap is pulled over the valve stem it shall be carefully worked into the v
42、alve thread profile with a suitable tool or a leather glove, to prevent the bottom end of the lead cap being cut off when the valve is fitted. 5 . 3 . 4 Prior to torquing, the valves shall be fitted to the cylinder by hand. -,-,- STD-IS0 L3341-ENGL 1997 D 4851903 0724889 90T D IS0 1 3341 : 1 997( E)
43、 Q IS0 5.4 Valve torquing 5.4.1 Once the valve has been screwed in by hand as far as possible and after making sure that enough threads are engaged, a properly fitting tool shall be used to tighten the valve onto the cylinder. (see clause 3). 5.4.2 Torques shall be in accordance with those given in
44、annex A. 5.4.3 If required to check the torque that was applied for fitting, the value shall be measured by further tightening the valve. The minimum value obtained to move the valve shall be within the limits of annex A. A properly calibrated torque wrench shall be used. If setting type of sealants
45、 are used, torque checking shall be done before sealant sets. 6 Valving procedure for parallel threaded valves 6.1 An O ring seal which is compatible with the gas service shall be placed onto the valve stem. It shall be correctly positioned in the sealing area and shall not be damaged during placeme
46、nt. 6.2 If required an appropriate lubricant, compatible with the gas, shall be applied, to the three to four threads furthest away from the O ring. Only the minimum shall be used, excess shall be removed. The lower surface of the valve stem shall be completely clean. 6.3 The area of cylinder neck t
47、hread adjacent to the sealing area shall be clear of any debris, ragged edges, burrs, etc. 6.4 With the cylinder secured against rotation, the valve shall be fitted by hand paying particular attention to prevention of damage to the Oring as it is engaged into the cylinder sealing area. 6.5 Once the
48、valve has been screwed in by hand as far as possible, a properly fitting tool shall be used to apply the torque. 6.6 Torques shall be in accordance with those in annex A. 6.7 If required to check the torque that was applied for fitting, the value shall be measured by unscrewing the valve. The minimu
49、m value obtained to move the valve shall be within the limits of annex A. A properly calibrated torque wrench shall be used. If setting type of sealants are used, torque checking shall be done before sealant sets. 4 STD-IS0 L334L-ENGL 1997 W 4851903 0724890 b2L D IS0 13341 :1997(E) Taper valve stem size 17E 25E Annex A (normative) Valving torques Torque N.m Minimum Maximum 120“ 150“ 200“ 300* This annex applies to valves made from conventional materials, e.g. brass, stainless and ca