ISO-11120-1999.pdf
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1、A Reference number ISO 11120:1999(E) INTERNATIONAL STANDARD ISO 11120 First edition 1999-03-15 Gas cylinders Refillable seamless steel tubes of water capacity between 150 l and 3 000 l Design, construction and testing Bouteilles gaz Tubes en acier sans soudure rechargeables dune contenance en eau de
2、 150 l 3 000 l Conception, construction et essais ISO 11120:1999(E) ISO 1999 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 permission in w
3、riting from the publisher. International Organization for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internetisoiso.ch Printed in Switzerland ii ContentsPage 1 Scope1 2 Normative references1 3 Definitions 2 4 Symbols3 5 Inspection and testing.3 6 Materials .3 7 Design.6 8 Construct
4、ion and workmanship.7 9 Batch tests8 10 Tests on every cylinder.9 11 Special requirements for tubes for embrittling gases .11 12 Marking.13 Annex A (normative) ISO High-pressure gas tube/cylinder chemistry groupings.14 Annex B (normative) Ultrasonic inspection .15 Annex C (informative) Description,
5、evaluation of manufacturing defects and conditions for rejection of seamless steel tubes at time of visual inspection.20 Annex D (informative) Acceptance certificate27 Annex E (informative) Checklist for production testing29 Bibliography30 -,-,- ISOISO 11120:1999(E) iii Foreword ISO (the Internation
6、al Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been e
7、stablished has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standard
8、ization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least
9、75 % of the member bodies casting a vote. International Standard ISO 11120 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 3, Cylinder design. Annexes A and B form an integral part of this International Standard. Annexes C, D and E are for information only. ISO 11120:19
10、99(E) ISO iv Introduction The purpose of this International Standard is to provide a specification for the design, manufacture, inspection and testing of tubes for worldwide usage. The objective is to balance design and economic efficiency against international acceptance and universal utility. This
11、 International Standard aims to eliminate concern about climate, duplicate inspections and restrictions currently existing because of lack of definitive International Standards. This International Standard should not be construed as reflecting on the suitability of the practice of any nation or regi
12、on. -,-,- INTERNATIONAL STANDARD ISOISO 11120:1999(E) 1 Gas cylinders Refillable seamless steel tubes of water capacity between 150 l and 3 000 l Design, construction and testing 1 Scope This International Standard specifies minimum requirements for the material, design, construction and workmanship
13、, manufacturing processes and tests at manufacture of refillable quenched and tempered seamless steel tubes of water capacities from 150 l up to and including 3 000 l for compressed and liquefied gases exposed to extreme world-wide ambient temperatures (normally between 250 C and 165 C). This Intern
14、ational Standard is applicable to tubes with a maximum tensile strength Rm of less than 1 100 MPa. These tubes can be used alone or in batteries to equip trailers or skids (ISO modules) for the transportation and distribution of compressed gases. This International Standard does not include consider
15、ation of any additional stresses that may occur during service or transport, e.g. bending stresses, etc. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subs
16、equent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, th
17、e latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 1481), Steel Charpy impact test (V-notch). ISO 65062), Metallic materials Hardness test Brinell test. ISO 6892, Metallic materials Tensile testing
18、 at ambient temperature. ISO 11114-1, Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 1: Metallic materials. ISO 11484, Steel tubes for pressure purposes Qualification and certification of non-destructive testing (NDT) personnel. 1) To be replaced by
19、ISO 148-1, ISO 148-2 and ISO 148-3. 2) To be replaced by ISO 6506-1, ISO 6506-2 and ISO 6506-3. -,-,- ISO 11120:1999(E) ISO 2 3 Definitions For the purposes of this International Standard the following definitions apply. 3.1 yield stress value corresponding to the 0,2 % proof stress, Rp0,2 3.2 quenc
20、hing hardening heat treatment in which a tube, which has been heated to a uniform temperature above the upper critical point Ac3 of the steel, is cooled rapidly in a suitable medium 3.3 tempering softening heat treatment which follows quenching, in which the tube is heated to a uniform temperature b
21、elow the lower critical point Ac1 of the steel 3.4 tube a double ended pressure gas cylinder manufactured from seamless tubing 3.5 batch a quantity of up to 200 tubes of the same nominal diameter, thickness and design made from the same steel cast and subjected to the same heat treatment for the sam
22、e duration of time 3.6 test pressure required pressure (ph) applied during a pressure test 3.7 design stress factor F ratio of the equivalent wall stress at test pressure (ph) to guaranteed minimum yield stress (Re) ISOISO 11120:1999(E) 3 4 Symbols SymbolDefinition acalculated minimum thickness, in
23、millimetres, of the cylindrical shell aguaranteed minimum thickness, in millimetres, of the cylindrical shell Apercentage elongation Dnominal outside diameter of the tube, in millimetres fa constant in the design stress factor (see 11.3) Fdesign stress factor (see 3.7) L0original gauge length, in mi
24、llimetres, according to ISO 6892 ph hydraulic test pressure, in bara above atmospheric pressure Re guaranteed minimum value of yield stress, in megapascalsa Reavalue of the actual yield stress, in megapascals, determined by the tensile test Rgguaranteed minimum value of the tensile strength, in mega
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