1、BSI Standards Publication BS ISO 9809-4:2014 Gas cylinders Refillable seamless steel gas cylinders Design, construction and testing Part 4: Stainless steel cylinders with an Rm value of less than 1 100 MPaBS ISO 9809-4:2014 BRITISH STANDARD National foreword This British Standard is the UK implement
2、ation of ISO 9809-4:2014. The UK participation in its preparation was entrusted to Technical Committee PVE/3/3, Gas containers - Transportable gas containers - Cylinder design, construction and testing at the time of manufacture. A list of organizations represented on this committee can be obtained
3、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. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 76315 1 ICS 23.020.30 Compliance wit
4、h a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2014. Amendments issued since publication Date Text affectedBS ISO 9809-4:2014 ISO 2014 Gas cylinders Refillable seaml
5、ess steel gas cylinders Design, construction and testing Part 4: Stainless steel cylinders with an Rm value of less than 1 100 MPa Bouteilles gaz Bouteilles gaz rechargeables en acier sans soudure Conception, construction et essais Partie 4: Bouteilles en acier inoxydable avec une valeur Rm infrieur
6、e 1 100 MPa INTERNATIONAL STANDARD ISO 9809-4 First edition 2014-0 7-15 Reference number ISO 9809-4:2014(E)BS ISO 9809-4:2014ISO 9809-4:2014(E)ii ISO 2014 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2014 All rights reserved. Unless otherwise specified, no part of this publication may be rep
7、roduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the request
8、er. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO 9809-4:2014ISO 9809-4:2014(E) ISO 2014 All rights reserved iii Contents Page Foreword v Introduction vi 1 Scope . 1 2 Normati
9、ve references 1 3 Terms and definitions . 1 4 Symbols 2 5 Inspection and testing 3 6 Materials . 4 6.1 General requirements . 4 6.2 Controls on chemical composition 4 6.3 Heat treatment 5 6.4 Cold working or cryoforming . 5 6.5 Failure to meet test requirements 5 7 Design 6 7.1 General requirements
10、. 6 7.2 Calculation of cylindrical shell thickness . 6 7.3 Calculation of convex ends (heads and bases) 6 7.4 Calculation of the concave base ends 9 7.5 Neck design 9 7.6 Foot rings 10 7.7 Neck rings .10 7.8 Design drawing 10 8 Construction and workmanship 10 8.1 General 10 8.2 Wall thickness .10 8.
11、3 Surface imperfections 10 8.4 Ultrasonic examination .11 8.5 Out-of-roundness .11 8.6 Mean diameter .11 8.7 Straightness 11 8.8 Verticality and stability .11 8.9 Neck threads 12 9 Type approval procedure .12 9.1 General requirements 12 9.2 Prototype test 13 9.3 Type approval certificate.14 10 Batch
12、 tests 15 10.1 General requirements 15 10.2 Tensile test .16 10.3 Bend test and flattening test 17 10.4 Impact test .18 10.5 Hydraulic burst test .20 10.6 Intergranular corrosion test .23 11 Tests/examinations on every cylinder .23 11.1 General 23 11.2 Hydraulic test 24 11.3 Hardness test .24 11.4 L
13、eak test .24 11.5 Capacity check 25BS ISO 9809-4:2014ISO 9809-4:2014(E)iv ISO 2014 All rights reserved 12 Certification 25 13 Marking .25 Annex A (informative) Description and evaluation of manufacturing imperfections and conditions for rejection of seamless steel gas cylinders at the time of final
14、inspection by the manufacturer 26 Annex B (normative) Ultrasonic examination .32 Annex C (informative) Type approval certificate 38 Annex D (informative) Acceptance certificate .39 Bibliography .42BS ISO 9809-4:2014ISO 9809-4:2014(E) Foreword ISO (the International Organization for Standardization)
15、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 established has the right to be repres
16、ented 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 standardization. The procedures used to devel
17、op this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/
18、IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during t
19、he development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meanin
20、g of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 58, G
21、as cylinders, Subcommittee SC 3, Cylinder design. ISO 9809 consists of the following parts, under the general title Gas cylinders Refillable seamless steel gas cylinders Design, construction and testing: Part 1: Quenched and tempered steel cylinders with tensile strength less than 1 100 MPa Part 2:
22、Quenched and tempered steel cylinders with tensile strength greater than or equal to 1 100 MPa Part 3: Normalized steel cylinders Part 4: Stainless steel cylinders with tensile strength less than 1 100 MPa ISO 2014 All rights reserved vBS ISO 9809-4:2014ISO 9809-4:2014(E) Introduction The purpose of
23、 ISO 9809 is to provide a specification for the design, manufacture, inspection, and testing of a seamless stainless steel cylinder for worldwide usage. The objective is to balance the design and economic efficiency against international acceptance and universal utility. ISO 9809 aims to eliminate t
24、he concern about climate, duplicate inspections, and restrictions currently existing because of the lack of definitive International Standards. This International Standard should not be construed as reflecting on the suitability of the practice of any nation or region. This part of ISO 9809 has been
25、 prepared to address the general requirements on the design, construction, and initial inspection and test of pressure receptacles of the UN model regulations for the transportation of dangerous goods. 6 It is intended to be used under a variety of regulatory regimes but has been written so that it
26、is suitable for use with the conformity assessment system in paragraph 6.2.2.5 of the above mentioned model regulations.vi ISO 2014 All rights reservedBS ISO 9809-4:2014Gas cylinders Refillable seamless steel gas cylinders Design, construction and testing Part 4: Stainless steel cylinders with an Rm
27、 value of less than 1 100 MPa 1 Scope This part of ISO 9809 specifies the minimum requirements for the material, design, construction and workmanship, manufacturing processes, examinations, and tests at manufacture of refillable seamless stainless steel gas cylinders of water capacities from 0,5 l u
28、p to and including 150 l for compressed, liquefied, and dissolved gases. This part of ISO 9809 is applicable to cylinders with a maximum actual tensile strength, R ma , of less than 1 100 MPa. NOTE If so desired, cylinders of water capacity less than 0,5 l and between 150 l and 500 l can be manufact
29、ured to be in full compliance with this part of ISO 9809. 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 late
30、st edition of the referenced document (including any amendments) applies. ISO 148-1, Metallic materials Charpy pendulum impact test Part 1: Test method ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels Part 2: Ferritic, austenitic and ferritic-austenitic (duplex)
31、 stainless steels Corrosion test in media containing sulfuric acid ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method ISO 7438, Metallic materials Bend test ISO 9329-1, Seamless steel tubes for pressure p
32、urposes Technical delivery conditions Part 1: Unalloyed steels with specified room temperature properties ISO 9712, Non-destructive testing Qualification and certification of NDT personnel ISO 13769, Gas cylinders Stamp marking 3 Terms and definitions For the purposes of this document, the following
33、 terms and definitions apply. 3.1 yield strength stress value corresponding to the 0,2 % proof stress or for austenitic steels in the solution-annealed condition, 1 % proof stress INTERNATIONAL ST ANDARD ISO 9809-4:2014(E) ISO 2014 All rights reserved 1BS ISO 9809-4:2014ISO 9809-4:2014(E) 3.2 quench
34、ing hardening heat treatment in which a cylinder, which has been heated to a uniform temperature above the upper critical point Ac 3of the steel, is cooled rapidly in a suitable medium 3.3 tempering toughening heat treatment which follows quenching, in which the cylinder is heated to a uniform tempe
35、rature below the lower critical point Ac 1of the steel 3.4 solution annealing softening heat treatment for austenitic and duplex stainless steels in which a cylinder is heated to a uniform temperature above the upper critical point (Ac 3 , as defined in ISO 10052) of the steel followed by rapid cool
36、ing 3.5 cryoforming process where the cylinder is subjected to a controlled low-temperature deformation treatment that results in a permanent increase in strength 3.6 batch quantity of up to 200 cylinders plus cylinders for destructive testing of the same nominal diameter, thickness, length, and des
37、ign made successively on the same equipment, from the same cast of steel, and subjected to the same heat treatment for the same duration of time 3.7 test pressure p h required pressure applied during a pressure test Note 1 to entry: It is used for the cylinder wall thickness calculation. 3.8 burst p
38、ressure p b highest pressure reached in a cylinder during a burst test 3.9 design stress factor F ratio of the equivalent wall stress at test pressure (p h ) to guaranteed minimum yield strength (R eg ) 3.10 working pressure settled pressure of a compressed gas at a uniform reference temperature of
39、15 C in a full gas cylinder 4 Symbols A percentage elongation after the fracture for a gauge length of L o a calculated minimum thickness of the cylindrical shell, in millimetres a guaranteed minimum thickness of the cylindrical shell, in millimetres a 1 guaranteed minimum thickness of a concave bas
40、e at the knuckle, in millimetres (see Figure 2) a 2 guaranteed minimum thickness at the centre of a concave base, in millimetres (see Figure 2)2 ISO 2014 All rights reservedBS ISO 9809-4:2014ISO 9809-4:2014(E) b guaranteed minimum thickness at the centre of a convex base, in millimetres (see Figure
41、1) c 1 maximum permissible deviation of burst profile for quenched and tempered cylinders, in millimetres (see Figure 11) c 2 maximum permissible deviation of the burst profile for cryoformed or solution-annealed cylinders with less than 7,5 mm wall thickness, in millimetres (see Figure 12) D nomina
42、l outside diameter of the cylinder, in millimetres (see Figure 1) D f diameter of former, in millimetres (see Figure 6) F design stress factor (variable) (see 3.7) H outside height of the domed part (convex head or base end), in millimetres (see Figure 1) h outside depth (concave base end), in milli
43、metres (see Figure 2) L o original gauge length as defined in ISO 6892, in millimetres (see Figure 5) l overall length of the cylinder, in millimetres (see Figure 3) n ratio of the diameter of the bend test former to the actual thickness of the test piece (t) p b measured burst pressure above the at
44、mospheric pressure, in bar NOTE 1 bar = 10 5Pa = 10 5N/m 2 . p h hydraulic test pressure above the atmospheric pressure, in bar p y observed pressure when the cylinder starts yielding during the hydraulic burst test above the atmos- pheric pressure, in bar r inside knuckle radius, in millimetres (se
45、e Figures 1 and 2) R ea actual value of the yield strength as determined by the tensile test, in MPa (see 10.2) R eg minimum guaranteed value of the yield strength (see 7.1.1) for the finished cylinder, in MPa R ma actual value of the tensile strength as determined by the tensile test, in MPa (see 1
46、0.2) R mg minimum guaranteed value of the tensile strength for the finished cylinder, in MPa S o original cross-sectional area of the tensile test piece in accordance with ISO 6892, in square millimetres t actual thickness of the test specimen, in millimetres t m average cylinder wall thickness at t
47、he position of testing during the flattening test, in millimetres u ratio of the distance between the knife edges or platens in the flattening test to the average cylinder wall thickness at the position of the test V water capacity of the cylinder, in litres w width of the tensile test piece, in mil
48、limetres (see Figure 5) 5 Inspection and testing To ensure that the cylinders conform to this part of ISO 9809, they shall be subject to inspection and testing in accordance with Clauses 9, 10, and 11 by an inspection body (hereafter referred to as “the inspector”) authorized to do so. ISO 2014 All
49、rights reserved 3BS ISO 9809-4:2014ISO 9809-4:2014(E) Equipment used for the measurement, testing, and examination during the production shall be maintained and calibrated within a documented quality management system. NOTE Evaluation of conformity can be performed in accordance with the regulations recognized by the country(ies) where the cylinders are intended to be used. 6 Materials 6.1 General requirements 6.1.1 Materials for the manufacture of gas cylinders shall fall within one
