1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Metallic materials Tube ring hydraulic pressure testBS ISO 15363:2017 ISO 2017Metallic materials Tube ring hydraulic pressure testMatriaux mtalliques Essai dexpansion hydraulique sur anneau tubulaireINTERNATIONAL STANDA
2、RDISO15363Second edition2017-07Reference numberISO 15363:2017(E)National forewordThis British Standard is the UK implementation of ISO 15363:2017.The UK participation in its preparation was entrusted to Technical Committee ISE/101/2, Ductility testing.A list of organizations represented on this comm
3、ittee can be obtained 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 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 96327 8ICS 77.040
4、.10Compliance with 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 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 15363:2017
5、 ISO 2017Metallic materials Tube ring hydraulic pressure testMatriaux mtalliques Essai dexpansion hydraulique sur anneau tubulaireINTERNATIONAL STANDARDISO15363Second edition2017-07Reference numberISO 15363:2017(E)BS ISO 15363:2017ISO 15363:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED D
6、OCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced 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 writt
7、en permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 15363:2017I
8、SO 15363:2017(E)Foreword iv1 Scope . 12 Symbols 13 Principle 14 Apparatus . 25 Test ring . 35.1 Shape and position 35.2 Determination of dimensions 46 Test procedure 57 Hoop strength evaluation 68 Test report . 7Annex A (informative) Proof and reduced section testing . 8Annex B (informative) Compari
9、son of symbols and designations used for steel tubes 9 ISO 2017 All rights reserved iiiContents PageBS ISO 15363:2017ISO 15363:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Int
10、ernational 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 represented on that committee. International organizations, governmental and non-governmental, in liaison w
11、ith 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 develop this document and those intended for its further maintenance are described in the ISO/IEC Directive
12、s, 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/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some
13、 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 the development of the document will be in the Introduction and/or on the ISO list of patent declarat
14、ions 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 voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity as
15、sessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .htmlThis document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcomm
16、ittee SC 2, Ductility testing.This second edition cancels and replaces the first edition (ISO 15363:2000), of which it constitutes a minor revision.The main changes to the previous edition are: Addition of the comparison of symbols and designations used for steel tubes as Annex B for harmonizing EN
17、10275:1999.Annex A and Annex B of this document are for information only.iv ISO 2017 All rights reservedBS ISO 15363:2017INTERNATIONAL STANDARD ISO 15363:2017(E)Metallic materials Tube ring hydraulic pressure test1 ScopeThis document specifies the ring hydraulic pressure test for metallic tubes. It
18、is generally applied to tubes with an outside diameter greater than 120 mm and outside diameter to thickness ratio of not less than 20.The objective of this test is to ascertain the value of the hoop stress required to produce a specified total circumferential (hoop) strain.2 SymbolsSymbols and corr
19、esponding designations are given in Table 1.Table 1 Symbols and designationsSymbol Designation Unita Measured tube test ring thickness mmAtSpecified total circumferential strain %d Measured outside diameter of the tube test ring mml Length of tube test ring mmp Hydrostatic pressure to produce the sp
20、ecified total circumferential strain MPaRAtHoop strength at the specified total strain MPaNOTE For symbols used in standards for steel tubes, please see Annex B.3 PrincipleUnrestrained expansion of the test ring between two platens, under internal hydraulic pressure; the outer circumference of the t
21、ube is the effective test piece gauge length.The test is carried out on a test piece taken from a welded or seamless tube of thickness up to a limit dependent upon the capacity of the machine and the strength of the tube (see Figure 1). All sharp edges are removed from product machined surfaces befo
22、re testing. Where the hydraulic pressure required to produce the specified circumferential strain exceeds the capacity of the test machine, modified tests may be carried out as described in Annex A.The test is specified when a measure of the hoop strength is required which is not influenced by cold
23、forming and residual stress introduced when flattening a standard tensile test piece. The standard tensile test is necessary, however, when tensile strength and elongation measurements are required. ISO 2017 All rights reserved 1BS ISO 15363:2017ISO 15363:2017(E)Dimensions in millimetresKeya Toleran
24、ce on l: 0,25 mm; l is commonly taken as 76 mm.b Maximum deviation from normal.c Both faces to be machined parallel with fine turned or ground finish.d Measured outside diameter of the tube test ring.Figure 1 Test ring dimensions and tolerances4 Apparatus4.1 Testing machine, which shall be capable o
25、f allowing the test ring to expand freely without imposing any end restraint. This shall be achieved by leaving a small gap between the test piece and the top platen. Pressure loss during testing shall be prevented by the use of a flexible seal.A typical testing machine is shown schematically in Fig
26、ure 2.4.2 Platens. To reduce to a minimum any friction between the test piece, platens and inner die, the platens shall be parallel and have a fine turned or ground finish. Prior to each test, friction at the contact surfaces shall be further minimized either by the use of a lubricant, such as graph
27、ited grease, or by the use of PTFE (polytetrafluorethylene) sheet. The platens shall be inspected regularly and any ridges that develop shall be removed.2 ISO 2017 All rights reservedBS ISO 15363:2017ISO 15363:2017(E)4.3 Test ring, to which stress shall be applied by means of a pressurized fluid. Pr
28、ovision shall be made to remove any air in the system through a bleed line.WARNING When carrying out the test, precautions should be taken for ensuring the safety of the operator.Key1 circumferential measuring device, e.g. steel tape or roller chain2 inner die3 top platen4 small gap5 test ring6 rubb
29、er seal or gasket7 pressurizing fluid8 bottom platen9 clamping forceFigure 2 Schematic diagram of testing machine (with installed test ring)5 Test ring5.1 Shape and position5.1.1 Prior to separation from the main body of the tube, the test ring shall be marked with a unique identity.5.1.2 The test r
30、ing may be prepared from an oversize flame cut sample. Final preparation shall be by a cold machining process to ensure removal of any heat affected zones. The machined edges shall have a fine turned or ground finish and be free from burrs.5.1.3 The dimensions and tolerances for the test piece are g
31、iven in Figure 1. The machined edges shall be parallel and normal to the axis of the tube to within 0,15 mm measured across the diameter. ISO 2017 All rights reserved 3BS ISO 15363:2017ISO 15363:2017(E)5.2 Determination of dimensions5.2.1 The outside diameter of the test ring shall be calculated fro
32、m measurement of the tube circumference, for example using a flexible steel tape. The maximum tolerance on the accuracy of this measurement shall be 1 mm.5.2.2 The wall thickness shall be determined by calculating the mean of eight measurements taken at approximately 45 intervals around the test pie
33、ce, excluding the weld region of welded tubes (see Figure 3). The measuring device shall be capable of measuring thickness to an accuracy greater than 0,025 mm.5.2.3 All tube diameter and thickness measurements of the test ring shall be fully documented.KeyaAdjacent to the weld.Figure 3 Wall thickne
34、ss measurement positions4 ISO 2017 All rights reservedBS ISO 15363:2017ISO 15363:2017(E)6 Test procedure6.1 The test procedure consists of applying pressure and measuring circumferential extension.6.2 Circumferential extension of the test ring shall be measured during pressurization as follows.The e
35、quipment for measuring the change of circumference, for example steel tape or roller chain extensometer, shall be wrapped around the test ring perimeter at the mid-point, crossing at the weld.An example of the use of a steel tape is shown in Figure 4. The separation between the two parallel portions
36、 of the measuring device shall be between 1,5 mm and 3 mm.Key1 tube under test2 measuring device, e.g. steel tapeFigure 4 Measuring device position for extension measurementWhen a steel tape is used, friction shall be minimized by coating both the tape and test ring circumference with a suitable lub
37、ricant. Change in circumference shall be measured by a suitable mechanical or electrical device accurate to within 0,25 mm.6.3 The equipment for measuring the increase in circumference shall be wrapped around the test ring before application of the internal pressure.6.4 The tolerance for the measure
38、ment of internal pressure shall be within 1 %. Accuracy of the pressure measurement device shall be verified, for example by comparison with dead weight test equipment, at the commencement of a sequence of testing and not less than once per year during the testing period. ISO 2017 All rights reserve
39、d 5BS ISO 15363:2017ISO 15363:2017(E)6.5 The rate of strain shall not exceed 0,2 % min-1.6.6 The pressure and circumferential extension output signals shall be recorded, for example on an X-Y plotter, and related to the test piece identity.7 Hoop strength evaluation7.1 A typical test pressure-circum
40、ferential extension record is shown in Figure 5.7.2 The pressure p corresponding to the specified total circumferential strain shall be determined from the test record.7.3 For tubes where d/a 20, the hoop strength at the specified total strain shall be calculated from the formulaRpdaAt=2For tubes wi
41、th d/a 20, the hoop strength calculated from this formula becomes increasingly inaccurate and quantitative results should be used with caution. Factors such as strain hardening could have a significant effect on the validity of the calculated strength.NOTE The specified total circumferential strain
42、is calculated from the circumferential extension divided by the original test ring circumference.Figure 5 Typical pressure/extension test record6 ISO 2017 All rights reservedBS ISO 15363:2017ISO 15363:2017(E)8 Test reportThe test report shall contain at least the following information:a) reference t
43、o this document, i.e. ISO 15363;b) identification of test ring, e.g. cast number/tube number /identification number;c) material specification, if known;d) diameter and wall thickness of the tube;e) length of the tube test ring;f) calculated hoop strength at specified total circumferential strain;g)
44、reference to an alternative test method used, when appropriate (see Annex A). ISO 2017 All rights reserved 7BS ISO 15363:2017ISO 15363:2017(E)Annex A (informative) Proof and reduced section testingA.1 Proof testingThis method may be used where the stress necessary to produce the specified circumfere
45、ntial extension has not been achieved, but where the stress in the test ring exceeds the specified minimum hoop strength requirement. In this case the percentage circumferential expansion achieved should be quoted in the report.A.2 Reduced section testingThis method enables the stress corresponding
46、to the specified circumferential extension to be achieved by a reduction in the test ring thickness. This reduction can be effected by machining the inside and/or outside of the tube. To ensure that the full thickness is represented, two or possibly three determinations should be carried out after m
47、achining:(i) inside;(ii) outside;(iii) both diameters.Details of all test piece locations and dimensions relative to the full thickness ring section should be included in the report.8 ISO 2017 All rights reservedBS ISO 15363:2017ISO 15363:2017(E)Annex B (informative) Comparison of symbols and design
48、ations used for steel tubesTable B.1 Comparison of symbols and designations used for steel tubesSymbol Designation Unita T aMeasured tube test ring thickness mmAtx aSpecified total circumferential strain %d D aMeasured outside diameter of the tube test ring mml L aLength of the tube test ring mmp p
49、aHydrostatic pressure to produce the specified total circumferential strain MPaRAtRtaHoop strength at the specified total strain MPaaThese symbols are also used for these parameters in standards for steel tubes. ISO 2017 All rights reserved 9BS ISO 15363:2017ISO 15363:2017(E) ISO 2017 All rights reservedICS 77.040.10Price based on 9 pagesBS ISO 15363:2017This page deliberately left blank ISO 15363:2017(E) ISO 2017 All rights reservedICS 77.040.10Price based on 9 pagesThis page deliberate
