1、BSI Standards PublicationBS ISO 18762:2016Tubes of titanium and titaniumalloys Welded tubesfor condensers and heatexchangers Technicaldelivery conditionsBS ISO 18762:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 18762:2016.The UK participation in its pre
2、paration was entrusted to TechnicalCommittee NFE/35, Light metals and their alloys.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its co
3、rrectapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 83264 2ICS 27.060.30; 77.150.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy
4、 and Strategy Committee on 30 April 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 18762:2016 ISO 2016Tubes of titanium and titanium alloys Welded tubes for condensers and heat exchangers Technical delivery conditionsTubes en titane et alliage de titane Tubes s
5、ouds pour condenseurs et changeurs de chaleur Conditions techniques de livraisonINTERNATIONAL STANDARDISO18762First edition2016-04-01Reference numberISO 18762:2016(E)BS ISO 18762:2016ISO 18762:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll ri
6、ghts 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 written permission. Permission can be requested from
7、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 18762:2016ISO 18762:2016(E)Foreword iv1 Scope . 12 Normativ
8、e references 13 Information to be supplied by the purchaser. 13.1 General information . 13.2 Options . 24 Manufacturing . 25 Requirements 25.1 General . 25.2 Chemical composition 25.3 Tensile properties . 45.4 Flattening test 45.5 Reverse flattening test 55.6 Drift-expanding (flaring) test . 55.7 No
9、n-destructive tests 65.7.1 General 65.7.2 Pneumatic test . 65.7.3 Eddy current test . 65.7.4 Ultrasonic test 65.8 Surface conditions, imperfections and defects 75.9 Dimensions and tolerances 75.10 Finish . 76 Inspection 86.1 Types of inspection and inspection documents . 86.1.1 General 86.1.2 Inspec
10、tion documents . 86.2 Specific inspection . 86.2.1 Inspection frequency 86.2.2 Samples and test pieces for product analysis . 86.2.3 Samples and test pieces for mechanical tests . 86.2.4 Test methods . 97 Rounding-off procedure 98 Reference test and analysis . 99 Rejection 1010 Marking .1010.1 Gener
11、al 1010.2 Tube marking 1011 Packaging 1012 Certification 10Bibliography .11 ISO 2016 All rights reserved iiiContents PageBS ISO 18762:2016ISO 18762:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The
12、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 represented on that committee. International organizations, governmental and non-gover
13、nmental, 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 develop this document and those intended for its further maintenance are described in
14、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/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the pos
15、sibility 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 the development of the document will be in the Introduction and/or on the ISO list
16、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 meaning of ISO specific terms and expressions related to conformity assessment, as well as
17、 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 79, Light metals and their alloys, Subcommittee SC 11, Titanium.iv ISO 2016 All rights re
18、servedBS ISO 18762:2016INTERNATIONAL STANDARD ISO 18762:2016(E)Tubes of titanium and titanium alloys Welded tubes for condensers and heat exchangers Technical delivery conditions1 ScopeThis International Standard specifies requirements for the manufacture of welded tubes made from titanium or titani
19、um alloys, for use in condensers and heat exchangers.2 Normative referencesThe 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 latest edi
20、tion of the referenced document (including any amendments) applies.ISO 68921, Metallic materials Tensile testing Part 1: Method of test at room temperatureISO 8492, Metallic materials Tube Flattening testISO 8493, Metallic materials Tube Drift-expanding testISO 10474, Steel and steel products Inspec
21、tion documentsISO 25902-1, Titanium pipes and tubes Non-destructive testing Part 1: Eddy-current examinationISO 25902-2, Titanium pipes and tubes Non-destructive testing Part 2: Ultrasonic testing for the detection of longitudinal imperfectionsASTM E29, Practice for Using Significant Digits in test
22、Data to Determine Conformance with SpecificationsASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel ProductsASTM E120, Test methods for Chemical Analysis of Titanium and Titanium AlloysASTM E1409, Test method for determination of oxygen and nitrogen in titanium and tita
23、nium alloys by the inert gas fusion techniqueASTM E1447, Test method for determination of hydrogen in titanium and titanium alloys by the inert gas fusion thermal conductivity/ Infrared detection methodASTM E1941, Standard Test Method for Determination of Carbon in Refractory and Reactive Metals and
24、 their Alloys by Combustion Analysis3 Information to be supplied by the purchaser3.1 General informationThe purchase order shall include the following information:a) quantity (e.g. total mass or total length of tube);b) grade number;c) outside diameter and wall thickness (minimum or average); ISO 20
25、16 All rights reserved 1BS ISO 18762:2016ISO 18762:2016(E)d) length and type of length (random or fixed lengths);e) method of manufacture and finish;f) non-destructive tests;g) packaging;h) inspection;i) certification.3.2 OptionsA number of options are specified in this International Standard and th
26、ese are listed below. In the event that the purchaser does not indicate a wish to implement any of these options at the time of enquiry and order, the tubes shall be supplied in accordance with the basic specification.a) Restrictive chemistry (see 5.2).b) Product analysis (see 5.2).c) Special mechan
27、ical properties (see 5.3).4 ManufacturingThe welded tube shall be made from flat-rolled strips by an automatic arc-welding, a laser welding process and other welding processes. Use of a filler material is not permitted. Butt-welds are absolutely forbidden.After welding, the tubes shall be annealed a
28、t a temperature between 500 C to 800 C when agreed upon between the manufacturer and purchaser and so stated in the purchase order.5 Requirements5.1 GeneralWhen supplied in the delivery condition indicated in 4.1 and inspected in accordance with Clause 6, the tubes shall conform to the requirements
29、of this International Standard.5.2 Chemical compositionThe titanium and titanium alloys shall conform to the chemical requirements prescribed in Table 1.The elements listed in Table 1 are either intentional alloy additions or elements that are inherent to the manufacture of titanium sponge, ingot, o
30、r mill product.The content of any element intentionally added to the heat during melting shall be reported.When agreed upon between the producer and the purchaser and specified in the purchase order, other specific residual elements not listed in Table 1 may be added; their content shall be reported
31、.2 ISO 2016 All rights reservedBS ISO 18762:2016ISO 18762:2016(E)Table 1 Chemical compositionChemical composition in % by massGradeDesignationNitrogenmax.Carbonmax.Hydro-genmax.Ironmax.Oxygen max.Alu-mini-umVana-diumRuthe-niumPalladiumMo-lybde-numNickelChro-miumCobaltResiduals max.Titani-umEachTotal
32、1CPTi2400,030,080,0150,200,180,10,4balance1HCPTi2700,030,080,0150,200,180,10,4balance2LCPTi3400,030,080,0150,250,200,10,4balance2CPTi3450,030,080,0150,300,250,10,4balance3CPTi4500,050,080,0150,300,350,10,4balance3HCPTI4800,050,080,0150,300,350,10,4balance7LTiCR0,18Pd3400,030,08,0,0150,250,200,12 to
33、0,250,10,4balance7TiCR0,18Pd3450,030,080,0150,300,250,12 to 0,250,10,4balance9TiA3Al2,5V0,030,080,0150,250,152,5 to 3,52,0 to 3,00,10,4balance12TiCR0,3Mo0,75Ni4830,030,080,0150,300,250,2 to 0,40,6 to 0,90,10,4balance16LTiCR0,06Pd3450,030,080,0150,300,250,04to0,080,10,4balance16TiCR0,06Pd3450,030,080
34、,0150,300,250,04to0,080,10,4balance26TiCR0,11Ru3450,030,080,0150,300,250,08 to 0,140,10,4balance31TiCR0,05Pd0,-5Co3450,030,080,0150,300,250,04to0,080,20 to 0,800,10,4balance33TiCR0,015Pd0,03Ru0.45Ni0.15Cr3450,030,080,0150,300,250,02 to 0.040,01 to 0,020,35to 0,550.10 to 0,200,10,4balance37TiCR0,1,5A
35、l3450,030,080,0150,300,251,0 to 2,00,10,4balance ISO 2016 All rights reserved 3BS ISO 18762:2016ISO 18762:2016(E)5.3 Tensile propertiesThe room temperature tensile properties of the tubes shall conform to the requirements prescribed in Table 2.Mechanical properties for conditions other than those gi
36、ven in this table may be established by agreement between the manufacturer and the purchaser.Table 2 Mechanical properties at room temperatureGrade DesignationTS MPaYS or 0,2 %OffsetaMPaElongation 50 mm min %min max min max1 CPTi240 240 138 310 241H CPTi270 270 410 242L CPTi340 340 510 232 CPTi345 3
37、45 275 450 203 CPTi450 450 380 550 183H CPTi480 480 620 187L TiCR0,18Pd340 340 510 237 TiCR0,18Pd345 345 275 450 209 TiA3Al2,5V 620 483 1212 TiCR0,3Mo0,75Ni483 483 345 1216L TiCR0,06Pd345 345 515 2016 TiCR0,06Pd345 345 275 450 2026 TiCR0,11Ru345 345 275 450 2031 TiCR0.05Pd0.5Co345 345 515 2033 TiCR0
38、,015P-d0,03Ru0,45Ni0,15Cr345345 2037 TiCR0,1,5Al345 345 215 450 20aYS or 0,2 %Offset is specified for the tubes annealed and no specified property for as deformed tubes.5.4 Flattening testThe test shall be carried out in accordance with ISO 8492.The tubes shall be flattened under a load applied grad
39、ually at room temperature until the distance between the load platens reaches the value H calculated by Formula (1):HetetD=+()+1(1)whereH is the distance between platens under load, in millimetres;t is the specified wall thickness, in millimetres;D is the specified diameter, in millimetres;e is a co
40、nstant, the value described in Table 3.4 ISO 2016 All rights reservedBS ISO 18762:2016ISO 18762:2016(E)Table 3 constant value of “e”Grade Designation Constant e1 CPTi240 0,071H CPTi270 0,072L CPTi340 0,072 CPTi345 0,073 CPTi450 0,04(OD 25,4 mm) 0,06(OD 25,4 mm)3H CPTi480 0,04(OD 25,4 mm) 0,06(OD 25,
41、4 mm)7L TiCR0,18Pd340 0,077 TiCR0,18Pd345 0,079 TiA3Al2,5V To be negotiated12 TiCR0,3Mo0,75Ni483 To be negotiated16L TiCR0,06Pd345 0,0716 TiCR0,06Pd345 0,0726 TiCR0,11Ru345 0,0731 TiCR0.05Pd0.5Co345 0,0733 TiCR0,015P-d0,03Ru0,45Ni0,15Cr3450,0737 TiCR0,1,5Al345 0,03The weld shall be positioned on the
42、 90 or 270 centreline during loading so as to be subjected to the maximum stress.After testing, the test piece shall be free from cracks or breaks. Examination for cracking shall be by the unaided eye. However, slight incipient cracks at its edges shall not be regarded as justification for rejection
43、.However, when low D-to-t ratio tubular products are tested, because the strain imposed due to geometry is unreasonably high on the inside surface at the 6 oclock and 12 oclock locations, cracks at these locations shall not be cause for rejection if the D-to-t ratio is less than ten (10).The results
44、 from all calculations are to be rounded to two decimal places.5.5 Reverse flattening testTubes shall be subjected to a reverse flattening test in accordance with ASTM A370 supplementary requirement II. A section of the tube, approximately 100 mm (4 in) long, that is slit longitudinally 90 either si
45、de of the weld, shall be opened and flattened with the weld at the point of maximum bend. No cracking is permitted.5.6 Drift-expanding (flaring) testThe test shall be carried out in accordance with ISO 8493.The tube section, approximately 100 mm (4 in), shall be expanded with a 60 conical tool, unti
46、l the percentage increase in inside diameter shown in Table 4 is reached. After testing, the test piece shall be free from cracks or breaks. Examination for cracking shall be by the unaided eye. However, slight incipient cracks at its edges shall not be regarded as justification for rejection. ISO 2
47、016 All rights reserved 5BS ISO 18762:2016ISO 18762:2016(E)Table 4 Drift expanding (flaring) requirementsGrade DesignationExpansion of inside diameter min%1 CPTi240 221H CPTi270 142L CPTi340 142 CPTi345 203 CPTi450 173H CPTi480 147L TiCR0,18Pd340 147 TiCR0,18Pd345 209 TiA3Al2,5V 2012 TiCR0,3Mo0,75Ni
48、483 1716L TiCR0,06Pd345 1416 TiCR0,06Pd345 2026 TiCR0,11Ru345 2031 TiCR0.05Pd0.5Co345 1433 TiCR0,015P-d0,03Ru0,45Ni0,15Cr3451437 TiCR0,1,5Al345 145.7 Non-destructive tests5.7.1 GeneralThe tubes shall be tested using a pneumatic test together with an eddy current test and an ultrasonic test.Any tubes
49、 showing an indication in excess of that obtained from the calibration standard shall be set aside and be subject to rework, retest or rejection. A tube thus set aside may be examined further for confirmation of the presence of a defect and may be resubmitted for inspection if no defect is found. Any tubes may also be resubmitted for inspection if reworked so as to remove the defect within the specified diameter and wall thickness tolerances (rework by weld repair is not permitted).5
