1、INTERNATIONAL STANDARD IS0 6207 First edition 1992-07-l 5 Seamless nickel and nickel alloy tube Tubes sans soudure en nickel et alliages de nickel Reference number IX) 6207:1992( E) Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reprod
2、uction or networking permitted without license from IHS-,-,-IS0 6207:1992(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0
3、 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, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates
4、closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter- national Standard requires approval by at le
5、ast 75% of the member bodies casting a vote. International Standard IS0 6207 was prepared by Technical Committee ISO/TC 155, Nickel and nickel alloys, Sub-Committee SC 2, Wrought and cast nickel and nickel alloys. Annex A of this International Standard is for information only. 0 IS0 1992 All rights
6、reserved. 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 writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Genkve 20 l Swit
7、zerland Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-INTERNATIONAL STANDARD IS0 6207:1992(E) Seamless nickel and nickel alloy tube 1 Scope 1.1 T
8、his International Standard specifies require- ments for Iround seamless nickel and nickel alloy tube for general purposes as welt as for condenser and heat-exchanger applications in the following size ranges. 1 .I .I Tube for general purposes Cold work.ed: Hot worked: outside diameter 4 mm to 240 mm
9、 outside diameter 38 mm to 240 mm 1 .I .2 Tube for condenser and heat-exchanger applications ISO/TR 7003:1990, Unified format for the designation of metals. Cold worked: maximum outside diameter 80 mm with wall thickness up to and including 5 mm. IS0 8493:1986, Metallic materials - Tube - Drift ex-
10、panding test. 1.2 Dimensional requirements and limiting bend radii are also specified for U-bent heat-exchanger tubes of outside diameter up to and including 26 mm. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this
11、International Standard. At the time of publi- cation, the editions indicated were valid. All stan- dards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of ap- plying the most recent editions of the standards in- d
12、icated bellow. Members of IEC and IS0 maintain registers of currently valid International Standards. 1) To be published. ISO/R 204:1961, Non-interrupted creep testing of steel at elevated temperatures. IS0 6372-1:1989, Nickel and nickel alloys - Terms and definitions - Part I: Materials. IS0 6372-3:
13、1989, Nickel and nickel alloys - Terms and definitions - Part 3: Wrought products and castings. IS0 6507-1:1982, Metallic materials - Hardness test - Vickers test - Part I: HV 5 to HV 100. IS0 6508:1986, Metallic materials - Hardness test - Rockwell test (scales A - 5 - C - D - E - F - G - H - K). I
14、S0 6892:1984, Metallic materials - Tensile testing. ISO/TR 9721:-J), Nickel and nickel alloys - Code of designation based on chemical symbols (To be pub- lished as an ISO/TR type 2). IS0 9722:1992, Nickel and nickel alloys - Composi- tion and forms of wrought products. ASTM E 112:1988, Standard meth
15、ods for determining the average grain size. 3 Definitions For the purposes of this International Standard, the definitions for nickel and nickel alloys in IS0 6372-l and for tube in IS0 6372-3 apply. 1 Copyright International Organization for Standardization Provided by IHS under license with ISONot
16、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 6207:1992(E) 3.1 mean diameter: The average of the maximum and minimum diameters as determined at any cross-section. 3.2 heat: The product of a furnace melt or a number of melts that are mixed prior to casting. 3.3 t
17、hick-wall tube: Tube with a specified wall thickness which is greater than 3 % of the specified outside diameter. 3.4 thin-wall tube: Tube with a specified wall thick- ness which is 3 % or less of the specified outside diameter. 3.5 lot: Tubes of the same cross-sectional dimen- sions from the same h
18、eat, heat treated together or sequentially heat treated in a continuous furnace, but in no case for longer than 16 h of production. When tubes cannot be identified by heat, a lot shall consist of not more than 250 kg of material in the same heat-treated condition and size. 4 Alloy identification For
19、 the purposes of this International Standard, the principles for alloy identification in ISO/TR 7003 and ISO/TR 9721 apply. 5 Ordering information Orders for tubes according to this International Standard shall include the following information. 5.1 The number of this International Standard. 5.2 A s
20、pecification of whether the tube is for gen- eral purposes or for condensers or heat exchangers. 5.3 Quantity (mass, number of pieces, or total length). 5.4 Alloy identification (see table 1). NOTE 1 For alloy identification either the number or the description may be used. 5.5 Alloy temper (see tab
21、le 2). 5.6 Dimensions: outside diameter and nominal wall thickness or outside diameter and minimum wall thickness. 5.7 Optional requirements: a) ends other than plain-cut and deburred; b) c) straightness (see 6.1.7.5); annealed ends for stress-relieved condenser and heat-exchanger tube (see 6.2.3);
22、d) e) samples for product analysis (see 7.1.2); determination of 1 % proof stress (R,o) (see 9.2); pressure test other than standard (see 9.7.2 or 9.8); 9) h) 0 non-destructive testing (see 9.9): individual tube marking (see 10.2); purchaser or third party inspection (see clause 1 I); i) declaration
23、 of conformity (see clause 12). 5.8 Additional information for U-bent tubes. 5.8.1 Specify if tubes are to be U-bent (see Iimita- tions in 6.2.2 to 6.2.5). 5.8.2 Specify if U-bent areas are to be subsequently stress relieved. 58.3 Specify size of radii and length of U-bent tube legs (see 6.2.5.4 and
24、 table 6). 5.8.4 Specify if proof of conformance of wall thick- ness in U-bent area is required (see 6.2.5.3). 5.8.5 Specify if hydrostatic testing is to be applied after bending (see 9.7.4). 6 Requirements Tubes shall meet the following requirements. 6.1 Tubes for general purposes 6.1.1 Composition
25、 Heat analysis shall meet the composition limits specified in table 1. The composition limits do not preclude the possible presence of other elements that are not specified. If the purchasers requirements necessitate limits for any other element that is not specified, these shall be agreed upon betw
26、een the purchaser and the supplier. The percentage content of elements shown “remainder” Zrn 100 %. shall be calculated by difference 2 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license
27、 from IHS-,-,-IS0 6207:1992(E) 6.1.2 Tensile properties Tubes shall have the tensile properties specified in table 2. 6.1.3 Hydrostatic pressure test Any tube exhibiting leaks during hydrostatic testing shall be deemed not to comply with this Inter- national Standard. 6.1.4 Grain size Alloys NW8810/
28、FeNi32Cr21AITi-HC and NW881V FeNi32Cr21AITi-HT shall have an average grain di- ameter of ASTM 5 or coarser (average diameter 0,06 mm or greater). 6.1.5 Creep requirements Alloy NW7;!63/NiCo20Cr20Mo5Ti2AI shall meet the creep requiirements specified in table2, footnote 2). (For sampling for creep tes
29、ting, see 7.3). 6.1.6 Surface quality All tubes shall be clean and free from detrimental surface imperfections. NOTE 2 Where appropriate, the acceptance criteria should be agreed upon by the purchaser and the supplier. 6.1.7 Dimensional tolerances 6.1.7-l Colld-worked tube The wall thickness and out
30、side diameter shall not differ at any point from that specified by more than the tolerance given in table3, except that for thick-wall tube (see 3.3) of outside diameter over 115 mm, the mean diameter shall not ex- ceed the tolerance specified in table3 and indi- vidual measurements shall not exceed
31、 twice the toleranc:e specified in table 3. for thin-wall tube (see 3.4), the mean diameter shall neat exceed the tolerance specified in table3 and individual measurements shall not exceed the tolerance specified in table 3 with the values increased by 0,5 % of the nominal outside diameter. NOTE 3 T
32、olerances for wall thickness are given in table3 for both “nominal” and “minimum” wall require- ments. The appropriate column should be referred to, de- pending upon the product specified. 6.1.7.2 Hot-worked tube For all tubes, the wall thickness and outside diam- eter shall not differ at any point
33、from that specified by more than the tolerance given in table4, except that for tubes of outside diameter over 125 mm, the mean diameter shall not exceed the tolerance specified in table 4, and individual measurements shall not exceed twice the tolerance specified in ta- ble 4. When the minimum wall
34、 thickness is specified, the thickness tolerance+yf5the specified minimum wall thickness shall be 0 %. For tubes supplied with machined outside or inside surfaces, the tolerances on the machined surface shall be z*” mm for the outside diameter; $ mm for the inside diameter. 6.1.7.3 Concentricity For
35、 cold-worked tube and hot-worked tube, the per- missible variations in individual measurements of wall thickness in 6.1.7.1 and 6.1.7.2 include con- centricity. 6.1.7.4 Length Tube ordered according to a specified length shall not differ from that length by more than the appro- priate tolerance give
36、n in table 5. 6.1.7.5 Straightness Tubes shall be free from kinks. NOTE 4 Where appropriate, the acceptance criteria should be agreed upon by the purchaser and the supplier. 6.2 Tubes for condensers and heat-exchangers In addition to the requirements of 6.1, l.ubes for con- densers and heat-exchange
37、rs shall meet the follow- ing requirements. 6.2.1 Materials The requirements given in 6.2.2 to 6.2.5.5 apply only to the following materials in their appropriate heat- treated conditions (see table 2): NW2200/Ni99,0 NW2201/Ni,99,0-LC NW6600/NiCrl5Fe8 NW6690/NiCr29Fe9 NW6625/NiCr22MogNb NW4400/NiCu30
38、 NW8825/NiFe30Cr21Mo3 NW8800/FeNi32Cr21AITi NW8810/FeNi32Cr21AITi-HC NW8811/FeNi32Cr21AITi-HT 3 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 6207:1992(E) 6.2.2 Tub
39、e size and bending radii limitations for U-bent tubes (see table 6) 6.2.3 Hardness of annealed ends of stress-relieved tubes When stress-relieved condenser or heat-exchanger tubes are furnished with annealed ends, the Rockwell or Vickers hardness of the ends after annealing shall not exceed the valu
40、es specified in table 7. tube at the apex of the bend, measuring the wall thickness at the cross-section of this apex and com- paring the measured value with the calculated value of 6,. 6.2.5.4 Length of U-bent tube legs The length of the tube legs, measured from the point of tangency of the bend to
41、 the end of the tube leg, shall be within the tolerance specified in tableg. The difference in the length of the tube legs shall be not greater than 4 mm. 6.2.4 Drift expanding 6.2.5.5 Squareness of ends The tube shall be expanded without rupture until the outside diameter has been increased by 30 %
42、. The end of any tube shall not depart from square by more than the amounts shown in table 10. 6.2.5 Tolerances for U-bent tubes 7 Sampling 6.2.5.1 Leg spacing 7.1 Chemical analysis The leg spacing, measured between the points of tangency of the bend to the legs, shall not vary from the value: (2r-
43、specified tube outside diameter) by more than the amounts shown in table8, where r is the specified centreline bend radius. 6.2.5.2 Diameter of the tube in U-bent section Neither the major nor minor outside diameter of the tube, at any one cross-section included within the points of tangency of the
44、bend, shall deviate from the nominal diameter prior to bending by more than 10 %. 6.2.5.3 Wail thickness of tube in U-bent section The wall thickness of the tube at the apex of the U- bent section shall be not less than the value deter- mined by the following equation: 4 = mw, + D) where is the thic
45、kness after bending, in milli- metres; 6 is the minimum permissible thickness of tube wall prior to bending, in millimetres; r is the centreline bend radius, in milli- metres; D is the nominal outside diameter of the tube, in millimetres. When specified by the purchaser, proof of conform- ance to th
46、is requirement shall be obtained by bend- ing a tube specimen, representative of the material offered, to the scheduled radius of bend, cutting the 7.1.1 Representative heat analysis samples shall be taken during pouring or subsequent processing. 7.1.2 Product analysis samples shall be taken from th
47、e finished product. 7.2 Tensile testing 7.2.1 Unless otherwise indicated in table2, tensile test specimens shall be taken from material in the final heat-treated condition, and tested in the longi- tudinal direction. 7.2.2 In the case of stress-relieved tubes furnished with annealed ends, the tensil
48、e test specimen shall be taken from tubes in the stress-relieved condition prior to annealing. 7.3 Creep testing Creep test specimens may be taken from the fin- ished product of alloy NW7263/ NiCo20Cr20Mo5Ti2AI, or at an intermediate stage of processing, and shall be tested in the longitudinal direc
49、tion. 8 Number of tests 8.1 Chemical analysis One test per heat. 8.2 Tensile test One test per lot. 4 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 $207:1992(E) 8.3 Creep test One test per lot. 8.4 Drift expanding test A drift expanding test shall be performed on one end of each mill length of condenser and heat exchanger tube. 8.5 Pre
