BS 6362-1990 Specification for stainless steel tubes suitable for screwing in accordance with BS 21 Pipe threads for tubes and fittings where pressure-tight joints are made on the .pdf

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1、BRITISH STANDARD BS6362:1990 ISO7598:1988 Specification for Stainless steel tubes suitable for screwing in accordance with BS21 “Pipe threads for tubes and fittings where pressure-tight joints are made on the threads” UDC 669.14.018.8-462BS6362:1990 This British Standard, having been prepared under

2、the directionof the Piping SystemsComponents StandardsPolicy Committee, waspublished under the authorityof the Board ofBSIandcomes into effect on 29 June1990 BSI10-1999 First published March1984 First revision June1990 The following BSI references relate to the work on this standard: Committee refer

3、ence PSE/8 Draft for comment81/75745 DC ISBN 0 580 18285 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Piping Systems Components Standards Policy Committee (PSE/-) to Technical Committee PSE/8, upon which the following bodies were re

4、presented: Adhesive Tape Manufacturers Association British Compressed Air Society British Gas plc British Malleable Tube Fittings Association British Steel Industry British Valve and Actuator Manufacturers Association British Welded Steel Tube Association Food and Drink Federation Institution of Civ

5、il Engineers Institution of Gas Engineers Institution of Water and Environmental Management (IWEM) Mechanical Handling Engineers Association Stainless Steel Fabricators Association of Great Britain TI (Group Services) Ltd. Water Authorities Association Water Companies Association Water Research Cent

6、re Wrought Fitting Makers Association Amendments issued since publication Amd. No. Date of issue CommentsBS6362:1990 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Calculation of masses 1 4 General requirements 1 5 Mate

7、rial 1 6 Appearance 1 7 Dimensions 1 8 Tolerances 2 9 Testing 3 10 Designation 3 11 Certificate 3 Annex A (informative) Bibliography 4 Table 1 Dimensions and masses per unit length 2 Table 2 Tolerances on outside diameter 2 Publications referred to Inside back coverBS6362:1990 ii BSI 10-1999 Nationa

8、l foreword This British Standard has been prepared under the direction of the Piping Systems Components Standards Policy Committee and is identical with ISO7598:1988 “Stainless steel tubes suitable for screwing in accordance with ISO7-1”, prepared by Technical Committee ISO/TC5, ferrous metal pipes

9、and metallic fittings, of the International Organization for Standardization (ISO). It supersedes BS6362:1984 which is withdrawn. The Technical Committee has reviewed the provisions of ISO404:1981, ISO1127:1980, ISO2604-2:1975, ISO2604-5:1978, ISO4144:1979, ISO6708:1980 and ISO9302 1)to which refere

10、nce is made in the text, and has decided that they are acceptable for use in conjunction with this standard. ISO2604-2 is related to the following British Standards BS3059, Specification for steel boiler and superheater tubes. Part1:1987, Specification for low tensile carbon steel tubes without spec

11、ified elevated temperature properties. Part2:1978, Carbon, alloy and austenitic stainless steel tubes with specified elevated temperature properties. BS3601:1987, Specification for carbon steel pipes and tubes with specified room temperature properties for pressure purposes. BS3602, Specification fo

12、r steel pipes and tubes for pressure purposes: carbon and carbon manganese steel with specified elevated temperature properties. Part1:1987, Specification for seamless and electric resistance welded including induction welded tubes. BS3604:1978, Specification for steel pipes and tubes for pressure p

13、urposes:ferritic alloy steel with specified elevated temperature properties. BS3606:1978, Specification for steel tubes for heat exchangers. ISO2604-5 is related to the following British Standard BS3606:1978, Specification for steel tubes for heat exchangers. Cross-references International Standard

14、Corresponding British Standard ISO7-1:1982 BS21:1985 Specification for pipe threads for tubes and fittings where pressure-tight joints are made on the threads (metric dimensions) (Technically equivalent) ISO65:1981 BS1387:1985 Specification for screwed and socketed steel tubes and tubulars and for p

15、lain end steel tubes suitable for welding or for screwing to BS21 pipe threads (Technically equivalent) ISO4200:1982 BS3600:1988 Specification for dimensions and massesper unit length of welded and seamless steel pipes and tubes for pressure purposes (Technically equivalent) 1) In preparation.BS6362

16、:1990 BSI 10-1999 iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages Th

17、is document comprises a front cover, an inside front cover, pagesi toiv, pages1to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS6

18、362:1990 BSI 10-1999 1 1 Scope This International Standard specifies the dimensions and characteristics of seamless and welded austenitic stainless steel tubes with dimensions corresponding to the medium series of ISO65. The tubes may be delivered with plain ends or threaded in accordance with ISO7-

19、1 and fitted with one screwed socket. The limits of application for these tubes may be laid down on a national basis in accordance with the regulations in force in each country. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provis

20、ions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standard

21、s indicated. Members of IEC and ISO maintain registers of currently valid International Standards. ISO7-1:1982, Pipe threads where pressure-tight joints are made on the threads Part1:Designation, dimensions and tolerances. ISO404:1981, Steel and steel products General technical delivery requirements

22、. ISO2604-2:1975, Steel products for pressure purposes Quality requirements Part2:Wrought seamless tubes. ISO2604-5:1978, Steel products for pressure purposes Quality requirements Part5:Longitudinally welded austenitic stainless steel tubes. ISO4144:1979, Stainless steel fittings threaded to ISO7-1.

23、 ISO9302:, Seamless and welded (except submerged arc welded) steel tubes for pressure purposes Electromagnetic testing for verification of hydraulic leak-tightness 2) . 3 Calculation of masses The values for masses per unit length for plain end tubes have been calculated on the basis of the mean of

24、the maximum and minimum diameters given in Table 2 and using the basis for calculation as given in ISO4200 and have been modified for screwed and socketed tubes by an amount based on the mean mass of a tube of length7m with a socket. 4 General requirements 4.1 The tubes shall be made by a seamless o

25、r welded process. 4.2 The tubes shall be supplied in the heat-treated condition. The heat-treatment procedure shall consist of heating the tubes at950 C to1100 C and rapidly cooling. 4.3 The tubes shall be suitable for fabrication and shaping by normal techniques. 5 Material The steel shall have a c

26、hemical composition and mechanical properties in accordance with ISO2604-2 and ISO2604-5. These standards cover the following steels: TS46, TS47, TS58, TS61; TW 46, TW 47, TW 58, TW 61. 6 Appearance 6.1 The tubes shall have smooth internal and external surfaces, the degree of smoothness depending on

27、 the method of manufacture. Unless otherwise agreed in the order, the internal weld bead shall not be removed. The tubes shall have a workmanlike finish but small imperfections are permissible provided that the thickness remains within the lower tolerance limit. 6.2 Surface imperfections may be dres

28、sed provided that the thickness after dressing remains within the lower tolerance limit. 6.3 Peening of surface defects is not permitted. 6.4 The tubes shall be cut nominally square to the axis of the tube, and shall be free from excessive burrs and shall be reasonably straight. 7 Dimensions 7.1 Mai

29、n data The nominal size DN (see ISO6708), the thread designation, the specified outside diameter, the thickness and the masses per unit length are given in Table 1. 2) To be published.BS6362:1990 2 BSI 10-1999 Table 1 Dimensions and masses perunitlength 7.2 Thread All screwed tubes shall have thread

30、s in accordance with the requirements of ISO7-1. The tubes shall be screwed with taper threads and, unless otherwise specified, fitted with one screwed socket. 7.3 Sockets The sockets shall comply with the requirements of ISO4144, socketM2. 7.4 Random lengths Unless otherwise specified, random lengt

31、hs shall be between4m and7m. 8 Tolerances 8.1 On outside diameter Tolerances on outside diameter are given in Table 2. Table 2 Tolerances on outside diameter DN Designation of thread Outside diameter a D Thickness T Mass per unit length M mm mm Plain end kg/m Threaded socketed kg/m 6 8 10 15 20 25 3

32、2 40 50 65 80 100 125 150 1/8 1/4 3/8 1/2 3/4 1 11/4 11/2 2 21/2 3 4 5 6 10,2 13,5 17,2 21,3 26,9 33,7 42,4 48,3 60,3 76,1 88,9 114,3 139,7 165,1 b 2 2,3 2,3 2,6 2,6 3,2 3,2 3,2 3,6 3,6 4 4,5 5 5 0,41 0,644 0,858 1,22 1,58 2,45 3,14 3,61 5,11 6,54 8,5 12,4 16,9 20 0,413 0,651 0,866 1,24 1,6 2,49 3,1

33、9 3,68 5,22 6,72 8,75 12,7 17,4 20,7 a See Table 2 and 8.1. b This diameter is not listed in ISO4200 but the mass per unit length for this tube has been calculated according to the rules laid down in clause3. Dimensions in millimetres DN Designation of thread Outside diameter max. min. 6 8 10 15 20

34、25 32 40 50 65 80 100 125 150 1/8 1/4 3/8 1/2 3/4 1 11/4 11/2 2 21/2 3 4 5 6 10,6 14 17,5 21,8 27,3 34,2 42,9 48,8 60,8 76,6 89,5 115 140,8 166,5 9,8 13,2 16,7 21 26,5 33,3 42 47,9 59,7 75,3 88 113,1 138,5 163,9BS6362:1990 BSI 10-1999 3 8.2 On thickness +not limited 12,5% (15% on isolated areas, on

35、a length not exceeding twice the specified outside diameter, provided that this reduction in thickness only affects the external surface) 8.3 On mass per unit length 10% for each tube 7,5% per lot of10t minimum 9 Testing 9.1 An analysis of each melt of steel shall be made by the steel manufacturer t

36、o determine the percentages of the elements specified in ISO2604-2 and ISO2604-5. 9.2 The tubes shall be submitted to visual inspection. 9.3 One tensile test shall be made on a test piece for lots of not more than100tubes. Tensile tests shall be made on test pieces from two tubes for lots of more th

37、an100tubes. The test pieces shall be cut out longitudinally from the tube, outside the welded area. The mechanical properties shall conform to the requirements given in ISO2604-2 and ISO2604-5. NOTEA lot is a number of tubes of the same diameter, the same thickness and the same steel grade. 9.4 Each

38、 tube shall be tested for leak tightness at the manufacturers plant. 9.4.1 Each tube shall be subjected to a hydraulic test at a pressure of50bar 3) . 9.4.2 This hydraulic test may, at the option of the manufacturer, be replaced by a non-destructive test carried out in accordance with ISO9302. 9.5 T

39、ubes which do not satisfy the tests shall bedeemed not to comply with this InternationalStandard. 10 Designation A tube in accordance with this International Standard shall be designated by a) “Tube”; b) reference to this International Standard; c) its grade of steel; d) its nominal size; e) its typ

40、e of end (plain or threaded socketed). EXAMPLE A tube of grade TS46, of nominal size DN20, and having a threaded end fitted with a screwed socket is designated as follows: Tube ISO7598TS46 DN20threaded socketed 11 Certificate 11.1 When specified by the purchaser on the order, the manufacturer shall

41、supply a certificate stating that the tubes comply with this International Standard. 11.2 This certificate shall comply with the requirements of ISO404:1981,5.2.1. 3) 1bar=10 5 PaBS6362:1990 4 BSI 10-1999 Annex A (informative) Bibliography ISO65:1981, Carbon steel tubes suitable for screwing in acco

42、rdance with ISO7-1. ISO1127:1980, Stainless steel tubes Dimensions, tolerances and conventional masses per unit length. ISO4200:1985, Plain end steel tubes, welded and seamless General tables of dimensions and masses per unit length. ISO6708:1980, Pipe components Definition of nominal size. BS6362:1

43、990 BSI 10-1999 Publications referred to See national foreword.BS6362:1990 ISO7598:1988 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the i

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