《BS-MA-59-1974.pdf》由会员分享，可在线阅读，更多相关《BS-MA-59-1974.pdf（12页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD MARINE SERIES CONFIRMED JULY 1999 BS MA 59:1974 Specification for Sea tubes UDC 629.12.06:621.643.23.057:669.14 462 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 This British St
2、andard, having been approved by the Shipbuilding and Marine Industry Standards Committee, was published under the authority of the Executive Board on 3 July 1974 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference SME/3 Draft for comment 73/31743 DC ISBN
3、 0 580 08475 2 Foreword This British Standard has been prepared under the authority of the Shipbuilding and Marine Industry Standards Committee and is based on a proposal of the British Ship Research Association. This standard makes reference to the following British Standards: BS 1560, Steel pipe f
4、langes (nominal sizes “ in to 24 in) and flanged fittings for the petroleum industry Part 2: Metric dimensions. BS 3601, Steel pipes and tubes for pressure purposes. Carbon steel: ordinary duties. BS 3643, ISO metric screw threads Part 2: Limits and tolerances for coarse pitch series threads. BS 419
5、0, ISO metric black hexagon bolts, screws and nuts. BS 4360, Weldable structural steels. BS 4439, Screwed studs for general purposes. BS 4504, Flanges and bolting for pipes, valves and fittings Metric series. A British Standard does not purport to include all the necessary provisions of a contract.
6、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 This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 7 and a back cover. This s
7、tandard 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. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec
8、 09 02:20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 BSI 02-2000i Contents Page ForewordInside front cover 1Scope1 2Nominal sizes1 3Materials1 4Method and quality of manufacture1 5Tests and inspection2 Appendix A Installation of sea tubes3 Figure 1 Sea tubes, general purpose: nomina
9、l sizes 25 to 1504 Figure 2 Sea tubes, general purpose: nominal sizes 200 to 5005 Figure 3 Sea tubes, blow-down: nominal sizes 15 to 506 Figure 4 Typical sea tube installation7 Table 1 Materials1 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00
10、 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 BSI 02-20001 NOTEUsers of this British Standard: Marine Series should note that while observing the requi
11、rements of the standard they should at the same time ensure compliance with such statutory requirements, rules and regulations as may be applicable to the individual ship concerned. 1 Scope 1.1 This British Standard specifies a range of sea tubes for shipside outlets. The standard specifies material
12、s and dimensions, methods and quality of manufacture, and gives details of the inspection and tests to be performed on the finished components. 1.2 Appendix A gives details of the application and shipboard installation of sea tubes and includes guidance information to ensure that the components func
13、tion in the most effective manner. 2 Nominal sizes Sea tubes shall be designated by their nominal size which shall correspond to the nominal size of the valves with which they are to mate. General purpose sea tubes 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500 mm. Blow-dow
14、n sea tubes 15, 20, 25, 32, 40, 50 mm. 3 Materials 3.1 The materials used for manufacture shall be in accordance with the requirements given in Table 1. 3.2 Other materials may be used provided they are at least as suitable for the intended duty and are equally acceptable to the regulatory bodies. 4
15、 Method and quality of manufacture 4.1 The sea tubes shall be fabricated by welding from two components, the tube and the flange, see Figure 1 and Figure 2 for details of general purpose sea tubes and Figure 3 for details of blow-down sea tubes. 4.2 The tube shall be produced in accordance with the
16、following methods. 1) Cut from thick wall tube. See Figure 1. 2) Formed from plate and longitudinally welded. See Figure 2. 3) Bored-out solid bar. See Figure 3. 4.3 The mating dimensions of flanges for general purpose tubes shall comply with BS 4504, NP10 rating and for blow-down tubes to BS 4504 o
17、r BS 1560-2, the rating for the latter application depending on plant operating conditions. In all cases the flanges shall have flat jointing faces. Table 1 Materials ItemComponentMaterialBS specification BarPlateTube General purpose sea tubesTube Carbon steel (see note) 4360 Grade 43A 3601 HFS All
18、grades Flange4360 Grade 43A Blow-down sea tubes Tube4360 Grade 43A Flange 4360 Grade 43A Bolting for general purpose sea tubes and blow-down sea tubes Bolts4190 Grade 4.6 Nuts4190 Grade 4 Studs4439 Grade 4.8 NOTEShip quality steel plate may be used when general purpose sea tubes are to be made from
19、rolled and welded plate. If the sea tube is to be welded through high tensile ships plating, special attention should be given to the material selection to ensure compatibility for welding. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00 2006,
20、 Uncontrolled Copy, (c) BSI BS MA 59:1974 2 BSI 02-2000 4.4 The joint face of flanges shall be machined after welding and shall be at right angles to the tube and the outside diameter concentric with the bore. The final thickness of the flanges shall be in accordance with details given in Figure 1,
21、Figure 2 and Figure 3. 4.5 When bolts are specified, the backs of flanges shall be spot faced or machined in cases where the parallelism of the back of the flange to the joint face exceeds 1. 4.6 The metal end of studs, where used, shall have a depth of insertion equal to the nominal diameter of the
22、 thread. The thread of the tapped holes shall be to the standard limits of the tolerance 4H (close fit) as specified in BS 3643-2. 5 Tests and inspection Sea tubes of greater than 150 mm nominal size shall have all welds crack detected by the dye penetrant method. Sea tubes of nominal size of 150 mm
23、 and below to have the welds visually inspected for faults. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 BSI 02-20003 Appendix A Installation of sea tubes Sea tubes are to be installed in such
24、a position that their discharge does not interfere with the operation of lifeboats and accommodation ladders. It is recommended that general purpose sea tubes are located above the light load line and blow-down sea tubes below the light load line. Sea tubes, where their length exceeds 2D, are to be
25、securely bracketed to the ships structure (see Figure 4). Care is to be taken to ensure that the ends of brackets do not terminate on areas of unstiffened plate. For sea tubes of 200 mm and greater nominal size, the ends of brackets shall terminate on the main frame. Sea tubes are to be welded throu
26、gh the ships shell as shown in Figure 4. When sea tubes are used as stub fittings on sea water inlet boxes, the overall length of the tube should not exceed the outside diameter D of the tube. Sea tubes are to be protected internally by the application of an approved anti-corrosion coating after fin
27、al installation in the ship. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 4 BSI 02-2000 NOTE 1Flange diameter and drilling to BS 4504, NP10. NOTE 2Flanges flat faced and to be machined after we
28、lding but final thickness must not be less than T. NOTE 3Length L may be reduced if tube is fitted normal to shell plating (see Figure 4). NOTE 4In no case shall the tube thickness be less than the thickness of the shell plate. Nom. sizedDLT(min.) 25 32 40 50 65 80 100 125 150 25 32 40 50 65 80 100
29、125 150 88.9 88.9 88.9 88.9 114.3 114.3 193.7 193.7 193.7 350 350 350 350 350 350 350 350 350 20 24 24 24 24 24 24 24 28 All dimensions in mm Figure 1 Sea tubes, general purpose: nominal sizes 25 to 150 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GM
30、T+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 BSI 02-20005 NOTE 1Flange diameter and drilling to BS 4504, NP10. NOTE 2Flanges flat faced and to be machined after welding but final thickness must not be less than T. NOTE 3Length L may be reduced if tube is fitted normal to shell plating (see
31、 Figure 4). NOTE 4In no case shall the tube thickness be less than the thickness of the shell plate. Nom. sizedDLT (min.) 200 250 300 350 400 450 500 200 250 300 350 400 450 500 240 290 340 390 440 490 540 350 500 500 500 600 650 700 24 26 26 28 32 36 38 All dimensions in mm Figure 2 Sea tubes, gene
32、ral purpose: nominal sizes 200 to 500 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 6 BSI 02-2000 NOTE 1Flange diameter and drilling to BS 4504 or BS 1560-2, rating to suit plant operating condi
33、tions. NOTE 2Flanges flat faced and to be machined after welding but final thickness must not be less than T1. NOTE 3Length L may be reduced if tube is fitted normal to shell plating (see Figure 4). NOTE 4In no case shall the tube thickness be less than the thickness of the shell plate. NOTE 5T1= Di
34、ameter of stud plus 8 mm T2= thickness of hull but in no case less than 12 mm Nom. sizedDCL 1515 65702502020 2525 3232 90953504040 5050 All dimensions in mm Figure 3 Sea tubes, blow-down: nominal sizes 15 to 50 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:
35、20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 BSI 02-20007 Figure 4 Typical sea tube installation Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 59:1974 BSI 389 Chiswick High Road London
36、 W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revi
37、sion. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform t
38、he Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standar
39、ds. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been pub
40、lished as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available
41、 which give details on all its products and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and othe
42、r benefits contact Membership Administration. Tel: 020 8996 7002. Fax: 020 8996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and P
43、atents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necess
44、ary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI