1、BRITISH STANDARD BS 7416:1991 Specification for Precision finished seamless cold-drawn low carbon steel tubes for use in hydraulic fluid power systemsBS7416:1991 This British Standard, having been prepared under the directionof the Machinery andComponents Standards PolicyCommittee, was publishedunde
2、r the authority ofthe Standards Board and comesinto effect on 30April1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference MCE/18 Draft for comment 90/74770 DC ISBN 0 580 19385 3 Committees responsible for this British Standard The preparation of this
3、 British Standard was entrusted by the Machinery and Components Standards Policy Committee (MCE/-) to Technical Committee MCE/18, upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute Association of British Mining Equipment Companies Bath University L
4、ibrary British Compressed Air Society British Fluid Power Association British Hydromechanics Research Association British Steel Industry Department of Trade and Industry (National Engineering Laboratory) Institution of Mechanical Engineers Ministry of Defence The following bodies were also represent
5、ed in the drafting of the standard, through subcommittees and panels: British Industrial Truck Association British Rubber Manufacturers Association Engineering Equipment and Materials Users Association Amendments issued since publication Amd. No. Date CommentsBS7416:1991 BSI 11-1999 i Contents Page
6、Committees responsible Inside front cover Foreword ii 1 Scope 1 2 General 1 3 Dimensions and tolerances 1 4 Surface finish 1 5 Leak tightness 1 6 Marking 1 Table 1 Tube dimensions and tolerances 2 Publications referred to Inside back coverBS7416:1991 ii BSI 11-1999 Foreword This British Standard has
7、 been prepared under the direction of the Machinery and Components Standards Policy Committee to provide a range of precision finished tubes which are suitable for use in hydraulic fluid power systems. BS7416 makes direct reference to BS3602-1 (for the manufacture, chemical analysis and mechanical p
8、roperties of the steel, inspection and testing of the tube in addition to supply conditions) and defines specific variations to that standard, e.g.dimensions and tolerances, surface texture and pressure test. The dimensions, tolerances and surface texture are compatible with German Standard DIN2391-
9、1 and DIN2391-2. 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 This do
10、cument comprises a front cover, an inside front cover, pagesi andii, pages1 to4, 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.BS7416:1991 BS
11、I 11-1999 1 1 Scope This British Standard specifies requirements for a range of precision finished, plain end, seamless, cold-drawn, low carbon steel tubes suitable for use in hydraulic fluid power systems. NOTEThe titles of the publications referred to in this standard are listed on the inside back
12、 cover. 2 General Unless otherwise stated in this standard, the tubing shall be cold finished seamless tube (CFS) grade360 or430, category2, complying with BS3602-1 with the additional requirements and variations specified in clauses3, 4 and5. 3 Dimensions and tolerances The dimensions and tolerance
13、s of the tube shall comply with those given inTable 1. NOTETubes for use with compression couplings should be ordered according to outside diameter and thickness dimensions. 4 Surface finish When measured in accordance with BS1134-1, the finished tube shall have an external surface texture as follow
14、s: a) 2.5m R aon tubesk 6mm wall thickness; b) 4.0m R aon tubes6mm wall thickness; measured in the longitudinal direction. 5 Leak tightness Each tube shall be tested by and shall comply with one of the following: a) hydraulic leak tightness test at a pressure of150% of the design pressure given in T
15、able 1 in accordance with12.4 of BS3602-1:1987; or b) eddy current test in accordance with Appendix E of BS3602-1:1987. 6 Marking All tubes shall be marked in accordance with clause17 of BS3602-1:1987, except for itemb) of17.2, which shall read as follows: the designation 1) , i.e.BS7416:1991: CFS36
16、0 or BS7416:1991: CFS430. 1) Marking BS7416:1991 on or in relation to a product represents a manufacturers declaration of conformity, i.e.a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the responsibil
17、ity of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS7416:1991 2 BSI 11-1999 Table 1 Tube dimensions and tolerances Tube outside diameter Nominal wall thickness Tube inside diameter Design pressure No
18、minal mass per unit length (reference) mm mm mm bar kg/m 4 0.1 0.50 0.75 1.00 3.0 0.3 2.5 0.3 2.0 0.3 313 409 522 0.043 0.063 0.074 5 0.1 0.80 1.00 3.4 0.3 3.0 0.3 376 432 0.083 0.099 6 0.1 0.75 1.00 1.50 2.00 2.25 4.5 0.25 4.0 0.25 3.0 0.30 2.0 0.40 1.5 0.45 333 389 549 692 757 0.103 0.123 0.166 0.
19、197 0.208 8 0.1 1.0 1.5 2.0 2.5 6.0 0.20 5.0 0.30 4.0 0.35 3.0 0.40 333 431 549 658 0.173 0.240 0.296 0.339 10 0.1 1.0 1.5 2.0 2.5 3.0 8.0 0.20 7.0 0.25 6.0 0.30 5.0 0.35 4.0 0.45 282 373 478 576 666 0.222 0.314 0.395 0.462 0.518 12 0.08 1.0 1.5 2.0 2.5 3.0 3.5 10.0 0.15 9.0 0.20 8.0 0.25 7.0 0.30 6
20、.0 0.40 5.0 0.45 235 353 409 495 576 651 0.271 0.388 0.493 0.586 0.666 0.734 14 0.08 1.0 1.5 2.0 2.5 3.0 3.5 4.0 12.0 0.08 11.0 0.15 10.0 0.20 9.0 0.25 8.0 0.30 7.0 0.35 6.0 0.40 201 302 403 434 507 576 641 0.321 0.462 0.592 0.709 0.814 0.906 0.986 15 0.08 1.0 1.5 2.0 2.5 3.0 13.0 0.08 12.0 0.15 11.
21、0 0.20 10.0 0.25 9.0 0.30 188 282 376 409 478 0.345 0.499 0.641 0.771 0.888BS7416:1991 BSI 11-1999 3Table 1 Tube dimensions and tolerances Tube outside diameter Nominal wall thickness Tube inside diameter Design pressure Nominal mass per unit length (reference) mm mm mm bar kg/m 16 0.08 1.0 1.5 2.0
22、2.5 3.0 14.0 0.08 13.0 0.08 12.0 0.15 11.0 0.20 10.0 0.30 176 264 353 386 452 0.370 0.536 0.691 0.832 0.962 18 0.08 1.0 1.5 2.0 2.5 3.0 16.0 0.08 15.0 0.08 14.0 0.08 13.0 0.20 12.0 0.20 157 236 313 392 409 0.419 0.610 0.789 0.956 1.110 20 0.08 1.5 2.0 2.5 3.0 3.5 4.0 17.0 0.08 16.0 0.08 15.0 0.20 14
23、.0 0.20 13.0 0.30 12.0 0.35 212 282 353 373 426 478 0.684 0.888 1.079 1.258 1.424 1.578 22 0.08 1.0 1.5 2.0 2.5 3.0 20.0 0.08 19.0 0.08 18.0 0.08 17.0 0.15 16.0 0.15 128 192 256 320 385 0.518 0.758 0.986 1.202 1.406 25 0.08 2.0 2.5 3.0 4.0 4.5 5.0 21.0 0.08 20.0 0.08 19.0 0.15 17.0 0.20 16.0 0.20 15
24、.0 0.30 226 282 338 394 437 478 1.138 1.387 1.626 2.072 2.275 2.466 28 0.08 1.5 2.0 2.5 3.0 4.0 5.0 25.0 0.08 24.0 0.08 23.0 0.08 22.0 0.15 20.0 0.15 18.0 0.20 151 201 252 302 403 437 0.980 1.282 1.572 1.850 2.368 2.836 30 0.08 2.0 2.5 3.0 4.0 5.0 26.0 0.08 25.0 0.08 24.0 0.15 22.0 0.15 20.0 0.15 18
25、8 235 282 376 409 1.381 1.695 1.998 2.565 3.083BS7416:1991 4 BSI 11-1999Table 1 Tube dimensions and tolerances Tube outside diameter Nominal wall thickness Tube inside diameter Design pressure Nominal mass per unit length (reference) mm mm mm bar kg/m 35 0.15 2.0 2.5 3.0 4.0 5.0 6.0 31.0 0.15 30.0 0
26、.15 29.0 0.15 27.0 0.15 25.0 0.15 23.0 0.20 161 201 242 322 403 419 1.628 2.004 2.367 3.058 3.699 4.291 38 0.15 2.5 3.0 4.0 5.0 6.0 7.0 33.0 0.15 32.0 0.15 30.0 0.15 28.0 0.15 26.0 0.15 24.0 0.20 186 223 297 371 390 446 2.189 2.589 3.354 4.069 4.735 5.352 42 0.20 2.0 3.0 4.0 38.0 0.20 36.0 0.20 34.0
27、 0.20 134 201 269 1.973 2.885 3.749 50 0.20 6.0 9.0 38.0 0.20 32.0 0.20 338 437 6.511 9.100 65 0.30 8.0 49.0 0.30 347 11.246 80 0.35 10.0 60.0 0.35 353 17.263BS7416:1991 BSI 11-1999 Publications referred to BS1134, Assessment of surface texture. BS1134-1, Methods and instrumentation. BS3602, Specifi
28、cation for steel pipes and tubes for pressure purposes: carbon and carbon manganese steel with specified elevated temperature properties. BS3602-1, Specification for seamless and electric resistance welded including induction welded tubes. DIN2391, Seamless precision steel tubes 2) . DIN2391-1, Dime
29、nsions. DIN2391-2, Technical delivery conditions. 2) Referred to in the foreword only.BS 7416:1991 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 a
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