BS-7796-1995 ISO-6162-1994.pdf
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1、BRITISH STANDARD BS 7796:1995 ISO 6162:1994 Specification for Hydraulic fluid power Four-screw split-flange connections for use at pressures of 2,5 MPa to 40 Mpa (25 bar to 400 bar) Type 1 metric series and type 11 inch series Licensed Copy: London South Bank University, London South Bank University
2、, Fri Dec 08 11:29:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7796:1995 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 March 1995 BSI 09-1999 The following BSI
3、 references relate to the work on this standard: Committee reference MCE/18 Draft for comment 84/76642 DC ISBN 0 580 23858 X Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee MCE/18, Fluid power systems and components, upon
4、 which the following bodies were represented: Association of British Mining Equipment Companies British Compressed Air Society British Fluid Power Association British Hydromechanics Research Association British Steel Industry Department of Trade and Industry (National Engineering Laboratory) Ministr
5、y of Defence University of Bath The following bodies were also represented in the drafting of the standard through a subcommittee: British Industrial Truck Association Engineering Equipment and Materials Users Association Amendments issued since publication Amd. No.DateComments Licensed Copy: London
6、 South Bank University, London South Bank University, Fri Dec 08 11:29:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7796:1995 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Normative references1 3Definitions1 4Material1 5General spe
7、cifications2 6Dimensions2 7Tolerances2 8Finish2 9Identification statement2 Annex A (informative) Equivalent SAE O-rings11 Annex B (informative) Bibliography11 Figure 1 Assembled split-flange connection3 Figure 2 O-ring3 Figure 3 Flanged head4 Figure 4 Split-flange clamp halt5 Figure 5 Port dimension
8、s for flange connections Minimum and recommended flange pad widths8 Table 1 Dimensions of hydraulic flange connections 2,5 MPa to 35 MPa (25 bar to 350 bar) series6 Table 2 Dimensions of hydraulic flange connections 40 MPa (400 bar) series7 Table 3 Port dimensions for flanged connections Minimum and
9、 recommended flange pad widths 2,5 MPa to 35 MPa (25 bar to 350 bar) series9 Table 4 Port dimensions for flange connections Minimum and recommended flange pad widths 40 MPa (400 bar) series10 Table A.111 List of referencesInside back cover Licensed Copy: London South Bank University, London South Ba
10、nk University, Fri Dec 08 11:29:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7796:1995 ii BSI 09-1999 National foreword This British Standard was prepared by Technical Committee MCE/18. It is identical with ISO 6162:1994 Hydraulic fluid power Four-screw split-flange connections for use at pressu
11、res of 2,5 MPa to 40 MPa (25 bar to 400 bar) Type 1 metric series and type 11 inch series published by the International Organization for Standardization The Technical Committee has reviewed the provisions of ISO 273:1979, ISO 898-1:1988, ISO 3601-1:1988 and ISO 5598:1985 to which normative referenc
12、e is made in the text, and has decided that they are acceptable for use in conjunction with this standard. 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 St
13、andard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard ISO 48aBS 903 Physical testing of rubber Part A26:1969 Determination of hardness (Technically equivalent) ISO 261:1973BS 3643: ISO metric screw threads ISO 724:1993
14、Part 1:1981 Principles and basic data (Technically equivalent) ISO 263:1973BS 1580: Specification for Unified screw threads ISO 725:1978Part 1 1 Pa = 1 N/m2 2) To be published. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:29:35 GMT+00:00 2006, Uncontrolled
15、 Copy, (c) BSI BS 7796:1995 2 BSI 09-1999 c) 40 MPa (400 bar), all nominal flange sizes minimum yield stress: 331 N/mm2 minimum percentage elongation after fracture: 3 4.3 Use metric screws of property class 8.8 or 10.9 (ISO 898-1) or inch screws which have a minimum tensile strength of 827 N/mm2. 4
16、.4 Use metric or inch screws made from medium carbon steel, quenched and tempered. 5 General specifications 5.1 Select from Table 1 to Table 4 either type I (metric) or type II (inch) split-flange clamp halves and ports depending on whether metric or inch screw fasteners are required. 5.2 Ensure tha
17、t all type I clamp halves and ports are permanently embossed or stamped with the letter M to denote use of metric screws. 5.3 Use either socket head cap screws or hexagon head screws of property class 8.8 or 10.9, as specified in ISO 898-1. 5.4 Provide workmanship which conforms to the best commerci
18、al practice to produce high-quality connection components. 6 Dimensions The following specifications supplement the dimensional data contained in Table 1 and Table 2 with respect to all unspecified detail. 6.1 Select the nominal matching flange size clamp for the matching port size from Figure 2 to
19、Figure 4 and Table 1 or Table 2. Specify 2,5 MPa to 35 MPa (25 bar to 350 bar) series or 40 MPa (400 bar) series. 6.1.1 Refer to Figure 5 and Table 3 for matching port dimensions and spacing for 2,5 MPa to 35 MPa (25 bar to 350 bar) series. 6.1.2 Refer to Figure 5 and Table 4 for matching port dimen
20、sions and spacing for 40 MPa (400 bar) series. 6.2 Select the size and pressure series for flanged heads, shown in Figure 3 and Table 1 and Table 2, in accordance with the size and pressure series selected for the clamp halves and ports. NOTE 1The flange head selection is not affected by the differe
21、nce in screw fasteners. 6.3 Use O-ring seals (see Figure 2) that conform to the dimensions in ISO 3601-1, which are repeated in Table 1 and Table 2. They shall have a hardness of 90 5 in accordance with ISO 48 and shall conform to grade N in ISO 3601-3. For equivalent O-rings in accordance with SAE
22、J120, see Annex A. 6.4 Select metric or inch screws for use with these connections for the sizes and lengths indicated in Table 1 and Table 2, and depending upon whether type I or type II clamp halves were chosen, as specified in 5.1. Designate both thread size and length of screws. 6.5 Designate fo
23、ur-screw split-flange connection sizes by the nominal flange size which corresponds to the maximum diameter of the bore through the flanged head. NOTE 2Dimensions and tolerances given in the tables apply to the finished parts, plated or otherwise processed, as specified by the purchaser. 7 Tolerance
24、s All dimensions for flanged heads, split-flange clamp halves and ports, not otherwise limited, shall be used with a tolerance of 0,4 mm. 8 Finish 8.1 Unless otherwise specified by the purchaser, supply the flanged heads and split-flange clamp halves with one of the following finishes as specified:
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