1、BRITISH STANDARD BS 5276-1: 1984 Pressure vessel details (dimensions) Part 1: Specification for davits for branch covers of steel vessels UDC 621.772.4:621.643.412:621.646.1237BS5276-1:1984 This British Standard, having been prepared under the directionof the Pressure Vessel Standards Committee, was
2、 published under the authority ofthe Board of BSI and comes intoeffect on 31 August1984 BSI 07-1999 First published February1976 First revision August1984 The following BSI references relate to the work on this standard: Committee reference PVE/11 Draft for comment83/74303 DC ISBN 0 580 13929 8 Comm
3、ittees responsible for this British Standard The preparation of this British Standard was entrusted by the Pressure Vessel Standards Committee (PVE/-) to Technical Committee PVE/11 upon which the following bodies were represented: Associated Offices Technical Committee Association of Consulting Engi
4、neers British Chemical Engineering Contractors Association British Gas Corporation Chemical Industries Association Electricity Supply Industry in England and Wales Engineering Equipment and Materials Users Association Health and Safety Executive Institution of Gas Engineers Institution of Mechanical
5、 Engineers Process Plant Association Amendments issued since publication Amd. No. Date of issue CommentsBS5276-1:1984 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Materials 1 3 Dimensions 1 Figure 1 Davits for vertical and horizontal flanges 2 Table 1
6、 Material and dimensional standards 1 Table 2 Dimensions of davits for vertical and horizontal flanges 3 Publications referred to Inside back coverBS5276-1:1984 ii BSI 07-1999 Foreword This British Standard has been prepared under the direction of the Pressure Vessel Standards Committee to cover the
7、 dimensions of pressure vessel details. It is published in a number of Parts as follows: Part 1: Specification for davits for branch covers of steel vessels; Part 2: Specification for saddle supports for horizontal cylindrical pressure vessels; Part 3: Dimensional tolerances for ferrous pressure ves
8、sels; Part 4: Standardized pressure vessels. This revision of this Part of BS5276has been made in order to include amendments dictated by practical experience with the1976 edition. It supersedes BS5276-1:1976 which is withdrawn. In the application of this Part of this standard due regard has to be g
9、iven to the requirements of the appropriate standard to which the vessel is designed and fabricated. Consideration has also to be given to ensure the compatibility of the recommended materials with the conditions of temperature and environment to which the davits will be exposed. A British Standard
10、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 document comprises a front cover, an i
11、nside 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.BS5276-1:1984 BSI 07-1999 1 1 Scope This Part of t
12、his British Standard specifies dimensions and materials for davits for branch covers (blank flanges) fitted to steel pressure vessels of all types. Provision is made for flanges that comply with BS1560and BS4504, in both vertical and horizontal positions, in sizes which are expected to be commonly u
13、sed for access openings. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Materials The grades of material used in the construction of davit details shall be in accordance with Table 1. NOTESuch considerations as temperature, environment and comp
14、atibility with the vessel materials may dictate the use of higher grade materials which should be agreed between the purchaser and the manufacturer. 3 Dimensions The dimensions of davits shall be in accordance with Table 1 and Table 2 according to the pressure rating, size and position of flange (ve
15、rtical or horizontal). Table 1 Material and dimensional standards Component Material standard Dimensional standard Supporting bracket and sling rod lugs Davit arm and sling rod Davit arm thrust washer Nuts for sling rod Sling rod washer Bolt BS4360; grade43A BS970-1; category070M20 BS2870; designati
16、on CZ108, condition H BS4190; strength grade4 BS1449-1; grade CS4 BS4190; strength grade4.6 Table 2 of this standard and/or Figure 1 BS4190 BS4320, form A Table 2 of this standard NOTESpecific applications should be checked against the design standard for restrictions on the proximity of welds. BS52
17、76-1:1984 2 BSI 07-1999Figure 1 Davits for vertical and horizontal flanges (see Table 2 for lettered dimensions)BS5276-1:1984 BSI 07-1999 3 Table 2 Dimensions of davits for vertical and horizontal flanges (see Figure 1) Davits for vertical flanges Nom. size E H J K L M N P Nom. size E H J K L M N P
18、Flange to BS1560-2, class150 Flange to BS4504-1, nominal pressure16 bar a in 20 mm 60 mm 425 mm 35 mm 61 mm 415 mm 37 mm 12 mm 50 mm 500 mm 60 mm 425 mm 35 mm 53 mm 415 mm 37 mm 12 mm 50 24 70 480 45 60 472 41 12 50 600 70 495 45 59 484 44 12 50 Flange to BS1560-2, class300 Flange to BS4504-1, nomin
19、al pressure40 bar 20 70 465 45 61 454 41 12 50 500 70 465 45 70 454 43 12 50 24 80 545 55 71 535 49 12 55 Flange to BS1560-2, class600 20 80 490 55 74 490 51 12 55 24 100 580 65 80 560 62 15 65 Davits for horizontal flanges Nom. size E G H J K L N P Nom. size E G H J K L N P Flange to BS1560-2, clas
20、s150 Flange to BS4504-1, nominal pressure16 bar in 20 mm 70 mm 180 mm 215 mm 45 mm 69 mm 418 mm 12 mm 50 mm 500 mm 70 mm 165 mm 215 mm 45 mm 61 mm 418 mm 12 mm 50 24 70 185 215 45 74 480 12 50 600 70 175 215 45 60 480 12 50 Flange to BS1560-2, class300 Flange to BS4504-1, nominal pressure40 bar 20 7
21、0 140 235 45 60 447 12 50 500 70 140 235 45 70 447 12 50 24 80 220 245 55 68 525 12 55 a 1 bar =10 s N/m 2=100kPa.4 blankBS5276-1:1984 BSI 07-1999 Publications referred to BS 970, Specification for wrought steels for mechanical and allied engineering purposes. BS 970-1, General inspection and testin
22、g procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels. BS 1449, Steel plate, sheet and strip. BS 1449-1, Specification for carbon and carbon manganese plate, sheet and strip. BS 1560, Steel pipe flanges and flanged fittings (nominal sizes “ in to24in) for th
23、e petroleum industry. BS 1560-2, Metric dimensions. BS 2870, Specification for rolled copper and copper alloys: sheet, strip and foil. BS 3974, Pipe supports. BS 3974-1, Pipe hangers, slider and roller type supports. BS 4190, ISO metric black hexagon bolts, screws and nuts. BS 4320, Metal washers fo
24、r general engineering purposes. BS 4360, Specification for weldable structural steels. BS 4504, Flanges and bolting for pipes, valves and fittings. Metric series. BS 4504-1, Ferrous. BS5276-1: 1984 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent nationa
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