1、BRITISH STANDARD MARINE SERIES BS MA 81:1980 Specification for Ships derrick fittings UDC629.12.011:621.873.134BSMA81:1980 This BritishStandard, having been prepared under the directionof the Shipbuilding andMarine Standards Committee, was published underthe authority of the Executive Board and come
2、s into effect on 28November1980 BSI02-2000 The following BSI references relate to the work on this standard: Committee reference SME/13 Draft for comment77/70698 DC ISBN 0 580 11567 4 Amendments issued since publication Amd. No. Date of issue CommentsBSMA81:1980 BSI 02-2000 i Contents Page Foreword
3、ii 1 Scope 1 2 References 1 3 Terminology and descriptions 1 4 Axial and permissible loads 2 5 Nominal sizes 2 6 Materials 2 7 Construction and quality of manufacture 2 8 Testing, inspection and certification 3 Figure 1 Typical derrick rig arrangement showing locations of fittings 4 Figure 2 Goosene
4、ck bearing assembly 5 Figure 3 Topping swivel assembly 6 Figure 4 Head fittings 7 Figure 5 Heel fittings 9 Figure 6 Heel cross-pins 10 Figure 7 Gooseneck pins 11 Figure 8 Gooseneck bearing brackets 12 Figure 9 Heel blockholders 13 Figure 10 Retaining rings and retaining pins for goosenecks 14 Figure
5、 11 Topping swivels and locating pins 15 Figure 12 Topping swivel bearing brackets 16 Table 1 Recommended materials 2BSMA81:1980 ii BSI 02-2000 Foreword This BritishStandard has been prepared under the direction of the Shipbuilding and Marine Standards Committee and is based on a proposal of the Bri
6、tish Ship Research Association. The proliferation of designs of ships derrick fittings in the UK to date has been the direct result of individual design and manufacturing practices operated by UK shipbuilders within the general guide-lines specified by the Regulatory Bodies. Among overseas shipbuild
7、ing countries, national standards were available and consequently the variation in basic design was not so great as in the UK, although in some instances dimensional variations still occur. In order to resolve this situation, the International Organization for Standardization (ISO) has scheduled a p
8、rogramme of work by Technical Committee ISO/TC8/SC2, Ships cargo handling appliances. Draft proposals for the standardization of some derrick fittings are at an advanced stage within ISO and these are based on a continental design. Since there are basic design differences between the continental met
9、hods and the UK methods, it has been necessary in the interest of International Standardization to introduce certain features of the continental designs into this standard, except for those instances where for economic and manufacturing reasons it was considered more beneficial to adhere to UK pract
10、ices. This standard should be used in association with the companion standard BS MA83 1) . 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
11、of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to16 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the ame
12、ndment table on the inside front cover. 1) In course of preparation.BSMA81:1980 BSI 02-2000 1 NOTEUsers of this BritishStandard Marine Series should note that while observing the requirements of this standard, they should at the same time ensure compliance with such statutory requirements, rules and
13、 regulations as may be applicable to the individual ship concerned. 1 Scope This BritishStandard specifies dimensions and recommends materials for ships derrick fittings suitable for axial or permissible loads ranging from1.6t to40t inclusive. Excluded from this standard are: a) the specification fo
14、r tubular derrick booms, for which reference should be made to BS MA83 2) ; b) the specification for securing bolts for the attachment of the cargo blocks to the heel blockholder or topping swivel, where special types of bolts with spring adjusters are sometimes used. 2 References This standard make
15、s reference to the following standards publications. BS499, Welding terms and symbols Part2:Specification for symbols for welding. BS970, Wrought steels in the form of blooms, billets Part1: Carbon and carbon manganese steels including free cuttings steels. BS1486, Lubricating nipples Part1: Lubrica
16、ting nipples and adaptors for use on machinery and vehicles. BS1574, Split cotter pinsmetric and inch series. BS4320, Metal washers for general engineering purposes. BS4360, Specification for weldable structural steels. BS5135, Metal-arc welding of carbon and carbon manganese steels. BS MA10, Oval e
17、yeplates. BS MA48, Code of practice for design and operation of ships derrick rigs. BS MA83, Specification for tubular derrick booms 2) . 3 Terminology and descriptions For the purposes of this standard the following terminology applies. NOTE 1Reference should be made to Figure 1, which gives an ill
18、ustrated location of the fittings described below for a typical derrick rig arrangement. NOTE 2Figure 2 and Figure 3 respectively give detailed arrangements of the gooseneck bearing assembly and the topping swivel assembly shown in outline in Figure 1. 3.1 head fittings (seeFigure 4) a double-ended
19、eyeplate located near the free end of the boom and penetrating through the boom on the vertical centreline. The derrick head cargo block is attached to the lower part of the head fitting and the derrick head span block is attached to the upper part. For guy pendant connections, a head fitting is fit
20、ted through the boom on the horizontal centreline NOTEThe types of head fittings used on derricks are often referred to as sword fittings. 3.2 heel fitting (seeFigure 5) a forked fitting welded into the lower end of the boom for connecting to the gooseneck pin. The fork permits the boom to be raised
21、 or lowered in a vertical direction (topped) 3.3 heel cross-pin (seeFigure 6) the pin for securing the derrick boom via the heel fitting to the gooseneck pin 3.4 gooseneck pin (seeFigure 7) a pin having a spade end and eye located at the top which connects with the forked heel fitting on the derrick
22、 boom. The centreline of the eye in the spade end is either in-line with the vertical centreline of the pin, i.e.straight type, or offset from the pin centreline away from the supporting structure towards the derrick boom, i.e.cranked type the gooseneck pin is free to revolve in its bearing bracket
23、and thus permits the boom to be slewed 3.5 gooseneck bearing bracket (seeFigure 8) a fabricated bracket welded to the ships mast, samson post, or superstructure, and having an upper and lower bearing into which the gooseneck pin fits 2) In course of preparation.BSMA81:1980 2 BSI 02-2000 3.6 heel blo
24、ckholder (seeFigure 9) a thick steel ring incorporating either a single or double lug with drilled eye(s). The blockholder fits into the interspace between the upper and lower bearings on the bearing bracket and is free to rotate on the gooseneck pin. The cargo runner derrick heel lead block is secu
25、red to the lug(s) by means of a through pin or bolt 3.7 retaining ring with pin for goosenecks (seeFigure 10) a steel ring fitting under the blockholder in the interspace between the upper and lower bearings on the bearing bracket. By means of a through pin, it is secured to the gooseneck pin and pr
26、events this from being lifted out of the bearings. It also serves as a distance piece, in that, together with the heel blockholder, it makes up the vertical distance between the upper and lower bearings 3.8 topping swivel and locating pin (seeFigure 11) a similar type of fitting to the heel blockhol
27、der(3.6) but located high up on the mast or samson post for the purpose of raising or lowering (i.e.topping) the derrick boom. The swivel has a spade end with a drilled eye for securing the mast head span block. The swivel is located in the bearing bracket by means of a vertical locating pin 3.9 top
28、ping swivel bearing bracket (seeFigure 12) a fabricated support bracket attached to the mast or samson post 4 Axial and permissible loads 4.1 The axial and permissible loads shall be determined, from the safe working load (SWL) of the rig (but seenote), in accordance with BS MA48. The load capacity
29、of the particular fitting selected, whether on the basis of axial thrust load or permissible load, shall not be less than the maximum load that will be exerted on the fitting, as determined by calculation. NOTEThe calculated load (axial or permissible) exerted on the individual fitting should not be
30、 regarded as the safe working load (SWL) of the complete rig, which will have to be determined according to the type of rig, purchase effects, effective boom length, suspension height, etc. Reference should be made to BSMA48 for guidance on the design of complete rigs and the evaluation of the resul
31、ting loads in the various component fittings. 4.2 The derrick fittings detailed in Figure 4, Figure 8, Figure 9, Figure 11 and Figure 12 are not designated by nominal size, but by the permissible load that shall not be exceeded on the eye of the fitting. 5 Nominal sizes The nominal size designations
32、 of the derrick fittings given in the tables of Figure 5, Figure 6 and Figure 7 are for reference purposes and shall be selected according to the axial thrust load in the derrick boom. 6 Materials Recommended materials are listed in Table 1. Materials shall be suitable in all respects for the intend
33、ed duty and shall be equally acceptable to the purchaser and Statutory Authority concerned. Table 1 Recommended materials 7 Construction and quality of manufacture 7.1 General. The fittings shall be constructed by fabricating, forging, profiling, and machining, as necessary, and shall comply with th
34、e form and dimensions specified for the appropriate fitting in Figure 2 to Figure 12. The fittings shall be free from any flaws that could precipitate failure when under loaded conditions. To avoid stress concentrations, corners shall be well rounded. 7.2 Welding. Where fittings are fabricated, the
35、welding shall be carried out in accordance with BS5135. The stress in any weld shall not exceed85N/mm 2 . Part Component BS Specification Derrick boom attachments Head fittings Heel fittings BS4360 grade43A a Gooseneck bearing assembly Steel plate BS4360 grade43A a Bearings Gooseneck pins Heel block
36、holders Retaining rings Heel cross-pins BS970 070M20 or BS4360 grade43A a Retaining pins BS970 070M20 Washers BS4320 Split cotter pins BS1574 Topping swivel assembly Steel plate BS4360 grade43A a Swivel BS970 070M20 or BS4360 grade43A a Locating pin BS970 070M20 Washers BS4320 Split cotter pins BS15
37、74 a Shipbuilding quality steel plate may be used provided that it is of equivalent mechanical and weldable properties. BSMA81:1980 BSI 02-2000 3 NOTEThe welding symbols shown in the figures of this standard are in accordance with BS499-2, and the associated dimensions are expressed in terms of weld
38、 throat thickness and not leg length. Weld sizes for the attachment of the gooseneck and topping brackets to the ships structure have been omitted from Figure 8 and Figure 12 as the weld size may vary, depending upon whether the brackets are mounted on to a curved or flat surface, and the actual are
39、a of metal-to-metal contact. In these cases, it shall be the responsibility of the shipbuilder to determine the weld size for the particular installation. 7.3 Flame cutting. Where fittings are profiled to shape by flame cutting, care shall be taken to ensure that an acceptable surface finish is obta
40、ined, or that surfaces are ground or machined as necessary. Wherever possible, the fibre direction of the plate shall be in the direction of the greatest stress. 7.4 Moving parts. All moving parts shall be adequately greased on assembly. NOTEReference should be made to Figure 2 and Figure 3 for illu
41、strations and notes for the gooseneck bearing assembly and topping swivel assembly respectively. 8 Testing, inspection and certification Lifting equipment shall comply with certain statutory requirements specified by the Docks Regulations,1934, and reference shall be made to these Regulations, an ex
42、tract from which is given in BS MA48.BSMA81:1980 4 BSI 02-2000 Figure 1 Typical derrick rig arrangement showing locations of fittingsBSMA81:1980 BSI 02-2000 5 Refer to Figure 7 for details of gooseneck pins Refer to Figure 8 for details of gooseneck bearing bracket Refer to Figure 9 and Figure 10 fo
43、r details of heel blockholders, retaining rings and pins Figure 2 Gooseneck bearing assemblyBSMA81:1980 6 BSI 02-2000 Refer to Figure 11 for details of swivel and locating pin. Refer to Figure 12 for details of topping swivel bearing bracket. Figure 3 Topping swivel assemblyBSMA81:1980 BSI 02-2000 7
44、 Maximum permissible load on eye Oval eye c d (dia.) e h r 1 r 2 t 1 t 2 a b t 2.0 mm 50 mm 27 mm 100 mm 25 mm 40 mm 88 mm 25 mm 38.5 mm 22 mm 25 2.5 55 29 105 27 40 93 28 39.5 25 25 3.2 66 33 126 30 45 103 30 46.5 28 30 4.0 77 36 147 33 50 118 33 53 30 35 5.0 87 41 167 39 55 123 38 60.5 35 40 6.3 9
45、1 45 171 42 60 132.5 43 62.5 40 40 8.0 101 51 201 48 70 148.5 48 75.5 45 50 10.0 117 56 217 52 75 163 55 78 50 50 12.5 128 61 248 56 80 177.5 60 90.5 55 60 16.0 145 67 265 65 85 193.5 65 93.5 60 60 20.0 157 73 297 74 95 211.5 70 106.5 65 70 25.0 170 80 331 78 100 240 75 120 70 80 32.0 194 88 374 86
46、110 279 85 134 80 90 40.0 220 98 420 96 120 309 95 149 90 100 NOTE 1Where reinforcing plates are fitted to the outside diameter of the boom adjacent to the head fitting, dimensions e and h shall be measured from the surface of the reinforcing plates. NOTE 2Dimensional details of head fittings may di
47、ffer at opposite ends of the fitting depending upon span load and cargo load. On type B head fittings, the thickness t 1may be equal to t 2but account shall be taken of the effect of this on the cargo block head fitting. SeeFigure 4(b). (a) Form and dimensions Figure 4 Head fittingsBSMA81:1980 8 BSI
48、 02-2000 (1) Typical arrangement of head fittings (2) Table of cargo load/span load combinations Cargo load (max.) Span load (max.) t 2.0 t 2.5 2.5 3.2 3.2 4.0 4.0 5.0 5.0 6.3 6.3 8.0 8.0 10.0 10.0 12.5 12.5 16.0 16.0 20.0 20.0 25.0 The preferred load combinations are in heavy outline. Alternative l
49、oad combinations to those given in the table may be used. In all cases the load combination shall be checked by calculation and selected accordingly. 25.0 32.0 32.0 40.0 (b) Typical arrangement of head fittings and table of cargo load/span load combinations Figure 4 Head fittings (concluded)BSMA81:1980 BSI 02-2000 9 Nominal size Boom maximum axial thrust load a b c d (dia.) e min. g l max. r 1.6 t 1.6 mm 32 mm 16 mm 28 mm 24 mm 10 mm 15 mm 80 mm 25 2 2.0 35 16 30 26 10 15 90 28 2.5 2.5 45 22 32 29 10 15
