BS-MA-21-1973.pdf
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1、BRITISH STANDARD MARINE SERIES CONFIRMED JULY 1999 BS MA 21:1973 Specification for Deck-end roller fairleads UDC 629.12.014.24 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:15:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 21:1973 This British Standard
2、, having been approved by the Shipbuilding and Marine Industry Standards Committee, was published under the authority of the Executive Board on 31 July 1973 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference SME/2 Draft for comment 71/34604 ISBN 0 580 0
3、7379 3 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 970, Wrought steels. BS 1
4、387, Steel tubes and tubulars. BS 1400, Copper alloy ingots and copper and copper alloy castings. BS 1486, Lubricating nipples Part 2: Heavy duty lubricating nipples. BS 4190, ISO metric black hexagon bolts, screws and nuts. BS 4219, Slotted grub screws metric series. BS 4500, ISO limits and fits. T
5、he purpose of this standard is to provide details of a deck-end roller fairlead for shipboard use. The deck-end roller fairlead is designed primarily to be used for guiding the transfer of ropes of up to 80 mm diameter, whilst not under load, over changes in deck levels so as to prevent drag and abr
6、asion effects. 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 docu
7、ment comprises a front cover, an inside front cover, pages i and ii, pages 1 to 5 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. Amendments issued since publicati
8、on Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:15:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 21:1973 BSI 02-2000i Contents Page ForewordInside front cover 1Scope1 2Type and dimensions1 3Materials1 4Quality of manufacture and
9、finish1 Figure 1 Assembly of deck-end roller fairlead2 Figure 2 Assembly and details of frame: deck-end roller fairleads3 Figure 3 Details of deck-end roller fairleads4 Figure 4 Details of rollers for deck-end roller fairleads5 Table 1 Material specifications1 Licensed Copy: London South Bank Univer
10、sity, London South Bank University, Sat Dec 09 02:15:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:15:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 21:1973 BSI 02-20001 NOTEUsers of this British S
11、tandard, Marine Series, should note that while observing the requirements 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 provides a specifi
12、cation for a deck-end roller fairlead of fabricated steel support structure incorporating two vertical and one horizontal steel tube rollers. 1.2 The standard specifies type, dimensions, assembly, materials and inspection requirements. 2 Type and dimensions 2.1 The type of deck-end roller fairlead c
13、onstructed in accordance with this British Standard shall be as set out in Figure 1, Figure 2, Figure 3 and Figure 4 which cover assembly, details of components and dimensions. 2.2 All welds shall be of continuous fillet type of 4 mm throat thickness. 3 Materials The materials used shall be in accor
14、dance with Table 1. Other materials may be used provided they are at least as suitable in all respects for the intended duty and are equally acceptable to the purchaser. 4 Quality of manufacture and finish On completion the manufacturer shall ensure that 1) an initial charge of grease is applied at
15、the lubrication points, 2) each roller rotates freely, 3) the fairlead is free from corrosion and the rollers clear of any surface defect likely to damage the ropes, 4) a coat of priming paint is applied to all external steel surfaces. 5) the edges of plates likely, when in use, to come into contact
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