《BS-MA-14-1972.pdf》由会员分享,可在线阅读,更多相关《BS-MA-14-1972.pdf(8页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD MARINE SERIES CONFIRMED JULY 1999 BS MA 14:1972 Recommendations for the co-ordination of dimensions in shipbuilding: Co-ordinating sizes for components and assemblies UDC 629.12.071:65.011.4:629.12.01 Licensed Copy: London South Bank University, London South Bank University, Sat Dec
2、 09 02:13:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 14:1972 This British Standard, having been approved by the Shipbuilding 2) the reduction in manufacture of non-standard units; 3) the avoidance of wastage in cutting components on site by achieving maximum flexibility in assembly; 4) the
3、interchangeability of components giving more choice and flexibility for designers. The changeover to the metric system in the United Kingdom provides a unique opportunity for the introduction of a rational system of dimensional co-ordination and with this intention a series of British Standards has
4、been planned, similar to those being published for the construction industry, which will give module sizes, controlling dimensions, recommendations for co-ordinating spaces, etc., and a glossary of terms for use in dimensional co-ordination. In order to achieve the co-ordination of dimensions it is
5、necessary first to reduce the number of possible sizes that are to be used, i.e. a selection of sizes must be made. The method which has been adopted here, as well as by the construction industry in BS 4011, “Recommendations for the co-ordination of dimensions in building. Basic sizes for building c
6、omponents and assemblies”, is to select one or more units of size or modules, and using the multiples of these to obtain preferred sizes for components and assemblies. The selection of the units of size is the subject of these British Standard Recommendations. From this selection, ranges of sizes wi
7、ll be established for particular components and published in subsequent Marine Series British Standards. This work will be carried out by the technical committees, who will give regard to the function of the components, the materials and methods of manufacture used and other components to which they
8、 will be related within the ship. The ultimate aim of these operations is the maximum use of standard components, but this is only likely to be achieved if manufacturers and designers select from the resultant British Standards for metric dimensionally co-ordinated components. The tolerances on the
9、size and form of the components and on their assembly in the ship also need to be determined. BS 3626, “Recommendations for a system of tolerances and fits for building” and BS 4643, “Glossary of terms relating to joints and jointing in building” set out a system for such control in the building con
10、struction industry, and a similar application is intended for shipbuilding. This standard makes reference to the following British Standards: BS 2900, Recommendations for the co-ordination of dimensions in building. Glossary of terms. BS 3626, Recommendations for a system of tolerances and fits for
11、building. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:13:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 14:1972 BSI 02-2000iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are r
12、esponsible 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 inside front cover, pages i to iv, page 1 and a back cover. This standard has been updated (see copyright
13、 date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:13:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Ban
14、k University, London South Bank University, Sat Dec 09 02:13:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 14:1972 BSI 02-20001 NOTEUsers of this British Standard, Marine Series, should note that while observing the requirements of the standard they should at the same time ensure compliance wi
15、th such statutory requirements, rules and regulations as may be applicable to the individual ship concerned. 1 Scope This British Standard makes recommendations for the derivation of the sizes for the co-ordinating dimensions of components and assemblies for use in fitting out ships, with particular
16、 reference to ships deckhouses and accommodation. 2 Definitions For the purpose of these recommendations, the definitions in BS MA 13 apply. These definitions are based on BS 2900, any alterations being necessitated by the different terminology in the shipbuilding industry. 3 Co-ordinating sizes 3.1
17、 The first selection of sizes for the co-ordinating dimensions of components and assemblies should be in multiples of the standard modules, as follows, in descending order of preference: 1) n 300 mm 2) n 100 mm 3) n 50 mm up to 300 mm (where n is any natural number including unity). 3.2 The sizes fo
18、r the co-ordinating dimensions should be chosen from the first selection after consideration of the relevant functional requirements. The preferred sizes should, as far as possible, apply to each type of component irrespective of the materials. Account should be taken of the need for different types
19、 of components or assemblies to occupy spaces of the same size. Where a number of components are used to build up an assembly, the overall size for the assembly should be a co-ordinating size. 3.3 The work sizes of components and assemblies should be determined, taking account of space for joints an
20、d allowance for tolerances in accordance with the recommendations of BS 3626. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:13:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 14:1972 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institu
21、tion BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards shou
22、ld make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committ
23、ee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all B
24、SI, international and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless o
25、therwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its produc
26、ts and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Adminis
27、tration. Tel: 020 8996 7002. Fax: 020 8996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be rep
28、roduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size
29、, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:13:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
链接地址:https://www.31doc.com/p-3748950.html