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1、BRITISH STANDARD BS 5172:1975 ISO 1530:1973 Specification for Fishing nets: description and designation of knotted netting UDC 677.664.22.001.3:639.2.081.11 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:20:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5172:1975 This British Standard,
2、having been approved by the Ropes and Cordage Industry Standards Committee, was published under the authority of the Executive Board on 31 January 1975 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference RCT/8 ISBN 0 580 08670 4 Co-operating organization
3、s The Ropes and Cordage Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: British Ports Association British Railways Board British Tug Owners Ass
4、ociation Chamber of Shipping of the United Kingdom Cotton Twine Manufacturers Association Department of Employment Department of Industry Federation of Soft Fibre Associations* Hard Fibre Cordage Institute* Lloyds Register of Shipping London Master Stevedores Association Ministry of Agriculture, Fis
5、heries and Food* Ministry of Defence Synthetic Cordage Manufacturers Association The Government department and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the Committee entrusted with the preparation of this British St
6、andard: British Man-made Fibres Federation British Trawlers Federation Ltd. Department of Agriculture and Fisheries for Scotland Federation of British Trawler Owners Grimsby Net Manufacturers Association Herring Industry Board Scottish Fishermens Federation Scottish Inshore White Fish Producers Asso
7、ciation Ltd. Scottish Trawler Federation Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:20:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5172:1975 BSI 12-1999i Contents Page Co-operating organizationsInside front cover F
8、orewordii 1Scope and field of application1 2References1 3Principal characteristics of knotted netting1 4Description of netting yarns3 5Information to be exchanged3 Figure 1 Two-yarn system1 Figure 2 Single-yarn system2 Figure 3 Weavers knot Z-type2 Figure 4 Weavers knot S-type2 Figure 5 Double weave
9、rs knot2 Figure 6 Reef knot2 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:20:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5172:1975 ii BSI 12-1999 Foreword This British Standard has been prepared under the authority of the Ropes and Cordage Industry Standards Committee. It is identi
10、cal both in technical content and format with ISO 1530:1973 “Fishing nets Description and designation of knotted netting”. For the purposes of this British Standard the text of ISO 1530 given in this publication should be modified as follows. Terminology. The words “British Standard” should replace
11、“International Standard” wherever they appear. Cross-references. The references to other International Standards should be replaced by references to British Standards as follows: A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are
12、 responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Reference to International StandardAppropriate British Standard ISO 858:1973 “Fishing Nets Designation of netting yarns in the Tex System” BS 4406:1969 “Designati
13、on in the Tex System of netting yarns for fishing nets” ISO 1107:1974 “Fishing nets Netting Basic terms and definitions” BS 4440:1974 “Glossary of basic terms for fishing nets” Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cove
14、r. 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. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:20:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5172:1975 BSI 12-199
15、91 1 Scope and field of application The International Standard describes the principal characteristics of knotted netting for fishing nets, and specifies the items of information to be furnished when ordering the netting. It is intended to facilitate the exchange of information between purchasers an
16、d suppliers of knotted netting for fishing nets. NOTEIt should be understood that a complete designation of knotted netting and its component yarns will not always form part of a contract. There will be occasions when an order is placed on the basis of a sample or some other basis that does not give
17、 a complete indication of the properties of the netting or its component yarns. Nevertheless, it is desirable that the complete range of information should be dealt with in this International Standard so that a standard method is available for use on those occasions when it is needed. 2 References I
18、SO 858, “Fishing nets Designation of netting yarns in the Tex System”. ISO 1107, “Fishing nets Netting Basic terms and definitions”. 3 Principal characteristics of knotted netting 3.1 Types of manufacture. Knotted netting may be manufactured in the two-yarn system or in the single-yarn system as des
19、cribed below. 3.1.1 Two-yarn system. Knotted netting consisting of two systems of yarns is mostly manufactured on a knotting machine. The yarn of one of the two systems runs like a weaving warp from bobbins, while the yarn of the other system is wound on shuttles that guide it towards a hook-shaped
20、or needle-type knotting device. All the knots in one row are knotted simultaneously. 3.1.2 Single-yarn system. Knotted netting consisting of a single-yarn system is mostly hand made. The yarn is wound on a netting needle and all the meshes in the same row are knotted individually one after another.
21、A uniform mesh size may be achieved by the use of a mesh gauge during knotting. If the netting is made as a flat panel, then the netting yarn runs alternately from left to right and from right to left. If the netting is knotted round and round (as a “tube” or “cylinder”), then the yarn proceeds cont
22、inuously in the same direction. Figure 1 Two-yarn system Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:20:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5172:1975 2 BSI 12-1999 3.2 Type of knot. The following illustrations show the principal types of knot with their customary designati
23、ons; Figure 2 Single-yarn system Figure 3 Weavers knot Z-type Figure 4 Weavers knot S-type Figure 5 Double weavers knot Figure 6 Reef knot Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:20:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5172:1975 BSI 12-19993 3.3 Direction of stretch1).
24、The directions in which netting may be stretched are designated as follows. 3.3.1 N-stretch. This relates to netting stretched at right angles (Normal) to the general course of the netting yarn. 3.3.2 T-stretch. This relates to netting stretched parallel to the general course of the netting yarn (Tw
25、inewise). Netting may be stabilized after stretching, either by chemical or thermal means. 3.4 Size of netting and special features. The size of netting is specified by the following characteristics. 3.4.1 The number of meshes in both the T- and N-directions marked by the letters T and N respectivel
26、y following the figure in question and joined by the multiplication sign or by the number of meshes in one direction and the length, indicated in a recognized unit, for example metres, of the other direction, the netting being fully extended whilst the measurement is made. 3.4.2 The size of mesh in
27、millimetres (see ISO 1107). Special features are sometimes required or may be provided as a matter of course: these include edge meshes for joining or mounting purposes; reinforcement of netting (for example, double or heavier yarn); width of reinforcement indicated by number of meshes, and any inte
28、rmediate reinforcement that may be requested. 4 Description of netting yarns The features requiring descriptions are as follows. 4.1 Size. The designation shall follow the requirements laid down in ISO 858. 4.2 Material. The type of fibre shall be stated; descriptions of man-made fibre yarns shall i
29、ndicate whether the yarn is composed, for example, of staple fibres; one or more filaments; textured or bulked yarn or film. 5 Information to be exchanged 5.1 Indication of use. In order to assist the netting manufacturer to offer the most suitable type of netting for a particular type of fishing ne
30、t, the ultimate use of the netting shall be made known, for example, for gill-nets, trawl-nets, purse seine nets, etc. 5.2 Manufacture. The purchaser shall state which type of netting (see 3.1) is required. 5.3 Type of knot. If the purchaser has a preference for a particular type of knot (see 3.2),
31、he shall state this in his enquiry or order. 5.4 Direction of stretch. The purchaser shall state the direction of stretch required (see 3.3) and whether or not the netting is to be stabilized after stretching. 5.5 Size of netting. The purchaser shall specify the relevant details in accordance with 3
32、.4, noting that for size of mesh (see 3.4.2) it is necessary to choose between length of mesh (to be preferred), length of mesh side or opening of mesh, for example “length of mesh 50 mm”. 5.6 Netting yarns. If the purchaser requires specific yarns to be used, he shall give details in accordance wit
33、h section 4. Failing this, the netting manufacturer may use his discretion but any particulars given relating to the yarns used shall be furnished in terms of section 4. Furthermore, the purchaser shall specify if any special treatment (for example, resin bonding) of the netting yarn is required. 5.
34、7 Finish of netting. The purchaser shall specify what finishing process (if any) is required. The following are examples of possible processes. 5.7.1 White (natural), untreated. 5.7.2 White (natural), impregnated. 5.7.3 Dyed, without impregnation or other treatment. 5.7.4 Dyed and impregnated. 5.8 P
35、acking of netting. The purchaser shall advise the supplier on the following points. 5.8.1 Whether netting should be extended in the N-direction or in the T-direction before packing, if this direction is other than the direction of stretch. 5.8.2 The method of making-up, for example, lapped or rolled
36、. 5.8.3 Type of packaging required. 1) The term “stretch” in this context indicates either the operation of tightening of knots, or that of conferring a permanent shape by thermal or other means, or a combination of both processes. For the general definition of the symbols N and T for direction in n
37、etting see ISO 1107. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:20:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5172:1975 ISO 1530:1973 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British
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