BS-EN-12422-1999.pdf

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12422:1999 The European Standard EN 12422:1999 has the status of a British Standard ICS 59.080.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Sisal twines Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 September 1999 BSI 09-1999 ISBN 0 580 32716 7 BS EN 12422:1999 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the English language version of EN 12422:1999 The UK participation in its preparation was entrusted to Technical Committee TCI/77, Ropes, cordage and nets, which has the responsibility to: Ð aid enquirers to understand the text; Ð present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; Ð monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue. 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 document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 12422 NORME EUROPÉENNE EUROPÄISCHE NORMApril 1999 ICS 59.080.20 English version Sisal twines Ficelles sisalSisal-Bindegarne This European Standard was approved by CEN on 1 April 1999. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref. No. EN 12422:1999 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 12422:1999 © BSI 09-1999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 248, Textiles and textile products, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 1999, and conflicting national standards shall be withdrawn at the latest by October 1999. This standard includes an informative annex A. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12422:1999 © BSI 09-1999 1 Scope This European Standard specifies the essential characteristics of sisal twines. It specifies the way they are manufactured, methods for testing and the manner in which they are designated and presented commercially. This standard does not specify agricultural twines which are made from sisal. These twines are specified according to EN 25080:1993. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the document referred to applies. EN 10002-2, Metallic materials Tensile testing Part 2: Verification of the force measuring system of the tensile testing machines. EN 20139, Textiles Standard atmospheres for conditioning and testing. (ISO 139:1973) EN 919:1995, Fibre ropes for general service Determination of certain physical and mechanical properties. EN 25080:1993, Sisal agricultural twines. (ISO 5080:1977, modified) 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 twine product made from a single yarn, or from a number of plied yarns assembled in such a way as to form a continuous length 3.2 ply number of yarns composing the twine 3.3 batch definite quantity of twine produced under conditions which are presumed uniform 3.4 package number of balls or spools of twine which are contained within a common wrapper 3.5 breaking force maximum force that the twine can withstand when tested 3.6 minimum breaking force nominal breaking force which at least has to be achieved during the single tests Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 12422:1999 © BSI 09-1999 3.7 production run material which is made continuously on one machine or a set of machines with no changes being made to the machine settings and without any change in the material composition 3.8 laboratory test selection of all samples of one lot/production quantity for laboratory tests 3.9 cropping practice of trimming off fibres which protrude from the finished twine to produce a smoother profile 4 Designation A twine shall be designated by: a) the material from which the twine is made; b) the word twine; c) the number of plies in the twine; d) the nominal linear density of the twine in ktex; e) the direction of twist; f) the colour; g) the number of this standard. Example of designation: a sisal twine of 2 ply having a linear density of 2,04 ktex with “S” twist rust coloured conforming to EN 12422 is designated as follows: TWINE EN 12422 SISAL 2 2,04 S rust. 5 Manufacture 5.1 The fibre used for the manufacture of the twine shall consist of new genuine fibre of long staple; it shall be unadulterated, free from defects and true to form as follows: Sisal (Agave sisalana). 5.2 Each spool or ball of twine shall be continuous throughout its length, and with not more than 2 knots per spool or ball. It shall contain no loose ends. 5.3 The twine shall be supplied either cropped or uncropped as specified. NOTE Twines can be dyed to shades agreed by the supplier and the user. 6 Main requirements of sisal twines 6.1 When tested in accordance with clause 7 twines shall meet the requirements of Table 1. 6.2 When the permitted values are neither maxima nor minima, the permitted tolerances shall be as in Table 1. 6.3 When tested in accordance with 7.5, the water content of the twine shall not be greater than 16 %. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 12422:1999 © BSI 09-1999 Table 1 Main requirements of sisal twines No. of plies Linear density of single ply Linear density of twine Minimum breaking force No. of plies Linear density of single ply Linear density of twine Minimum breaking force tex(Equiv. metric no.) ktexm/kgdaNtex(Equiv. metric no.) ktexm/kgdaN Tolerance: ±9 %Tolerance: ±6 % 15 0000,25,002007535 0000,215,30 65245 13 3000,33,333005033 3000,310,20 98163 12 5000,42,504004032 5000,4 7,65131131 11 6700,61,675992631 6700,6 5,10196 87 11 2500,81,258002031 2500,8 3,82262 65 11 0001,01,001 0001731 0001,0 3,06327 56 Tolerance: ±6 %Tolerance: ±6 % 25 0000,210,20 9816245 0000,220,40 49328 23 3000,3 6,8014710843 3000,313,60 73218 22 5000,4 5,10196 8642 5000,410,20 98175 21 6700,6 3,40294 5741 6700,6 6,80147116 21 2500,8 2,55392 4341 2500,8 5,10196 87 21 0001,0 2,04490 3641 0001,0 4,08245 74 7 Methods of test 7.1 Sampling 7.1.1 The number of samples required in accordance with Table 2 shall be determined and the samples shall be taken from the batch at random. 1.1.2 Not more than one sample shall be taken from each package. Table 2 Number of samples Quantity in the production run No. of samples t 11 1 and 2,52 2,5 and 53 5 and 104 105 7.1.3 The first 10 m of twine shall be discarded at the end of the package. 7.1.4 Test samples shall be removed with care from the package so that twist is neither added nor removed from them. 7.2 Conditioning 7.2.1 The tests shall be carried out in ambient atmospheric conditions. 7.2.2 In case of arbitration, the specimens shall be left 24 h in the standard atmosphere for testing specified in EN 20139 which has a temperature of (20 ± 2) °C and a relative humidity of (65 ± 2) %, before continuing with the tests. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN 12422:1999 © BSI 09-1999 7.3 Determination of linear density 7.3.1 Measure a length of at least 10 m under sufficient tension by hand to straighten the twine. 7.3.2 Determine the mass of each specimen length to an accuracy of 0,5 %. 7.3.3 Calculate the linear density in the unitary system appropriate for the product. NOTE The expression of the result in tex units is recommended. 7.4 Determination of breaking force 7.4.1 Test specimen of twine using a tensile testing machine in accordance with EN 10002-2, which shall demonstrate a minimum accuracy of ±2 %. The testing machine shall be within its period of valid calibration. 7.4.2 Have a sufficient length of the specimen to provide a minimum effective length between the grips of the testing machine of 250 mm, conforming to EN 919:1995, annex B. 7.4.3 Secure the specimen in the testing machine by means of appropriate grips which have been designed for the purpose. Under no circumstances shall the specimen be connected to the grips by knotting. 7.4.4 Check that the speed of movement of the moving grips of the machine is constant and equal, in millimeters per minute, within ±10 %, to the length in millimetres of the specimen between the grips as defined in 7.4.2. 7.4.5 Perform six tests on each specimen. Each test shall be taken at a minimum distance of 5 m along the twine from the previous one. 7.4.6 Record each result in decanewtons. 7.4.7 The results, when averaged, shall equal or exceed those values quoted for the twine in Table 1. 7.4.8 Not more than two results of the six shall be less than 9 % for single ply twines, and 6 % for 2, 3 or 4 ply twines below those values quoted for the twine in Table 1. 7.5 Determination of water content 7.5.1 Unlay the twine into its component yarns. 7.5.2 Form a representative selection of these yarns into a hank weighing between 30 g and 50 g. 7.5.3 Weigh the hank prepared in 7.5.2 to the nearest 10 mg. Let this mass be M1. 7.5.4 Place the hank into an oven maintained at a temperature of (120 ± 5) °C for a period of at least 2 h or at a temperature of (100 ± 5) °C for a period of 24 h. 7.5.5 Remove the hank from the oven, and allow it to cool in a dessicator. 7.5.6 When the sample has cooled down to room temperature, reweigh it to the nearest 10 mg. Let this be M2. 7.5.7 Calculate the percentage water content of the original specimen from the expression: (M1 M2)/M2 × 100 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 7 EN 12422:1999 © BSI 09-1999 8 Test report A written test report shall be compiled after testing which will include: a) reference to this European Standard; b) test report reference; c) reference of the twine stated in this standard (description of the material); d) linear densities obtained for the specimen; e) individual breaking forces obtained for the specimen; f) average breaking forces obtained from the specimen; g) the average water content; h) any operating details and details of any incident liable to have an effect upon the results; i) date of the report, name, title, and signature of the person conducting the tests. 9 Commercial presentation 9.1 Sisal twines shall be supplied in balls or in spools. 9.2 All twines shall be neatly and securely made up into packages as ordered. NOTE 1 When the twines are supplied in ball, the recommended masses should be 100 g, 250 g, 500 g, 1 kg or 2,5 kg. NOTE 2 When the twines are supplied in spool, the recommended masses should be 1 kg or 2,5 kg. 9.3 The nominal mass of balls and of spools shall be subject to a tolerance of ±8 %. 9.4 When the twines are supplied by mass, the gross mass shall not differ from that ordered by more than ±4 % for nominal ordered quantities of 1 000 kg and less and by more than ±3 % for above 1 000 kg. The invoiced mass shall be the actual gross mass of the twine obtained by weighing. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 8 EN 12422:1999 © BSI 09-1999 Annex A (informative) Table A.1 Approximate diameters of sisal twines No. of pliesLinear density of single ply Linear density of single ply Approx. diameter No. of pliesLinear density of single ply Linear density of single ply Approx. diameter tex(Equiv. metric no.) mmtex(Equi