www bzfxw com BRITISH STANDARD BS EN 559 1994 Incorporating Amendment No 1 Gas welding equipment — Rubber hoses for welding, cutting and allied processes The European Standard EN 559 1994 has the stat[.]
BRITISH STANDARD BS EN 559:1994 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Incorporating Amendment No Gas welding equipment — Rubber hoses for welding, cutting and allied processes The European Standard EN 559:1994 has the status of a British Standard UDC 621.643.3.02:621.791:620.1:62-777 BS EN 559:1994 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1994 © BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference WEE/18 Draft for comment 91/82471 DC ISBN 580 23377 Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standard Finland Suomen Standardisoimisliito, r.y France Association franỗaise de normalisation Germany Deutsches Institut für Normung e.V Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugs da Qualidade Spain Asociación Espola de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd No Date Comments 8800 September 1995 Indicated by a sideline in the margin BS EN 559:1994 Contents Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Cooperating organizations National foreword Foreword Text of EN 559 National annex NA (informative) Committees responsible National annex NB (informative) Cross-references © BSI 07-1999 Page Inside front cover ii Inside back cover Inside back cover i BS EN 559:1994 National foreword Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard has been prepared under the direction of the Engineering Sector Board and is the English language version of EN 559:1994 Gas welding equipment — Rubber hoses for welding, cutting and allied processes, published by the European Committee for Standardization (CEN) EN 559 was produced as a result of international discussion in which the UK took an active part BS EN 559:1994 supersedes BS 5120:1987 which is withdrawn 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, pages i and ii, the EN title page, pages to 10, an inside back cover 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 ii © BSI 07-1999 EUROPEAN STANDARD EN 559 NORME EUROPÉENNE August 1994 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPÄISCHE NORM UDC 621.643.3.02:621.791:620.1:62-777 Descriptors: Welding equipment, gas welding, gas cutting, arc welding, hoses, rubber hoses, dimensions, dimensional tolerances, physical properties, specifications, colour codes, marking English version Gas welding equipment — Rubber hoses for welding, cutting and allied processes Matérial de soudage aux gaz — Tuyaux souples en caoutchouc pour le soudage, le coupage et les techniques connexes Gasschweißgeräte — Gummi-Schläuche für Schweißen, Schneiden und verwandte Verfahren ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ This European Standard was approved by CEN on 1994-06-09 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, 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 © 1994 Copyright reserved to CEN members Ref No EN 559:1994 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 Foreword This European Standard was prepared by the Technical Committee CEN/TC 121 “Welding” of which the secretariat is held by DS It is based on ISO 3821:1992 Welding — Rubber hoses for welding, cutting and allied processes CEN/TC 121 has decided to submit the final draft for formal vote by its resolution 183/1993 The result was positive 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 February 1995, and conflicting national standards shall be withdrawn at the latest by February 1995 According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom Contents Foreword Scope Normative references Materials Dimensions and tolerances Physical properties of lining and cover Requirements Colour identification and marking Annex A (normative) Method of test for non-ignition Annex B (normative) Method of test for resistance to n-pentane Annex C (normative) Method of test for resistance to incandescent particles and hot surfaces Figure A.1 — Apparatus for ignition tests on lining samples Figure C.1 — Circuit diagram for the test apparatus Figure C.2 — Test apparatus Figure C.3 — Perpendicular force on the hose Table — Nominal bore, tolerances and concentricity Table — Tensile strength and elongation at rupture Table — Hydrostatic requirements Table — Colour coding and marking Page 3 3 4 8 10 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 10 5 © BSI 07-1999 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 Scope This standard specifies requirements for rubber hoses for welding, cutting and allied processes The term “allied processes” means, in particular, heating, brazing and metallization Requirements for rubber hoses for normal duty and light duty [limited to hoses for maximum working pressure up to MPa (10 bar) and with nominal bore less than or equal to 6,3 mm] are specified Plastics hoses are excluded from this standard Different colours and markings are specified for identification of the gas NOTE If hoses for liquefied petrol gases are used without regulators the use of light duty hoses is not allowed NOTE In the cases of hoses for use with liquid flux dispensers fitted in the fuel gas supply line, the manufacturer should be consulted on the suitability of the hose for this application This standard applies to hoses used in: a) gas welding and cutting; b) arc welding under the protection of an inert or active gas; c) processes allied to welding and cutting This standard does not apply to hoses used for high pressure acetylene [more than 0,15 MPa (1,5 bar)] Normative references Materials 3.1 Construction The hose shall consist of: a) a rubber lining of a minimum thickness of 1,5 mm; b) a rubber cover of a minimum thickness of 1,0 mm; c) reinforcement applied by any suitable technique ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 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 publication referred to applies ISO 37:1977, Rubber, vulcanized — Determination of tensile stress-strain properties ISO 188:1982, Rubber, vulcanized — Accelerated ageing or heat-resistance tests ISO 471:1983, Rubber — Standard temeperatures, humidities and times for the conditioning and testing of test pieces ISO 1307:1992, Rubber and plastics hoses for general-purpose industrial applications — Bore diameters and tolerances, and tolerances on length ISO 1402:1984, Rubber and plastics hoses and hose assemblies — Hydrostatic testing ISO 1817:1985, Rubber, vulcanized — Determination of the effect of liquids ISO 4080:1991, Rubber and plastics hoses and hose assemblies — Determination of permeability to gas © BSI 07-1999 EN 21746:1993, Rubber or plastics hoses and tubing — Bending tests EN 24671:1993, Rubber and plastics hose assemblies — Methods of measurement of dimensions EN 24672:1993, Rubber and plastics hoses — Sub-ambient temperature flexibility tests EN 27326:1993, Rubber and plastics hoses — Assessment of ozone resistance under static conditions EN 28033:1991, Rubber and plastics hoses — Determination of adhesion between components 3.2 Manufacture The lining and cover shall be of uniform thickness and free from holes, porosity and other defects The hose may or may not be made using a mandrel and the finish may be smooth, fluted or fabric marked Dimensions and tolerances 4.1 Bore sizes The bore of the hoses shall be in accordance with the nominal dimensions and tolerances shown in Table Table — Nominal bore, tolerances and concentricity Dimensions in millimetres Nominal bore 4,0 5,0 6,3 Tolerances ± 0,55 8,0 10,0 ± 0,65 12,5 16,0 ± 0,70 20,0 ± 0,75 Concentricity 1,0 max 1,25 max 1,50 max NOTE The tolerances and bore sizes (excluding 20 mm nominal bore) not comply with ISO 1307:1992, Table NOTE For intermediate dimensions, numbers should be chosen from the R20 series of preferred numbers with tolerances as for the next larger bore size shown in Table Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 4.2 Concentricity (total indicated reading) 5.4 Resistance to liquids The concentricity of the hose, measured according to EN 24671, shall be in accordance with the values given in Table 5.4.1 Resistance to acetone and dimethylformamide (DMF) for acetylene hoses 4.3 Cut lengths and tolerances The tolerances for cut lengths shall be in accordance with ISO 1307 A sample of the lining when immersed in the test solvent at standard laboratory temperature as defined in ISO 471 for 70 h shall not increase in mass by more than % when calculated by the method in ISO 1817 Physical properties of lining and cover 5.4.2 Resistance to n-pentane for LPG1) and MPS2) hoses 5.1 Tensile strength and elongation at rupture A sample of the hose lining, when tested as described in Annex B, shall show n-pentane absorbed not exceeding 15 % and n-pentane extractable matter not exceeding 10 % The rubber used in the lining and cover shall, when tested in accordance with ISO 37, have a tensile strength and elongation at rupture not less than the values given in Table Table — Tensile strength and elongation at rupture Tensile strength N/mm2 Lining Cover Elongation at rupture % 200 250 5.2 Accelerated ageing After ageing for days at a temperature of 70 °C as described in ISO 188, (normal oven) the tensile strength and elongation at rupture respectively of the lining and cover shall not decrease by more than 25 % for the tensile strength and 50 % for elongation at rupture from the values given in Table 5.3 Non-ignition requirement for oxygen hoses When tested by the method described in Annex A, three samples of the lining shall remain in the apparatus at a constant temperature of 360 °C to 365 °C for without ignition If more than one of the samples show evidence of ignition in less than min, the hose shall be considered not to comply If only one sample shows evidence of ignition in less than min, three further samples shall be prepared and tested If any of the three samples in this second series shows evidence of ignition in less than min, the hose shall be deemed not to comply Requirements 6.1 Hydrostatic requirements The hose, when tested in accordance with ISO 1402, shall meet the requirements of Table 6.2 Adhesion When tested in accordance with EN 28033 using the type or type test piece the minimum adhesion between adjacent components shall be 1,5 kN/m ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 6.3 Flexibility When tested in accordance with EN 21746 at standard laboratory temperature as defined in ISO 471 using a diameter of curvature (C) of 10 times the nominal bore (with a minimum of 80 mm), and a coefficient of deformation (K) of not less than 0,8 There shall be no kink in the curved portion of the hose 6.4 Low temperature flexibility When tested in accordance with EN 24672:1993, method B, at (– 25 ± 3) °C using a diameter of 10 times the nominal bore (with a minimum of 80 mm), the hose shall show no signs of leaks when subjected to the proof pressure (carried out at ambient temperature) stated in Table 6.5 Resistance to incandescent particles and hot surfaces The cover of the hose shall have sufficient resistance to contact with incandescent particles and hot surfaces To meet this requirement, the test piece shall resist for 60 s the test conditions given in Annex C without leaking 6.6 Ozone resistance When tested in accordance with EN 27326:1993, method 1, the cover shall show no evidence of cracking under two times magnification 1) LPG: liquified petroleum gases 2) MPS: methylacetylene-propadiene mixtures © BSI 07-1999 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 Table — Hydrostatic requirements Rating Light duty Normal duty Nominal bore k 6,3 all sizes Maximum design working pressure MPa (10 bar) MPa (20 bar) Proof pressure MPa (20 bar) MPa (40 bar) Minimum burst pressure MPa (30 bar) MPa (60 bar) Change in length at maximum design working pressure ±5% Change in diameter at maximum design working pressure ± 10 % 6.7 Permeability to gas for LPG and MPS hoses 7.3 Marking When tested in accordance with ISO 4080:1991 using a test gas of 95 % propylene at cylinder pressure [approximately 0,6 MPa (6 bar)] and standard laboratory temperature of 23 °C as defined in ISO 471 the gas permeance shall not exceed 25 cm3/h, irrespective of bore size The hose cover shall be continuously and durably marked at least every 000 mm with the following information: a) the number of this European Standard: EN 559; b) the maximum design working pressure in MPa and between brackets in bar; c) the nominal bore size; d) the manufacturer’s or supplier’s mark (in the example given as X Y Z); e) the year of manufacture Example: EN 559 – MPa (20 bar) – 10 – XYZ – 94 Colour identification and marking 7.1 General The hose cover material shall be coloured throughout and marked as follows 7.2 Colour identification ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ In order to identify the gas for which the hose is to be used the hose cover shall be coloured as given in Table Table — Colour coding and marking Gas Colour of cover Acetylene and other combustible gasesa (except LPG, MPS, natural gas) Red Oxygenb Blue Air, nitrogen, argon, CO2 Black LPG, MPS, natural gas Orange a The manufacturer shall be consulted on the suitability of the hose for use with hydrogen b Also includes air/oxygen mixtures with an oxygen content of more than 20 % © BSI 07-1999 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 Annex A (normative) Method of test for non-ignition A.1 Apparatus The apparatus shown in Figure A.1 is required, together with the following: — heating furnace: 350 W, internal dimensions 150 mm deep by 50 mm diameter; — tubular sliding resistance: 190 to 200 with screw movement or an auto-transformer with continuously variable output voltage; — calibrated flowmeter for oxygen: to l/min at 15 °C and atmospheric pressure; — nitrogen-filled mercury-in-glass thermometer: suitable for use at 150 mm immersion, graduated from approximately 300 °C to 400 °C in intervals of not more than °C, the graduations to start not less than 200 mm above the bulb A.2 Procedure Insert the ignition test apparatus, in its aluminium foil wrapping, into the electric furnace The purpose of the aluminium foil is a) to minimize radiant heat; and b) to obtain more uniform temperature distribution Adjust the energy supply to the electric furnace with the variable resistance or auto-transformer so that a constant temperature of 360 °C to 365 °C is maintained with the oxygen flowing at (2 ± 0,1) l/min Cut the sample of rubber lining for test, after cleaning by buffing, into blocks of mm3 to 10 mm3 in which no side shall be less than 1,3 mm nor greater than 2,5 mm When the furnace is at constant temperature, remove the sample holder, impale a sample block of the rubber lining under test on the tungsten point and replace the sample holder in the apparatus It is necessary for this operation to be carried out quickly, so that cooling is reduced to a minimum Retain the sample in the apparatus for at least and observe it carefully during this period, for evidence of ignition Fumes may be observed but this does not constitute evidence of ignition, which is normally accompanied by a flash and sometimes by a small explosion Test three samples consecutively NOTE When ignition of a sample occurs, the temperature of the apparatus may rise and then it is essential that a lapse of time is allowed, to permit the temperature to return to the appropriate testing temperature NOTE It is essential that the tungsten point is kept clean and sharp ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 07-1999 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 Figure A.1 — Apparatus for ignition tests on lining samples © BSI 07-1999 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 Annex B (normative) Method of test for resistance to n-pentane Weigh a portion of the hose lining and then immerse it in n-pentane at standard laboratory temperature for 72 h The volume of the n-pentane shall be at least 50 times the volume of the test piece Following immersion reweigh the test piece after conditioning in air at room temperature and reweigh again after 24 h further conditioning under these conditions Calculate the n-pentane absorbed and the n-pentane-extractable matter using the following expressions: a) percentage n-pentane absorbed: ( M – M2 ) × 100 M0 Annex C (normative) Method of test for resistance to incandescent particles and hot surfaces A sample of hose, approximately 500 mm in length, shall be clamped in the test apparatus (see Figure C.2) The CrNi steel heating wire (2,5 mm diameter) shall be clamped between the electrical connections, spaced 100 mm apart The downward force of the incandescent wire, perpendicular to the hose axis, shall be N during the duration of the test During the test the hose shall be filled with an inert gas, e.g nitrogen, at a pressure of 0,1 MPa (1 bar) The wire shall be heated with a current of 50 A, V max., to obtain a temperature of approximately 800 °C b) percentage extractable matter: ( M0 – M2 ) × 100 M0 where: M0 is the initial mass of the test piece; M1 is the mass of the test piece after immersion and conditioning; M2 is the mass of the test piece after 24 h further conditioning © BSI 07-1999 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 Figure C.1 — Circuit diagram for the test apparatus © BSI 07-1999 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 559:1994 Figure C.2 — Test apparatus Figure C.3 — Perpendicular force on the hose 10 © BSI 07-1999 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 559:1994 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Engineering Sector Board to Technical Committee WEE/18 upon which the following bodies were represented: British Compressed Gases Association British Railways Board Consumer Policy Committee of BSI Department of Trade and Industry (Consumer Safety Unit, CA Division) Health and Safety Executive LP Gas Association Railway Industry Association of Great Britain South Bank University Welding Manufacturers Association (BEAMA Ltd.) National annex NB (informative) Cross-references Publication referred to Corresponding British Standard EN 21746:1993 BS EN 21746:1993 Rubber or plastics hoses and tubing Bending tests EN 24671:1993 BS EN 24671:1993 Rubber and plastics hose and hose assemblies Methods of measurement of dimensions EN 24672:1993 BS EN 24672:1993 Rubber and plastics hoses Sub-ambient temperature flexibility tests EN 27326:1993 BS EN 27326:1993 Rubber and plastics hoses Assessment of ozone resistance under static conditions EN 28033:1993 BS EN 28033:1993 Rubber and plastics hose Determination of adhesion between components BS 903 Physical testing of rubber ISO 188:1982 Part A19:1986 Heat resistance and accelerated ageing tests ISO 471:1983 Part A35:1985 Temperatures, humidities and times for conditioning of test pieces ISO 1307:1992 BS 6597:1985 Specification for rubber and plastics hoses: internal diameters and tolerances and tolerances on length BS 5173 Methods of test for rubber and plastics hoses and hose assemblies ISO 1402:1984 Section 102.1:1991 Hydrostatic tests BS 903 Physical testing of rubber ISO 1817:1985 Part A16: 1987 Determination of the effect of liquids BS 5173 Methods of test for rubber and plastics hoses and hose assemblies ISO 4080:1991 Section 103.11:1992 Determination of gas permeance © BSI 07-1999 BS EN 559:1994 BSI — British Standards Institution Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:02:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 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 should 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 committee 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 BSI, 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 otherwise 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 products 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 Administration 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 internationalstandardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, 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, 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 BSI 389 Chiswick High Road London W4 4AL 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