1、1 STD-BSI BS EN L327-ENGL L77b Lb24bb7 0.582812 bL5 BRITISH STANDARD Gas welding equipment - Thermoplastic hoses for welding and allied processes The European Standard EN 1327 : 1996 has the status of a British Standard ICs 23.040.70; 25.160.30 BS EN 1327 : 1996 NO COPYING WITHOUT BSI PERMISSION EXC
2、EPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS El! 3327-ENGL 377b LbZibb7 8582833 553 Amd. No. BS EN 1327 : 1996 Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee WEW18, Gas welding and cutting appliances,
3、upon which the following bodies were represented: British Compressed Gases Association British Railways Board Consumer Policy Committee of BSI Department of hade and indusbry (Consumer Safety Unit, CA Division) Heaith and Safety Executive LP Gas Association Railway Industry Association South Bank Un
4、iversity Welding Manufacturem Association (BEAMA Ltd.) 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 1996 O BSI 1996 The following BSI references relate to
5、 the work on this standard: Committee reference WEW18 Draft for comment 94702583 DC ISBN O 680 26272 3 STD-BSI BS EN 1327-ENGL 377b 3b24bb7 0582834 498 W BS EN 1327 : 1996 Contents Page Committees responsible Inside hnt cover National foreword ll Foreword 2 Text of EN 1327 3 O BSI 1996 1 STD-BSI BS
6、EN L327-ENGL L77b Lb24bb7 0582835 324 BS EN 1327 : 1996 National foreword This British standard has been prepared by Technical Committee WEFY18 and is the Enghsh language vesion of EN 1327 : 1996 Gas welding equipment - Themzoplastic hoses for welding and allied pmcesses, published by the European C
7、onunittee for Standardization (CEN). EN 1327 : 1996 was produced as a resuit of international discussion in which the UK took an active part. It is assumed that the execution of the provisions of the document is entnisted to suitably qualified and experienced persons. Cross-references Publication re
8、ferred to EN 559 : 1994 EN 1326 : 1996 EN IS0 4080 : 1995 EN 21746 : 1993 EN 24671 : 1993 EN 24672 : 1993 EN 28033 : 1993 IS0 37 : 1994 EN 20105A02 : 1994 IS0 176 : 1976 IS0 188: 1982 IS0 471 : 1995l) IS0 1307: 1992 Corresponding British Standard BS EN 559 : 1994 Gas welding equipment - Rubber hses
9、for welding, cutting and allied processes BS EN 1326 : 1996 Gas welding equipment - SmaU kits for gas brazing and welding BS EN IS0 4080 : 1995 Rubber and plastics hoses and hose assemblies -Determination of permeabity to gas BS EN 21746 : 1993 Rubber or plastics hoses and tubhg - Bending tests BS E
10、N 24671 : 1993 Rubber and plastks hoses and hose assemblies - Methods of measurement and dimenswns BS EN 24672 : 1993 Rubber and plastics hoses - Sub-ambient tempemturefleJribility tests BS EN 28033 : 1993 Rubber and plastics hoses - Determination of adhesion between components BS 903 Physical testi
11、ng of rubber Part A2 : 1995 Method for determination of tenSue stress-stmin properties BS EN 20105 Textiles - Tests for colour fastness Part A02 : 1995 Grey scale for assessing staining BS 2782 Methods of testing plastics Part 4 : chem.ical properties Methods 466A and 465B : 1979 Determination of lo
12、ss of piasticizers (activated carbon method) BS 903 Physical testing of rubber Part A19 : 1986 Heat resistance and mmted ageing tests Part A35 : 1985 Temperatures, humidities and times for conditioning and testing of test pieces BS 6597 : 1985 Spec 25.160.30 Descriptors: Gas welding, gas pipelines,
13、plastic tubes, hoses, thermoplastic resins, specifications, dimensions, dimensional tolerances, colours, physical properties, hydrostatic pressure, marking Ehgbh version Gas welding equipment - Themnoplastic hoses for weldrng and allied processes Matriel de soudage aux gas - niyaux souples en matire
14、 thermoplastique pour le soudage et les techniques connexes GaSschweBgerate - Thermoplastische schlauche zum SchweiBen und fr verwandte Verfahren This European Standard was approved by CEN on 1996-0501. CEN members ase bound to comply with the CENKENELEC Intend Regulations which stipuiate the condit
15、ions 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 wplication to the Central Secretanat or to any CEN member. This European Standard exists in three off
16、icial versions (English, French, Gem). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Cenh-al Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria
17、, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Iw, Luxembourg, Netherlands, Norwax Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fur Normung Central Secretariat: rue de Stass
18、art 36, B-1050 Brussels O 1996 Copyright reserved to CEN members Ref. No. EN 1327 : 1996 E STD.BSI BS EN 1327-ENGL 177b Lb24bb7 0582817 IT7 Page 2 EN 1327 : 1996 Foreword This European Standard has been prepared by lchnid Committee CEN/rC 121, Welding, of which the secretariat is held by DS. This Eu
19、ropean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 1996, and conflicting nationai standards shall be withdrawn at the latest by November 1996. According to the CENKENELEC Internal Regulations, the
20、national standards organizations of the following countries are bound to implement this European standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, I*, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Swilzerland and the United Kingdom. Contents Forewor
21、d 1 Scope 2 Normative references 3 Materials 4 6 6 Performance requirements 7 Colour identification and marking Annexes A B Dimensions, hits of deviation and colours Physid properties of lining and cover (normative) Method of test for resistance to n-pentane (normative) Method of test for resistance
22、 to incandescent particles and hot surfaces (normative) Method of test for non-ignition C page 2 3 3 3 6 6 8 O BSI 1996 1 scope This European Standard specifies the requirements and relevant methods of measurement and test of two types of thermoplastic hoses with maximum design working pressure of 1
23、 MPa and 2 MPa respectively, used for flexible gas supply lines in specific fields of application as follows: - smail kits according to EN 1326; - - miniature welding such as jeweilery work, dentism work excluding acetylene applications; - arc welding with shielding gas. NOTE. This standard does not
24、 exclude the use of rubber hoses in the same fields of application. Rubber hoses for these applications are covered by EN 559. This standard does not apply to hoses for liquified petroleum gases (LPG) in liquid phase and acetylene. The hose manufacturer shall be consuited for compatibility of the ho
25、se to hydrogen application. 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 , subse
26、quent amendments to or revision of any of these publications apply to this European Stanard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 559 EN 1326 EN IS0 4080 EN 21746 EN 24671 Gas weiding equipment - Ru
27、bber hoses for welding, cutting and died processes Gas weing equipment - Small kits for gas brazing and weiding Rubber and plastics hoses and hose assemblies - Detemzinatwn of pmab.ility to gas (Is0 4080 : 1991) Rubber or plastics hoses and tubing - Bending tests (IS0 1746 : 1983) Rubber and plastic
28、s hoses and hose assernblia - Methods of measurement of diwwns (IS0 4671 : 1984) Page 3 EN 1327 : 1996 EN 24672 Rubber and plastics hoses - Sub-ambient tempmcUre Jkxibity tests (IS0 4672 : 1988) Rubber and plastics hose - Determination of mion between c0mpOnents (Is0 8033 : 1991) Rubber, wkanized or
29、 themwplastic - Deermination of tens c) an external cover consisting of a thermoplastic composition. The total wall thickness of the hose shaii not be less than 2,5 mm. 3.2 Manufacture The lining and cover shall be of uniform thickness, concentric and free from air bubbles, porosity and other imperf
30、ections. O BSI 1996 STD-BSI BS EN L327-ENGL L77b W Lb2qbb9 0582819 T7T = 5 6,3 8 10 Page 4 EN 1327 : 1996 f 0,40 1,0 max. f 0,40 1,O ma. f 0,50 1,25 max. f 0,50 1,25 max 4 Dimensions, limits of deviation and colours 4.1 Bore sizes and colours The nominal inted diameters and colours shall comply with
31、 the values given in tables 1 and 2. Rating Lining Cover Table 1. Bore sizes and colours for oxy-fuel gas blowpipes and aipfuel gas blowpipes Dimensions in millimetres Tensile strength Elongation at N/IlUn2 % 25 2 200 27 2 250 break Gases Gases ther non-combustible gaseSand!- except oxygen) Hydrogen
32、) or other combustible gases excluding Arc welding Colour applications of cover (shielding gas) bore sizes 3,2; 4; 5; 6,3; S; 10 black Applications Bore sizes for oxy-fuel e- blowpipes 3,2and4 Bore sizes for air-fuel gas blowpipes Colour of cover red I oWgen4) 13,2and4 I I blue The manufacturer shal
33、l be consulted for compatibility of the hose to hydrogen appiication. 2, Liquifiied petroleum gases. 3, Methylacetylenepropadiene-mixtures. 4, b) the maximum design worm pressure in megapascals Pa) and between brackets in baq c) the nominal bore size in millimetres; d) the manufacturers name or supp
34、liers mark (in the example given as XYZ); e) the quarter (Q) and year of manufacture using two last digits. Example: EN 1327 - 2 MPa (20 bar) - 6,3 mm - XYZ - 1 Q 92 3, C for 80 nun for bore sizes 3,2 mm to 6,3 m, C for 90 mm for bore size 8 nun; C for 100 mm for bore sue 10 mm. O BSI 19% STD.BS1 BS
35、 EN 3327-ENGL L77b Zb2Libb7 0582823 b28 Page 6 EN 1327 : 1996 Annex A (normative) Method of test for resistance to n-pentane A.l immerse it in *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. A.2 Following imme
36、rsion reweigh the test piece after 5 min conditioning in air at room temperature and reweigh again after 24 h further conditioning under these conditions. A.3 Calculate the n-pentane absorbed and the Izrpentaneextractable matter using the following elqressions: Weigh a portion of the hose lining and
37、 then a) percentage n-pentane absorbed: b) percentage extractable matkc (Mo - Mz) I MO where MO Ml Mz is the initial mass of the test piece; is the mass of the test piece after immemion and 5 min conditioning; is the mass of the test piece after 24 h further conditioning. Annex B (normative) Method
38、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 B.2). The CrNi steel heating wire (2,5 mm diameter) shall be clamped between the electrical connections, spaced 100 mm apart. The dow
39、nward force of the incandescent wire, perpendicular to the hose axis, shall be 1 N during the duration of the test. During the test the hose sha be Wed with an inert gas, e.g. nitsogen, at a pressure of 0,l Mpa (1 bar). The wire shall be heated with a current of 17 A, max. 0,5 V, to obtain a tempera
40、twe of approximately 225 “C. if the first test fails, the two subsequent tests shall be SatiSfat4)v. Variable output transformer I CrNi wire 0 2,5 mm 7 Isolation transformer I = 17A U, = 0,5 V Figure B.1 Circuit diagram for the test apparatus O BSI 1996 STD-BSI BS EN 1327-ENGL L79b m 1b211bb7 058282
41、2 5b11 = Page 7 EN 1327 : 1996 Thermocouple to verify test temperature of Current conductors Flexible hose pressurized to 1 bar excess pressure Figure B.2 Test apparatus gas = NZ Force 1 N 1 CrNi wire 18 8 Figure B.3 Perpendicular force on the hose O BSI 1996 STD-BSI BS EN 1327-ENGL 1776 Lb24bb9 058
42、2823 4T0 Page 8 EN 1327 : 1996 Annex C (normative) Method of test for non-ignition C.l Apparatus The apparatus shown in figure C.l is required together with the foilowing. C.l.l Heatingfurnace: 350 W, inted dimensions : 150 mm deep by 50 mm diameter. C.1.2 lbular sliding resistance: 190 LR to 200 LR
43、, with screw movement or an aubtransformer with continuously variable output voltage. C.1.3 Calibrutedjlowmeter for oxygen: O to 5 Vmin at atmospheric pressure and 15 “C. C.1.4 Nitrogen-fllled mercuw-in-glass thermometer: suitable for use at 150 mm immersion, graduated up to 200 “C in intervais of n
44、ot more than 5 OC, the grauations to start not less than 200 mm above the bulb. C.2 Procedure Insert the ignition test apparatus, in its aluminium foil wrapping, into the electric furnace. The purpose of the aluminium foil is to minimize radiant heat and to obtain a more uniform temperature distribu
45、tion. Aqjust the energy supply to the electric furnace with the variable resistance or aubtransformer so that a constant temperature of 180 “C to 185 “C is maintained with the oxygen flowing at (2 I 0,l) Vmin. Cut the sample of rubber lining for test, after cleaning by buffing, into blocks of 8 mm3
46、to 10 mm3 of which no side shall be less than 1,3 mm nor greater han 2,5 nun. When the furnace is at constant temperature, remove the sample holder, impaie a sample block of the rubber hing under test on the tungsten point and replace the sample holder in the apparatus. It is necessary for this oper
47、ation to be carried out quickly, so that cooling is reduced to a minimum. The tungsten point should be kept clean and sharp. Retain the sample in the apparatus for at least 2 min and observe it carefully during this period, for evidence of ignition. Fumes can be observed but this shall not constitut
48、e evidence of ignition, which is nody accompanied by a flash and sometimes by a small explosion. When ignition of a sample occurs, the temperature of the apparatus can rise and it is then essential that time is allowed to permit the temperature to return to the appropriate testing temperature. Test
49、three samples consecutively. O BSI 1996 STD*BSI BS EN L327-ENGL L77b m Lb24bb7 0582824 337 m Page 9 EN 1327 : 1996 h Thermometer Heat resistant packing 31 Orifice r L Aluminium foil tungsten wire with a diameter of 0,7 mm tapered to a fine point and (20 f 0.5) mm long Dimensions in miiiimetres Constructed from borosilicate ass tubing of waii thickness: - 0,75 mm to 1,25 mm for a diameter of 6 mm to 9 mm; - 1 mm to 2 mm for a diameter of 36 mm to 46 mm. Figure C.l Apparatus for ignition tests on lining samples O BSI 1996 STD-BSI BS EN L3
