BS EN 1327-1996 Gas welding equipment - Thermoplastic hoses for welding and allied processes《气焊设备 焊接和类似工艺用热固性软管》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1327 : 1996 The Eur

2、opean Standard EN 1327 : 1996 has the status of a British Standard ICS 23.040.70; 25.160.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Gas welding equipment Thermoplastic hoses for welding and allied processesThis British Standard, having been prepared under the direction

3、 of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1996 BSI 1996 The following BSI references relate to the work on this standard: Committee reference WEE/18 Draft for comment 94/702583 DC ISBN 0 580 26272 3 BS EN 1327 : 19

4、96 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee WEE/18, Gas welding and cutting appliances, upon which the following bodies were represented: British Comp

5、ressed 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 South Bank University Welding Manufacturers Association (BEAMA Ltd.)BS EN

6、1327 : 1996 BSI 1996 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 1327 3ii BSI 1996 BS EN 1327 : 1996 1) ISO 471 : 1983 has been replaced by ISO 471 : 1995, to which the corresponding British Standard is BS 903 : Part A35 : 1985. National forew

7、ord This British Standard has been prepared by Technical Committee WEE/18 and is the English language version of EN 1327 : 1996 Gas welding equipment Thermoplastic hoses for welding and allied processes, published by the European Committee for Standardization (CEN). EN 1327 : 1996 was produced as a

8、result of international discussion in which the UK took an active part. It is assumed that the execution of the provisions of the document is entrusted to suitably qualified and experienced persons. Cross-references Publication referred to Corresponding British Standard EN 559 : 1994 BS EN 559 : 199

9、4 Gas welding equipment Rubber hoses for welding, cutting and allied processes EN 1326 : 1996 BS EN 1326 : 1996 Gas welding equipment Small kits for gas brazing and welding EN ISO 4080 : 1995 BS EN ISO 4080 : 1995 Rubber and plastics hoses and hose assemblies Determination of permeability to gas EN

10、21746 : 1993 BS EN 21746 : 1993 Rubber or plastics hoses and tubing Bending tests EN 24671 : 1993 BS EN 24671 : 1993 Rubber and plastics hoses and hose assemblies Methods of measurement and dimensions EN 24672 : 1993 BS EN 24672 : 1993 Rubber and plastics hoses Sub-ambient temperature flexibility te

11、sts EN 28033 : 1993 BS EN 28033 : 1993 Rubber and plastics hoses Determination of adhesion between components ISO 37 : 1994 BS 903 Physical testing of rubber Part A2 : 1995 Method for determination of tensile stress-strain properties EN 20105-A02 : 1994 BS EN 20105 Textiles Tests for colour fastness

12、 Part A02 : 1995 Grey scale for assessing staining ISO 176 : 1976 BS 2782 Methods of testing plastics Part 4 : Chemical properties Methods 465A and 465B : 1979 Determination of loss of plasticizers (activated carbon method) ISO 188 : 1982 BS 903 Physical testing of rubber Part A19 : 1986 Heat resist

13、ance and accelerated ageing tests ISO 471 : 1995 1) Part A35 : 1985 Temperatures, humidities and times for conditioning and testing of test pieces ISO 1307 : 1992 BS 6597 : 1985 Specification for rubber and plastics hoses: internal diameters and tolerances and tolerances on length Compliance with a

14、British Standard does not of itself confer immunity from legal obligations.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 1327

15、: 1996 E EUROPEAN STANDARD EN 1327 NORME EUROPE ENNE EUROPA ISCHE NORM May 1996 ICS 23.040.70; 25.160.30 Descriptors: Gas welding, gas pipelines, plastic tubes, hoses, thermoplastic resins, specifications, dimensions, dimensional tolerances, colours, physical properties, hydrostatic pressure, markin

16、g English version Gas welding equipment Thermoplastic hoses for welding and allied processes Mate riel de soudage aux gas Tuyaux souples en matie re thermoplastique pour le soudage et les techniques connexes Gasschweigera te Thermoplastische Schla uche zum Schweien und fu r verwandte Verfahren This

17、European Standard was approved by CEN on 1996-05-01. 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 co

18、ncerning 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 o

19、wn language and notified to the CEN 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, Switz

20、erland and United Kingdom.Page 2 EN 1327 : 1996 BSI 1996 Foreword This European Standard has been prepared by Technical Committee CEN/TC 121, Welding, of which the secretariat is held by DS. This European Standard shall be given the status of a national standard, either by publication of an identica

21、l text or by endorsement, at the latest by November 1996, and conflicting national standards shall be withdrawn at the latest by November 1996. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Stan

22、dard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Materials 3 4 Dimensions, limits of deviation and co

23、lours 4 5 Physical properties of lining and cover 4 6 Performance requirements 5 7 Colour identification and marking 5 Annexes A (normative) Method of test for resistance to n-pentane 6 B (normative) Method of test for resistance to incandescent particles and hot surfaces 6 C (normative) Method of t

24、est for non-ignition 8Page 3 EN 1327 : 1996 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 MPa and 2 MPa respectively, used for flexible gas supply lines in

25、specific fields of application as follows: small kits according to EN 1326; air-aspirated blowpipes for welding and allied processes; miniature welding such as jewellery work, dentistry work excluding acetylene applications; arc welding with shielding gas. NOTE. This standard does not exclude the us

26、e 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 consulted for compatibility of the hose to hydrogen

27、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 , subsequent amendment

28、s to or revision 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. EN 559 Gas welding equipment Rubber hoses for welding, cutting and allied processes E

29、N 1326 Gas welding equipment Small kits for gas brazing and welding EN ISO 4080 Rubber and plastics hoses and hose assemblies Determination of permeability to gas (ISO 4080 : 1991) EN 21746 Rubber or plastics hoses and tubing Bending tests (ISO 1746 : 1983) EN 24671 Rubber and plastics hoses and hos

30、e assemblies Methods of measurement of dimensions (ISO 4671 : 1984) EN 24672 Rubber and plastics hoses Sub-ambient temperature flexibility tests (ISO 4672 : 1988) EN 28033 Rubber and plastics hose Determination of adhesion between components (ISO 8033 : 1991) ISO 37 : 1994 Rubber, vulcanized or ther

31、moplastic Determination of tensile stress-strain properties EN 20105-A02 : 1994 Textiles Tests for colour fastness Part A02 : Grey scale for assessing change in colour ISO 176 : 1976 Plastics Determination of loss of plasticizers Activated carbon method ISO 188 : 1982 Rubber, vulcanized Accelerated

32、ageing or heat-resistance tests ISO 471 : 1983 Rubber Standard temperatures, 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 : 1

33、984 Rubber and plastics hoses and hose assemblies Hydrostatic testing ISO 11758 : 1995 Rubber and plastic hoses Exposure to a Xenon arc lamp Determination of changes in colour and appearance 3 Materials 3.1 Construction The hose shall comprise: a) an interior lining consisting of a thermoplastic com

34、position; b) reinforcement applied by any suitable method; c) an external cover consisting of a thermoplastic composition. The total wall thickness of the hose shall 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, por

35、osity and other imperfections.Page 4 EN 1327 : 1996 BSI 1996 4 Dimensions, limits of deviation and colours 4.1 Bore sizes and colours The nominal internal diameters and colours shall comply with the values given in tables 1 and 2. Table 1. Bore sizes and colours for oxy-fuel gas blowpipes and air-fu

36、el gas blowpipes Dimensions in millimetres Gases Applications Colour of cover Bore sizes for oxy-fuel gas blowpipes Bore sizes for air-fuel gas blowpipes Hydrogen 1) or other combustible gases excluding acetylene 3, 2 and 4 red LPG 2) or MPS 3) 3, 2 and 4 3, 2; 4; 5 orange Oxygen 4) 3, 2 and 4 blue

37、1) The manufacturer shall be consulted for compatibility of the hose to hydrogen application. 2) Liquified petroleum gases. 3) Methylacetylene-propadiene-mixtures. 4) Also for air/oxygen mixtures with an additional oxygen content of more than 20 %. Table 2. Bore sizes and colours for arc welding app

38、lications Dimensions in millimetres Gases Arc welding applications (shielding gas) bore sizes Colour of cover Other non-combustible gases and gas mixtures except oxygen 1) 3, 2; 4; 5; 6, 3; 8; 10 black 1) e.g. mixtures argon/CO 2 . 4.2 Tolerances and concentricity The concentricity of the hose measu

39、red according to EN 24671 shall be in accordance with the values given in table 3. Table 3. Tolerances and concentricity Dimensions in millimetres Nominal bore Tolerance Concentricity 3,2 0,40 1,0 max. 4 0,40 1,0 max. 5 0,40 1,0 max. 6,3 0,40 1,0 max. 8 0,50 1,25 max. 10 0,50 1,25 max. 4.3 Cut lengt

40、hs and limits of deviation The limits of deviation for cut lengths shall be in accordance with ISO 1307. 5 Physical properties of lining and cover 5.1 Tensile strength and elongation at break The thermoplastics used in the lining and cover shall, when tested in accordance with ISO 37, have a tensile

41、 strength and elongation at break not less than the values given in table 4. Table 4. Tensile strength and elongation at break Rating Tensile strength Elongation at break N/mm 2 % Lining $ 5 $ 200 Cover $ 7 $ 250 5.2 Accelerated ageing After ageing for 7 days at a temperature of 70 C as described in

42、 ISO 188 the tensile strength and elongation at break respectively of the lining and cover shall not decrease by more than 25 % and 50 % from the values given in table 4. 5.3 Non-ignition requirement for oxygen hoses When tested by the method described in annex C, three samples of the lining shall r

43、emain in the apparatus at a constant temperature of 180 C to 185 C for 2 min without ignition. The sample can change in shape, but shall not run and stay impaled on the sample holder. If more than one of the samples show evidence of ignition in less than 2 min, the hose shall be considered as not in

44、 compliance. If only one sample shows evidence of ignition in less than 2 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 2 min, the hose shall be deemed as not in compliance.Page 5 EN 1327 : 1996 BSI

45、1996 1) Liquified petroleum gases 2) Methylacetylene-propadiene-mixtures 3) C for 80 mm for bore sizes 3,2 mm to 6,3 mm; C for 90 mm for bore size 8 mm; C for 100 mm for bore size 10 mm. 5.4 Resistance to liquids (resistance to n-pentane for LPG 1) and MPS 2) hoses) A sample of the hose lining, when

46、 tested according to annex A, shall show n-pentane absorbed not exceeding 15 % and n-pentane extractable matter not exceeding 10 %. 5.5 Loss in mass on heating When tested in accordance with ISO 176, method B, materials of the lining and cover shall not have a loss in mass greater than 4 %. 6 Perfor

47、mance requirements 6.1 Hydrostatic requirements The hose, when tested in accordance with ISO 1402, shall meet the requirements of table 5. Table 5. Hydrostatic requirements Rating in MPa (bar) 1) in MPa (bar) 1) Maximum design working pressure 1,0 (10) 2,0 (20) Proof pressure 2,0 (20) 4,0 (40) Minim

48、um burst pressure 3,0 (30) 6,0 (60) Rating in % in % Change in length at maximum design working pressure 5 5 Change in diameter at maximum design working pressure 10 10 1) The values are given at 23 C. 6.2 Adhesion When tested in accordance with EN 28033 using the type 2 or type 4 test piece the min

49、imum adhesion between adjacent components shall be 1,5 kN/m. 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 ten times the nominal bore (with a minimum of 80 mm 3) ), and a coefficient of deformation (K) 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 method B of EN 24672