1、July 2010 Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 2
2、3.040.70; 25.160.30!$iJF“1703935www.din.deDDIN EN ISO 3821Gas welding equipment Rubber hoses for welding, cutting and allied processes (ISO 3821:2008)English translation of DIN EN ISO 3821:2010-07Gasschweigerte Gummischluche fr Schweien, Schneiden und verwandte Prozesse (ISO 3821:2008)Englische bers
3、etzung von DIN EN ISO 3821:2010-07Matriel de soudage aux gaz Tuyaux souples en caoutchouc pour le soudage, le coupage et les techniques connexes(ISO 3821:2008)Traduction anglaise de DIN EN ISO 3821:2010-07SupersedesDIN EN 559:2003-08www.beuth.deIn case of doubt, the German-language original shall be
4、 considered authoritative.Document comprises 23 pages07.10 DIN EN ISO 3821:2010-07 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes”, Subcommittee SC 8 “Equipment for gas welding, cutting and all
5、ied processes” in collaboration with Technical The responsible German body involved in its preparation was the Normenausschuss Schweitechnik (Welding Standards Committee), Working Committee NA 092-00-07 AA Ausrstung zum Gasschweien, Schneiden und verwandte Prozesse. The DIN Standards corresponding t
6、o the International Standards referred to in this document are as follows: ISO 1307:2006 DIN EN ISO 1307:2008-04 ISO 1402 DIN EN ISO 1402 ISO 1746 DIN EN ISO 1746 ISO 1817 DIN ISO 1817 ISO 4080 DIN EN ISO 4080 ISO 4671 DIN EN ISO 4671 ISO 4672:1997 DIN EN ISO 4672:1999-10 ISO 7326:2006 DIN EN ISO 73
7、26:2008-01 ISO 8033:2006 DIN EN ISO 8033:2006-11 ISO 8330 DIN EN ISO 8330 ISO 11114-3 DIN EN ISO 11114-3 ISO 23529 DIN ISO 23529 Amendments This standard differs from DIN EN 559:2003-08 as follows: a) The text of ISO 3821:2008 has been adopted in its entirety. b) Table 1 has been extended to include
8、 nominal sizes 4,8/7,1/9,5. c) Subclause 10.3 relating to the marking of hoses has been modified. d) Annex E (normative) “Alternative oxygen gas colour codes” has been included. Previous editions DIN 1901: 1925-04 DIN BERG 19 = DIN 20019: 1930-10 DIN 8541: 1953-07, 1965-04 DIN 8541-1: 1977-10, 1986-
9、08 DIN EN 559: 1994-09, 2003-08 DIN 8541-120: 1996-04, 1997-05 Committee CEN/TC 121 “Welding” (Secretariat: DIN, Germany). DIN EN ISO 3821:2010-07 3 National Annex NA (informative) Bibliography DIN EN ISO 1307:2008-04, Rubber and plastics hoses Hose sizes, minimum and maximum inside diameters, and t
10、olerances on cut-to-length hoses DIN EN ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testing DIN EN ISO 1746, Rubber or plastics hoses and tubing Bending tests DIN EN ISO 4080:1995-04, Rubber and plastics hoses and hose assemblies Determination of permeability to gas DIN EN IS
11、O 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of the dimensions of hoses and the lengths of hose assemblies DIN EN ISO 4672:1999-10, Rubber and plastics hoses Sub-ambient temperature flexibility tests DIN EN ISO 7326:2008-01, Rubber and plastics hoses Assessment of ozo
12、ne resistance under static conditions DIN EN ISO 8033:2006-11, Rubber and plastics hoses Determination of adhesion between components DIN EN ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary DIN EN ISO 11114-3, Transportable gas cylinders Compatibility of cylinder and valve material
13、s with gas contents Part 3: Autogenous ignition test for non-metallic materials in oxygen atmosphere DIN ISO 1817, Rubber, vulcanized Determination of the effect of liquids DIN ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods DIN EN ISO 3821:2
14、010-07 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3821 March 2010 ICS 83.140.40; 25.160.30 Supersedes EN 559:2003English Version Gas welding equipment - Rubber hoses for welding, cutting and allied processes (ISO 3821:2008) Matriel de soudage aux gaz
15、- Tuyaux souples en caoutchouc pour le soudage, le coupage et les techniques connexes (ISO 3821:2008) Gasschweigerte - Gummischluche fr Schweien, Schneiden und verwandte Prozesse (ISO 3821:2008) This European Standard was approved by CEN on 21 February 2010. CEN members are bound to comply with the
16、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 CEN Management Centre o
17、r 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 CEN Management Centre has the same status as the official ve
18、rsions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia,
19、Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for C
20、EN national Members. Ref. No. EN ISO 3821:2010: EContents Page Foreword EN ISO 3821:2010 (E) DIN EN ISO 3821:2010-07 2 .31 Scope4 2 Normative references4 3 Terms and definitions .5 4 Abbreviated terms.5 5 Application .5 6 Hose designation.5 7 Materials .6 7.1 Construction 6 7.2 Manufacture .6 8 Dime
21、nsions and tolerances6 8.1 Internal diameter6 8.2 Concentricity (total indicator reading) 7 8.3 Cut lengths and tolerances 7 9 Requirements and type tests .7 9.1 General .7 9.2 Basic requirements .7 9.3 Special requirements 9 10 Hose colour and gas identification11 10.1 General .11 10.2 Gas identifi
22、cation 11 10.3 Marking.11 Annex A (normative) Method of test for non-ignition .12 Annex B (normative) Method of test for resistance to n-pentane14 Annex C (normative) Method of test for resistance to incandescent particles and hot surfaces15 Annex D (normative) Summary of requirements and type tests
23、17 Annex E (normative) Alternative oxygen gas colour codes.18 Bibliography19 Foreword EN ISO 3821:2010 (E) DIN EN ISO 3821:2010-07 3 The text of ISO 3821:2008 has been prepared by Technical Committee ISO/TC 44 “Welding and allied This European Standard shall be given the status of a national standar
24、d, either by publication of an identical text or by endorsement, at the latest by September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent right
25、s. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 559:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: A
26、ustria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdo
27、m. Endorsement notice The text of ISO 3821:2008 has been approved by CEN as a EN ISO 3821:2010 without any modification. processes” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 3821:2010 by Technical Committee CEN/TC 121 “Welding” the secretariat of w
28、hich is held by DIN. 1 Scope This International Standard specifies requirements for rubber hoses (including twin hoses) for welding, cutting and allied processes. This International Standard specifies requirements for rubber hoses for normal duty of 2 MPa (20 bar) and light duty limited to hoses for
29、 maximum working pressure of 1 MPa (10 bar) and with bore up to and including 6,3 mm. This International Standard applies to hoses operated at temperatures 20 C to +60 C and used in: gas welding and cutting; arc welding under the protection of an inert or active gas; processes allied to welding and
30、cutting, in particular, heating, brazing, and metallization. This International Standard applies neither to thermoplastics hoses nor to hoses used for high pressure 0,15 MPa (1,5 bar) acetylene. 2 Normative references The following referenced documents are indispensable for the application of this d
31、ocument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 37, Rubber, vulcanized or thermoplastic Determination of tensile stress-strain properties ISO 188, Rubber, vulcanized or thermo
32、plastic Accelerated ageing and heat resistance tests ISO 1307:2006, Rubber and plastics hoses Hose sizes, minimum and maximum inside diameters, and tolerances on cut-to-length hoses ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testing ISO 1746, Rubber or plastics hoses and tub
33、ing Bending tests ISO 1817, Rubber, vulcanized Determination of the effect of liquids ISO 4080, Rubber and plastics hoses and hose assemblies Determination of permeability to gas ISO 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of the dimensions of hoses and the lengths
34、 of hose assemblies ISO 4672:1997, Rubber and plastics hoses Sub-ambient temperature flexibility tests ISO 7326:2006, Rubber and plastics hoses Assessment of ozone resistance under static conditions EN ISO 3821:2010 (E) DIN EN ISO 3821:2010-07 4 ISO 8033:2006, Rubber and plastics hoses Determination
35、 of adhesion between components ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary ISO 11114-3, Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 3: Autogenous ignition test in oxygen atmosphere ISO 23529, Rubber General procedures for p
36、reparing and conditioning test pieces for physical test methods 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 8330 and the following apply. 3.1 twin hose two normal rubber hoses joined together longitudinally 3.2 universal fuel gas hose hoses which
37、 can be used for all fuel gases except fluxed fuel gas NOTE Fuel gases are listed in Table 4. 3.3 flux fuel gas hose hose suitable for fuel gas containing a flux 4 Abbreviated terms For the purposes of this document, the following abbreviations apply. LPG liquefied petroleum gases MPS methylacetylen
38、e-propadiene mixtures 5 Application Hoses shall only be used for the gas service for which they are identified (see 10.2). 6 Hose designation The hoses covered by this International Standard are designated using the following information: a) nominal bore, see Table 1; b) light or normal duty (pressu
39、re rating), see Table 3; c) colour and marking (gas service), see Table 4. EXAMPLE 1 6,3 mm, light duty. EXAMPLE 2 10 mm, normal duty. EXAMPLE 3 6,3 mm, light duty, FLUX. EN ISO 3821:2010 (E) DIN EN ISO 3821:2010-07 5 7 Materials 7.1 Construction 7.1.1 General The hose shall consist of: a) a rubber
40、lining of minimum thickness 1,5 mm; b) reinforcement applied by any suitable technique; c) a rubber cover of a minimum thickness of 1,0 mm. 7.1.2 Flux fuel gas hose The flux fuel gas hose shall consist of: a) a rubber lining with an additional inner plastic layer, which shall be of maximum thickness
41、 0,5 mm, to give a minimum total thickness of 1,5 mm; b) reinforcement applied by any suitable technique; c) a rubber cover of minimum thickness 1,0 mm. 7.1.3 Twin hose Each hose used for twin hose construction shall be as specified in 7.1.1 or 7.1.2. The two hoses shall be joined longitudinally dur
42、ing the extrusion and/or vulcanization process. They shall be capable of being separated free of damage to enable end fittings to be fitted. See 9.3.7. 7.2 Manufacture The lining and cover shall be of uniform thickness and free from holes, porosity and other defects. 8 Dimensions and tolerances 8.1
43、Internal diameter The internal diameter of the hoses shall be in accordance with the dimensions and tolerances shown in Table 1. EN ISO 3821:2010 (E) DIN EN ISO 3821:2010-07 6 Table 1 Nominal bore, internal diameter, tolerances and concentricity Nominal bore Internal diameter mm Tolerance mm Concent
44、ricity max. mm 4 4 4,8 4,8 5 5 6,3 6,3 7,1 7,1 0,40 8 8 9,5 9,5 10 10 0,50 12,5 12,5 16 16 1 20 20 25 25 0,60 32 32 1,0 1,25 40 40 50 50 1,25 1,50 NOTE 1 The tolerances and internal diameters (excluding nominal bore of 20 mm) do not comply with ISO 1307:2006, Table 1. NOTE 2 For intermediate dimensi
45、ons, numbers should be chosen from the R20 series of preferred numbers (see ISO 3) with tolerances as for the next larger internal diameter listed. 8.2 Concentricity (total indicator reading) The concentricity of the hose, measured in accordance with ISO 4671, shall be in accordance with the values
46、given in Table 1. 8.3 Cut lengths and tolerances The tolerances for cut lengths shall be in accordance with ISO 1307. 9 Requirements and type tests 9.1 General A summary of requirements and type tests with the corresponding number of samples is given in Annex D. 9.2 Basic requirements 9.2.1 Tensile
47、strength and elongation at break Measurements shall be made on test specimens cut from the hoses. The materials used in the lining and cover, when tested in accordance with ISO 37, shall have a tensile strength and elongation at break not less than the values given in Table 2. EN ISO 3821:2010 (E) D
48、IN EN ISO 3821:2010-07 7 Table 2 Tensile strength and elongation at break Rating Tensile strength MPa Elongation at break % Rubber lining 5 200 Cover 7 250 Inner plastic layer 5 120 9.2.2 Accelerating ageing Measurements shall be made on test specimens cut from the hoses. After ageing for 7 days at
49、a temperature of 70 C as specified in ISO 188 (air oven), the tensile strength and elongation at break respectively of the lining and cover shall not decrease from the original values obtained by more than 25 % for the tensile strength and 50 % for elongation at break. 9.2.3 Adhesion When tested in accordance with ISO 8033:2006 using the type 2 or type 4 test piece, the minimum adhesion between adjacent components shall be 1,5 kN/m. For flux fuel gas hoses, see 9.3.4.
