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BS EN ISO 3821:2019:2021 Edition

BS EN ISO 3821:2019:2021 Edition

$142.49

Gas welding equipment. Rubber hoses for welding, cutting and allied processes

Published By Publication Date Number of Pages
BSI 2021 26
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This document specifies requirements for rubber hoses (including twin hoses) for welding, cutting and allied processes.

This document specifies requirements for rubber hoses for normal duty of 2Ƃ MPa (20Ƃ bar) and light duty [limited to hoses for maximum working pressure of 1Ƃ MPa (10Ƃ bar) and with bore up to and including 6,3Ƃ mm].

This document applies to hoses operated at temperatures Ć¢Ė†ā€™2 0Ƃ Ć‚Ā°C to +60Ƃ Ć‚Ā°C and used in:

  • gas welding and cutting;

  • arc welding under the protection of an inert or active gas;

  • processes allied to welding and cutting, in particular, heating, brazing, and metallization.

This document does not specify requirements for hose assemblies; these are detailed in ISOƂ 8207.

This document applies neither to thermoplastics hoses nor to hoses used for high pressure [>0,15Ƃ MPa (>1,5Ƃ bar)] acetylene.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
7 Foreword
9 1 Scope
2 Normative references
10 3 Terms and definitions
4 Abbreviated terms
5 Application
6 Hose designation
11 7 Materials
7.1 Construction
7.1.1 Light and normal duty hoses
7.1.2 Flux fuel gas hose
7.1.3 Twin hose
7.2 Manufacture
8 Dimensions and tolerances
8.1 Inside diameters
12 8.2 Outside diameters
8.3 Wall thickness
13 8.4 Concentricity (total indicator reading)
8.5 Cut lengths and tolerances
8.6 Disclosure of inside diameter and outside diameter
9 Requirements and type tests
9.1 General
9.2 Basic requirements
9.2.1 Tensile strength and elongation at break
9.2.2 Accelerated ageing
9.2.3 Adhesion
14 9.2.4 Hydrostatic requirements
9.2.5 Flexibility at ambient temperature
9.2.6 Low-temperature flexibility
9.2.7 Protection against incandescent particles and hot surfaces
9.2.8 Ozone resistance
9.3 Special requirements
9.3.1 Non-ignition requirement for oxygen hoses
15 9.3.2 Resistance to acetone and dimethylformamide for acetylene hoses
9.3.3 Resistance to n-pentane for propane hoses
9.3.4 Resistance to azeotrope of trimethylborate with methanol for flux fuel gas hoses
16 9.3.5 Flexibility of flux fuel gas hoses
9.3.6 Permeability to LPG, MPS, and natural gas of methane hoses, universal fuel gas hoses, and flux fuel gas hoses
9.3.7 Requirements for twin hoses
9.3.8 Requirements for universal fuel gas hose
10 Hose colour and gas identification
10.1 General
10.2 Gas identification
17 10.3 Marking
18 Annex A (normative) Method of test for non-ignition
20 Annex B (normative) Method of test for resistance to n-pentane
21 Annex C (normative) Method of test for resistance to incandescent particles and hot surfaces
23 Annex D (normative) Summary of requirements and type tests
24 Annex E (normative) Alternative oxygen gas colour codes
25 Bibliography

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BS EN ISO 3821:2019
$142.49