AS/NZS 1335:2020
Gas welding equipment - Rubber hoses for welding, cutting and allied processes
Standard adopts ISO 3821:2019, which 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 2 MPa (20 bar) and light duty [limited to hoses for maximum working pressure of 1 MPa (10 bar) and with bore up to and including 6.3 mm]. This document applies to hoses operated at temperatures -20 °C to +60 °C and used in the following: 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. This document applies neither to thermoplastics hoses nor to hoses used for high pressure [>0.15 MPa (>1.5 bar)] acetylene. The standard is identical with, and has been reproduced from ISO 3821:2019 Gas welding equipment- Rubber hoses for welding, cutting and allied processes.
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AS/NZS 1335:2020 Rubber hoses for welding, cutting and allied processes
Preface
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms
5 Application
6 Hose designation
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
8.2 Outside diameters
8.3 Wall thickness
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
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
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
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
10.3 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
Annex D (normative) Summary of requirements and type tests
Annex E (normative) Alternative oxygen gas colour codes
Bibliography
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AS/NZS 1335:2020 Rubber hoses for welding, cutting and allied processes
Preface
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms
5 Application
6 Hose designation
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
8.2 Outside diameters
8.3 Wall thickness
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
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
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
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
10.3 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
Annex D (normative) Summary of requirements and type tests
Annex E (normative) Alternative oxygen gas colour codes
Bibliography
AS/NZS 1335:2020
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