Standard
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AS/NZS 1335:2020
[Current]Gas welding equipment — Rubber hoses for welding, cutting and allied processes
This 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:
(a) Gas welding and cutting.
(b) Arc welding under the protection of an inert or active gas.
(c) 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.
Published: 15/05/2020
Pages: 17
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
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
9.3.4.1 Adhesion after conditioning in trimethylborate-methanol azeotrope
9.3.4.2 Tensile strength and elongation at break after conditioning in trimethylborate-methanol azeotrope
9.3.4.3 Change in mass and volume after immersion in trimethylborate-methanol azeotrope
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
9.3.7.1 General
9.3.7.2 Separation test for twin hose
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
A.1 Apparatus
A.1.1
A.1.2
A.1.3
A.1.4
A.1.5
A.2 Procedure
Annex B
B.1
B.2
B.3
Annex C
Annex D
Annex E
Bibliography
Cited references in this standard
[Current]
Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties
[Current]
Rubber - General procedures for preparing and conditioning test pieces for physical test methods
[Current]
Gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 3: Autogenous ignition test for non-metallic materials in oxygen atmosphere
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