EN ISO 3821:2010

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms
5 Application
6 Hose designation
7 Materials
8 Dimensions and tolerances
9 Requirements and type tests
10 Hose colour and gas identification
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

ISO 3821:2008 specifies requirements for rubber hoses (including twin hoses) for welding, cutting and allied processes.ISO 3821:2008 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].ISO 3821:2008 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 cutting, in particular, heating, brazing, and metallization.ISO 3821:2008 applies neither to thermoplastics hoses nor to hoses used for high pressure [>0,15 MPa (>1,5 bar)] acetylene.