ISO 3821:1998 PDF

This International Standard specifies requirements for rubber hoses (including twin hoses) for welding, cutting and allied processes. The term “allied processes” means, in particular, heating, brazing and metallization.

This International Standard specifies requirements for rubber hoses for normal duty up to 2 MPa (20 bar) and light duty [limited to hoses for maximum working pressure up to 1 MPa (10 bar) and with nominal bore less than or equal to 6,3].

This International Standard pertains to hoses operated at temperatures − 20 °C to + 60 °C.

Plastic hoses are excluded from this International Standard.

Different colours and markings are specified for identification of the gas.

This International Standard applies to hoses used in:

• gas welding and cutting;
• arc welding under the protection of an inert or active gas;
• processes allied to welding and cutting.

This International Standard does not apply to hoses used for high pressure acetylene [more than 0,15 MPa (1,5 bar)].