What is ISO 3821 - Gas welding equipment about?
ISO 3821 specifies requirements for rubber hoses for normal duty of 2 MPa (20 bar) and light-duty [limited to hoses for a maximum working pressure of 1 MPa (10 bar) and with a bore up to and including 6,3 mm].
ISO 3821 does not specify requirements for hose assemblies; these are detailed in ISO 8207.
ISO 3821 applies to hoses operated at temperatures −20 °C to +60 °C and used in:
- Gas welding and cutting
- Arc welding under the protection of inert or active gas
- Processes allied to welding and cutting, in particular, heating, brazing, and metallization.
Note: ISO 3821 applies neither to thermoplastics hoses nor to hoses used for high pressure [>0,15 MPa (>1,5 bar)] acetylene.
Who is ISO 3821 - Gas welding equipment for?
ISO 3821 on gas welding equipment is useful for:
- Manufacturers of gas welding equipment
- Welders and cutters
- Metallurgists
- Welding industry
Why should you use ISO 3821 - Gas welding equipment?
Gas welding is a welding process that melts and joins metals by heating under the presence of oxygen and high temperature.
ISO 3821 provides methods and procedures for gas welding and cutting and dealing with processes allied to welding and cutting, like heating, brazing, and metallization.
ISO 3821 provides guidance on measuring the dimensions of rubber hoses and hence is structured such that the necessary level of quality is achieved, consistently maintained, and the high reliability of the product assured.
By adopting ISO 3821, manufacturers can demonstrate the reliability of their products and build trust in their use throughout the gas welding supply chain.
What’s changed since the last update?
BS EN ISO 3821:2019 supersedes BS EN ISO 3821:2008.BS EN ISO 3821:2019 includes some technical changes with respect to BS EN ISO 3821:2008. These include:
- The definition of maximum working pressure has been added
- Clauses 7 to 9 have been revised
- The requirements for marking have been revised
- Editorial changes have been made.