Certificate item code: consists of two letters and a number, and the category of special equipment is expressed as "TS6".

Operation type code: indicated by letters, and welding operation is indicated by "J".

Area code: it is expressed in three letters, that is, the letter code of the administrative division of the area where the starting place is located.

For example:

Gas shielded metal arc welding.

SMAW: covered electrode arc welding.

Extended data

Welding and hot cutting operations:

Suitable for gas welding, gas cutting, covered electrode arc welding, carbon arc gouging, submerged arc welding, gas shielded welding, plasma arc welding, electroslag welding, electron beam welding, laser welding, oxygen flux cutting, laser cutting, plasma cutting and other operations.

Pressure welding operation:

Suitable for resistance welding, gas pressure welding, explosive welding, friction welding, cold pressure welding, ultrasonic welding, forging welding and other operations.

Brazing operation:

Suitable for flame brazing, resistance brazing and induction brazing.

Welder mount guard operation certificate:

Immersion welding and furnace welding, excluding soldering iron welding.

Baidu encyclopedia-welder certificate