What is the difference between welder's intermediate mechanic certificate and special operation certificate?

The special operation certificate only shows that you have received special operation training and mastered the skills and knowledge of fire prevention and explosion prevention in welding operation.

The welder's intermediate mechanic certificate shows that your skills have reached the requirements of intermediate workers.

Practically speaking, the special operation permit is the premise of entering the construction site, and many places need to be checked and confirmed.

The welder's intermediate mechanic certificate is a bullshit thing. Professional welding requires medium and high pressure pressure vessel certificate and special material certificate (advanced materials such as copper, aluminum, P9 1). The only thing that is not needed is the certificate of intermediate mechanic or senior mechanic.