Generally required materials include business license, enterprise manager's certificate, technical director's professional title certificate, accounting professional title certificate, relevant technical personnel's education certificate, professional title certificate, ID card, pension insurance payment certificate, etc. The original documents must be checked. The number of personnel varies according to the qualification level, and the minimum qualification may exceed 20. We also need some relevant safety production documents, and that's almost all.

Qualification standard for water heating and electricity service subcontracting:

L, the registered capital of the enterprise is more than 300,000 yuan.

2, the enterprise has the corresponding professional assistant engineer or technical director.

3, the enterprise has more than junior plumbing, electrician and pipeline technology workers not less than 30 people, among them, middle and senior workers not less than 50%; Employment rate of business operators with certificates 100%.

4. The enterprise has machines and tools suitable for the subcontracting scope.