Should overseas materials be re-inspected when used in pressure vessels?
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Whether overseas materials must be re-inspected when used in the manufacture of pressure vessels, such as 304, etc.
Please see TSG 21-2016 "Safety Technical Supervision Regulations for Stationary Pressure Vessels" 2.1.2(4)：
It's necessary. . . What is provided above is the requirements for large capacity regulations, and there are also relevant regulations in GB150.4.
Domestic manufacturing requires re-inspection, while foreign manufacturing only provides relevant certificates.
The one upstairs is different from the one on the third floor.
The third floor made it very clear. GB150 has regulations and must be done in accordance with the regulations.
In fact, the starting point of this requirement is to consider the need for trade restrictions and try to use domestic materials.
Domestic manufacturing and foreign manufacturing have different requirements.