May I ask which types of welds require flaw detection?
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May I ask which types of welds require flaw detection? What are the standards for flaw detection?
Whether to conduct flaw detection is determined based on the properties of the medium, as well as pressure and temperature. For specific details, one can refer to standards such as GB50235, GB50236, SH3501, JB4708, and JB4709, which all provide relevant regulations
For the welds of pressure vessels, the inspection areas required vary depending on the grade of the pressure vessel. Some undergo 100% testing, while others have testing at over 20%. Some use radiation, while others use ultrasound.
Refer to GB50316/SH3501/GB5044; selection is based on medium toxicity, pressure, and temperature