Requirements for radiographic testing
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What are the requirements for radiographic inspection when the weld joint factor is defined as 0.7? If radiographic inspection is not possible, can alternative methods be used?
I don’t know what kind of device you have. I recall that a welding coefficient of 0.7 is specified in NB/T47003.1-2009 for steel welded pressure vessels; the inspection requirements vary depending on the type of welded joint.
The ASME standard has a welding factor of 0.7. I can’t help you with this; I don’t understand it either. Look for answers related to markings, etc. ~:lol
In the standard GB150, relevant provisions are listed in Article 4.5.2.
Why don’t I see chapter 4.5.2?
You can check clause 4.5.2 on GB150-2011, which deals with the welding joint coefficient; it is on page 13 of the standard. I’ll send you a screenshot
The welding coefficient of 0.7 mentioned in ASME; however, for vessels of categories A and B that contain extremely or highly hazardous toxic media, per 150.4 10.3.1 e), 100% RT or UT is required.
The coefficients and requirements should all be specified on the design drawings. .