What value should be used for the welding joint coefficient?
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For the circumferential weld of a storage tank, welding is carried out with gussets (gussets that are in close contact with the base metal along the root of the weld); the longitudinal welds are welded full-thickness with double-sided butt joints, and 100% radiographic inspection is performed. Question: 1. Should the welding joint coefficient in the technical specifications table of the design drawings be set at 1.0 or 0.9? 2. When calculating the cylinder thickness, should a welding joint factor of 1.0 or 0.9 be used?
1. 1.0； 2. 1.0
Longitudinal welds are fully penetrated with double-sided butt welding, and 100% radiographic inspection is carried out; what about circumferential welds? If it’s all 100% RT, then if you think the value is 1.0, write 1.0; but the standards may not require such a high level
The weld coefficient refers to a longitudinal welded joint; therefore, “1.0” should be indicated in the diagram.
This post was last edited by wanlirn on 2019-11-6 at 11:33. The same quality level must be maintained for the same device; this standard does not mention it, but it is necessary to do so in practice.
Weld coefficient: The ratio of weld properties to base metal properties!
The longitudinal seam and the circumferential seam are both 1.0, as is normal
For the longitudinal loop, it’s 100% RT; it is considered that setting it to 1 is sufficient