Non-destructive surface testing
Thread Content
Single-sided welding DU4, Class D weld G2 – is surface inspection required on the inner surface of the weld (inside the equipment)? The root dimensions are very small, around 2 mm only. Could there be defects in the roots? Analyze theoretically whether it is necessary to do it
The requirements for non-destructive testing are determined based on the medium, pressure, and material used. Refer to 150.4; if it is necessary to carry out such testing, then it should be done, as even narrow welds can have defects
Whether there are defects is not predicted in this way. It is related to groove accuracy, the welder’s skill level, and so on. If it weren’t for conducting tests to check against the relevant standards and the requirements of the design documents.
If the root dimension is very small, then there are no defects, right? In that case, it’s not necessary to perform surface inspection on the inner surface (the side of the root)
Hasn’t everyone encountered this problem?