Steel pressure vessel welding procedure qualification rules
Publish Time: 2016-09-18 Origin: Site
Steel pressure vessel welding procedure qualification rules should a lot of people are not very clear, look at the following.
1, the specimen shall be made in stainless steel composite steel (including primary and stratified) preparation.
2, the assessment qualified welding process is suitable for the welding (including parent metal and weld metal thickness range, should according to the specimen thickness of cladding and grass-roots are calculated respectively.
3, the assessment qualified welding process is suitable for the welding cladding weld metal thickness range of the minimum value, for the specimen after layer thickness of the weld metal.
4, tensile and bending test were carried out, the stainless steel composite steel welded joint (including grassroots, transition of weld and stratified) should be tested, impact test inspection only part of the welded joint at the local level.
A) tensile samples should include the full thickness of cladding and grass-roots.
B) when the transition and cladding weld, important factors in the welding procedure qualification is not at the same time should take four side bend specimen;When the transition and cladding weld, important factors in the welding procedure qualification phase at the same time try to take the lateral bending specimen, can also take two back bending specimen and the surface of the two samples.Back bending test of grassroots weld metal surface by stretching.
The above is the rule of steel pressure vessel welding procedure qualification, hope can help to you.