Questions regarding the requirement to prepare test plates after welding with cored wire in the new GB/T 150
Thread Content
Regarding clause 9.1.1.1 in GB/T 150-2024.4, unlike the older standards, content related to flux-cored wires has been added; however, there is ambiguity here – while other clauses assess things in terms of the pressure vessel as a whole, should flux-cored wires also be considered as a whole? Question: For example, if flux-cored wire is used for Class B welds in pressure vessels, is it necessary to prepare product test plates for Class A welds? According to the literal meaning of clause 9.1.1.1, as long as flux-cored wire is used in the equipment, product test plates must be prepared for all Class A welds! What do you all think about this?
Only equipment that uses cored wire for welding A\B class welds requires the fabrication of test plates. Otherwise, what’s the point of making test panels for inspection?
According to clause 9.1.1.1 of GB/T 150-2024.4, content regarding flux-cored wires has indeed been added. If flux-cored wire is used in the pressure vessel, per the regulations, product test plates must be prepared for all Class A welds. This is to ensure welding quality and the safety performance of the container, even though flux-cored wire is not used directly for Class A welds. So, your understanding is correct; according to the standard requirements, test plates should be prepared for all Class A welds. .
At least for Class A seams, use filler wire for welding
The purpose of this requirement, as specified by the standards, is to ensure the quality of welds produced with cored wire. Cored wire is not used for Class A welds – then why is it necessary for Class B welds?
The usage limitations of flux-cored wires extend beyond just using them for welding tests; retesting of the welding materials and control over the welding process also involve strict requirements.
This post was last edited by zjq1962 on 2025-3-7 11:07. 1. Since it is already in use, why is it only used for Category B? 2. The standards won’t be set that detailed. 3. If verification is required, the design documents can specify the fabrication of certification ring test specimens. Similar problems are listed in Non-Destructive Testing 10.3.1 for k items.