Valve welding inspection progress
Feb 06 , 2023
Valve welding inspection
Valve welding inspection is generally divided into two parts:
1) Document review:
◆WPS, PQR, welder qualification WPQ are required.
◆Whether the WPS provided covers important variables such as base metal, welding consumables, welding method, groove form, thickness, preheating, and post-weld heat treatment required by the order.
◆WPS evaluated according to ASME Volume IX and NB/T47014 has corresponding regulations on important variables. Changes in important variables necessitate reassessment.
2) On-site welding inspection
◆Usually VT (visual inspection) is used to check whether there are obvious welding defects, such as cracks, undercuts, weld bumps, poor molding, burn-through, spatter, etc.
◆For surfacing welding on the sealing surface, PT is usually used to check whether there are cracks, and the hardness of the sealing surface needs to be tested;
◆Check the inlaid welding between the valve seat and the valve body, basically as long as the appearance is flat, without undercut, misalignment and welding tumor.
◆Check structural welding such as extension pipes, when required by the order, RT or UT is required to check the internal quality.
IPv6 network supported 