Seeking advice on welding issues
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For carbon steel test pieces, except that for the first welds of pipe butt weld test pieces and tube sheet corner joint test pieces, it is allowed to grind the joint area when changing electrodes, grinding and rework are not permitted for other weld passes； For other steel grades, except that the joint area is allowed to be ground when changing electrodes for the first and middle layers of weld passes, grinding and rework are not permitted for other weld passes. The above are the requirements for welder examinations. What factors are taken into consideration, or why are such rules established?
Altering the original state of the weld bead removes any possible surface and internal defects, making it impossible to assess the actual skill level of the welder.
The welder exam is designed to assess your skills, the quality of the work, and the shape of the welds; it’s not meant to force you to make corrections··
Maintain the original state of the weld seam to assess the welder’s actual skill level.
From the original state of the weld, one can immediately tell the welder’s skill level.
Yes, the requirements for welder exams are quite high