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1554.1 has 2 weld categories GP (general purpose) and SP ( structual purposes) . My question is why SP welds are selected for this particular application? ( 3 reasons)
G.P welds are selected for static loaded or low stressed members. S.P are selected for dynamic loaded or higher stressed members. Using s.p welds gives a higher quality assurance in the weld due to the
1. Stricter tolerances on the level of discontinuities accepted.
2. Requires greater nde
3. Weld procedures require greater extent of testing prior to being approved
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