ASME Code, Section VIII, Division 1, has recently changed the requirements for NDE to permit spot RT of girth welds (Category B welds) when full RT is required for longitudinal welds (Category A welds) for design with a joint efficiency of 1.0. The justification is that the maximum stress transverse to a girth weld is nominally one-half that in a longitudinal weld. ASME Code, Section VIII, Division 2, does not allow relaxation of the RT coverage of girth welds. The Company inspector should verify that the fabricator is conforming to the requirement in the specifications for full coverage RT.
All other NDE requirements for girth welds are the same as those discussed for longitudinal welds (see Section 652).
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