API 1104 - Apendix B API 1104 - Apendix B Ruscitto (Petroleum) (OP) 28 Feb 15 17:53 A qualified with API 1104 Appendix B (B.2) welder, welding would be qualified according 6.1, I manteniedo the same essential variables, the only difference is the warm (not essential variable) RE: API 1104 - Apendix B Ruscitto (Petroleum) (OP) 17 Mar 15 22:09 [b]A welder is qualified to Appendix B (Paragraph 6.2 and B.2) according to API 1104 code, This qualified the welder to weld according to paragraph 6.2 keeping all essential variables for the same welder? RE: API 1104 - Apendix B SectionIX (Petroleum) 18 Mar 15 10:17 Ruscitto, You question is somewhat unclear, but you appear to be on the right track. Per API 1104, Appendix B, 20th edition, a welder who has an existing multiple qualification to 6.3 and an in-service qualification to B.3 should be qualified as an in-service welder for all positions, all diameters, and all wall thicknesses within the limits of the essential variables in 6.3. Be aware that this requirement changes a bit when PHMSA adopts the 21st edition of API 1104 as the requirements become more stringent. For now, though, and until PHMSA does adopt the 21st edition of AI 1104, your reasoning holds. RE: API 1104 - Apendix B Ruscitto (Petroleum) (OP) 18 Mar 15 21:43 Mr. I understand well that in my question if a qualified welder according API code Apenice B (paragraph 6.3) more requirements (paragraphs B.2 and B.3) is qualified to weld welding according to paragraph 6.3 that is not necessarily according Appendix B, keeping the same essential variables? Please meaning "PHMSA"