송영인
2021-01-25 12:11:48
API 660 9th Para 9.5.6 관련하여 하기 사항을 API660에 Interpretation 문의 할 방법이 없어서 문의 드립니다.
API 660 9th Para 9.5.6
9.5.6 Strength-welded tube-to-tubesheet welds shall have a minimum of two weld passes and be produced by gas tungsten arc welding (GTAW) using filler material, unless otherwise specified or approved by the purchaser.
Q1) We understand the tube to tubesheet welds shall have a minimum of two weld passes.
However, Does it mean that the two passes shall be produced by GTAW only with filler condition ? (mean that non-filler condition with GTAW for the first weld pass of two weld passes is not acceptable)
Or, does it mean when filler condition is applied, filler condition shall be done only by GTAW ?
(mean that non-filler condition with GTAW for the first weld pass of two weld passes and filler condition with GTAW for the second weld pass of two passes is acceptable)
Q2) The para 9.5.6 calls Purchaser. What does the purchase mean ?
Contractor ? or Owner ?