Double Sub-Arc Welded Pipe
DSAW or Double SubArc Welded Pipe is governed by the API specfication API 5L for line pipe. It is a welded pipe with a longitudinal weld seam that is welded both on the outside or outer diameter as well as the inside or inner Iiameter. This process allows these sections to be made in very large diameter light wall pipe in very long lengths.
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Steel Distributors International
Specialty Oilfield Metals
DSAW pipe has tradinally been used in "Line Pipe" or, hydrocarbon and natural gas transmission pipelines. You typically find these pipes along the ocean floor to transport product from the well to a land based refinery or processing plant. In recent years, DSAW pipe has been used for Marine Drilling Risers. The Marine Drilling Riser segment is the market that SDI supports with DSAW pipe from JFE Steel Works in Japan.