LSAW Offshore / Structure Steel Pipe | RFQ Sourcing Details

: LSAW steel pipe (Longitudinally Submerged Arc Welding abbreviated is a professional expression term for LSAW steel pipe. It uses a single medium and thick plate as the raw material, and the steel plate is pressed (rolled) into a tube blank in a mold or a forming machine.

The pipe is In the construction of high strength, high toughness and high quality long-distance oil and gas pipelines, most of the steel pipes required are large-diameter thick wall straight seam submerged arc welded pipes.

According to API standards, in large oil and gas pipelines, straight seam submerged arc welding pipe is the only designated applicable pipe type when it passes through class 1 and class 2 areas such as alpine zone, seabed and densely populated urban areas.

According to the forming way, it can be divided into: UOE welded pipe : sheet steel plate at the edge of pre-bending, after U forming, O forming, internal welding, external welding, mechanical cold expanding process;JCOE welded pipe : namely according to the "J-C-O-E" pre-welding, forming, after welding through cold expanding and other processes;HME welded pipe : it is formed by mandrel rolling method according to "C-C-O", after welding, it goes through cold expanding and other processes Specification: UOE SAWL PIPES Outside Diameter:Φ508mm- 1118mm (20"- 44") Wall Thickness: 6.0-25.4mm 1/4"-1" Quality Standards: API,DNV,ISO,DEP,EN,ASTM,DIN,BS,JIS,GB,CSA Length: 9-12.3m (30'- 40') Grades: API 5L A-X90,GB/T9711 L190-L625 JCOE SAWL PIPES Outside Diameter:Φ406mm- 1626mm (16" - 64" ) Wall Thickness:6.0- 75mm (1/4" - 3" ) Quality Standards:API,DNV,ISO,DEP,EN,ASTM,DIN,BS,JIS,GB,CSA Length:3- 48 m Grades:API 5L A-X100, GB/T9711 L190-L690 Tolerance of Outside Diameter and Wall Thickness Tolerance of Outside Diameter and Wall Thickness Types Standard SY/T SY/T SY/T ASTM A252 AWWA C200-97 API 5L PSL1 Tube end OD deviation ±0.5%D ±0.5%D -0.79mm~+2.38mm 508mm, ±10.0%T T≥15.0mm, ±1.5mm Chemical Composition and Mechanical Properties Standard Grade Chemical Composition(max)% Mechanical Properties(min) C Mn Si S P Yield Strength(Mpa) Tensile Strength(Mpa) GB/T700-2006 A B 0.2 1.