The use of LSAW：
LSAW has large diameter and wall thickness, resistance to high pressure, resistance to low  temperature and strong corrosion characteristics.When constructing high strength and  toughness, high quality oil and gas pipeline over long distances,what is required is mostly  large caliber straight double submerged arc welding joints. According to the API standard  provisions,,LSAW is the only designated for tube type when passing through the cold region,  submarine, the urban population dense area of 2 kinds, 1 region in the large oil and gas  pipeline.

Size:
LSAW, DSAW:
Outer Diameter: 219mm-1820mm
Wall Thickness: 5.0mm-50mm
Length: 6mtr-18mtr

Standard
BS:1387, EN10217:S185, S235,S235JR, S235 G2H, S275, S275JR, S355JRH, S355J2H, St12, St13, St14, St33, St37, St44, ST52,ASTM A 53,API 5L,GB/T9711: GB/T3091, SY/T5037, SY/T 5040,CJ/T 3022

 Surface: Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy,? Fusion Bond Epoxy, 3-layers PE)

Test:
Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield
strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.

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