The American Petroleum Institute specification API 5L covers seamless and welded steel line pipe. This is steel pipe for pipeline transportation systems in the petroleum and natural gas industries. API 5L is suitable for conveying gas, water, and oil. Size range is limited only by manufacturer’s capabilities.
Outer Diameter: 21mm-610mm (1/2″-24″)
Wall Thickness: 2mm-40mm
End:square ends (straight cut,saw cut,and torch cut).or beveled for welding, beveled,
Surface: Lightly oiled,Black painted, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy,Fusion Bond Epoxy, 3-layers PE)
Nominal Pipe Size 2″ to 24″ O.D.
Wall Thickness – Schedule 10 through 160, STD, XS, XXS.
Standard API 5L
Product Specification Level PSL-2
Steel grade X52
Chemical Properties %
API 5L PSL-1 X52 API 5L PSL-2 X52
Tensile strength, min /max, psi (MPa) 66,700(460)/ n/a 66,700 / 110,200
Yield strength, min /max, psi (MPa) 52,000 (300)/n/a 52,000 / 76,900
Fluid transportation steel pipe- preferred in long pipelines due to inexpensiveness
Pipeline steel – resistance to crack propogation
Line Pipe / Sour Service Line Pipes