Introduction to API 5L PSL1/PSL2 line pipe

Apr 08, 2024

API 5L line pipe steel grade: GR. B, X42, X46 and X52, X56, X60, X70

API 5L generally refers to the standard for pipeline steel, including pipeline steel pipes and pipeline steel plates. Pipeline steel pipes are pipelines used to transport oil, steam, and water from the ground to oil and natural gas industrial enterprises. According to the manufacturing method, pipeline steel pipes are divided into seamless pipes and welded steel pipes. Commonly used types of pipeline steel pipes include spiral submerged arc welded pipes (SSAW), straight seam submerged arc welded pipes (LSAW), resistance welding and other welded steel pipes. (ERW), seamless steel pipes are usually used when the pipe diameter is less than 152 mm.

API 5L PSL1/PSL2 Chemical Composition:

Standard	Grade	Chemical Composition (%)
API 5L PSL1	Grade	C	Mn	P	S
	B	≤0.28	≤1.20	≤0.030	≤0.030
	X42	≤0.28	≤1.30	≤0.030	≤0.030
	X46	≤0.28	≤1.40	≤0.030	≤0.030
	X52	≤0.28	≤1.40	≤0.030	≤0.030
API 5L PSL2	B	≤0.24	≤1.20	≤0.025	≤0.015
	X42	≤0.24	≤1.30	≤0.025	≤0.015
	X46	≤0.24	≤1.40	≤0.025	≤0.015
	X52	≤0.24	≤1.40	≤0.025	≤0.015

API 5L PSL1/PSL2 Mechanical Property:

Standard	Steel Grade	Yield Strength(MPa)	Tensile Strength(MPa)
API 5L Line Pipe	PSL1 Physical Properties
	A25	172	310
	A	207	331
	B	241	414
	X42	290	414
	X46	317	434
	X52	359	455
	X56	386	490
	X60	414	517
	X65	448	531
	X70	483	565
	PSL2 Physical Properties
		241-448	414-758
	B	290-496	414-758
	X42	317-524	434-758
	X46	359-531	455-758
	X52	386-544	490-758
	X56	414-565	517-758
	X60	448-600	531-758
	X65	483-621	565-758
	X70	552-690	621-827

API 5L Line Pipe Dimensions:

API 5L Line Pipe Dimensions	OD(mm)		Wall Thickness(mm)
Pipes Body	OD(mm)	Allowable Tolerance(mm)	OD(mm)	Allowable Tolerance (mm)
	≥60.3, S＜20	±0.75%	≤73.0	+15%, -12.5%
	≥60.3, S≥20	±1.00%	＞73.0, S＜20	+15%, -12.5%
	/	/	＞73.0, S≥20	+17.5%, -10%