Line Pipe

Line Pipe, API 5L Seamless Line Pipe, API 5L Welded Steel Line Pipe (ERW/LSAW/SSAW)

API 5L line pipe is an internationally recognized standard for steel pipes used in oil and gas industry pipeline transportation systems, encompassing both seamless and welded pipes. These products are widely used in onshore and offshore long-distance oil and gas pipelines, urban gas pipeline networks, and industrial slurry transportation.

Standard: API Spec 5L PLS1/ PSL2

Chinese Standard: GB/T 9711
Certifications: API Monogram, ISO 9001, CE (CPR), ISO 3834 (Welding System)

Application:

For gas, water, transportation in Petroleum and natural gas industries

Advantages:
● High strength and excellent low-temperature toughness
● Good weldability and corrosion resistance
● Meets the requirements of acidic service environments (HIC/SSCC)
● Specifications cover both PSL1 and PSL2 product specification levels

Product Classification

Classification Method	Type	Features	Applicable Scenarios
By Manufacturing Process	Seamless Steel Pipe (SMLS)	No weld seam, high pressure resistance	Small diameter, high-pressure branch line
	Straight Seam Submerged Arc Welded Pipe (ERW/LSAW)	Straight weld seam, high dimensional accuracy	High-pressure trunk line, marine pipeline
	Spiral Submerged Arc Welded Pipe (SSAW)	Spiral weld seam, high production efficiency	Large diameter trunk line, low-pressure transportation
By Quality Grade	PSL1	Conventional quality requirements	General transportation environment
	PSL2	More stringent chemical, mechanical, and non-destructive testing requirements	Acidic environment, high pressure, low temperature, marine and other harsh conditions

Size Specifications Range:

Parameters	Seamless Steel Pipe	Straight Seam Submerged Arc Welded Pipe	Spiral Seam Submerged Arc Welded Pipe
Outer Diameter (OD)	60.3mm ~ 762mm	406mm ~ 1422mm	219mm ~ 3048mm
Wall Thickness (WT)	3.0mm ~ 60mm	6.0mm ~ 75mm	4.0mm ~ 25.4mm
Single Length	6m ~ 12m (fixed length)	6m ~ 18.3m	6m ~ 18.3m

Special Customization: Special sizes, end beveling, anti-corrosion coatings, etc., can be provided according to project requirements.

Tolerance on Dimensions:

Standard	Out Diameter		Wall Thickness
API 5L	Tolerance		Tolerance
	D<60.3	+0.41mm, -0.80mm	+15.0%, -12.5%
	D≥60.3	+0.75%D, -0.75%D	+15.0%, -12.5%

Material Grades and Mechanical Properties:

Standard	Grade	Chemical Components (%)					Mechanical Properties
		C	Si	Mn	P	S	Tensile STrength(Mpa)	Yield STrength(Mpa)
API 5L PSL1	A	0.22	-	0.90	0.030	0.030	≥331	≥207
	B	0.28	-	1.20	0.030	0.030	≥414	≥241
	X42	0.28	-	1.30	0.030	0.030	≥414	≥290
	X46	0.28	-	1.40	0.030	0.030	≥434	≥317
	X52	0.28	-	1.40	0.030	0.030	≥455	≥359
	X56	0.28	-	1.40	0.030	0.030	≥490	≥386
	X60	0.28	-	1.40	0.030	0.030	≥517	≥448
	X65	0.28	-	1.40	0.030	0.030	≥531	≥448
	X70	0.28	-	1.40	0.030	0.030	≥565	≥483
API 5L PSL2	B	0.24	-	1.20	0.025	0.015	≥414	≥241
	X42	0.24	-	1.30	0.025	0.015	≥414	≥290
	X46	0.24	-	1.40	0.025	0.015	≥434	≥317
	X52	0.24	-	1.40	0.025	0.015	≥455	≥359
	X56	0.24	-	1.40	0.025	0.015	≥490	≥386
	X60	0.24	-	1.40	0.025	0.015	≥517	≥414
	X65	0.24	-	1.40	0.025	0.015	≥531	≥448
	X70	0.24	-	1.40	0.025	0.015	≥565	≥483
	X80	0.24	-	1.40	0.025	0.015	≥621	≥552