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API Spec 5L Steel Pipe

API Spec 5L is an international standard that specifies the manufacturing requirements for two product specification grades (PSL 1 and PSL 2) of seamless and welded steel pipes used in pipeline transportation systems in the oil and gas industry.

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API Spec 5L Steel Pipe Description

API-5L welded spiral steel pipe is made of hot-rolled strip or steel plate as raw material. The strip or steel plate is rolled into a round or special-shaped steel pipe by a forming machine, and then the formed steel pipe is butt welded by a high-frequency welding unit. PSL1 and PSL2 pipelines have different levels of quality requirements. This kind of steel pipe has the advantages of high strength, high toughness, corrosion resistance, and easy welding. API Spec 5L steel pipes are commonly used to manufacture pipeline steel pipes in the oil and gas industry.

Product Parameters

Product Name	API Spec 5L Steel Pipe
Standard	EN/DIN/JIS/ASTM/BS/ASME/AISI etc.
Outer Diameter	Seamless: 1/4"-36"	Welding: 21.3mm-3620mm
	Round Tube: 1/2"-10"	Square Tube/Rectangular Tube: 15x15mm-400x600mm
Wall Thickness	Seamless: 1.25mm-50mm	Welding: 1.65mm-65mm
Length	3-12 meters, Support customization
Surface Process	Bright, Polished, Black
Other Services	Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

Chemical Composition

API Spec 5L PSL1	Brand	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 Spec 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

Mechanical Properties

Standard	Brand	Yield Strength(MPa)	Tensile Strength(MPa)
API Spec 5L PSL1	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
API Spec 5L PSL2	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

Scope of Application

API Spec 5L specifies the manufacture of two product levels (PSL1 and PSL2). PSL refers to the product specification level established for the API 5L standard. Piping specification classes are classified into PSL1 and PSL2. For pipeline standards, PSL1 and PSL2 pipelines have different levels of quality requirements. API Spec 5L pipeline steel plate is used to manufacture pipeline steel pipes that extract oil, steam, and water on the ground in the oil and gas industry.

Materials No.	European Standard EN 10208-2	German Standard DIN 17172	API 5L
1.0457	L 245NB	You are 240.7	Gr.B
1.0484	L 290NB	You are 290.7	X42
1.0582	L 360NB	StE 360.7	X52
1.8972	L 415NB	You are 415.7	X60
1.0418	L 245MB	You are 240.7 TM	Gr.B
1.0429	L 290MB	You are 290.7 TM	X42
1.0578	L 360MB	You are 360.7 TM	X52
1.8973	L 415MB	You are 415.7 TM	X60
1.8975	L 450MB	You are 445.7 TM	X65

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