API Spec 5L steel plate

API Spec 5L steel plate is generally refers to the standards of pipeline steel, include pipeline pipe and pipeline steel plate. According to manufacture method, pipeline steel pipes are produced into seamless pipe and welded steel pipe, commonly used pipeline line types are welded steel tube with spiral submerged arc welding pipe (SSAW), straight seam submerged arc welding pipe (LSAW), electric resistance welding (ERW), seamless steel pipe is usually chosen where pipe diameter is less than 152 mm. API Spec 5L steel plate GR. B, X42, X46 and X52, X56, X60, X70 and X80 steel mills and factories have developed steel grade for X100 and X120 measures of pipeline steel. Steel pipe of higher steel grade, relatively have higher requirement of raw materials and production, the carbon equivalent between different grade of steel is strictly controlled.

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Steel Properties

API Spec 5L steel plate chemical composition(%):

API Spec 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 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

API Spec 5L steel plate mechanical properties:

Standard	Steel Grade	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

API Spec 5L steel plate equivalent grades:

Material	EN 10208-2	DIN 17172	API 5L
1.0457	L 245NB	StE 240.7	Gr. B
1.0484	L 290NB	StE 290.7	X 42
1.0582	L 360NB	StE 360.7	X 52
1.8972	L 415NB	StE 415.7	X 60
1.0418	L 245MB	StE 240.7 TM	Gr. B
1.0429	L 290MB	StE 290.7 TM	X 42
1.0578	L 360MB	StE 360.7 TM	X 52
1.8973	L 415MB	StE 415.7 TM	X 60
1.8975	L 450MB	StE 445.7 TM	X 65
1.8977	L 485MB	StE 480.7 TM	X 70

Application

API Spec 5L steel plate application:
API Spec 5L specifies the manufacture of two product levels (PSL1 and PSL2). PSL refers to product specification level made for API 5L standard. Pipe specification level is divided into PSL1 and PSL2 for line pipe standard, line pipes of PSL1 and PSL2 have different levels of quality requirement. API Spec 5L pipeline steel plate is used to for manufacturing pipeline steel pipes in extract oil, steam, water on the ground to the oil and gas industries.

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