Marine API Line Pipes

Marine API Line Pipes

Marine API line pipes are a sort of marine steel pipes certified by leading classification societies. They are applied to convey gas, water, oil. The marine API line pipes are manufactured according to the standard API SPEC 5L. In addition the above-mentioned pipes, we are able to supply other line pipes in line with GB/T 9711. We provide you a broad range of specifications: O.D. 168.3 ~ 323.9mm, W.T. 5.2 ~ 28.83mm. These pipes are plain-end. Of course, if you have any specific requirements, we are able to customize pipes for you. We are engaged in providing best quality products with reasonable price for our customers. If you trust us, we will build a pleasant cooperative relationship!

Chemical Composition %

Adopted Standard	Steel Grade	C	Si	Mn	P	S	V		Nb		Ti		Other		CE_Ⅱw		CE_pcm
		Max	Max	Max	Max	Max	Max		Max		Max				Max		Max
API SPEC 5L	PSL1
	A	0.22	-	0.90	0.030	0.030	-		-		-
	B	0.28	-	1.20	0.030	0.030	a,b		a,b		b
	X42	0.28	-	1.30	0.030	0.030	b		b		b
	X46 X52	0.28	-	1.40	0.030	0.030	b		b		b
	PSL2
	BR BN	0.24	0.40	1.20	0.025	0.015	a	a		0.04		c		0.43		0.25
	X42R X42N	0.24	0.40	1.20	0.025	0.015	0.06		0.06		0.04		c		0.43		0.25
	X46N	0.24	0.40	1.40	0.025	0.015	0.05		0.05		0.04		b,c		0.43		0.25
	X52N	0.24	0.45	1.40	0.025	0.015	0.07		0.07		0.04		b,c		0.43		0.25
Note	A.Unless otherwise agreed, the sum of the niobium and vanadium contests shall be ≤0.06%. B.The sum of the niobium, vanadium and titanium concentrations shall be ≤0.25%. C.Unless otherwise agrees, 0.05% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium and 0.15% maximum for molybdenum.

Mechanical Properties

Adopted Standard	Steel Grade		Yield Strength			Tensile Strength		Elongation %
			MPa			MPa
API SPEC 5L	PSL1
	A		≥210			≥335		See table 6 and 7 of API SPEC 5L
	B		≥245			≥415
	X42		≥290			≥415
	X46		≥320			≥435
	X52		≥360			≥460
	PSL1=2
		Min.		Max.	Min.		Max.
	BR BN	245		450	415		760
	X42R X42N	290		495	415		760
	X46N	320		525	435		760
	X52N	360		530	460		760
Note	For pipes required longitudinal testing, the maximum yield strength shall be ≤495MPa(71800psi).

Marine API Line Pipes