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 and oil. The marine API line pipes are manufactured according to the standard API SPEC 5L.We are able to supply other plain-endline pipes in line with GB/T 9711 with a broad range of specifications O.D. 168.3 ~ 323.9mm and W.T. 5.2 ~ 28.83mm.

If you have any specific requirements, we are able to customize pipe sizes. For more information, please feel free to contact us.

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).

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