API 5L Grade X42 Carbon Steel Seamless Pipes & Tubes

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Update time : 2026-04-07 08:48:03

　　The American Petroleum Institute specification API 5L covers seamless and welded steel line pipe. This is steel pipe for pipeline transportation systems in the petroleum and natural gas industries. API 5L is suitable for conveying gas, water, and oil. Size range is limited only by manufacturer’s capabilities.

　　Specifications for API 5L adhere to the International Organization for Standardization ISO 3183, which standardizes pipeline transportation systems within the materials, equipment and offshore structures for petroleum, petrochemical, and natural gas industries.

　　The technical committee authoring the standards recognized that there are two basic Product Specifications Levels (PSL) of technical requirements and therefore developed PSL 1 and PSL 2. PSL 1 is a standard quality for line pipe where PSL 2 contains additional chemical, mechanical properties, and testing requirements.

　　Grades covered by this specification are A25 ,A ,B (and the following “X” Grades), X42, X46, X52, X56, X60, X65, X70, X80. The two digit number following the “X” indicates the Minimum Yield Strength (in 000’s psi) of pipe produced to this grade.

Steel Standard	Steel Grade	chemical composition				API 5L mechanical property
Steel Standard	Steel Grade	C	Mn	P	S	yield strength/Mpa	Tensile Strength/Mpa	Elongation %
API SPECY5L	A	0.21	0.6	0.03	0.03	207	331	0
	B	0.22	1.2	0.025	0.015	241	414
	X42	0.22	0.025	0.015	1.3	290	414
	X46	0.22	1.4	0.025	0.015	317	434
	X52	0.22	1.4	0.025	0.015	359	455
	X56	0.22	1.4	0.025	0.015	386	490
	X60	0.22	1.4	0.025	0.015	414	517
	X65	0.22	1.45	0.025	0.015	448	531
	X70	0.22	1.65	0.025	0.015	483	565
GB/T9711-1997	L175	0.21	0.6	0.03	0.03	175	315	27
	L210	0.21	0.9	0.03	0.03	210	335	25
	L245	0.26	1.15	0.03	0.03	245	415	21
	L290	0.28	1.25	0.03	0.03	290	415	21
	L360	0.3	1.25	0.03	0.03	360	460	19
	L390	0.26	1.35	0.03	0.03	390	490	18
	L415	0.26	1.35	0.03	0.03	415	520	17
	L450	0.26	1.4	0.03	0.03	450	525	17
	L485	0.23	1.6	0.03	0.03	485	570	16
SY/T5037-2000	Q235B	0.12-0.20	0.30-0.70	0.045	0.045	235	375-460	26

　　The API 5l specification establishes requirements for two product specification levels (PSL1 and PSL2). These two PSL designations define different levels of standard technical requirements. PSL 2 has mandatory requirements for carbon equivalent, notch toughness, maximum yield strength and maximum tensile strength. The PSL designation has to be defined by the customer at the time of order placement.

　　API 5L Carbon Steel Seamless Pipes & Tubes This specification covers seamless and welded steel line pipe. It includes standard-weight and extra-strong threaded line pipe. It includes standard-weight and extra-strong threaded line pipe; and standard-weight plain-end, regular-weight plain-end, special plain-end, extra-strong plain-end, special plain-end, extra-strong plain-end pipe; as as well as bell and spigot and through-the-flow line(TFL) pipe. The purpose of this specification is to provide standards for pipe suitable for use in conveying gas, water, and oil in both the oil and natural gas industries.

　　Sizes (Seamless): 1/2″ NB – 60″ NB Sizes (ERW): 1/2″ NB – 24″ NB Sizes (SAW): 16″ NB – 100″ NB

　　Wall Thickness: Schedule 10 through 160, STD, XS, XXS.
　　The purpose of API 5L Pipe is to provide standards for pipe suitable for use in conveying gas, water, and oil in both the oil and natural gas industries. Shengtian Group applies this specification to both seamless and welded steel line pipe. Shengtian Group supplies pipes with plain-ends, with ends suitable for threading as well as pipe with ends prepared for use with special couplings.

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