Description

API 5L X42 Steel Pipe is a standard for pipeline steel developed by the American Petroleum Institute (API), representing a medium-strength pipeline steel. API 5L X42 Steel Pipe is available in both seamless steel tube and welded steel pipe varieties. The “42” in “X42” indicates the steel’s minimum yield strength of 42 gigapascals (MPa). API 5L X42 Steel Pipe is typically manufactured using hot rolling or cold bending processes. It exhibits excellent mechanical properties and formability, making it suitable for use in pipeline systems transporting various gases and liquids.

API 5L X42 Steel Pipe offers numerous significant advantages. It is a high-strength, low-alloy steel pipe with a yield strength of 420 MPa, capable of easily withstanding harsh environments such as high pressure and high temperature. Manufactured using a straight seam welding process, it achieves high production efficiency and maximizes material utilization. Its surface is smooth and defect-free, and its beveled ends facilitate installation and connection.

API 5L X42 Steel Pipe is widely used in oil and gas pipelines, refineries, chemical plants, and other fields. In oil and gas transportation, it ensures safe and stable energy delivery. In refineries and chemical plants, it can transport corrosive media such as sulfuric acid and hydrochloric acid, demonstrating strong adaptability and reliability.

In practical applications, API 5L X42 Steel Pipe is combined with 3LPE polyethylene anti-corrosion technology to achieve perfect complementary performance. The high strength and excellent weldability of API 5L X42 Steel Pipe provide a solid foundation for energy transportation, while the excellent protection of the 3LPE anti-corrosion layer effectively resists environmental corrosion, reducing pipeline maintenance costs and the risk of failure.

Applications of API 5L X42 Steel Pipe:

API 5L X42 Steel Pipe is primarily used for medium- and low-pressure long-distance transmission pipelines of fluids such as oil, natural gas, and water. It is suitable for onshore trunk lines, gathering and transmission networks, and some urban gas or industrial pipeline systems.

1. Oil and Gas Transmission: API 5L X42 Steel Pipe is widely used in onshore medium- and high-pressure (typical operating pressure 6.3–10 MPa) transmission pipelines for crude oil, natural gas, and refined oil products, such as branch lines and pipelines in Class II and III areas. It is also used in some shale gas gathering and transmission projects or projects in cold regions (due to its good low-temperature toughness).

2. Water and Industrial Fluid Transmission: API 5L X42 Steel Pipe can be used for water supply and drainage, irrigation, chemical media (such as acid and alkali solutions, requiring corrosion protection), and urban gas distribution networks.

3. Structure and Special Uses: API 5L X42 Steel Pipe is used for non-pressure structure support (such as piling pipes and bridge components), but not for the original design purpose; it is rarely used directly in scenarios such as food and beverage or offshore platforms unless it is specially treated (such as 3PE) and certified.

Specifications of Pipeline Steel Pipe:

Standard	Product Level	Steel grade	Yield Strength (min), Mpa	Tensile Strength（MPa）
API 5L GB/T9711.2	PSL 1	A or L210	210	335
		B or L245	245	415
		x42 or L290	290	415
		X46 or L320	320	435
		X52 or L360	360	460
		X56 or L390	390	490
		X60 or L415	415	520
		X70	483	565
	PSL 2	BR or L245R	245~450	415~760
		X42R or L290R	290~495	415~760
		BN or L245N	245~450	415~760
		X42N or L290N	290~495	415~760
		X46N or L320N	320~525	435~760
		X52N or L360N	360~530	460~760
		X56N or L390N	390~545	490~760
		X60N or L415N	415~565	520~760
		X65N or L450N	425~566	525~760
		X70 or L480	484~565	565~768
		X80	552~690	621~827

oduct Level	Steel grade	Chemical composition, %
oduct Level	Steel grade	C	Mn	P	S	Si	V	Nb	Ti	CEpcm
PSL 1	B or L245	≤0.28	≤1.20	≤0.030	≤0.030	–	–	–	–	–
	x42 or L290	≤0.28	≤1.30	≤0.030	≤0.030	–	–	–	–	–
	X46 or L320	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
	X52 or L360	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
	X56 or L390	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
	X60 or L415	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
	X70	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
PSL 2	BR or L245R	≤0.24	≤1.20	≤0.025	≤0.015	≤0.40	c	c	≤0.04	≤0.25
	X42R or L290R	≤0.24	≤1.20	≤0.025	≤0.015	≤0.40	≤0.06	≤0.05	≤0.04	≤0.25
	BN or L245N	≤0.24	≤1.20	≤0.025	≤0.015	≤0.40	c	c	≤0.04	≤0.25
	X42N or L290N	≤0.24	≤1.30	≤0.025	≤0.015	≤0.40	≤0.06	≤0.05	≤0.04	≤0.25
	X46N or L320N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.40	≤0.07	≤0.05	≤0.04	≤0.25
	X52N or L360N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	≤0.25
	X56N or L390N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	≤0.25
	X60N or L415N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	–
	X65N or L450N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	–
	X70N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	–
	X80	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	–