Description

Pipeline steel pipes are pressure-bearing steel pipes specifically designed for transporting fluids such as oil, natural gas, and water. Their core characteristics are high strength, high toughness, good weldability, and corrosion resistance.

Pipeline steel pipes are mainly divided into seamless steel pipes and welded steel pipes (straight seam/spiral welded pipes), conforming to API SPEC 5L or GB/T 9711 standards, with steel grades such as X42–X120 (yield strength 290–830 MPa).

Pipeline Steel Pipe Material Grades:

API SPEC 5L-2011 (Specification for Line Pipe), compiled and published by the American Petroleum Institute, is commonly used around the world. The main material of the pipe is L245, L290, L360, L415, L480, GR.B, X42 steel pipe, X46, X52 steel tubes, X56, X65 steel pipes, X70 steel tube, X80, X100 and other steel grades

Applications of Pipeline Steel Pipe:

Pipeline steel pipes are primarily used for long-distance transportation of fluids such as oil, natural gas, and water, and are widely applied in oil and gas trunk lines, branch lines, urban gas pipeline networks, and some industrial fluid transportation systems.

1. Energy Transportation: Pipeline steel pipes are a core material for oil and gas field gathering and transportation, and inter-regional long-distance pipelines (such as the “West-East Gas Pipeline” and the “China-Russia East Route”), transporting crude oil, natural gas, associated gas, and hydrogen-blended media.

2. Public Utilities: Pipeline steel pipes are used in urban gas distribution, water supply and drainage trunk lines, and heating networks (some corrosion-resistant or insulated pipelines).

3. Special Environment Applications: High-grade steel pipes (such as X65, X70, and X80) are suitable for harsh conditions such as deep sea, polar regions, permafrost, and acidic gas fields, requiring high strength, high toughness, and corrosion resistance (such as resistance to HIC/SSCC).

4. Industrial fluids: Pipeline steel pipes are used in chemical, power, and coal slurry transportation scenarios to transport non-corrosive or corrosion-resistant media (excluding special pipes such as high-pressure boiler tubes and oil well casings).

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	–