API 5L Line pipe PSL1 / PSL2

Galvanized Steel Pipe knowledge

May 7, 2018

Steel Seamless tube DIN 1629 / 17210 For Egypt

May 15, 2018

Line pipe specification: 10.3-2032×1.7-39.7mm
　

Executive Standard: GB/T9711.1/API SPEC 5L

Uses: Used for gas, water and oil transportation in oil and natural gas industry

API SPEC 5L-2011 (Line Pipeline Specification), prepared and published by the American Petroleum Institute, is common across the world. Line pipe: It transports oil, gas or water pumped out of the ground to the oil and gas industry. The line pipe includes two kinds of seamless and welded pipe. The pipe end has a flat end, a threaded end and a socket end; the connection mode is a terminal welding, a coupling connection, a socket connection, and the like. The main material of the tube is L245, L290, L360, L418, L480, GR B, X42, X46, X56, X65, X70, X80, X100 and other steel grades.

According to the different performance requirements of GB/T9711.1 pipeline steel pipes, the tempering can be divided into the following types according to the different tempering temperatures:

low temperature tempering (150-250 degrees)

The structure obtained at low temperature tempering is tempered martensite. The purpose is to reduce the quenching internal stress and brittleness so as to avoid cracking or premature failure during use, while maintaining the high hardness and high wear resistance of the hardened steel. It is mainly used for all kinds of high-carbon cutting tools, measuring tools, GB/T9711.1 pipeline steel pipe, rolling bearings and carburizing parts. The hardness after tempering is generally HRC58-64.

Tempering at medium temperature (250-500 degrees)

The tempered troostite was obtained by tempering at medium temperature. Its purpose is to obtain high yield strength, elastic limit and higher toughness. Therefore, it is mainly used for the treatment of various GB/T9711.1 pipeline steel pipes and hot work molds. The hardness after tempering is generally HRC35-50.

high temperature tempering (500-650 degrees)

The structure obtained by high temperature tempering is tempered sorbite. The heat treatment combined with quenching and high temperature tempering is customarily called quenching and tempering. Its purpose is to obtain comprehensive mechanical properties with good strength, hardness, plasticity and toughness. Therefore, it is widely used in automobile, GB/T9711.1 pipeline steel, machine tools and other important structural parts, such as connecting rods, bolts, gears and shafts. The hardness after tempering is generally HB200-330.

Mechanical properties:

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

Line pipe chemical element table:

Roduct Level	Steel grade	Chemical composition, %
Roduct 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	–

standard:

API SPEC 5L – American Petroleum Institute Standard

GB/T9711 – China National Standard

use:

Oxygen, water and oil pipelines used in the oil and gas industry

The main production steel grade:

B, X42, X52, X60, X65, X70 L245 L290 L320 L360 L390 L450 L485

Size tolerance:

Steel pipe type	Steel pipe outside diameter (D)	Steel pipe wall thickness (S)
Body	Steel tube outside diameter (mm)	Allowable deviation (mm)	Steel tube outside diameter (mm)	Allowable deviation (mm)
≥ 60.3 and S<20	±0.75%	≤73.0	+15% ,-12.5%
≥60.3 and S≥20	±1.00%	>73.0 and S<20	+15% ,-12.5%
		>73.0 and S≥20	+17.5% ,-10

Mechanical properties:

standard	Grade	Tensile strength (MPa)	Yield (MPa)	Yield ratio	Elongation(%)	0 °C impact power Akv (J)	Heat treatment
API SPEC 5L GB/T9711	L245/B	≥415	245 to 440	≤0.80	twenty two	≥40	Normal fire
API SPEC 5L GB/T9711	L290/X42	≥415	290 to 440	≤0.80	twenty one	≥40	Normal fire
API SPEC 5L GB/T9711	L360/X52	≥460	360 to 510	≤0.85	20	≥40	Normal fire
API SPEC 5L GB/T9711	L415/X60	≥520	415 to 565	≤0.85	18	≥40	Normal fire
API SPEC 5L GB/T9711	L450/X65	≥535	450 to 570	≤ 0.90	18	≥40	Quenching + tempering
API SPEC 5L GB/T9711	L485/X70	≥570	485 to 605	≤ 0.90	18	≥40	Quenching + tempering

chemical composition:

standard	Grade	chemical composition(%)	CEV (%)
C	Si	Mn	P	S	V	Nb	Ti
API SPEC 5L GB/T9711.2	B	≤0.16	≤0.40	≤1.10	≤0.020	≤0.010	–	–	–	≤0.42
X42	≤0.17	≤0.40	≤1.20	≤0.020	≤0.010	≤ 0.05	≤ 0.05	≤0.04	≤0.42
X52	≤0.20	≤0.45	≤ 1.60	≤0.020	≤0.010	≤0.10	≤ 0.05	≤0.04	≤0.45
X60	≤0.21	≤0.45	≤ 1.60	≤0.020	≤0.010	≤0.15	≤ 0.05	≤0.04	protocol
X65	≤0.16	≤0.45	≤ 1.60	≤0.020	≤0.010	≤ 0.06	≤ 0.05	≤ 0.06	≤0.45
X70	≤0.16	≤0.45	≤1.70	≤0.020	≤0.010	≤ 0.06	≤ 0.05	≤ 0.06	≤0.45

Note:

1.0.015%≤Altot<0.06%;N≤0.012%;Al/N≥2/1;Cu≤0.25%;Ni≤0.30%;Cr≤0.30%;Mo≤0.10%

2. V+Nb+Ti≤0.15

3. X60, X65, X70 after consultation Mo ≤ 0.35%

American Petroleum Institute Standard (API SPEC 5L) Line Pipe Spec Sheet

Nominal size Nominal Size	Outer Diameter Outside Diameter	Wall thickness Wall Thickness	Flat -end Weight
Inch	Mm	Inch	Mm	Lb/ft	Kg/m
0.405	0.405	10.29	0.095	2.4	0.31	0.47
0.54	0.54	13.72	0.088	2.2	0.43	0.62
0.54	13.72	0.119	3.0	0.54	0.79
0.675	0.675	17.15	0.091	2.3	0.57	0.84
0.675	17.15	0.126	3.2	0.74	1.10
0.84	0.84	21.34	0.109	2.8	0.85	1.28
0.84	21.34	0.147	3.7	1.09	1.61
1.05	1.05	26.67	0.113	2.9	1.13	1.70
1.05	26.67	0.154	3.9	1.48	2.19
1.315	1.315	33.4	0.133	3.4	1.68	2.52
1.315	33.4	0.179	4.6	2.17	3.21
1.660	1.660	42.2	0.145	3.7	2.72	3.43
1.660	42.2	0.191	4.9	3.00	4.51
1.900	1.660	42.2	0.382	9.7	5.22	7.77
1.900	48.3	0.145	3.7	2.72	4.07
1.900	48.3	0.200	5.1	3.63	5.43
1.900	48.3	0.400	10.2	6.41	9.58
2 3/8	2.375	60.3	0.109	2.8	2.64	3.97
2.375	60.3	0.125	3.2	3.00	4.51
2.375	60.3	0.141	3.6	6.36	5.03