API 5L Pipe Specification - PSL1 & PSL2 - Carbon Steel Pipe Supplier

api 5l pipe-API 5L Line Pipe-carbon steel pipe supplier

What is API 5L?

API 5L steel pipe is divided into two product grades: PSL1 and PSL2.

UNIASEN is available in various grades. API 5L line pipe is suitable for oil and natural gas transportation.

We can tailor the intensity, schedule and service requirements to your specific needs.

Specification

Our pipes come in various dimensions, production procedures, steel grades, surface coatings, end types, joint methods, and machining services.

Whether you need a specific diameter, wall thickness, or coating, we have the expertise to deliver.

Our production procedures adhere to international standards, ensuring a product that aligns with your project’s demands. Trust us to provide the perfect solution for your pipeline needs.

Standard： API Spec 5L 46th 2018
Procedure： ERW, SMLS, SSAW, LSAW
Dimensions：10.3mm – 2134mm
1/8″ – 84″
1.7 – DN400
Thickness：1.7mm – 52mm
SCH5S, SCH10, SCH20, SCH30, SCH40, STD, XXS, SCH60, SCH100, SCH120, SCH140, SCH160
Unit Length: 3 – 18 mtrs
Steel Grade： API 5L Gr. B, API 5L X52, API 5L X65, API 5L X42, API 5L X56, API 5L X70, API 5L X46, API 5L X60, API 5L X80
Surface Coating： Black Lacquer, Varnishing, Oiling, Hot Dip Galvanizing
FBE, 2PP, 3PP, 2PE, 3PE
End Type： Plain, Bevelled, Threaded, Grooved, Shouldered
Joint Method： Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Pipe Machining： Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

Dimension

UNIASEN’s API 5L Pipes are available in a wide array of dimensions to suit different applications. From varying outer diameters, wall thicknesses, and lengths, we offer customization to fit your specific needs. Our dimension table includes comprehensive details, allowing you to select the perfect size and shape for your project. With UNIASEN, you have the flexibility to choose the dimensions that best align with your operational requirements, ensuring efficiency and compatibility.

Specified Outside Diameter D mm (in.)	Specified Wall Thickness t mm (in.)
Specified Outside Diameter D mm (in.)	Special Light Sizes a	Regular Sizes
≥ 10.3 (0.405) to < 13.7 (0.540)	—	≥ 1.7 (0.068) to ≤ 2.4 (0.094)
≥ 13.7 (0.540) to < 17.1 (0.675)	—	≥ 2.2 (0.088) to ≤ 3.0 (0.118)
≥ 17.1 (0.675) to < 21.3 (0.840)	—	≥ 2.3 (0.091) to ≤ 3.2 (0.125)
≥ 21.3 (0.840) to < 26.7 (1.050)	—	≥ 2.1 (0.083) to ≤ 7.5 (0.294)
≥ 26.7 (1.050) to < 33.4 (1.315)	—	≥ 2.1 (0.083) to ≤ 7.8 (0.308)
≥ 33.4 (1.315) to < 48.3 (1.900)	—	≥ 2.1 (0.083) to ≤ 10.0 (0.394)
≥ 48.3 (1.900) to < 60.3 (2.375)	—	≥ 2.1 (0.083) to ≤ 12.5 (0.492)
≥ 60.3 (2.375) to < 73.0 (2.875)	≥ 2.1 (0.083) to ≤ 3.6 (0.141)	> 3.6 (0.141) to ≤ 14.2 (0.559)
≥ 73.0 (2.875) to < 88.9 (3.500)	≥ 2.1 (0.083) to ≤ 3.6 (0.141)	> 3.6 (0.141) to ≤ 20.0 (0.787)
≥ 88.9 (3.500) to < 101.6 (4.000)	≥ 2.1 (0.083) to ≤ 4.0 (0.156)	> 4.0 (0.156) to ≤ 22.0 (0.866)
≥ 101.6 (4.000) to < 168.3 (6.625)	≥ 2.1 (0.083) to ≤ 4.0 (0.156)	> 4.0 (0.156) to ≤ 25.0 (0.984)
≥ 168.3 (6.625) to < 219.1 (8.625)	≥ 2.1 (0.083) to ≤ 4.0 (0.156)	> 4.0 (0.156) to ≤ 40.0 (1.575)
≥ 219.1 (8.625) to < 273.1 (10.750)	≥ 3.2 (0.125) to ≤ 4.0 (0.156)	> 4.0 (0.156) to ≤ 40.0 (1.575)
≥ 273.1 (10.750) to < 323.9 (12.750)	≥ 3.6 (0.141) to ≤ 5.2 (0.203)	> 5.2 (0.203) to ≤ 45.0 (1.771)
≥ 323.9 (12.750) to < 355.6 (14.000)	≥ 4.0 (0.156) to ≤ 5.6 (0.219)	> 5.6 (0.219) to ≤ 45.0 (1.771)
≥ 355.6 (14.000) to < 457 (18.000)	≥ 4.5 (0.177) to ≤ 7.1 (0.281)	> 7.1 (0.281) to ≤ 45.0 (1.771)
≥ 457 (18.000) to < 559 (22.000)	≥ 4.8 (0.188) to ≤ 7.1 (0.281)	> 7.1 (0.281) to ≤ 45.0 (1.771)
≥ 559 (22.000) to < 711 (28.000)	≥ 5.6 (0.219) to ≤ 7.1 (0.281)	> 7.1 (0.281) to ≤ 45.0 (1.771)
≥ 711 (28.000) to < 864 (34.000)	≥ 5.6 (0.219) to ≤ 7.1 (0.281)	> 7.1 (0.281) to ≤ 52.0 (2.050)
≥ 864 (34.000) to < 965 (38.000)	—	≥ 5.6 (0.219) to ≤ 52.0 (2.050)
≥ 965 (38.000) to < 1422 (56.000)	—	≥ 6.4 (0.250) to ≤ 52.0 (2.050)
≥ 1422 (56.000) to < 1829 (72.000)	—	≥ 9.5 (0.375) to ≤ 52.0 (2.050)
≥ 1829 (72.000) to < 2134 (84.000)	—	≥ 10.3 (0.406) to ≤ 52.0 (2.050)
NOTE Standardized values for specified outside diameter and specified wall thickness of pipe are given in ISO 4200 [7] and ASME B36.10M[8]
a Pipe having the combination of specified outside diameter and specified wall thickness is defined as special light size pipe; other combinations given in this table are defined as regular size pipe.

Chemical Requirement

Understanding the chemical composition of our API 5L Pipes is vital for your project’s success. At UNIASEN, we adhere to strict chemical requirements, ensuring the right balance of elements for optimal performance. Our pipes are manufactured with precise proportions of carbon, manganese, phosphorus, sulfur, and other essential elements. This meticulous attention to chemical composition guarantees a product that delivers durability, corrosion resistance, and the performance you expect from UNIASEN.

Chemical Composition for PSL 1 Pipe with t ≤ 25.0 mm (0.984 in.)

Steel Grade (Steel Name)	Mass Fraction, Based on Heat and Product Analyses a,g %
	C	Mn	P		S	V	Nb	Ti
	max b	max b	min	max	max	max	max	max
Seamless Pipe
L175 or A25	0.21	0.60	—	0.030	0.030	—	—	—
L175P or A25P	0.21	0.60	0.045	0.080	0.030	—	—	—
L210 or A	0.22	0.90	—	0.030	0.030	—	—	—
L245 or B	0.28	1.20	—	0.030	0.030	c,d	c,d	d
L290 or X42	0.28	1.30	—	0.030	0.030	d	d	d
L320 or X46	0.28	1.40	—	0.030	0.030	d	d	d
L360 or X52	0.28	1.40	—	0.030	0.030	d	d	d
L390 or X56	0.28	1.40	—	0.030	0.030	d	d	d
L415 or X60	0.28 e	1.40 e	—	0.030	0.030	f	f	f
L450 or X65	0.28 e	1.40 e	—	0.030	0.030	f	f	f
L485 or X70	0.28 e	1.40 e	—	0.030	0.030	f	f	f
Welded Pipe
L175 or A25	0.21	0.60	—	0.030	0.030	—	—	—
L175P or A25P	0.21	0.60	0.045	0.080	0.030	—	—	—
L210 or A	0.22	0.90	—	0.030	0.030	—	—	—
L245 or B	0.26	1.20	—	0.030	0.030	c,d	c,d	d
L290 or X42	0.26	1.30	—	0.030	0.030	d	d	d
L320 or X46	0.26	1.40	—	0.030	0.030	d	d	d
L360 or X52	0.26	1.40	—	0.030	0.030	d	d	d
L390 or X56	0.26	1.40	—	0.030	0.030	d	d	d
L415 or X60	0.26 e	1.40 e	—	0.030	0.030	f	f	f
L450 or X65	0.26 e	1.45 e	—	0.030	0.030	f	f	f
L485 or X70	0.26 e	1.65 e	—	0.030	0.030	f	f	f
a Cu ≤ 0.50 %; Ni ≤ 0.50 %; Cr ≤ 0.50 % and Mo ≤ 0.15 %. b For each reduction of 0.01 % below the specified maximum concentration for carbon, an increase of 0.05 % above the specified maximum concentration for Mn is permissible, up to a maximum of 1.65 % for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75 % for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00 % for Grade L485 or X70. c Unless otherwise agreed, Nb + V ≤ 0.06 %. d Nb + V + Ti ≤ 0. 15 %. e Unless otherwise agreed. f Unless otherwise agreed, Nb + V + Ti ≤ 0. 15 %. g No deliberate addition of B is permitted and the residual B ≤ 0.001 %.

Chemical Composition for PSL 2 Pipe with t ≤ 25.0 mm (0.984 in.)

Steel Grade (Steel Name)	Mass Fraction, Based on Heat and Product Analyses % max									Carbon Equivalent a % max
Steel Grade (Steel Name)	C b	Si	Mn b	P	S	V	Nb	Ti	Other	CE IIW	CE Pcm
Seamless and Welded Pipe
L245R or BR	0.24	0.40	1.20	0.025	0.015	c	c	0.04	e,l	0.43	0.25
L290R or X42R	0.24	0.40	1.20	0.025	0.015	0.06	0.05	0.04	e,l	0.43	0.25
L245N or BN	0.24	0.40	1.20	0.025	0.015	c	c	0.04	e,l	0.43	0.25
L290N or X42N	0.24	0.40	1.20	0.025	0.015	0.06	0.05	0.04	e,l	0.43	0.25
L320N or X46N	0.24	0.40	1.40	0.025	0.015	0.07	0.05	0.04	d,e,l	0.43	0.25
L360N or X52N	0.24	0.45	1.40	0.025	0.015	0.10	0.05	0.04	d,e,l	0.43	0.25
L390N or X56N	0.24	0.45	1.40	0.025	0.015	0.10 f	0.05	0.04	d,e,l	0.43	0.25
L415N or X60N	0.24 f	0.45 f	1.40 f	0.025	0.015	0.10 f	0.05 f	0.04 f	g,h,l	As agreed
L245Q or BQ	0.18	0.45	1.40	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
L290Q or X42Q	0.18	0.45	1.40	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
L320Q or X46Q	0.18	0.45	1.40	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
L360Q or X52Q	0.18	0.45	1.50	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
L390Q or X56Q	0.18	0.45	1.50	0.025	0.015	0.07	0.05	0.04	d,e,l	0.43	0.25
L415Q or X60Q	0.18 f	0.45 f	1.70 f	0.025	0.015	g	g	g	h,l	0.43	0.25
L450Q or X65Q	0.18 f	0.45 f	1.70 f	0.025	0.015	g	g	g	h,l	0.43	0.25
L485Q or X70Q	0.18 f	0.45 f	1.80 f	0.025	0.015	g	g	g	h,l	0.43	0.25
L555Q or X80Q	0.18 f	0.45 f	1.90 f	0.025	0.015	g	g	g	i,j	As agreed
L625Q or X90Q	0.16 f	0.45 f	1.90	0.02	0.010	g	g	g	j,k	As agreed
L690Q or X100Q	0.16 f	0.45 f	1.90	0.02	0.010	g	g	g	j,k	As agreed
Welded Pipe
L245M or BM	0.22	0.45	1.20	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
L290M or X42M	0.22	0.45	1.30	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
L320M or X46M	0.22	0.45	1.30	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
L360M or X52M	0.22	0.45	1.40	0.025	0.015	d	d	d	e,l	0.43	0.25
L390M or X56M	0.22	0.45	1.40	0.025	0.015	d	d	d	e,l	0.43	0.25
L415M or X60M	0.12 f	0.45 f	1.60 f	0.025	0.015	g	g	g	h,l	0.43	0.25
L450M or X65M	0.12 f	0.45 f	1.60 f	0.025	0.015	g	g	g	h,l	0.43	0.25
L485M or X70M	0.12 f	0.45 f	1.70 f	0.025	0.015	g	g	g	h,l	0.43	0.25
L555M or X80M	0.12 f	0.45 f	1.85 f	0.025	0.015	g	g	g	i,l	0.43 f	0.25
L625M or X90M	0.10	0.55 f	2.10 f	0.02	0.010	g	g	g	i,l	―	0.25
L690M or X100M	0.10	0.55 f	2.10 f	0.02	0.010	g	g	g	i,j		0.25
L830M or X120M	0.10	0.55 f	2.10 f	0.02	0.010	g	g	g	i,j		0.25
a Based on product analysis, for seamless pipe with t > 20.0 mm (0.787 in.), the CE limits shall be as agreed; the CEIIW limits apply if C > 0.12 % and the CEPcm limits apply if C ≤ 0.12 %. b For each reduction of 0.01 % below the specified maximum for C, an increase of 0.05 % above the specified maximum for Mn is permissible, up to a maximum of 1.65 % for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75 % for grades > L360 or X52, but < L485 or X70; up to a maximum of 2.00 % for grades ≥ L485 or X70, but ≤ L555 or X80; and up to a maximum of 2.20 % for grades > L555 or X80. c Unless otherwise agreed, Nb + V ≤ 0.06 %. d Nb + V + Ti ≤ 0.15 %. e Unless otherwise agreed, Cu ≤ 0.50 %; Ni ≤ 0.30 %; Cr ≤ 0.30 % and Mo ≤ 0.15 %. f Unless otherwise agreed. g Unless otherwise agreed, Nb + V + Ti ≤ 0.15 %. h Unless otherwise agreed, Cu ≤ 0.50 %; Ni ≤ 0.50 %; Cr ≤ 0.50 % and Mo ≤ 0.50 %. i Unless otherwise agreed, Cu ≤ 0.50 %; Ni ≤ 1.00 %; Cr ≤ 0.50 % and Mo ≤ 0.50 %. j B ≤ 0.004 %. k Unless otherwise agreed, Cu ≤ 0.50 %; Ni ≤ 1.00 %; Cr ≤ 0.55 % and Mo ≤ 0.80 %. l For PSL 2 pipe grades except those grades to which footnote j) already applies, the following applies: unless otherwise agreed no intentional addition of B is permitted and residual B ≤ 0.001 %.

Mechanical Requirement

Mechanical integrity is at the core of UNIASEN’s API 5L Line Pipes. We focus on key mechanical properties such as tensile strength, yield strength, elongation, and hardness to ensure our pipes withstand the demanding conditions of the pipeline industry. By choosing UNIASEN, you benefit from pipes that are engineered to perform under pressure, providing you with the confidence and reliability that your operations demand.

Pipe Grade	Pipe Body of Seamless and Welded Pipe			Weld Seam of EW, LW, SAW, and COW Pipe
	Yield Strength a Rt0.5 MPa (psi)	Tensile Strength a Rm MPa (psi)	Elongation (on 50 mm or 2 in.) Af %	Tensile Strength Rm MPa (psi)
	min	min	min	min
L175 or A25	175 (25,400)	310 (45,000)	c	310 (45,000)
L175P or A25P	175 (25,400)	310 (45,000)	c	310 (45,000)
L210 or A	210 (30,500)	335 (48,600)	c	335 (48,600)
L245 or B	245 (35,500)	415 (60,200)	c	415 (60,200)
L290 or X42	290 (42,100)	415 (60,200)	c	415 (60,200)
L320 or X46	320 (46,400)	435 (63,100)	c	435 (63,100)
L360 or X52	360 (52,200)	460 (66,700)	c	460 (66,700)
L390 or X56	390 (56,600)	490 (71,100)	c	490 (71,100)
L415 or X60	415 (60,200)	520 (75,400)	c	520 (75,400)
L450 or X65	450 (65,300)	535 (77,600)	c	535 (77,600)
L485 or X70	485 (70,300)	570 (82,700)	c	570 (82,700)
a For intermediate grades, the difference between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade. b For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a). c The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be as determined using the following equation: where C is 1940 for calculations using SI units and 625,000 for calculations using USC units; Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches), as follows:
1) for circular cross-section test pieces, 130 mm2 (0.20 in.2) for 12.7 mm (0.500 in.) and 8.9 mm (0.350 in.) diameter test pieces; 65 mm2 (0. 10 in.2) for 6.4 mm (0.250 in.) diameter test pieces; 2) for full-section test pieces, the lesser of a) 485 mm2 (0.75 in.2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in.2); 3) for strip test pieces, the lesser of a) 485 mm2 (0.75 in.2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in.2); U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch).

Table 7— Requirements for the Results of Tensile Tests for PSL 2 Pipe

Pipe Grade	Pipe Body of Seamless and Welded Pipe						Weld Seam of HFW, SAW and COW Pipe
	Yield Strength a Rt0.5 MPa (psi)		Tensile Strength a Rm MPa (psi)		Ratio a,c Rt0.5/Rm	Elongation (on 50 mm or 2 in.) Af %	Tensile Strength
	Yield Strength a Rt0.5 MPa (psi)		Tensile Strength a Rm MPa (psi)		Ratio a,c Rt0.5/Rm	Elongation (on 50 mm or 2 in.) Af %	Rm MPa (psi)
	min	max	min	max	max	min	min
L245R or BR L245N or BN L245Q or BQ L245M or BM	245 (35,500)	450 (65,300) e	415 (60,200)	655 (95,000)	0.93	f	415 (60,200)
L290R or X42R L290N or X42N L290Q or X42Q L290M or X42M	290 (42,100)	495 (71,800)	415 (60,200)	655 (95,000)	0.93	f	415 (60,200)
L320N or X46N L320Q or X46Q L320M or X46M	320 (46,400)	525 (76,100)	435 (63,100)	655 (95,000)	0.93	f	435 (63,100)
L360N or X52N L360Q or X52Q L360M or X52M	360 (52,200)	530 (76,900)	460 (66,700)	760 (110,200)	0.93	f	460 (66,700)
L390N or X56N L390Q or X56Q L390M or X56M	390 (56,600)	545 (79,000)	490 (71,100)	760 (110,200)	0.93	f	490 (71,100)
L415N or X60N L415Q or X60Q L415M or X60M	415 (60,200)	565 (81,900)	520 (75,400)	760 (110,200)	0.93	f	520 (75,400)
L450Q or X65Q L450M or X65M	450 (65,300)	600 (87,000)	535 (77,600)	760 (110,200)	0.93	f	535 (77,600)
L485Q or X70Q L485M or X70M	485 (70,300)	635 (92,100)	570 (82,700)	760 (110,200)	0.93	f	570 (82,700)
L555Q or X80Q L555M or X80M	555 (80,500)	705 (102,300)	625 (90,600)	825 (119,700)	0.93	f	625 (90,600)
L625M or X90M	625 (90,600)	775 (112,400)	695 (100,800)	915 (132,700)	0.95	f	695 (100,800)
L625Q or X90Q	625 (90,600)	775 (112,400)	695 (100,800)	915 (132,700)	0.97 g	f	―
L690M or X100M	690 (100,100) b	840 (121,800) b	760 (110,200)	990 (143,600)	0.97 h	f	760 (110,200)
L690Q or X100Q	690 (100,100) b	840 (121,800) b	760 (110,200)	990 (143,600)	0.97 h	f	―
L830M or X120M	830 (120,400) b	1050 (152,300) b	915 (132,700)	1 145 (166,100)	0.99 h	f	915 (132,700)
a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade; for intermediate grades up to Grade L320 or X46, the tensile strength shall be ≤ 655 MPa (95,000 psi); for intermediate grades greater than Grade L320 or X46 and lower than Grade L555 or X80, the tensile strength shall be ≤ 760 MPa (110,200 psi); for intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation; for SI units, the calculated value shall be rounded to the nearest 5 MPa; for USC units, the calculated value shall be rounded to the nearest 100 psi. b For grades > L625 or X90, Rp0.2 applies. c This limit applies for pipe with D > 323.9 mm (12.750 in.). d For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a). e For pipe requiring longitudinal testing, the maximum yield strength shall be ≤ 495 MPa (71,800 psi). f The specified minimum elongation, Af, shall be as determined using the following equation: where C is 1940 for calculations using SI units and 625,000 for calculations using USC units; Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches), as follows: 1) for circular cross-section test pieces, 130 mm2 (0.20 in.2) for 12.7 mm (0.500 in.) and 8.9 mm (0.350 in.) diameter test pieces; 65 mm2 (0. 10 in.2) for 6.4 mm (0.250 in.) diameter test pieces; 2) for full-section test pieces, the lesser of a) 485 mm2 (0.75 in.2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in.2); 3) for strip test pieces, the lesser of a) 485 mm2 (0.75 in.2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in.2); U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch). g Lower values of Rt0.5/Rm may be specified by agreement. h For grades > L625 or X90, Rp0.2 /Rm applies. Lower values of Rp0.2 /Rm may be specified by agreement.

Steel Grades

UNIASEN offers API 5L Line Pipes in various steel grades, including Gr. A, B, X42, X46, X52, X56, X60, X65, X70, X80. Each grade is tailored to specific applications and performance requirements. Whether you need high tensile strength or enhanced corrosion resistance, we have the right grade for you. With UNIASEN, you can select the steel grade that aligns with your project’s needs, ensuring optimal performance and longevity.

Production Tolerance

Quality is paramount at UNIASEN, and our production tolerance for API 5L Line Pipes reflects our commitment to excellence. We adhere to tight tolerances in dimensions, weight, strength, and other critical parameters. Our manufacturing process is designed to minimize variations, ensuring a consistent product that meets your exact specifications. With UNIASEN, you can trust that our API 5L Line Pipes will fit seamlessly into your operations, delivering the precision and quality you expect from a world-class supplier.

API 5L Seamless & Welded Pipe