API 5L Grade B Pipe

SSM supplies API 5L grade b seamless and welded carbon steel pipe

API 5L Grade B Seamless & Welded Pipes Manufacturer

SSM offers API 5L Grade B seamless and welded steel pipes designed for the oil and gas industry, ensuring excellent chemical composition and mechanical properties to meet specific application requirements.

Grade: API 5L Grade B Pipe
Manufacturing type: Seamless, ERW, LSAW, SSAW/HSAW
Outer Diameters: 1/2” – 60”
Thickness: SCH 20, SCH 40, SCH STD, SCH 80 to SCH 160
Range of Length: SRL, DRL, 20FT, 40FT, 5 – 12 meter
Product Specification Level: PSL1, PSL2
Ends: Plain, Beveled
Coatings: FBE, 3PE/3LPE, Black Painting, Varnished

API 5L Grade B Pipe Data Sheet

PSL	Delivery condition	Pipe grade/steel grade 【1】,【2】
PLS 1	As-rolled,normalizing rolled,thermomechanical rolled,thermomechanical formed,normalizing formed,normalized,normalized and tempered;or,if agreed,quenched and tempered for SMLS pipe only	L245 or B
PSL 2	As-rolled	L245R or BR
	Normalizing rolled,normalizing formed,normalized or normalized and tempered	L245N or BN
	Quenched and tempered	L245Q or BQ
	Thermomechanical rolled or thermomechanical formed	L245M or BM

【1】For intermediate grades, the steel grade shall be in one of the following formats:

The letter L followed by the specified minimum yield strength in MPa and, for PSL 2 pipe, the letter describing the delivery condition (R, N, Q or M) consistent with the above formats.
The letter X followed by a two or three digit number equal to the specified minimum yield strength in 1000 psi rounded down to the nearest integer and, for PSL 2 pipe, the letter describing the delivery condition (R, N, Q or M) consistent with the above formats.

【2】The suffix (R, N, Q or M) for PSL 2 grades belongs to the steel grade.

Chemical Composition & Mechanical Properties

Chemical composition for PSL 1 pipe with t ≤ 25,0 mm (0.984 in)

Steel Grade	Mass fraction, based upon heat and product analyses a, g
(Steel name)	C	Mn	P		S	V	Nb	Ti
	max. b	max. b	min.	max.	max.	max.	max.	max.
Seamless pipe
L245 or B	0.28	1.2	–	0.03	0.03	c,d	c,d	d
Welded pipe
L245 or B	0.26	1.2	–	0.03	0.03	c,d	c,d	d
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	Mass fraction, based upon heat and product analyses									Carbon equivalent a
(Steel name)	% maximum									% maximum
	C b	Si	Mn b	P	S	V	Nb	Ti	Other	CEIIW	CE Pcm
Seamless and welded pipes
L245R or BR	0.24	0.4	1.2	0.025	0.015	c	c	0.04	e,l	0.43	0.25
L245N or BN	0.24	0.4	1.2	0.025	0.015	c	c	0.04	e,l	0.43	0.25
L245Q or BQ	0.18	0.45	1.4	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
	C b	Si	Mn b	P	S	V	Nb	Ti	Other	CEIIW	CE Pcm
Welded pipe
L245M or BM	0.22	0.45	1.2	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
a Based upon 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 all 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%.

Requirements for the results of tensile tests for PSL 1 pipe

Pipe grade	Pipe body of seamless and welded pipes			Weld seam of EW, LW, SAW and COW pipes
Pipe grade	Yield strength a Rt0,5 MPa (psi) Minimum	Tensile strength a Rm MPa (psi) Minimum	Elongation (on 50 mm or 2 in) Af % Minimum	Tensile strength b Rm MPa (psi) Minimum
L175 or A25	175(25400)	310(45000)	C	310(45000)
L175P or A25P	175(25400)	310(45000)	C	310(45000)
L210 or A	210(30500)	335(48600)	C	335(48600)
L245 or B	245(35500)	415 (60200)	C	415(60200)
L290 or X42	290(42100)	415(60200)	C	415(60200)
L320 or X46	320(46400)	435(63100)	C	435(63100)
L360 or X52	360 (52200)	460 (66700)	C	460(66700)
L390 or X56	390(56600)	490(71100)	C	490(71100)
L415 or X60	415(60200)	520(75400)	C	520(75400)
L450 or X65	450(65300)	535(77600)	C	535(77600)
L485 or X70	485(70300)	570(82700)	C	570(82700)
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 Axc is the applicable tensile test piece cross-sectional area, expressed in square millimetres (square inches), as follows: for circular cross-section test pieces, 130 mm2 (0.20 in2) for 12,7 mm (0.500 in) and 8,9 mm (0.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6,4 mm (0.250 in) diameter test pieces; for full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) 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 in2); for strip test pieces, the lesser of a) 485 mm2 (0.75 in2) 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 in2); U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch).

Requirements for the results of tensile tests for PSL 2 pipe

Pipe grade	Pipe body of seamless and welded pipes						Weld seam of EW, LW, SAW and COW pipes
	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 b Rm MPa (psi)
	Minimum	Maximum	Minimum	Maximum	Maximum	Minimum	Minimum
L245R or BR L245N or BN L245Q or BQ L245M or BM	245 (35500)	450e (65300)e	415 (60200)	655(95000)	0,93	f	415 (60200)
L290R or X42R L290N orX42N L290Q or X42Q L290M or X42M	290 (42100)	495 (71800)	415 (60200)	655(95000)	0,93	f	415 (60200)
L320N or X46N L320Q or X46Q L320M or X46M	320 (46400)	525 (76100)	435 (63100)	655(95000)	0,93	f	435 (63100)
L360N or X52N L360Q or X52Q L360M or X52M	360 (52200)	530 (76900)	460 (66700)	760 (110200)	0,93	f	460 (66700)
L390N or X56N L390Q or X56Q L390M or X56M	390 (56600)	545 (79000)	490 (71100)	760 (110200)	0,93	f	490 (71100)
L415N or X60N L415Q or X60Q L415M or X60M	415 (60200)	565 (81900)	520 (75400)	760 (110200)	0,93	f	520 (75400)
L450Q or X65Q L450M or X65M	450 (65300)	600 (87000)	535 (77600)	760 (110200)	0,93	f	535 (77600)
L485Q or X70Q L485M or X70M	485 (70300)	635 (92100)	570 (82700)	760 (110200)	0,93	f	570 (82700)
L555Q or X80Q L555M or X80M	555 (80500)	705 (102300)	625 (90600)	825 (119700)	0,93	f	625 (90600)
L625M or X90M	625 (90600)	775 (112400)	695 (100800)	915 (132700)	0,95	f	695 (100800)
L625Q or X90Q	625 (90600)	775 (112400)	695 (100800)	915 (132700)	0,97	f	–
L690M or X100M	690 b (100100)b	840b (121800)b	760 (110200)	990 (143600)	0,97h	f	760 (110200)
L690Q or X100Q	690 b (100100)b	840 b (121800)b	760 (110200)	990 (143600)	0,97h	f	–
L830M or X120M	830 b (120400)b	1050 b (152300)b	915 (132700)	1145 (166100)	0,99 h	f	915 (132700)
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 intermediategrades 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, thecalculated 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 1 940 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 millimetres (square inches), as follows: — for circular cross-section test pieces, 130 mm2 (0.20 in2) for 12,7 mm (0.500 in) and 8,9 mm (0.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6,4 mm (0.250 in) diameter test pieces; — for full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) 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 in2); — for strip test pieces, the lesser of a) 485 mm2 (0.75 in2) 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 in2); 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.

Advantages and Disadvantages of API 5L Grade B Pipes

Advantages:
API 5L Grade B pipe is less expensive while providing adequate performance for many applications. Its good weldability allows for easy installation and maintenance. Carbon steel in Grade B pipe offers moderate corrosion resistance when protected by a coating or lining.

Disadvantages:
The pipe may not perform optimally in very high-temperature environments and may experience thermal degradation over long-term use. Carbon steel pipes are susceptible to rust without proper coating or maintenance. API 5L Grade B pipe has a lower tensile strength than higher grade pipes (e.g., X42, X52), which may limit its use in specific high-pressure applications. These pipes may also be susceptible to hydrogen embrittlement in environments containing hydrogen sulfide (sour environments), requiring additional considerations and precautions.

Applications of API 5L Grade B Pipes

Comparison of ASTM A106 Grade B and API 5L Grade B Pipes

The choice between ASTM A106 and API 5L pipes depends on specific project requirements such as temperature, pressure, corrosion resistance, and mechanical properties. ASTM A106 is ideal for high-temperature applications, while API 5L is preferred for its strength, corrosion resistance, and suitability for oil and gas transmission.

Aspect	ASTM A106 Grade B	API 5L Grade B
Standard	ASTM A106/A106M	API 5L
Specification	Seamless carbon steel pipes for high-temperature service	Line pipes for oil, gas, and water transportation
Applications	Power plants, refineries, high-temperature and high-pressure environments	Oil and gas pipelines
Manufacturing Process	Seamless only	Seamless and welded (ERW, LSAW, SSAW)
Chemical Composition
– Carbon (C)	Max 0.30%	Max 0.28%
– Manganese (Mn)	0.29-1.06%	Max 1.20%
– Phosphorus (P)	Max 0.035%	Max 0.030%
– Sulfur (S)	Max 0.035%	Max 0.030%
– Silicon (Si)	Min 0.10%	Not specified
Mechanical Properties
– Tensile Strength	Min 415 MPa (60,200 psi)	Min 415 MPa (60,200 psi)
– Yield Strength	Min 240 MPa (35,000 psi)	Min 245 MPa (35,500 psi)
#NAME?	Varies, typically 30% or more	Varies, typically 23% or more
Testing & Certification	High-temperature testing, hydrostatic, and nondestructive electric tests	Extensive testing, including hydrostatic, nondestructive inspection, fracture toughness (PSL2)
Cost Consideration	Generally more expensive due to seamless production and high-temperature requirements	Can be more cost-effective, especially welded options