High Quality API 5L X42 X52 Pipeline Carbon Steel Line Pipe For Transportation Service

Overview

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Application

The pipeline is used to transport the oil, steam and water drawn from the ground to the oil and gas industry enterprises through the pipeline

Main Grade

Grade for API 5L line pipe steel: Gr.B X42 X52 X60 X65 X70

Chemical Component

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 %.

Mechanical Property

Pipe Grade	Pipe Body of Seamless and Welded Pipe			Weld Seam of EW, LW, SAW, and COWPipe
	Yield Strength a Rt0.5	Tensile Strength a Rm	Elongation(on 50 mm or 2 in.)Af	Tensile Strength b Rm
	MPa (psi)	MPa (psi)	%	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).

Outside diameter, out of roundness and wall thickness

Specified Outside Diameter D (in)	Diameter Tolerance, inches d				Out-of-Roundness Tolerance in
	Pipe except the end a		Pipe end a,b,c		Pipe except the End a	Pipe End a,b,c
	SMLS Pipe	Welded Pipe	SMLS Pipe	Welded Pipe
< 2.375	-0.031 to + 0.016		–  0.031 to + 0.016		0.048	0.036
≥2.375 to 6.625					0.020D for	0.015D for
	+/- 0.0075D		–  0.016 to + 0.063		D/t≤75	D/t≤75
					By agreement for	By agreement for
>6.625 to 24.000	+/- 0.0075D	+/- 0.0075D, but max of 0.125	+/- 0.005D, but max of 0.063		0.020D	0.015D
>24 to 56	+/- 0.01D	+/- 0.005D but max of 0.160	+/- 0.079	+/- 0.063	0.015D for but max of 0.060	0.01D for but max of 0.500
					For	For
					D/t≤75	D/t≤75
					By agreement	By agreement
					for	for
					D/t≤75	D/t≤75
>56	As agreed
a.        The pipe end includes a length of 4 in ate each of the pipe extremities
b.        For SMLS pipe the tolerance apply for t≤0.984in and the tolerances for the thicker pipe shall be as agreed
c.         For expanded pipe with D≥8.625in and for non-expanded pipe, the diameter tolerance and the out-of-roundness tolerance may be determined using the calculated inside diameter or measured inside diameter rather than the specified OD.
d.       For determining compliance to diameter tolerance, the pipe diameter is defined as the circumference of the pipe in any circumferential plane divide by Pi.

 

Wall thickness	Tolerances a
t inches	inches
SMLS pipe b
≤ 0.157	-1.2
>         0.157 to < 0.948	+ 0.150t / – 0.125t
≥ 0.984	+ 0.146 or + 0.1t, whichever is the greater
	– 0.120 or – 0.1t, whichever is the greater
Welded pipe c,d
≤ 0.197	+/- 0.020
> 0.197 to < 0.591	+/- 0.1t
≥ 0.591	+/- 0.060
a.        If the purchase order specifies a minus tolerance for wall thickness smaller than the applicable value given in this table, the plus tolerance for wall thickness shall be increased by an amount sufficient to maintain the applicable tolerance range.
b.        For pipe with D≥ 14.000 in and t≥0.984in, the wall thickness tolerance locally may exceed the plus tolerance for wall thickness by an additional 0.05t provided that the plus tolerance for mass is not exceeded.
c.         The plus tolerance for wall thickens does not apply to the weld area
d.       See the full API5L spec for full details

Tolerance

Test Requirement

Hydrostatic test

Pipe to withstand a hydrostatic test without leakage through the weld seam or the pipe body. Jointers need not be hydrostatic tested provide the pipe sections used were successfully tested.

Bend test

No cracks shall occur in any portion of the test piece and no opening of the weld shall occur.

Flattening test

Acceptance criteria for flattening test shall be:

• EW pipes D<12.750 in:
• X60 with T 500in. There shall be no opening of the weld before the distance between the plates is less than 66% of the original outside diameter. For all grades and wall, 50%.
• For pipe with a D/t > 10, there shall be no opening of the weld before the distance between the plates is less than 30% of the original outside diameter.
• For other sizes refer to the full API 5L specification.

CVN impact test for PSL2

Many PSL2 pipe sizes and grades require CVN. Seamless pipe is to be tested in the body. Welded pipe is to be tested in the body, pipe weld and heat-affected zone. Refer to the full API 5L specification for the chart of sizes and grades and required absorbed energy values.