Full API 5L / ISO 3183 specification data: seamless, ERW, LSAW and SSAW line pipe dimensions
(OD, wall, weight), grade properties for all PSL1 and PSL2 grades B through X120, chemistry
composition and tensile requirements. Data per API 5L 46th edition.
API 5L / ISO 3183 governs line pipe for oil, gas, and water transmission pipelines. PSL1 covers grades L175/A25 through L485/X70. PSL2 extends to L830/X120 with mandatory carbon equivalent limits, Charpy toughness, and full-length NDE.
Use these tables to find OD, wall thickness, weight per metre, and grade mechanical and chemistry properties for seamless, ERW, LSAW, and SSAW pipe.
Looking for the full pipe schedule chart? This page shows dimensions for API 5L line pipe production. For the complete ASME B36.10M reference table covering all standard pipe schedules across all NPS sizes, see ASME B36.10M Pipe Schedule Chart →
Table data verified 2026-07-01 — API 5L 46th Edition.
Showing 33 of 33 sizes
API 5L Seamless Line Pipe Dimensions — OD, Wall Thickness, Weight and ID for NPS ½–24 (API 5L 46th Edition)
OD (in)
OD (mm)
Wall (mm)
Weight (kg/m)
Weight (lb/ft)
ID (mm)
1/2"
21.3
2.77
1.27
0.85
15.8
3/4"
26.7
2.87
1.69
1.13
21.0
1"
33.4
3.38
2.50
1.68
26.6
1-1/4"
42.2
3.56
3.39
2.28
35.1
1-1/2"
48.3
3.68
4.05
2.72
40.9
2"
60.3
3.91
5.44
3.65
52.5
2-1/2"
73
5.16
8.62
5.79
62.7
3"
88.9
5.49
11.29
7.58
77.9
3-1/2"
101.6
5.74
13.57
9.11
90.1
4"
114.3
6.02
16.07
10.79
102.3
4"
114.3
7.92
20.78
13.95
98.5
5"
141.3
6.55
21.77
14.63
128.2
5"
141.3
9.52
30.94
20.80
122.3
6"
168.3
7.11
28.26
18.97
154.1
6"
168.3
10.97
42.56
28.57
146.4
8"
219.1
8.18
42.55
28.57
202.7
8"
219.1
12.70
64.64
43.39
193.7
10"
273.1
9.27
60.29
40.48
254.5
10"
273.1
12.70
81.55
54.76
247.7
12"
323.9
9.53
73.84
49.57
304.8
12"
323.9
12.70
97.44
65.42
298.5
14"
355.6
9.53
81.33
54.60
336.5
14"
355.6
12.70
107.39
72.11
330.2
16"
406.4
9.53
93.27
62.62
387.4
16"
406.4
12.70
123.30
82.81
381.0
18"
457.2
9.53
105.16
70.63
438.2
18"
457.2
12.70
139.17
93.45
431.8
20"
508
9.53
117.05
78.60
489.0
20"
508
12.70
155.13
104.15
482.6
22"
558.8
9.53
128.94
86.61
539.8
22"
558.8
12.70
171.09
114.87
533.4
24"
609.6
9.53
140.83
94.55
590.6
24"
609.6
12.70
187.05
125.58
584.2
No results match your filter.
Source: API 5L / ISO 3183. Seamless pipe OD range ½″–24″. Wall thickness shown is one representative value per OD — multiple walls available. Contact ZC to confirm specific wall/grade/PSL combinations.
Use our interactive design pressure and wall thickness calculator for API 5L line pipe.
API 5L Welded Line Pipe Dimensions — ERW, LSAW and SSAW OD, Wall Thickness and Weight (API 5L 46th Edition)
Type
OD (in)
OD (mm)
Wall (mm)
Weight (kg/m)
Weight (lb/ft)
Grade Range
ERW
2"
60.3
3.91
5.44
3.65
B, X42–X65
ERW
3"
88.9
5.49
11.29
7.58
B, X42–X65
ERW
4"
114.3
6.02
16.07
10.79
B, X42–X65
ERW
6"
168.3
7.11
28.26
18.97
B, X42–X65
ERW
8"
219.1
8.18
42.55
28.57
B, X42–X65
ERW
10"
273.1
9.27
60.29
40.48
B, X42–X65
ERW
12"
323.9
9.53
73.84
49.57
B, X42–X65
ERW
14"
355.6
9.53
81.33
54.60
B, X42–X65
ERW
16"
406.4
9.53
93.27
62.62
B, X42–X65
ERW
18"
457.2
9.53
105.16
70.63
B, X42–X65
ERW
20"
508
9.53
117.05
78.60
B, X42–X65
ERW
24"
609.6
9.53
140.83
94.55
B, X42–X65
LSAW
16"
406.4
9.53
93.27
62.62
Gr. B–X80
LSAW
16"
406.4
12.70
123.30
82.81
Gr. B–X80
LSAW
16"
406.4
15.88
153.05
102.76
Gr. B–X80
LSAW
18"
457.2
9.53
105.16
70.63
Gr. B–X80
LSAW
18"
457.2
12.70
139.17
93.45
Gr. B–X80
LSAW
18"
457.2
19.05
206.32
138.54
Gr. B–X80
LSAW
20"
508
9.53
117.05
78.60
Gr. B–X80
LSAW
20"
508
12.70
155.13
104.15
Gr. B–X80
LSAW
20"
508
19.05
230.32
154.72
Gr. B–X80
LSAW
24"
609.6
9.53
140.83
94.55
Gr. B–X80
LSAW
24"
609.6
12.70
187.05
125.58
Gr. B–X80
LSAW
24"
609.6
19.05
278.43
187.00
Gr. B–X80
LSAW
28"
711.2
12.70
218.97
147.06
Gr. B–X80
LSAW
28"
711.2
19.05
325.79
218.83
Gr. B–X80
LSAW
30"
762
12.70
234.89
157.76
Gr. B–X80
LSAW
30"
762
19.05
349.79
234.97
Gr. B–X80
LSAW
32"
812.8
12.70
250.81
168.47
Gr. B–X80
LSAW
32"
812.8
19.05
373.78
251.10
Gr. B–X80
LSAW
36"
914.4
12.70
282.65
189.76
Gr. B–X80
LSAW
36"
914.4
19.05
421.77
283.27
Gr. B–X80
LSAW
42"
1066.8
12.70
330.41
221.91
Gr. B–X80
LSAW
42"
1066.8
19.05
493.75
331.63
Gr. B–X80
LSAW
48"
1219.2
12.70
378.17
254.02
Gr. B–X80
LSAW
48"
1219.2
19.05
565.73
379.93
Gr. B–X80
SSAW
16"
406.4
7.92
78.01
52.41
Gr. B–X70
SSAW
20"
508
7.92
97.90
65.74
Gr. B–X70
SSAW
24"
609.6
9.53
140.83
94.55
Gr. B–X70
SSAW
30"
762
9.53
176.77
118.74
Gr. B–X70
SSAW
36"
914.4
9.53
212.71
142.88
Gr. B–X70
SSAW
42"
1066.8
9.53
248.65
167.03
Gr. B–X70
SSAW
48"
1219.2
9.53
284.59
191.18
Gr. B–X70
SSAW
60"
1524
9.53
356.47
239.44
Gr. B–X65
No results match your filter.
ERW: up to 24″ OD. LSAW: 16″–60″ OD, wall up to 50mm. SSAW: 16″–120″ OD. Multiple wall thicknesses available per OD — representative values shown. Contact ZC for specific combinations.
API 5L PSL2 Mechanical Properties — Yield, Max Yield, Tensile, Y/T Ratio and Delivery Condition for Grades B through X120 (API 5L 46th Edition, Table 9)
Grade
Min Yield (MPa)
Max Yield (MPa)
Min Tensile (MPa)
Max Tensile (MPa)
Max Y/T Ratio
Delivery Conditions
L245 / B
245
450
415
655
0.93
R, N, Q, M
L290 / X42
290
495
415
655
0.93
R, N, Q, M
L320 / X46
320
525
435
655
0.93
N, Q, M
L360 / X52
360
530
460
760
0.93
N, Q, M
L390 / X56
390
545
490
760
0.93
N, Q, M
L415 / X60
415
565
520
760
0.93
N, Q, M
L450 / X65
450
600
535
760
0.93
Q, M
L485 / X70
485
635
570
760
0.93
Q, M
L555 / X80
555
705
625
825
0.93
Q, M
L625 / X90
625*
775
695
915
0.95 (M) / 0.97 (Q)
Q, M
L690 / X100
690*
840
760
990
0.97
Q, M
L830 / X120
830*
1050
915
1145
0.99
M
* Rp0.2 used in place of Rt0.5
Y/T ratio applies when D > 323.9 mm (12.750 in).
API 5L PSL1 Mechanical Properties — Minimum Yield and Tensile Strength for Grades B through X120 (API 5L 46th Edition, Table 7)
Grade
Min Yield (MPa)
Min Yield (psi)
Min Tensile (MPa)
Min Tensile (psi)
Weld Seam Min Tensile (MPa)
L175 / A25
175
25400
310
45000
310
L175P / A25P
175
25400
310
45000
310
L210 / A
210
30500
335
48600
335
L245 / B
245
35500
415
60200
415
L290 / X42
290
42100
415
60200
415
L320 / X46
320
46400
435
63100
435
L360 / X52
360
52200
460
66700
460
L390 / X56
390
56600
490
71100
490
L415 / X60
415
60200
520
75400
520
L450 / X65
450
65300
535
77600
535
L485 / X70
485
70300
570
82700
570
API 5L PSL2 Chemical Composition — C, Si, Mn, P, S, V, Nb, Ti, CE_IIW and CE_Pcm by Grade Variant (API 5L 46th Edition, Table 5)
Variant
C max
Si max
Mn max
P max
S max
V max
Nb max
Ti max
CE IIW
CE Pcm
L245R / BR
0.24
0.4
1.2
0.025
0.015
—
—
0.04
0.43
0.25
L245N / BN
0.24
0.4
1.2
0.025
0.015
—
—
0.04
0.43
0.25
L245Q / BQ
0.18
0.45
1.4
0.025
0.015
0.05
0.05
0.04
0.43
0.25
L245M / BM
0.22
0.45
1.2
0.025
0.015
0.05
0.05
0.04
0.43
0.25
L290R / X42R
0.24
0.4
1.2
0.025
0.015
0.06
0.05
0.04
0.43
0.25
L290N / X42N
0.24
0.4
1.2
0.025
0.015
0.06
0.05
0.04
0.43
0.25
L290Q / X42Q
0.18
0.45
1.4
0.025
0.015
0.05
0.05
0.04
0.43
0.25
L290M / X42M
0.22
0.45
1.3
0.025
0.015
0.05
0.05
0.04
0.43
0.25
L320N / X46N
0.24
0.4
1.4
0.025
0.015
0.07
0.05
0.04
0.43
0.25
L320Q / X46Q
0.18
0.45
1.4
0.025
0.015
0.05
0.05
0.04
0.43
0.25
L320M / X46M
0.22
0.45
1.3
0.025
0.015
0.05
0.05
0.04
0.43
0.25
L360N / X52N
0.24
0.45
1.4
0.025
0.015
0.1
0.05
0.04
0.43
0.25
L360Q / X52Q
0.18
0.45
1.5
0.025
0.015
0.05
0.05
0.04
0.43
0.25
L360M / X52M
0.22
0.45
1.4
0.025
0.015
—
—
—
0.43
0.25
L390N / X56N
0.24
0.45
1.4
0.025
0.015
0.1
0.05
0.04
0.43
0.25
L390Q / X56Q
0.18
0.45
1.5
0.025
0.015
0.07
0.05
0.04
0.43
0.25
L390M / X56M
0.22
0.45
1.4
0.025
0.015
—
—
—
0.43
0.25
L415N / X60N
0.24
0.45
1.4
0.025
0.015
0.1
0.05
0.04
—
—
L415Q / X60Q
0.18
0.45
1.7
0.025
0.015
—
—
—
0.43
0.25
L415M / X60M
0.12
0.45
1.6
0.025
0.015
—
—
—
0.43
0.25
L450Q / X65Q
0.18
0.45
1.7
0.025
0.015
—
—
—
0.43
0.25
L450M / X65M
0.12
0.45
1.6
0.025
0.015
—
—
—
0.43
0.25
L485Q / X70Q
0.18
0.45
1.8
0.025
0.015
—
—
—
0.43
0.25
L485M / X70M
0.12
0.45
1.7
0.025
0.015
—
—
—
0.43
0.25
L555Q / X80Q
0.18
0.45
1.9
0.025
0.015
—
—
—
—
0.25
L555M / X80M
0.12
0.45
1.85
0.025
0.015
—
—
—
0.43
0.25
L625Q / X90Q
0.16
0.45
1.9
0.02
0.01
—
—
—
—
0.25
L625M / X90M
0.1
0.55
2.1
0.02
0.01
—
—
—
—
0.25
L690Q / X100Q
0.16
0.45
1.9
0.02
0.01
—
—
—
—
0.25
L690M / X100M
0.1
0.55
2.1
0.02
0.01
—
—
—
—
0.25
L830M / X120M
0.1
0.55
2.1
0.02
0.01
—
—
—
—
0.25
Nb + V + Ti ≤ 0.15% (per grade footnote)
% max unless noted. — = no individual limit specified; refer to combined-element footnote where applicable.
API 5L PSL1 Chemical Composition — Maximum C, Mn, P and S by Grade and Manufacturing Process (API 5L 46th Edition, Table 4)
Grade
Process
C max
Mn max
P max
S max
L175 / A25
Seamless
0.21
0.6
0.03
0.03
L175 / A25
Welded
0.21
0.6
0.03
0.03
L175P / A25P
Seamless
0.21
0.6
0.045 – 0.08
0.03
L175P / A25P
Welded
0.21
0.6
0.045 – 0.08
0.03
L210 / A
Seamless
0.22
0.9
0.03
0.03
L210 / A
Welded
0.22
0.9
0.03
0.03
L245 / B
Seamless
0.28
1.2
0.03
0.03
L245 / B
Welded
0.26
1.2
0.03
0.03
L290 / X42
Seamless
0.28
1.3
0.03
0.03
L290 / X42
Welded
0.26
1.3
0.03
0.03
L320 / X46
Seamless
0.28
1.4
0.03
0.03
L320 / X46
Welded
0.26
1.4
0.03
0.03
L360 / X52
Seamless
0.28
1.4
0.03
0.03
L360 / X52
Welded
0.26
1.4
0.03
0.03
L390 / X56
Seamless
0.28
1.4
0.03
0.03
L390 / X56
Welded
0.26
1.4
0.03
0.03
L415 / X60
Seamless
0.28
1.4
0.03
0.03
L415 / X60
Welded
0.26
1.4
0.03
0.03
L450 / X65
Seamless
0.28
1.4
0.03
0.03
L450 / X65
Welded
0.26
1.45
0.03
0.03
L485 / X70
Seamless
0.28
1.4
0.03
0.03
L485 / X70
Welded
0.26
1.65
0.03
0.03
Nb + V + Ti ≤ 0.15% (per grade footnote)
Nb + V ≤ 0.06% (per grade footnote)
Frequently Asked Questions
What is the minimum wall thickness for API 5L X65 pipe?
API 5L does not specify a fixed minimum wall thickness for X65 — wall thickness is specified by the purchaser based on design pressure requirements. The standard specifies a negative wall thickness tolerance of 12.5% of the nominal wall. For a nominal wall of 12.7mm, the minimum acceptable wall is 12.7 × 0.875 = 11.1mm. PSL2 has tighter tolerances than PSL1.
What is the difference between API 5L PSL1 and PSL2?
PSL1 is the baseline product specification level with standard chemical, mechanical, and dimensional requirements. PSL2 adds controlled maximum yield strength, yield-to-tensile ratio limits, carbon equivalent limits, mandatory Charpy impact testing, full-length non-destructive examination, and tighter dimensional tolerances. PSL2 is required for gas service, sour service, and offshore applications.
What does the suffix letter mean in API 5L grade designations?
The suffix letter in PSL2 API 5L grades indicates the delivery condition (heat treatment): N = normalised or normalised rolled, Q = quenched and tempered, M = thermomechanical rolled, R = as-rolled (limited to certain grades). For sour service, add S after the condition letter: X65QS = X65, quenched and tempered, sour service qualified.
What is the minimum yield strength of API 5L Grade X65?
For API 5L Grade X65 PSL2, the minimum specified minimum yield strength (SMYS) is 448 MPa (65,000 psi), the maximum yield strength is 600 MPa, and the minimum ultimate tensile strength (UTS) is 531 MPa (77,000 psi). The yield-to-tensile ratio must not exceed 0.93 for PSL2. These tighter maximum property limits compared to PSL1 ensure predictable behaviour under operating loads and resist strain concentration during pigging and field bending operations.
What end finish options are available for API 5L line pipe?
API 5L line pipe is available with four end finishes: plain end (PE) — square-cut with no threads; bevelled end (BE) — 30° bevel for field girth welding, the standard for gas transmission pipelines; threaded-and-coupled (T&C) — API 5L line pipe thread, used for small-diameter gathering lines; and special end finish as agreed between purchaser and manufacturer. Bevelled-end pipe is specified for the vast majority of onshore and offshore transmission pipelines to enable automatic or manual arc welding per ASME B31.8 or DNV-ST-F101.
What is the carbon equivalent limit for API 5L PSL2?
API 5L PSL2 imposes a maximum carbon equivalent (CEIIW) per the IIW formula: CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. For Grade X65 PSL2, maximum CEIIW is 0.43% (seamless) or 0.43% (welded, when C > 0.12%). PSL2 also limits the Pcm parameter for grades with C ≤ 0.12%: Pcm = C + Si/30 + (Mn+Cu+Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B. These limits ensure weldability in field conditions and resistance to hydrogen-induced cracking (HIC) in sour environments when the 'S' qualifier is also specified.
