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Description

API 5L PSL1 steel pipe and API 5L PSL2 steel pipe

API 5L PSL1 and PSL2 are two specification levels that differ in terms of chemical composition and test requirements. The differences between PSL1 and PSL2 are outlined in the two tables below:

PSL GRADE

C, a

Mn a

P

S

Si

V

Nb

Ti

Other

CEIIW

CEpcm

1

0.24

1.40

0.025

0.015

0.45

0.10

0.05

0.04

b,c

.043

0.025

2

0.28

1.40

0.03

0.03

b

b

b


API 5L PSL1 steel pipe

Test Requirement API 5L PSL1 API 5L PSL2
Charpy test None required Required for all grades
Seamless NDT test Only if purchaser specifies SR4 SR4 mandatory
Certification Certificates when specified per SR15 Certificates (SR 15.1) mandatory
Traceability Traceable only until all tests are passed, unless SR15 is specified Traceable after completion of tests (SR 15.2) mandatory
Hydrostatic Test Required Required


API 5L PSL2 steel pipe

API 5L PIPE SCHEDULE CHART
DIMENSIONAL RANGE

NPS
(in)
Outside Diameter
(in)
API 5l Pipe Schedule
SCH 10 SCH 20 SCH 30 SCH STD SCH 40 SCH 60 SCH XS SCH 80 SCH 100 SCH 120 SCH 140 SCH 160 SCH XXS
Wall Thickness (in)
1/8 0.405 0.068 0.068 0.095 0.095
1/4 0.540 0.088 0.088 0.119 0.119
3/8 0.675 0.091 0.091 0.126 0.126
1/2 0.840 0.109 0.109 0.147 0.147 0.187 0.294
3/4 1.050 0.113 0.113 0.154 0.154 0.219 0.308
1 1.315 0.133 0.133 0.179 0.179 0.250 0.358
1 1/4 1.660 0.140 0.140 0.191 0.191 0.250 0.382
1 1/2 1.900 0.145 0.145 0.200 0.200 0.281 0.400
2 2.375 0.154 0.154 0.218 0.218 0.344 0.436
2 1/2 2.875 0.203 0.203 0.276 0.276 0.375 0.552
3 3.500 0.216 0.216 0.300 0.300 0.438 0.600
3 1/2 4.000 0.226 0.226 0.318 0.318
4 4.500 0.237 0.237 0.337 0.337 0.438 0.531 0.674
5 5.563 0.258 0.258 0.375 0.375 0.500 0.625 0.750
6 6.625 0.280 0.280 0.432 0.432 0.562 0.719 0.864
8 8.625 0.250 0.277 0.322 0.322 0.406 0.500 0.500 0.594 0.719 0.812 0.906 0.875
10 10.750 0.250 0.307 0.365 0.365 0.500 0.500 0.594 0.719 0.844 1.000 1.125 1.000
12 12.750 0.250 0.330 0.375 0.406 0.562 0.500 0.688 0.844 1.000 1.125 1.312 1.000
14 14.000 0.250 0.312 0.375 0.375 0.438 0.594 0.500 0.750 0.938 1.094 1.250 1.406
16 16.000 0.250 0.312 0.375 0.375 0.500 0.656 0.500 0.844 1.031 1.219 1.438 1.594
18 18.000 0.250 0.312 0.438 0.375 0.562 0.750 0.500 0.938 1.156 1.375 1.562 1.781
20 20.000 0.250 0.375 0.500 0.375 0.594 0.812 0.500 1.031 1.281 1.500 1.750 1.969
22 22.000 0.250 0.375 0.500 0.375 0.875 0.500 1.125 1.375 1.625 1.875 2.125
24 24.000 0.250 0.375 0.562 0.375 0.688 0.969 0.500 1.219 1.531 1.812 2.062 2.344
30 30.000 0.312 0.500 0.625 0.375 0.500
32 32.000 0.312 0.500 0.625 0.375 0.688
34 34.000 0.312 0.500 0.625 0.375 0.688
36 36.000 0.312 0.500 0.625 0.375 0.750
42 42.000 0.500 0.625 0.375 0.750

API 5L PIPE OUTSIDE DIAMETER TOLERANCE

Specified outside
diameter D mm (in) of API 5L Pipes

API 5L Diameter tolerances mm (in)

API 5L Out-of-roundness tolerances mm (in)

Pipe except at end a

Pipe end a,b,c

Pipe except at end a

Pipe end a,b,c

SMLS pipe

Welded pipe

SMLS pipe

Welded pipe

< 60.3 (2.375)

– 0.8 (0.031 ) to + 0.4 (0.016)

– 0.4 (0.016) to + 1.6 (0.063)

d

≥ 60.3 (2.375)
to
≤ 168.3 (6.625)

± 0.007 5 D

0.020 D

0.015 D

≥ 168.3 (6.625)
to
≤ 610 (24.00)

± 0.007 5 D

± 0.007 5 D

but maximum

of + 3.2 (0.125)

± 0.005 D,

but maximum of ± 1.6 (0.063)

> 610 (24.000)
to
≤ 1 422 (56.00)

± 0.01 D

± 0.005 D,

but maximum

of + 4.0 (0.160)

± 2.0 (0.079)

± 1.6 (0.063)

0.015 D

0.01 D,

but maximum of
15 (0.6),

but maximum of 13 (0.5),

for d / ts ≤ 75

for d / ts ≤ 75

by agreement

by agreement

for d / ts > 75

for d / ts > 75

> 1 422 (56 000)

as agreed

a — Pipe end includes a length of 100 mm (4.0 in) for each side
b — For SMLS pipe, the tolerances apply for 25.0 mm (0.984 in); tolerances for thicker pipes have to be as agreed.
c — For pipe with D219,1 mm (8.625 in) the diameter tolerance and the out-of-roundness tolerance may be determined by using the calculated inside diameter (the specified outside diameter minus two times the specified wall thickness) or measured inside diameter rather than the specified outside diameter
d — Included in the tolerance of the diameter

API 5L PIPE WALL THICKNESS TOLERANCE (WT)

API 5L wall thickness t
mm (in)

API 5L Pipes Tolerances a
mm (in) mm (in)

API 5L SMLS pipe b

≤ 4,0 ( 0.157)

+ 0,6 (0.024)
– 0,5 (0.020)

> 4,0 ( 0.157) to < 25,0 (0.984)

+ 0,150
– 0,125

≥ 25,0 (0.984)

+3,7 (0.146) or + 0,1 t whichever is the greater
– 3,0 (0.120) or – 0,1 t whichever is the greater

API 5L Welded pipe c, d

≤ 5,0 (0.197)

± 0,5 (0.020)

> 5,0 (0.197) to <15,0 (0.591 )

± 0, 1 t

≥ 15,0 (0.591)

±1,5 (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 ≥ 355,6 mm (14.000 in) and t ≥ 25,0 mm (0.984 in) the wall thickness tolerance locally may exceed the plus tolerance for wall thickness by an additional 0,05 t, provided that the plus tolerance for mass (see 9.14) is not exceeded.
c — The plus tolerance for wall thickness does not apply to the weld area.
d — See 9.13.2 for additional restrictions.


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