Pipeline tubes are made from carbon steel and they are used for conveying gas,water and petroleum for oil and natural gas industries.
Tolerance On Dimension
|
Standard
|
Out Diameter
|
Wall Thickness Tolerance
|
|
Tolerance
|
Tolerance
|
|
API SPEC5L
|
D＜60.3
|
+0.41mm-0.80mm
|
+15%S, 12.5%S
|
|
API SPEC5L
|
D≥60.3
|
+0.75%D-0.75%D
|
Mechanical Properties
|
Standard
|
Grade
|
Yield strength (MPa)
|
Tensile strength (MPa)
|
Elongation(%)
|
Impact Enegy (J)
|
|
APISPEC5L
|
PSL 1
|
|
|
|
B
|
≥241.
|
≥414
|
|
X42
|
≥290
|
≥414
|
|
X46
|
≥317
|
≥434
|
|
X52
|
≥359
|
≥455
|
|
X56
|
≥386
|
≥490
|
|
PSL 2
|
|
|
Min
|
Max
|
Min
|
Max
|
Min
|
|
B
|
241
|
448
|
441
|
758
|
41（27）
|
|
X42
|
290
|
496
|
414
|
|
758
|
41（27）
|
|
X46
|
317
|
524
|
434
|
758
|
41（27）
|
|
X52
|
359
|
531
|
455
|
758
|
41（27）
|
|
X56
|
386
|
|
544
|
490
|
|
758
|
41（27）
|
Chemical Composition (%)
|
Standard
|
Grade
|
C
|
Mn
|
P
|
S
|
|
Max
|
Max
|
Max
|
Max
|
|
API SPEC 5L
|
PSL 1
|
|
B
|
0.28
|
1.2
|
0.03
|
0.03
|
|
X42
|
0.28
|
1.3
|
0.03
|
0.03
|
|
X46,X52,X56
|
0.28
|
1.4
|
0.03
|
0.03
|
|
PSL 2
|
|
B
|
0.24
|
1.2
|
0.25
|
0.015
|
|
X42
|
0.24
|
1.3
|
0.25
|
0.015
|
|
X46,X52,X56
|
0.24
|
1.4
|
0.25
|
0.015
|
