Introduction to API 5L PSL1 PSL2 line pipe
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Introduction to API 5L PSL1/PSL2 line pipe

API 5L line pipe steel grade: GR. B, X42, X46 and X52, X56, X60, X70

API 5L generally refers to the standard for pipeline steel, including pipeline steel pipes and pipeline steel plates. Pipeline steel pipes are pipelines used to transport oil, steam, and water from the ground to oil and natural gas industrial enterprises. According to the manufacturing method, pipeline steel pipes are divided into seamless pipes and welded steel pipes. Commonly used types of pipeline steel pipes include spiral submerged arc welded pipes (SSAW), straight seam submerged arc welded pipes (LSAW), resistance welding and other welded steel pipes. (ERW), seamless steel pipes are usually used when the pipe diameter is less than 152 mm.

API 5L PSL1/PSL2 Chemical Composition:

Standard Grade Chemical Composition (%)
API 5L PSL1 C Mn P S
B ≤0.28 ≤1.20 ≤0.030 ≤0.030
X42 ≤0.28 ≤1.30 ≤0.030 ≤0.030
X46 ≤0.28 ≤1.40 ≤0.030 ≤0.030
X52 ≤0.28 ≤1.40 ≤0.030 ≤0.030
API 5L PSL2 B ≤0.24 ≤1.20 ≤0.025 ≤0.015
X42 ≤0.24 ≤1.30 ≤0.025 ≤0.015
X46 ≤0.24 ≤1.40 ≤0.025 ≤0.015
X52 ≤0.24 ≤1.40 ≤0.025 ≤0.015

API 5L PSL1/PSL2 Mechanical Property:

Standard Steel Grade Yield Strength(MPa) Tensile Strength(MPa)
API 5L Line Pipe PSL1 Physical Properties
A25 172 310
A 207 331
B 241 414
X42 290 414
X46 317 434
X52 359 455
X56 386 490
X60 414 517
X65 448 531
X70 483 565
PSL2 Physical Properties
  241-448 414-758
B 290-496 414-758
X42 317-524 434-758
X46 359-531 455-758
X52 386-544 490-758
X56 414-565 517-758
X60 448-600 531-758
X65 483-621 565-758
X70 552-690 621-827

API 5L Line Pipe Dimensions:

API 5L Line Pipe Dimensions OD(mm) Wall Thickness(mm)
Pipes Body OD(mm) Allowable Tolerance(mm) OD(mm) Allowable Tolerance (mm)
≥60.3, S＜20 ±0.75% ≤73.0 +15%, -12.5%
≥60.3, S≥20 ±1.00% ＞73.0, S＜20 +15%, -12.5%
/ / ＞73.0, S≥20 +17.5%, -10%

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