API 5L PSL2 X70Q(L485Q) line pipe means that the pipe is of Grade X70 and delivered in quenched and tempered (Q) condition. It is produced in welded pipes and seamless pipes. API 5L PSL2 X70Q(L485Q) line pipes are designed for conveying gas, water, and oil in the natural gas and oil industries. Specifications Levels PSL2 contains additional pipe delivery condition chemical composition, mechanical properties, and testing requirements.
The required minimum yield strength for API 5L PSL2 X70Q (L485) line pipe is 70,300 psi or 485 MPa while the minimum tensile strength is around 82,700 psi or 570 MPa.
API 5L PSL2 X70Q line pipe specification
| Standard |
Specification for Line Pipe(ANSI/API specification 5L - 44th Edition, October 1, 2007) |
| Line pipe sizes |
Nominal Pipe Size 1/2" to 48 " O.D. |
| Wall thickness |
SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XS, SCH XXS, All API 5L X70Q Pipe Thickness available |
| Pipe ends |
Plain, Bevel, Screwed, Threaded l245 pipe |
| Manufacturing types |
Seamless / ERW / Welded / Fabricated / CDW |
| Application & uses |
Conveying gas, water, oil, and other liquids |
The technical data of API 5L PSL2 X70Q line pipeIt is given based on API Spec 5L-2007 version. Below are the chemical composition and mechanical properties of seamless type and welded type API 5L PSL2 X70Q line pipe.
Chemical composition(a, %) of API 5L PSL2 X70Q steel pipe
| C max. |
Si max. |
Mn max. |
P max. |
S max. |
V max. |
Nb max. |
Ti max. |
Other |
| 0.18 |
0.45 |
1.80 |
0.025 |
0.015 |
g |
g |
g |
h |
g, Unless otherwise agreed, Nb+V+Ti≤0.15;
h, Unless otherwise agreed, Cu≤0.50, Ni≤0.50; Cr≤0.50; and Mo≤0.50;
Mechanical properties of of API 5L PSL2 X70Q steel pipe
| Pipe grade |
Yield Strength, Rt0.5 (MPa) |
Tensile Strength, Rm(MPa) |
Ratio Rt0.5/Rm max. |
| L485Q or X70Q |
485 to 635 |
570 to 760 |
0.93 |
API 5L PSL2 X70Q steel pipe acceptable delivery condition API 5L PSL2 X70Q line pipes are delivered in quenched and tempered (Q) condition.
Available pipe tests for API 5L PSL2 X70Q line pipeChemical composition analysis(product analysis)
Tensile tests
Hydro-static test
Bend test
Flattening test
CVN impact test for PSL2 line pipe
MT magnetic particle testing
NDT non-destructive testing
API 5L PSL2 X70Q steel pipe is available in seamless pipe and welded pipe, mainly used for pipeline transportation systems in the petroleum and natural gas industries. API 5L PSL2 X70 line pipe is suitable for oil and gas transmission, structural application, and mechanical components.
