API 5L PSL2 Grade BQ (L245Q) line pipe means that the pipe is of Grade B and is delivered in quenched and tempered (Q) condition. It is produced in welded pipes and seamless pipes. API 5L PSL2 Grade BQ (L245Q) line pipes are designed for conveying gas, water, and oil in the natural gas and oil industries.
PSL 2 has the different level of specification. These pipes will show higher performance and good quality chemical and mechanical composition of these pipes. These pipes have good productions which include all the hydraulic pressure tests as well as it can easily pass the standard tests to verify its quality. They also easily pass the nondestructive test of the pipes.
API 5L PSL2 Grade BQ 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 Grade BQ 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 Grade BQ 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 line pipe.
Chemical composition(%) of API 5L PSL2 Grade BQ steel pipe
| C max. |
Si max. |
Mn max. |
P max. |
S max. |
V max. |
Nb max. |
Ti max. |
Other |
| 0.18 |
0.45 |
1.40 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
e |
e, Unless otherwise agreed, Cu≤0.50, Ni≤0.30; Cr≤0.30; and Mo≤0.15;
Mechanical properties of of API 5L PSL2 Grade BQ steel pipe
| Pipe grade |
Yield Strength, Rt0.5 (MPa) |
Tensile Strength, Rm(MPa) |
Ratio Rt0.5/Rm max. |
| L245Q or BQ |
245 to 450 |
415 to 760 |
0.93 |
API 5L PSL2 Grade B steel pipe acceptable delivery condition API 5L PSL2 line pipes can be delivered in as-rolled (R), normalizing rolled, normalized formed, normalized or normalized and tempered (N), quenched and tempered (Q), thermomechanical rolled, or thermomechanical formed(M).
Available pipe tests for API 5L PSL2 Grade BQ line pipeChemical composition analysis(product analysis)
Tensile tests
Hydrostatic test
Bend test
Flattening test
CVN impact test for PSL2 line pipe
MT magnetic particle testing
NDT non-destructive testing
API 5L PSL2 Grade BQ (L245Q) pipelines are economically best solution in the field of pipes. They are mainly used to provide the solution for the transportation system of natural gases, petroleum oil, water and many other expensive materials.
