Pipeline Steel Plate
As we know octg pipes (line pipe or casing and tubing pipes) have two different manufacturing methods, seamless and welded. So pipeline steel plate is dessigned to be processed into welded line pipes, including ERW, LSAW, SSAW welding processes. And API 5CT pipes can also be made in welded ERW type, so pipeline steel plate and coils also covers these pipes. But welded api 5ct pipe is not always accepted, mostly, casing and tubing pipe are accepted in seamless types.
Pipeline steel plates are used to fabricate large diameter welded pipes which transport oil and nature gas.Now more and more world's people foucs on protecting our enviroment,the new clean energy nature gas is widely used through pipelines.These pipeline steel plates owned ability of resisting high pressure,atmospheric corrosion and lower temperature surroundings.GNEE steel Pipeline steel plates main steel grade:API 5L Gr.B X42 X52 and so on.
API Spec 5L PSL1
API Spec 5L PSL1 X70
PipeAPI Spec 5L PSL1 X60
PipeAPI Spec 5L PSL1 X65
PipeAPI Spec 5L PSL1 X52
PipeAPI Spec 5L PSL1 X56
PipeAPI Spec 5L PSL1 X42
PipeAPI Spec 5L PSL1 X46
PipeAPI Spec 5L PSL1 Grade A
API Spec 5L PSL1 Grade B
API Spec 5L PSL2
API Spec 5L PSL2 X70
PipeAPI Spec 5L PSL2 X80
PipeAPI Spec 5L PSL2 X60
PipeAPI Spec 5L PSL2 X65
PipeAPI Spec 5L PSL2 X52
PipeAPI Spec 5L PSL2 X56
PipeAPI Spec 5L PSL2 X42
PipeAPI Spec 5L PSL2 X46
PipeAPI Spec 5L PSL2
Grades Mechanical properties of pipeline steel plate
| Grade | Permissible yield point ratio | Yield Strength MPa(min) | Tensile Strength MPa | Elongation % (min) | |
| API 5L | EN 10208-2 | ||||
| API 5L Gr. B | L 245NB | ≤ 0.85 | 240 | 370 - 490 | 24 |
| API 5L X 42 | L 290NB | ≤ 0.85 | 290 | 420 - 540 | 23 |
| API 5L X 52 | L 360NB | ≤ 0.85 | 360 | 510 - 630 | |
| API 5L X 60 | L 415NB | ||||
| API 5L Gr. B | L 245MB | ≤ 0.85 | 240 | 370 - 490 | 24 |
| API 5L X 42 | L 290MB | ≤ 0.85 | 290 | 420-540 | 23 |
| API 5L X 52 | L 360MB | ≤ 0.85 | 360 | 510 - 630 | |
| API 5L X 60 | L 415MB | ||||
| API 5L X 65 | L 450MB | ≤ 0.85 | 440 | 560 - 710 | |
| API 5L X 70 | L 485MB | ≤ 0.85 | 480 | 600 - 750 | |
| API 5L X 80 | L 555MB | ≤ 0.90 | 555 | 625 - 700 | 20 |
The main materials and grade of large diameter pipeline steel plate are :
| Material # | EN 10208-2 | DIN 17172 | API 5L |
| 1.0457 | L 245NB | StE 240.7 | Gr. B |
| 1.0484 | L 290NB | StE 290.7 | X 42 |
| 1.0582 | L 360NB | StE 360.7 | X 52 |
| 1.8972 | L 415NB | StE 415.7 | X 60 |
| 1.0418 | L 245MB | StE 240.7 TM | Gr. B |
| 1.0429 | L 290MB | StE 290.7 TM | X 42 |
| 1.0578 | L 360MB | StE 360.7 TM | X 52 |
| 1.8973 | L 415MB | StE 415.7 TM | X 60 |
| 1.8975 | L 450MB | StE 445.7 TM | X 65 |
| 1.8977 | L 485MB | StE 480.7 TM | X 70 |
| 1.8978 | L 555MB | X 80 |

Pipeline steel plate is rolled according to API standard and widely used to transport oil, natural gas and other large diameter welded steel pipes.
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