API 5L L390M or X56M PSL2 steel pipe is thermomechanical rolled or thermomechanical formed welded pipe for pipe line construction in oil, gas and water transport. API 5L L390M or X56M PSL2 concrete weight coated pipe is shorten as API 5L L390M or X56M PSL2 CWC pipe.
The concrete coating of API 5L L390M or X56M PSL2 concrete weight coated pipe consists of cement, water, aggregates and reinforcement materials. They are mixed in a mixer according to a specific proportion to form a special concrete, which is sprayed on the outside of API 5L L390M or X56M PSL2 pipe after external anti-corrosion treatment by spraying or extrusion spraying equipment, forming a concrete coating with a certain thickness together with the reinforced steel mesh, so as to increase the weight of API 5L L390M or X56M PSL2 pipe to overcome the buoyancy of the sea or water to the pipeline.
Welded API 5L L390M or X56M PSL2 concrete weight coated pipe, X56M CWC pipe chemical composition:
| Grade |
C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
Other |
CEIIW |
CEPCM |
| API 5L L390M or X56M PSL2 |
0.22 |
0.45 |
1.40 |
0.025 |
0.015 |
d |
d |
d |
e |
0.43 |
0.25 |
d. The sum of the niobium, vanadium and titanium concentrations shall be≤0.15 %.
e. Unless otherwise agreed, 0.50 % maximum for copper, 0.30 % maximum for nickel, 0.30 % maximum for chromium and 0.15 % maximum for molybdenum.
Welded API 5L L390M or X56M PSL2 concrete weight coated pipe, X56M CWC pipe mechanical properties:
| Grade |
Yield Strength |
Tensile Strength |
| Mpa (Psi) |
Mpa (Psi) |
| API 5L L390M or X56M PSL2 |
390 (56600)- 545(79000) |
490 (71100)- 760(110200) |
The concrete coating gives added weight to API 5L L390M or X56M PSL2 concrete weight coated pipe, enables it to better overcome buoyant force of the water. API 5L L390M or X56M PSL2 concrete weight coated pipe can be used in swampy land with high water tables and also underwater pipelines.
