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Application: Used as the Structural Retainer for the Walls of Oil, Gas Wells
Specification: OD: 4 1/2’’ ~ 20’’ (114.3mm ~ 508mm)
WT: 0.205’’ ~ 0.635’’ (5.21mm ~ 16.13mm)
LENGTH: R1, R2, R3
Standard: API 5CT J55/K55/N80/C75/L80/C90/T95/Q125
Process Type: Seamless (SMLS), Electric Resistance Welded (ERW)
End: Beveled, Square Cut, With LTC/STC/BTC/VAM Connection
Surface: Anti-corrosion&water Based Paint
Packing: Protection Caps in Both Ends, Waterproof Paper Wrapped, Two Tags
For details, delivery time and prices, please mail us
Production Process of API Casing Steel Pipe
Process of API Casing Steel Pipe
Specification of API Casing Steel Pipe
|
Types of steel tubes |
Outer Diameter |
Wall Thickness |
|
|
Cold-rolled tubes |
Tube sizes(mm) |
Tolerances(mm) |
Tolerances(mm) |
|
＜114.3 |
±0.79 |
－12.5% | |
Technical Datas of API Casing Steel Pipe
Chemical Composition
| Standard | Grade |
Chemical compositions（％） |
|||||||||
|
API SPEC 5CT |
J55 |
C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V |
| K55 |
0.34～0.39 |
0.20～0.35 |
1.25～1.50 |
≤0.020 |
≤0.015 |
≤0.15 |
≤0.20 |
≤0.20 |
/ | / | |
|
N80 |
0.34～0.38 |
0.20～0.35 |
1.45～1.70 |
≤0.020 |
≤0.015 |
≤0.15 |
/ | / | / |
0.11～0.16 |
|
|
L80 |
0.15～0.22 |
≤1.00 |
0.25～1.00 |
≤0.020 |
≤0.010 |
12.0～14.0 |
≤0.20 |
≤0.20 |
/ | / | |
|
P110 |
0.26～0.395 |
0.17～0.37 |
0.40～0.70 |
≤0.020 |
≤0.010 |
0.80～1.10 |
≤0.20 |
≤0.20 |
0.15～0.25 |
≤0.08 | |
| Grade | Type |
Total elongation under load (%) |
Yield strength (min) |
Yield strength (max) |
Tensile strength min Mpa |
Hardness Max (HRC) |
Hardness Max(HBW) |
| J55 | - |
0.5 |
379 | 552 | 517 | - | - |
| K55 | - |
0.5 |
379 | 552 | 655 | - | - |
| N80 | 1 |
0.5 |
552 | 758 | 689 | - | - |
| N80 | Q |
0.5 |
552 | 758 | 689 | - | - |
| L80 | 1 |
0.5 |
552 | 655 | 655 | 23 | 241 |
|
L80 |
9Cr |
0.5 |
552 | 655 | 655 | 23 | 241 |
|
L80 |
13Cr |
0.5 |
552 | 655 | 655 | 23 | 241 |
| C90 | - |
0.5 |
621 | 724 | 689 | 25.4 | 255 |
| C95 | - |
0.5 |
655 | 758 | 724 | - | - |
| T95 | - | 0.5 | 655 | 758 | 724 | 25.4 | 255 |
| P110 | - | 0.6 | 758 | 965 | 862 | - | - |
| Q125 | All | 0.65 | 862 | 1034 | 931 | - | - |
Surface of API Casing Steel Pipe
Anti-corrosion Water Based Paint
Packing of API Casing Steel Pipe
