API 5CT seamless steel tubing
Peotroleum and natureal gas industies - Steel pipes for use as casing or tubing for wells.
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API 5CT is a standard on the oil casing by American Petroleum Institute, mainly for the oil pipe, tubing and casing.

Standard: API SPEC 5CT

Size (mm):

  • Outer Dimensions: 6.0mm ~ 219.0mm

  • Wall Thickness: 1.0mm ~ 30 mm

  • Length: max 12000mm 

Application: gas, water and oil transportation in both oil and natural gas.
Steel grade: J55, K55, N80, L80, P110.

Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers' requirements .

Painting: as requested.

As different geological conditions, underground complex stress state, pulling, pressing, bending, torsional stress acting on the combined effect of the tube, which the casing itself, the quality of the higher requirements. Once the casing itself is damaged for some reason, could lead to the whole production wells, or even scrapped.

Chemical Composition(%) of API 5CT

API 5CT J550.34-0.390.20-0.351.25-1.500.0200.0150.150.200.20//0.020
API 5CT  K550.34-0.390.20-0.351.25-1.500.0200.0150.150.200.20//0.020
API 5CT N800.34-0.380.20-0.351.45-1.700.0200.0150.15///0.11-0.160.020
API 5CT  L800.15-
API 5CT J P1100.26-0350.17-0.370.40-0.700.0200.0100.80-

Mechanical Properties of API 5CT

Steel GradeYield Strength (Mpa)Tensile Strength (Mpa)
API 5CT J55379-552≥517
API 5CT K55≥655≥517
API 5CT N80552-758≥689
API 5CT L80552-655≥655
API 5CT P110758-965≥862

API 5CT oil casing used in oil well drilling, which is mainly used for drilling and completion of the right wall of the support, to ensure that the conduct and completion of the drilling process after the normal operation of the wells.

Casing is to maintain the wells run lifeline.

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