API 5CT tubes

API Spec 5CT Tubes are tubes used as liners or pipes for oil and gas wells. They can be provided at three levels of product specification: PSL-1, PSL-2 and PSL-3.

5CT / ISO 11960 specification.

Dimensions of API 5CT tubes (mm):

  • External dimensions: 6.0mm - 219.0mm
  • Wall thickness: 1.0 mm - 30 mm
  • Length: max 12,000 mm

Application:

Gas, water and oil transportation in oil and natural gas.

The main types of steel in the 5CT Tube:

API 5CT J55, API 5CT K55, API 5CT N80, API 5CT L80, API 5CT P110.

Chemical Compositions (%) of API 5CT
STEEL GRADEC≤Si≤ Mn≤P≤S≤Cr≤Ni≤Cu≤Mo≤V≤ Als≤
API 5CT J55 0.34-0.39 0.20-0.35 1.25-1.50 0,0200,0150,1500,2000,200--0,020
API 5CT K55 0.34-0.39 0.20-0.35 1.25-1.50 0,0200,0150,1500,2000,200--0,020
API 5CT N80 0.34-0.38 0.20-0.35 1.45-1.70 0,0200,0150,150---0.11-0.16 0,020
API 5CT L80 0.15-0.22 1,0000.25-1.00 0,0200,01012.0-14.0 0,2000,200--0,020
API 5CT J P110 0,26-035 0,17-0,37 0,40-0,70 0,80-1,10 0,0200,0100,2000,2000,0200,0800,15-0,25
Mechanical Properties of API 5CT
STEEL GRADEFLOW LIMIT (MPa)TENSILE STRENGTH (MPa)
API 5CT J55 379-552 ≥517
API 5CT K55 ≥655 ≥517
API 5CT N80 552-758 ≥689
API 5CT L80 552-655 ≥655
API 5CT J P110 758-965 ≥862
Download - API Spec 5CT Measurement Table

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