API 5CT C90 T95 Casing and tubing,Oilfield Casing Pipes
Most casing steel grades are largely of the same chemical composition. What gives each grade its distinct properties is the kind of heat treatment applied. Casing grades mainly differ in their yield strength, tensile strength, and hardness.
Additional tests required by API 5CT for certain groups of casing make sure that each casing grade is suitable for its intended application.
API 5CT C90 T95 Casing and tubing making process
Plain pipe-end upsetting- Austenite treatment-Quenching-Tempering-straightening-(Non-Destructive Testing)- Threading-Thread inspection-coupling MPI-phosphating-Coupling make up-Drifting-Hydrostatic testing-Measuring&Weight-Marking&Stenciling-Coating-Packing Casing and tubing-Transportation
C90 (C90-1)
- Yield strength: 621-724 MPa (90-105) ksi,
- Minimum tensile strength: 689 MPa (100 ksi)
- API color code: 1 purple band
T95 (T95-1)
- Yield strength: 655-785 MPa (95-110 ksi),
- Minimum tensile strength: 724 (105 ksi)
- API color code: 1 silver band
Chemical Component Analysis
Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation)
Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc)
Exterior Size Inspection
Nondestructive Test (Ultrasonic flaw detector, Eddy current flaw detector)
Hydrostatic Test(The standard pressure is limited to 20,7 MPa (3000psi))
Electro-magnetic inspection to SR1 is carried out on all line pipes.
Finished API 5CT Oil Seamless Casing Pipe
Standard
API 5CT/ ISO11960
Grade
Group.1
H40/PSL.1, J55/PSL.1, J55/PSL.2, J55/PSL.3, K55/PSL.1, K55/PSL.2, K55/PSL.3,
N80(1)/PSL.1, N80(1)/PSL.2, N80(Q)/PSL.1, N80(Q)/PSL.2, N80(Q)/PSL.3
Group.2
M65/PSL.1, M65/PSL.3, L80/PSL.2, L80(1)/PSL.1, L80(1)/PSL.3, L80(9Cr)/PSL.1, L80(13Cr)/PSL.1, C90/PSL.1, C90/PSL.2, C90/PSL.3, T95/PSL.1, T95/PSL.2T95/PSL.3
Group.3
P110/PSL.1, P110/PSL.2, P110/PSL.3,
Group.4
Q125/PSL.1, Q125/PSL.2, Q125/PSL.3,
Minimum Order Quantity
30 Ton
Outside Diameter Ranges
Tubing
1.315 inch to 4 1/2 inch or 48.26mm to 114.3mm
Casing
4 1/2 inch to 13 3/8 inch or 114.3mm to 339.72mm
Wall Thickness
According to API 5CT Standard
Length
Tubing
R1 (6.10m to 7.32m), R2 (8.53m to 9.75m), R3 (11.58m to 12.80m)
Casing
R1 (4.88m to 7.62m), R2 (7.62m to 10.36m), R3 (10.36m to 14.63m)
Type
Seamless
Type of End-Finish
Tubing
P, I, N, U
Casing
P, S, B, L
