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API 5CT Steel Pipe

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Oct-31/2024

API 5CT Steel Pipe DescriptionAPI 5CT is a standardtechnical specification ofsteel pipes for casing and tubing in oil or gas industries. It can be used in oil or gas drilling and conveying. Commonly used oilfield API-5CT casing steel grades areJ55, K55, N80-

API 5CT Steel Pipe Description

API  5CT is a standard technical specification of steel pipes for casing and  tubing in oil or gas industries. It can be used in oil or gas drilling  and conveying. Commonly  used oilfield API-5CT casing steel grades are J55, K55, N80-1, N80Q,  P110. Casings are mostly used in oil well drilling. According to the  API-5CT standard, pipes can be divided into STC (short thread), LTC  (long thread) and BTC (support thread) and their joints.


Product Parameters

Product Name

API 5CT Steel Pipe

Standard

EN/DIN/JIS/ASTM/BS/ASME/AISI etc.

Outer Diameter

Seamless: 1/4"-36"

Welding: 21.3mm-3620mm

Round Tube: 1/2"-10"

Square Tube/Rectangular Tube: 15x15mm-400x600mm

Wall Thickness

Seamless: 1.25mm-50mm

Welding: 1.65mm-65mm

Length

3-12 meters, Support customization

Surface Process

Bright, Polished, Black

Other Services

Machining(cnc),  Centerless Grinding(cg), Heat Treatment, Annealing, Pickling,  Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

 

Chemical Composition

Grade

C ≤

Si ≤

Mn ≤

P ≤

S ≤

Cr ≤

Ni ≤

With

V ≤

Als ≤

API 5CT J55

0.34-0.39

0.20-0.35

1.25-1.50

0.020

0.015

0.15

0.20

0.20

/

0.020

API 5CT K55

0.34-0.39

0.20-0.35

1.25-1.50

0.020

0.015

0.15

0.20

0.20

/

0.020

API 5CT N80

0.34-0.38

0.20-0.35

1.45-1.70

0.020

0.015

0.15

/

/

0.11-0.16

0.020

API 5CT L80

0.15-0.22

1.00

0.25-1.00

0.020

0.010

12.0-14.0

0.20

0.20

/

0.020

API 5CT J P110

0.26-035

0.17-0.37

0.40-0.70

0.020

0.010

0.80-1.10

0.20

0.20

0.08

0.020

 

Mechanical Properties

Grade

Yield Strength (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  P110

758-965

≥ 862

 

Scope of Application

API 5CT oil casing is mainly used to transport oil, natural gas, coal gas, water and other liquids, gases.


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