API 5CT Steel Pipe

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 Description 

Product 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 NameAPI 5CT Steel Pipe Description
StandardEN/DIN/JIS/ASTM/BS/ASME/AISI, etc.
Outer DiameterSeamless: 1/4"-36"Welding: 21.3mm-3620mm
Round tube: 1/2"-10"Square tube/rectangular tube: 15x15-400x600mm
Wall ThicknessSeamless: 1.25mm-50mmWelding: 1.65mm-65mm
Length3-12 meters, support customization
Surface Technologybright, polished, black
Other ServiceMechanical processing (CNC), centerless grinding (CG), heat treatment, annealing, pickling, polishing, rolling, forging, cutting, bending, small processing, etc.

 

Chemical Composition

GradeCMnPSCrNiWithVAls
API5CTJ550.20-0.391.25-1.500.0200.0150.150.200.20/0.020
API5CTK550.34-0.391.25-1.500.0200.0150.150.200.20/0.020
API5CTN800.34-0.381.45-1.700.0200.0150.15//0.11-0.160.020
API5CTJ800.15-0.220.25-1.000.0200.01012.0-14.00.200.20/0.020
API5CTJP1100.26-0.350.40-0.700.0200.0100.80-1.100.200.200.080.020

Mechanical behavior

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

Application scope

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

 

FAQ

Q: Do you accept third-party inspection?

A: Yes, we absolutely accept it.

 

Q: Do you provide samples? Free or extra?

A: The cost of samples is calculated based on the value. Shipping fee is necessary.

 

Q: Do you have a large inventory of steel?

A: Yes, we have a large indoor warehouse with a total annual spot inventory of more than 200,000 tons.

 

 

Q: What is your delivery time and supply capacity?

A: The delivery time is usually within 15~28 working days, and we can supply about 10,000 tons per month.

 

Q: How to order?

A: Buyer sends inquiry-->Buyer gets quotation-->Order confirmation-->Buyer sends deposit-->Seller prepares goods-->Seller strictly inspects-->Buyer arranges balance payment-->Packaging and delivery.

 



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