Carbon Steel Pipes for API SPEC 5CT/5D/6A/6D

API SPEC 5CT/5D/6A/6D Carbon Pipe Supplier | Manufacturer | Exporter

Carbon Steel Welded Pipes

Material/Steel Grade:
Casting: J55, K55, N80, L80
Tubing: J55, K55, N80, L80, H40
Application: extracting petroleum
Casting: OD48.3~273 x WT2.77~11.43
Tubing: OD48.3~273 x WT2.77~11.43

Carbon Steel Seamless Pipes

Material/Steel Grade:
Casting: J55, K55, N80, L80, P110
Tubing:J55, K55, N80, L80, H40
Application: extracting petroleun
Casting:OD114~219 x WT5.2~22.2
Tubing:OD48.3~114.3 x WT3.2~16

Mechanical Properties Of API 5CT J55 Tubing

API 5CT Casing Pipe Standard API 5CT Casing Pipe Type API 5CT Casing Pipe Tensile Strength
API 5CT Casing Pipe Yield Strength
API 5CT Casing Pipe Hardness
API SPEC 5CT J55 ≥517 379 ~ 552 —-
K55 ≥517 ≥655
N80 ≥689 552 ~ 758
L80(13Cr) ≥655 552 ~ 655 ≤241HB
P110 ≥862 758 ~ 965

Steel Color Code Of API 5CT Grade J55 Carbon Steel Seamless Tubings

Name J55 K55 N80-1 N80-Q L80-1 P110
Casing a bright green band two bright green bands a bright red band a bright red band + a green band a red band + a brown band a bright white band
Coupling entire green coupling + a white band entire green coupling entire red coupling entire red coupling + a green band entire red coupling + a brown band entire white coupling

Description of API SPEC 5CT/5D/6A/6D

Carbon steel pipes are widely used in various industries due to their durability and cost-effectiveness. The API specifications mentioned in this article refer to the standards developed by the American Petroleum Institute (API) for different applications in the oil and gas industry.


This specification covers the technical requirements for casing and tubing used in the oil and gas industry. These pipelines are used to protect oil wells and ensure the smooth extraction of oil and gas. The carbon steel pipes used in this case need to meet certain mechanical properties and dimensional requirements.


This specification covers the manufacturing and dimensional standards of drilling equipment such as drill pipes, drill collars, and heavy drill pipes. These pipes are used to extract oil or gas from the earth’s crust during the drilling process. Carbon steel pipe used as drill pipe needs to meet specific requirements for strength, durability, and connection type.


This specification covers the requirements and standards for the design, manufacture, and testing of wellhead and Christmas tree equipment used in oil and gas drilling and production. While carbon steel is used for some components of these systems, the focus here is more on the overall design and safety aspects of the equipment.


This specification covers the design, manufacture, and testing standards for piping and piping system valves. It is used in various industries including oil and gas to ensure the proper functioning and safety of valves that control the flow of fluids. Carbon steel can be used to manufacture these valves, but the emphasis is on valve performance and reliability.

For any of these API specifications, the carbon steel pipe used must meet the relevant requirements for material properties, manufacturing processes, dimensions, and testing procedures.

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