Marine engineering

Standard: API SPEC 5CT API 5CT pipe Size (mm): Outer Dimensions: 6.0mm – 219.0mm Wall Thickness: 1.0mm – 30 mm Length: max 12000mm Application: gas, water and oil transportation in both oil and natural gas. The main steel grade of API 5CT: API 5CT J55, API 5CT K55, API 5CT N80, API 5CT L80, API 5CT P110.

ASTM A209 specifies the requirements for various grades of minimum wall thickness seamless carbon-molybdenum alloy steel tubes. These grades include T1, T1a, and T1b, which are different in terms of their chemical composition and mechanical properties.

The specification covers grades of stainless steel tubing for general corrosion-resisting and low or high-temperature service.

The structure steel pipe has hot – rolled seamless steel tube and welded steel tube.The seamless steel tube for structure is divided into two types according to the provisions of “seamless steel tube for structure”