Steel Line Pipe VS Pipeline

Line pipes are steel pipes used for the transportation of oil, natural gas, petroleum, and water. Steel pipelines are mostly used in areas with harsh natural conditions such as polar regions, ice fields, deserts, and oceans. The lines are long, difficult to maintain, and have strict quality requirements and specifications. Pipeline steel is divided into seamless steel pipes and welded steel pipes according to their manufacturing methods. They are made of high-strength carbon steel and can be laid in cold, high-sulfur areas or on the seabed.

Advantages of Steel Line Pipe
This kind of line pipe usually has good mechanical properties, such as wall thickness, high strength, high toughness and wear resistance. It should also have large diameter, good weldability, low temperature resistance, corrosion resistance (CO2), seawater resistance and HIC resistance. ,SSCC performance.

high strength

Steel pipelines are not only required to have high tensile strength and yield strength, but also to provide a buckling ratio of 0.85~0.93.

High impact toughness

High impact toughness prevents cracking.

Low ductile-brittle transition temperature

Harsh regional and climatic conditions require pipeline steel to have sufficiently low plasticity and brittle transition temperatures. The shear area of DWTT (drop weight tear test) has become the main control indicator to prevent brittle damage of pipelines. It is generally required that the fracture shear area of the sample at the lowest operating temperature is ≥85%.

Excellent resistance to hydrogen-induced cracking (HIC) and sulfide stress corrosion cracking (SSCC)

good welding performance