Steel pipes used in oil and geological drilling operate under harsh conditions of high pressure, alternating stresses, and corrosive environments, thus requiring high strength levels and properties such as wear resistance, anti-torsion, and corrosion resistance. Tests for tensile strength, yield strength, elongation, impact toughness, and hardness should be conducted according to the steel grade. For casing, tubing, and drill pipes used in oil wells, there are more detailed classifications of steel grades and categories, as well as additional technical requirements for higher user-defined specifications tailored to different environments and geological conditions. These meet various special needs.

Various stainless steel tubes with heat and acid resistance, used in chemical, petrochemical cracking, aviation, and other mechanical industries, are not only subjected to mechanical property and hydrostatic tests but also require specific intergranular corrosion tests, flattening, expanding, and non-destructive testing, etc.