High-pressure seamless steel pipes for the fertilizer industry are commonly used to transport chemical media (such as synthetic ammonia, methanol, urea, etc.) under corrosive conditions at pressures of 2200-3200 MPa, operating temperatures of -0 to 400°C. Therefore, in addition to withstanding high pressure, they should also possess strong corrosion resistance, good surface condition, and mechanical properties. Apart from mechanical property, flattening, and hydrostatic tests, corresponding intergranular corrosion tests, grain size analysis, and more stringent non-destructive testing should be conducted based on different steel grades.

Steel pipes used in oil and geological drilling operate under harsh conditions of high pressure, alternating stresses, and corrosive environments, thus they should possess high strength levels and features 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 different environments and geological conditions that users can choose from to meet higher specifications, catering to 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.