General seamless steel pipes are used for various fluid conveyance pipelines such as water, gas, and oil, as well as for manufacturing various structural components. Sampling tests should be conducted on their mechanical properties, including tensile strength, yield strength, and elongation. Conveyance pipes typically operate under pressure and require hydrostatic tests, as well as tests for expansion, flattening, and rolling edge. For large-scale long-distance pipelines transporting crude oil, finished oil, and natural gas, additional requirements are imposed, such as carbon equivalent, welding properties, low-temperature impact toughness, stress corrosion under severe corrosion conditions, corrosion fatigue, and strength in corrosive environments.

Standard boiler tubes are used for manufacturing superheated steam pipes and water pipes for various structural boilers; high-pressure boiler tubes are used for superheated steam pipes, heat exchangers, and pipes for high-pressure equipment in high-pressure or ultra-high-pressure boilers. These steel pipes for thermal equipment operate under different high-temperature and high-pressure conditions and should ensure good surface condition, mechanical properties, and process properties. Generally, their mechanical properties must be tested, including flattening and hydrostatic tests. High-pressure boiler tubes also require tests for grain size and more stringent non-destructive inspections.