Standard boiler tubes are used for manufacturing superheated steam pipes and water pipes for various structural boilers; high-pressure boiler tubes are for superheated steam pipes, heat exchangers, and piping for high-pressure equipment in high 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 performance. Generally, they must be inspected for mechanical properties, including flattening and hydrostatic tests. High-pressure boiler tubes also require tests for grain size and more stringent non-destructive testing.

Mechanical seamless steel tubes must meet high dimensional accuracy, excellent mechanical properties, and surface condition requirements for their intended use. For bearing tubes, higher wear resistance, uniform structure, and strict tolerances for both inner and outer diameters are required. In addition to general mechanical property tests, low-magnification, fracture, annealing structure (spheroidizing, reticulate, strip), non-metallic inclusions (oxides, sulfides, pinpoint, etc.), decarburization layer, and hardness specifications must also be tested.