Boiler tubes refer to steel bars with open ends and hollow cross-sections, where the length is significantly greater than the circumference. They can be categorized into seamless steel tubes andWelded Steel PipeSteel pipe specifications are indicated by their outer dimensions (such as outer diameter or side length) and wall thickness, with a wide size range, from very small capillary tubes to large-diameter pipes with diameters reaching several meters. Steel pipes are used in pipelines, thermal equipment, the mechanical industry, oil and gas geological exploration, containers, the chemical industry, and for special applications.