How are seamless steel pipes made? What are the theoretical weight specifications of seamless steel pipes?
A steel pipe made of a whole piece of metal with no seams on the surface is called a seamless steel pipe . Seamless steel pipes have a hollow cross-section and are widely used as pipelines for conveying fluids, such as pipelines for conveying oil, natural gas, coal gas, water and certain solid materials. According to the cross-sectional shape, seamless steel pipes are divided into round and special-shaped ones. Special-shaped pipes have square, oval, triangle, hexagon, melon seed, star, winged pipes and many other complex shapes. The following is a complete table of theoretical weights of seamless steel pipes, seamless steel pipe sizes and allowable deviation tables. How are seamless steel pipes made? 1. Main production process of hot-rolled seamless steel pipes (△ Main inspection process): Pipe blank preparation and inspection△→Pipe blank heating→Pipe perforation→Pipe rolling→Steel pipe reheating→Sizing (reducing) diameter→Heat treatment△→Finished pipe straighte