鋼管

Steel pipes can be divided into two categories according to production methods: seamless steel pipes and welded steel pipes, with welded steel pipes referred to as welded pipes.
1. Seamless steel pipes can be divided into hot-rolled seamless pipes, cold drawn pipes, precision steel pipes, hot expanded pipes, cold spun pipes, and extruded pipes according to production methods.
Seamless steel pipes are made of high-quality carbon steel or alloy steel, and can be hot-rolled or cold-rolled (drawn).
2. Welded steel pipes are divided into furnace welded pipes, electric welding (resistance welding) pipes, and automatic arc welded pipes due to their different welding processes. They are divided into straight seam welded pipes and spiral welded pipes due to their different welding forms, and are further divided into circular welded pipes and special-shaped (square, flat, 等。) welded pipes due to their end shapes.
Welded steel pipes are made by welding steel plates rolled into a tube shape with butt or spiral seams. In terms of manufacturing methods, they are divided into welded steel pipes for low-pressure fluid transportation, spiral seam welded steel pipes, direct rolled welded steel pipes, welded steel pipes, 等. Seamless steel pipes can be used for liquid and gas pipelines in various industries. Welded pipes can be used for water pipelines, gas pipelines, heating pipelines, electrical pipelines, 等.