1. Different appearance
Seamless steel pipe: a steel pipe made of a single piece of metal without seams on the surface.
Welded pipe: It is a steel pipe made of zhi steel or dao steel that is crimped and welded. The length is generally 6 meters, and there are welded seams on the surface.
Seamless steel pipe
Welded pipe
2. Different classification
Welded pipes: divided into general welded pipes, galvanized welded pipes, oxygen-blowing welded pipes, wire casings, metric welded pipes, roller pipes, deep well pump pipes, automotive pipes, transformer pipes, electric welded thin-walled pipes, electric welded special-shaped pipes, scaffolding pipes and spirals Welded pipe.
Seamless steel pipes: According to different production methods, they are divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, pipe jacks, etc., all have their own process regulations.
3. Different application scope
Welded pipe: The product is widely used in water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. It is one of the 20 key products developed in my country. Water Supply and Sewerage. For gas transportation: coal gas, steam, liquefied petroleum gas. Used for piling pipes and bridges; pipes for docks, roads, and building structures.
Seamless steel tubes: Seamless steel tubes are widely used. General-purpose seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, with the largest output, and are mainly used as pipelines or structural parts for conveying fluids.
