1. Classification of welded pipes
Classification of welded pipes by use: According to the use, they are divided into general welded pipes, galvanized welded pipes, oxygen-blown welded pipes, wire casings, metric welded pipes, roller pipes, deep well pump pipes, automobile pipes, transformer pipes, electric welded thin-walled pipes, electric welded special-shaped pipes and spiral welded pipes.
2. Application scope of welded pipes
Welded pipe products are widely used in boilers, automobiles, ships, light-structure door and window steel for buildings, furniture, various agricultural machinery, scaffolding, wire threading pipes, high-rise shelves, containers, etc. All can meet customer requirements, and special specifications of welded pipes can be processed according to user requirements.
3. Theoretical calculation method of welded pipe weight
The theoretical calculation method of welded pipe weight has a formula to follow;
Theoretical weight of steel pipe per meter (density of steel is 7.85kg/dm3)
Calculation formula: W=0.02466 (D-S) S
Where: W--theoretical weight of steel pipe per meter, kg/m;
D--nominal outer diameter of steel pipe, mm;
S--nominal wall thickness of steel pipe, mm.
4. Official definition and industrial use of welded pipe
The blank used for welded steel pipe is steel plate or strip steel. Due to different welding processes, it is divided into furnace welded pipe, electric welded (resistance welded) pipe and automatic arc welded pipe. Due to different welding forms, it is divided into straight seam welded pipe and spiral welded pipe. Due to the shape of its end, it is divided into round welded pipe and special-shaped (square, flat, etc.) welded pipe.
ERW Pipe
