Stainless steel pipe is a kind of hollow and longitude steel, economic steel section is round shape. Stainless steel pipe and tube has been widely used in oil, chemical industry, medical, food, light industry, equipment and apparatus and structural parts etc. In additional, when twisting and anti-twist intensity is equal, stainless steel is more lighter, so it used in equipment parts and projects structural. Also used to produce all kinds of conventional weapons, barrel, shells and so on. This kind of pipes divide into: stainless steel seamless pipes and stainless welded pipes. According by manufacturing process can divided into following basic types: hot-rolled, extrusion, cold-circular, hexagonal, equilateral triangle, octagonal and other special-shaped stainless steel pipe

Manufacturing types and processes

1. Seamless Hot Rolling Processes

Round Pipe Billet → Heating → Perforation → Three Roll Skew Rolling, Continuous Rolling or Extrusion → Off Pipe → Sizing (Or Reducing Diameter)→ Cooling → Billet → Straightening → Water Pressure Test ( Or Flaw Detection) → Marking → Storage

2. Seamless Cold Rolling (Cold drawn) Processes

Round Pipe Billet → Heating → Perforation → Head → Annealing → Pickling → Oil (Copper) → Multi Pass Drawing (Cold Rolling) → Billet → Heat Treatment → Straightening → Water Pressure Test → Marking → Storage

3. Longitudinal welding (Straight seam welding) processes

Including ERW, EFW.