Generally, there are stainless steel round pipe wall thickness: 0.4～12mm, outer diameter: 6mm～600mm, of which φ16mm～76mm can produce two flowers to full flower tube; Foshan stainless steel square tube wall thickness: 0.4～4.0mm, outer diameter: 12×12 ~ 163 × 163mm; Foshan stainless steel rectangular tube wall thickness: 0.4 ~ 4.0mm, outer diameter: 20 × 10 ~ 120 × 60mm; Foshan stainless steel fan-shaped tube wall thickness: 0.7 ~ 1.0mm, outer diameter: R16 ~ R19; Foshan stainless steel oval Tube: 80 × 40 ~ 92 × 58; it is also the main stainless steel welded pipe for fluid transportation.