1. Double tube bending with one piece material; 2.High level quality 3. Material: SS304 Or SS316 Product NameTube bending, or pipe ... or Spiral welded pipes, etc.StandardBS,ASTM,DIN,JSBends seriesHeating exchanger, coils, Return bends, U style, Serpentine tube and other special ... in advance.or L/C At SightPlace of OriginShanghai, China Heat Exchanger Stainless Steel Coil Tube Bending