heat exchanger tubes titanium alloy pipeseamlessOD: 6mm to 325mmWT: 0.5mm to 20mmASTM B/ASME SB 861,337,338,DIN17861,DIN17866,DIN17869material:Gr1, Gr2, Gr3, Gr7, Gr9, Gr12,Gr16,Gr22,Gr37 3.7025,3.7035,3.7055,3.7225,3.7235,3.7255,3.7105,3.7165,3.7195,3.7175annual output:1000tonsWe are the manufacturer of titanium and stainless steel products..