Size range:   OD 10-273mm* WT 1.5-20mm
Standard:     ASTMA106,BS3059,DIN2391,EN102162
Steel grade:  A,B,C ,CFS320,360,X11GrMo5,25GrMo4,and
                  other grade can be provide after consulting
                  with customer .
Application:  For furnace,heat exchangers and pipeline in 
                  petroleum refining factories.