... 3. Professional Tech Support ASTM B381 Gr2 Titanium flange for machine 1. Material:Gr1,Gr2,Gr5,Gr7,Gr9,Gr12 2.Size ... . Working temperature: -60°C~250°C 6. Flange surface: FF,RF,TG,RJ etc 7.Quality control: Ultrasonic Testing & Material Test ...