titanium flange nut Material: GR1, GR2, etc. Standard: ASME/ANSI B16.5,DIN2630~ ... ,etc Surface: FF,RF,TG,RJ etc Gr1 Gr2 pure titanium flange 1. Material: Gr1 Gr2 Gr5 Gr7 Gr9 Gr1 2 ... . 3. Size:1/2”~80”(DN10~600) 4. Pressure rating: DIN: PN10, PN16, PN25 though PN250 ANSI:CL150, CL300, CL600, CL900 ...