1.material: gr1,gr2,gr3,gr5,gr7,gr9,gr12 2.standard:astm b381,ANSI B16.5,DIN2630-2636,GB/T9116,HG29523 ... DESCRIPTION OF OUR FLANGEitem nametitanium flangeSTANDARDASTM,ANSI, DIN, GB,HGMATERIALGR1,GR2,GR3,GR4,GR5,GR7,GR9,GR10,GR12SIZEDN10-DN2000 0.6 ...