... DIN 2.material: TA1,TA2,TA9,TA10,Gr1/2/5 titanium hollow forged goodtitanium alloy ... flangestandard: GB/T,GJB,ASTM,ASM,DINmaterial: TA1,TA2 ... ,TA9,TA10,Gr1/2/5a. pure and alloy titanium flangeb. size ... chemical equipment, metallurgical, chemical machine, petrochemical1.titanium managing license2.our flange diameter is special ...