Titanium flange/flange over/blind Flange Material: Gr1,Gr2,Gr7,Gr12 Standard: ANSI B16.5 ASME HG3651 Titanium stub-end Material: Gr1,Gr2,Gr7,Gr12 Standard: ASME B16.9 Derchun Industries., Co.,Limited. Tel: 86-769-22821621 Fax: 86-769-22820687 Mobile: 86-13723585193 Home page: www.derchuntitanium.com Skype: amanddar Contact: Amanddar