... GR12 etc 2.standard:ASTM B/ASME SB861,337 and 338 Titanium pipe and tube1.material:Gr1,Gr2,Gr3,Gr4,Gr5, GR7 GR9 ... the pressure vessel.CP grade4 can be used in some fittings and fastening pieces,but for complete shape need 300 degree celsius ... both in advanced quality and resonable price,welcome any inquiries!Tel:86-10-89243065Fax:86-10-89243047 Seamless Titanium alloy pipe and tube