... tubes are processed from titanium coil, and longitudinally welded by TIG process without metal filler, so it ... thickness (0.5-3) × length, of any length, coil, U tube Standard: ASTMB338, ASME SB338. Manual welding: Grade: GR1, GR2, GR7 ... Standard: ASTM B862 15365239179 +44 20 3286 8699 Wuxi advanced titanium technology Co., Ltd. Address:No21,changjiang Road, The National High ...