... )Titanium Seamless Tube: Standard: ASTM B337, ASME SB337, ASTM B338, ASME SB338, ASTM B861, ASME SB861, AMS, MIL, DIN, BS, JIS, GB, ISO, etc. Grade: Gr1, Gr2 ... .2~8; maximum length: 18000mm; (2) Titanium Welded Tube: Standard: ASTM B337, ASME SB337, ASTM B338, ASME SB338, ASTM B862, ASME SB862, AMS, MIL, DIN ...