... ,GR16 ASTMB337 ASTM338. Titanium pipe and titanium tube1.Rolled Seamless Tube:Grade: GR1 GR2 GR6, GR7, GR9, GR12,GR16 etcSize(mm ... ): diameter (3-114)*(0.2-6.0)W*L18000Standard: ASTMB337 ASTMB338 (ASME), ASME SB3382.Welded Tube:Grade: GR1 GR2Size(mm): diameter ... (8-63)*(0.5-3.0)W*LStandard: ASTMB3383.Extruded Tube:Grade: GR1 GR2.Size(mm): diameter(25-210)*(6.0 ...