Seamless titanium pipes up to 114mm outer diameter. Larger pipes can be welded longitudinally from titanium sheets. Pipes with very heavy wall thickness can be made from round bars by drilling or extruding.
NOTE: ASTM B337 / ASME SB337 have been discontinued and replaced by ASTM B861 / ASME SB861 (titanium seamless pipe) and ASTM B862 /ASME SB862 (Titanium welded pipe).