Zirconium pipe Seamless zirconium & zirconium alloy pipes or tubes may be cold drawn or hot rolled, supplied in annealed condition. Welded zirconium & zirconium alloy pipes or tubes shall be made from ASTM B551 strips, sheets or plates by automatic arc-welding process, furnished with stress-relieving & annealing heat treatment. http://www.zirconiumbar.com/