Pipework of metal, pipes of metal, pipe tubes of metal, metal pipe clips, metal pipe collars, metal pipe connectors, metal pipe couplings and joints, metal pipe fittings for compressed air pipes, metal pipe fittings for rigid pipes, metal pipe fittings, namely, rosettes for rigid pipes, metal pipe muffs, metal pipes, metal pipes and metal fittings therefor, metal pipes and tubes

Zirconium and zirconium alloys