6 Branching pipes of metal for pipelines; metal adaptors for pipes in the nature of pipe elbows, supports, fittings, branches and couplings; pivoting fittings of metal for pipes; collapsible pipes of metal; pipe collars of metal; flanges of metal; flanged pipes of metal; pipes, tubes and hoses, and fittings therefor, and manually operated valves, of metal; metal clamps for pipes; metal pipes and tubes; pipes and tubes of metal; couplings of metal for tubing; couplings of metal for pipelines; couplings of metal for pipes; metal coupling elements for tubing; metal coupling parts for tubing; pipe fittings, namely, junctions of metal; pipe spacers of metal; fittings of metal for pipes; pipe extensions of metal; fitting elements of metal for pipes; pipe bends of metal other than parts of machines; metal tubes for gas; ducts made of metal for trunking conduits for liquids; ducts made of metal for trunking pipes for gases; ducts made of metal for trunking pipes for liquids; metal air conditioning ducts; ducts of metal for concealing water pipes; tubes of stainless steel; metal pipe supports; collars of metal for fastening pipes; elbows of metal for pipes; elbows of metal for pipes including those from alloy steel and titanium; pipework of metal; pipes of metal including those from alloy steel and titanium; metal joint connectors for pipes; junctions of metal for pipes, namely, alloy steel and titanium; pipe muffs of metal; clips of metal for pipes; pipe support sleeves of metal; junctions of metal for pipes; tubes of metal including those from alloy steel and titanium; pipe couplings of metal; connectors of metal for pipes; connectors of metal for pipelines; junctions of metal for pipelines; junctions of metal for tubes; manifolds of metal for pipelines