Drain pipes made of metal; Metal pipe couplings and joints; Metal pipe fittings; Metal pipes; Metal pipes and fittings therefor; Metal sewer pipes; Metal water pipes; Steel pipes and tubes; Elbows of metal for pipes; Metal drain pipes; Metal expansion joints for piping and ducting; Metal gutter pipes; Metal junctions for pipes; Metal penstock pipes; Metal pipe clips; Metal pipe collars; Metal pipe connectors; Metal pipes for liquid and gas transfer