Pipe couplings, metal, for plain end pipes, Metal pipework, valves and containers, Construction, Pipes, tubes, ducts and pipelines, steel, Nozzles and head sprinklers, metal, Pipe, tube and hose fittings, metal, Pipes, ferrous, for the building industry, Pipes, tubes, ducts and pipelines, ferrous metals, Fittings, metal, for compressed air pipes and hoses, Joints, cast iron, for fibre cement pipes