Flanges, couplings and adaptors, faucets, valves and accessories therefor, valve operators, manhole covers and collars therefor, swing joints, marine arms and band posts therefor, surge eliminators, line and tube strainers, floating suctions,floatation indicators, hoze nozzles and ground wires therefor, all the aforesaid goods being of metal or substantially of metal and all being parts of apparatus for bulk loading, bulk transporting,bulk unloading and delivery into storage of: petroleum products and petro-chemical substances in liquid or granular form; but excluding petrol pumps for retailing petrol to domestic motorists