articles of metal or primarily of metal for use in or with pipes and pipework systems, namely, pipe couplings, pipe connectors, pipe fittings, flanges, flanges which have steel reinforcement rings, gaskets for use in fuel and petrol service station installations and bolts, ball valves not being parts of machines and flexible pipe connectors, pipe fittings in the nature of terminating reducers and terminating boots, stabilizer bars for pipes, pipe fittings in the nature of test ports, fusion seal caps, pipe fittings in the nature of boots for fusion seal, ring-shaped pipe fittings of metal in the nature of backing rings, jubilee pipe clips, manually operated pressure vent valves; pipe couplings of metal; metal pipe fittings in the nature of entry boots; metal pipe collars

non-metallic flexible pipes; non-metallic flexible pipes for subterranean use in fuel and petrol service station installations; non-metallic flexible pipes for use in carrying petroleum or petroleum products including petrol and other fuels; primary, lined and secondary contained non-metallic flexible pipes; flexible pipes made from polyethylene; non-metal fittings for pipes in the nature of vents and vapor recovery lines for use with the aforesaid pipes; non-metallic flexible pipes, non-metal pipe fittings in the nature of pipe connectors and non-metal pipe junctions; non-metal pipe couplings, non-metal pipe fittings in the nature of connectors, sockets, elbows, T-junctions and tees, bends, reducers, termination and sliding electrofusion reducers, 5-bends, end caps, stubs, welding sockets, joints and seals, including electrofusion connectors; non-metal pipe couplings, non-metal pipe junctions, non-metal pipe joints, and non-metal pipe fittings in the nature of extensions; non-metallic seals for fuel and petrol pipes for stopping leakage of fluids; non-metal pipe fittings in the nature of entry boots; non-metal parts and fittings for the aforesaid goods

education, training and instruction, namely, providing classes, seminars, and workshops in the field of design, construction, repair, installation and maintenance of fuel and petrol service stations, including fuel and petrol service station forecourt installations, and including the design, installation, maintenance and repair of pipework, pipework systems, tanks, modular tank and canopy systems, service station buildings and associated constructions, for fuel and petrol service stations; advisory services in the field of educational activities in the fields of design, construction, repair, installation and maintenance of fuel and petrol service stations

certification, namely, testing, analysis, and evaluations of the training awards of others in the field of education on the subject of design, construction, repair, installation, and maintenance of fuel and petrol service stations to determine conformity with certification standards; certification, namely, testing, analysis, and evaluation of the educational services of others in the field of design, construction, repair, installation, and maintenance of fuel and petrol service stations to determine conformity with certification standards