17 Flexible or semi-rigid plastic pipes, tubes, pipelines, risers, flowlines and non-electric coils; flexible or semi-rigid rubber pipes, tubes, pipelines, risers, flowlines and non-electric coils; synthetic plastic liners for pipes, tubes, pipelines, risers, flowlines and coils; synthetic rubber liners for pipes, tubes, pipelines, risers, flowlines and coils; parts and fittings made from rubber, plastic or synthetic rubber materials for use in the oil and gas industry, namely, flexible plastic, rubber or synthetic rubber pipes and pipe liners for conveying natural gas, oil and hydrocarbons; upstream pre-processing apparatus and installations for the production of oil and gas, namely, pipes, tubes, pipelines, risers, flowlines, liners, coils, flow conditioners, baffles and guides, all for oil and gas extraction, production and pre-processing apparatus and installations, and all formed wholly or predominantly of rubber or synthetic rubber; upstream pre-processing apparatus and installations for the production of oil and gas, namely, pipes, tubes, pipelines, risers, flowlines, liners, coils, flow conditioners, baffles and guides, all for oil and gas extraction, production and pre-processing apparatus and installations, and all formed wholly or predominantly of plastic