Pipes of plastic; rigid pipes of plastics; composite pipes, not of metal; plastic composite pipes; multilayer composite pipes, not of metal; fibre composite pipes, not of metal; reinforced plastic pipes; fibre-reinforced plastic pipes; fabric-reinforced plastic pipes; thermoplastic pipes; thermoplastic composite pipes, not of metal; reinforced thermoplastic pipes; fibre-reinforced thermoplastic pipes; fabric-reinforced thermoplastic pipes; fibreglass-reinforced thermoplastic pipes; carbon fib...