Kimplas Piping Systems Ltd. Manufactures Polyethylene Pipes for Gas Applications. Kimplas Piping Systems Ltd. Also offers Pipes, fittings, valves, tools Polyethylene Pipes for Gas Applications is Transco approved and ISO: 4437 compliant. The Polyethylene Pipes for Gas Applications is available in sizes ranging from 20 mm to 250 mm outer diameter. The Polyethylene Pipes for Gas Applications is manufactured from PE 80 for yellow colored pipes and PE 100 for orange colored pipes.