Gas delivery pipe of one-piece plastic construction - is strongly expandable and compressible in direction of longitudinal axis without noticeable tensions inside it

摘要

Between the outside cylindrical sections (1) of the pipe at least one wave-form pipe section (2) or a bellows-shaped section is arranged. The pipe comprises several hollow cylindrical sections (1), between which a wave-form pipe section (2) and/or a bellows-shaped section is located. The wave-form section and/or the bellows section has a larger inner dia. than the hollow cylindrical section (1). The pipe is made of high pressure polyethylene or polyvinylchloride. The length of the hollow cylindrical section is equal to or longer than a half length of welding or adhesion muffs (3), with which the pipes are joined to a conduit. The wave-form part or bellows part is stabilised by a surrounding mass. USE/ADVANTAGE - A gas supply pipe which has high flexibility by virtue of a wave-form and/or bellows type section.