Abstract
At present, when connecting polyethylene pipes for gas pipelines, two basic methods of welding are used: hot tool butt welding and welding with couplings and embedded heater. Hot tool flare welding is mainly used in polymer water supply systems. This paper presents results of research on implementation of this welding method when connecting polyethylene pipes in gas supply systems. It is proposed to use pieces of polyethylene pipes of larger diameter as couplings. Preliminary prolonged tensile tests of obtained welded joints showed effectiveness of this technology when joining polyethylene pipes.
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