| 摘要 |
<p>The invention relates to a connection device, used for for connecting a natural gas consummer, to a street distribution network, consisting of polyethylene pipes. According to the invention, the non-anodal end connection comprises a connecting piece (1), consisting of a hollow metal support, provided, at the exterior, with some grooves (a), where in one of them there is mounted a rubber ring (7), and in the others there is injected polyethylene, the connection between a duct (3) made of polyethylene and the piece (1) being carried out by means of an electrofusible sleeve (2), provided, at the interior, with a fusible metal thread (b), both the piece (1) and the duct being covered, at the exterior, by a protective metal pipe (4), mounted, at the ends, in connection with some sealing fittings (5 and 6).</p> |
