| 摘要 |
<p>PURPOSE:To facilitate rising of buried resin-made pipings for city gas, city water, etc., from underground to the ground. CONSTITUTION:A resin-made end pipe 3 allowable of electric fusion weld is mechanically joined to one end of a metallic flexible pipe 1 having weather- resistant resin coating 2, a resin-made flexible pipe 10 is installed on the outer side of part of one end side of the metal flexible pipe, and drip-proofing process is applied to both end parts of this resin flexible pipe 10 to compose a riser pipe. At one end side of this riser pipe, end parts of the resin-made end pipe 3 and buried resin-made pipings 4 are put to be close to each other through a fusion weld joint 13, they are connected to each other by fusion weld, and the other side is connected to a connection part on the ground side by a mechanical joint. Otherwise, one end sides of a pair of the riser pipes are put to be close to each other through the fusion weld joint 13, they a connected to each other by fusion weld, and they are buried in the ground, while the other end sides are raised to the ground.</p> |
