| 摘要 |
<p>PURPOSE:To facilitate rising of buried resin-made pipings for city gas, city water, etc., fro underground to the ground. CONSTITUTION:A fusion weld joint A is connected to one end side of a metal flexible pipe 1 having resin coating 2 applied to enable direct burying through a mechanical connection joint B to which corrosion-protective process is applied to compose a riser pipe. The fusion weld joint A on one end side of the riser pipe is connected to an end part of the buried resin-made pipings by fusion weld, and the metal flexible pipe 1 on the other side is connected to a connection part on the ground side by a mechanical joint C.</p> |
