Repair and renovation of sewage pipe - by applying sealing liq. at high pressure to inside surface

摘要

The system enables invention concerns a method of repair and renovation of a sewage pipe which is of too small a dia. for personnel to walk inside. A liq. is applied at high pressure to the internal surface of the pipe by means of a bath. This bath is formed from two discs (5,6) fitted with sealing rings around their edges. Each disc has a dia. equal to the ID of the sewage pipe and the discs are held at a fixed distance apart. The discs are inserted into the sewage pipe through a manhole and then pulled through the pipe by means of a cable to a second manhole. The space between the discs is filled with the high pressure sealing liq. USE - Renovating sewers.