An eversion nozzle, and a method for repairing an underground tubular conduit

摘要

An eversion nozzle (1) used in the operation of repairing an underground tubular conduit (13) by lining the inner wall of the tubular conduit with an everted tubular liner bag (6) impregnated with a hardenable liquid resin, wherein the nozzle is a hollow straight cylinder and its length L and inner diameter D have the relation: <MATH> An eversion method is also provided wherein the above eversion nozzle is utilized. <IMAGE>