METHOD AND APPARATUS FOR INTERNALLY LINING A DUCT

摘要

Internal lining of an underground pipe line is carried out by introducing into the pipe line (L) a tubular liner (11) impregnated or coated with an uncured but curable plastics material and enclosing an inflatable press hose (12), whereupon the press hose (12) is pressurized to press the liner (11) into engagement with the inside of the pipe line. The curing of the plastics material is accelerated by applying heat to the liner (11) and the plastics material from an inner conduit (14) disposed in the press hose (12), through which inner conduit hot water is conveyed.