METHOD FOR COATING PART TO BE COATED OF INNER FACE RESIN- CLAD PIPE WITH RESIN AND APPARATUS FOR EXPANDING DIAMETER AND HEATING

摘要

PROBLEM TO BE SOLVED: To provide a method for simply performing resin coating of a part to be coated such as an inner face of a welded part of an inner face resin-clad pipe.;SOLUTION: A resin sleeve 7 is inserted into the inside of the welded part 5 connected by butting and welding together pipe ends of the inner face resin- clad pipes 1 and an apparatus 10 for expanding the diameter and heating provided with a bag-like expanding body 11 provided with a cylindrical part 11a expandable in the diameter expanding direction by feeding a pressurized fluid inside and a heater 12 arranged on its cylindrical part 11a is arranged furthermore on its inside and while heating by the heater is performed, the expanding body 11 is expanded by pressurizing and the resin sleeve 7 is heated by means of the heater 12 under a condition where the resin sleeve 7 is pressed against the inner face of the pipe to stick it on the inner face of the clad pipe 1.;COPYRIGHT: (C)2002,JPO