| 摘要 |
1416947 Lining pipes TAKATA KOJYO CO Ltd 17 Oct 1973 [18 Oct 1972] 48283/73 Heading F2P A method of lining a pipe B (e.g. to repair the pipe) includes the steps of inserting in the pipe B a synthetic organic polymeric resin tube 8 having reinforcing fibres embedded therein and extending peripherally thereof and having an outside diameter less than the inside diameter of the pipe B, expanding the tube 8 while in a soft flexible condition at an elevated temperature into tight engagement 8<SP>1</SP> with the inside face of the pipe B by means of a pressurized fluid within the tube 8, and relieving the fluid pressure and cooling the tube while in engagement with the pipe. The tube 8 may be formed from a thermoplastic material, e.g. polyvinyl chloride or a polyolefin, or a thermosetting resin containing a heat sensitive curing or crosslinking agent. The tube may be reinforced by a woven web embedded therein in which the warp extends longitudinally and is of low elongation (e.g. stretch oriented polyester or polyamide or glass fibres) and the weft extends peripherally and is of high elongation (e.g. unstretched polyester or polyamide filaments or yarns). A heat sensitive adhesive may be applied to the inner surface of the pipe B and/or to the outer surface of the tube 8. The tube 8 is applied by inserting the tube 8 in collapsed condition into the pipe B, clamping the ends of the tube 8 between pipe end flanges 6 and end plates 9, 9<SP>1</SP> and expanding the tube 8 by hot pressurized air by means of heater 10 and pump 11. The method may be applied to the lining of new pipes before installation or to the repair of damaged pipes in situ as shown, e.g. underground pipes such as sewer pipes or mains for water, gas and utilities. |
