| 摘要 |
A method for sealing an electrofusion joint formed by two pipes 1,2 and an electrofusion sleeve 3 comprises injecting a settable sealant between the pipes 1,2 or one of the pipes 1,2 and the sleeve 3 and allowing the sealant to settle. The pipes 1,2 and sleeve 3 are preferably made of a plastics material such as polyethylene. The sealant is preferably a liquid settable, anaerobic sealant with a low viscosity in the range of 2cps to 200cps. The windings 4 of the electrofusion sleeve 3 may be a metal such as copper, which is suitable to act as an activator for accelerating the rate of curing of the sealant. An activator such as organo-copper or organo-cobalt may also be added to the sealant prior to its injection into the joint. The sealant is preferably injected into the joint through a drilled injection port in the sleeve 3 which may be fitted with a nipple 7 which is releasably attachable to an injecting gun. |
