| 摘要 |
A method of forming a pipe joint, which pipe joint is of the kind in which an external peripheral flange is provided on the pipe and a nut or other retaining device encircles the pipe so as to abut the flange (or a member in engagement therewith), which nut or retaining device can be engaged with a threaded or other suitably shaped part of the fitting to which the pipe is to be joined in such manner that the flange is trapped between the nut or retaining device and part of the fitting. The method comprises forming the flange as an annular element which is expanded by heating and is then shrunk on to the pipe. The inner periphery of the annular element and the outer periphery of the pipe are formed with inter-engaging projections and recesses.
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