FIELD: transport, pipes.
SUBSTANCE: plug is welded to the smaller diameter pipe end face, the plug diameter being smaller than the larger-diameter pipe ID. A plug is fitted at a certain distance from the smaller-diameter pipe end face. Now the smaller-diameter pipe end is inserted into the larger-diameter pipe and the aforesaid plug is welded to the pipe end face. The assembly and welding over, a concrete, for example, an expanding concrete, is fed through the plug hole into annular space between the pipes in the lap zone.
EFFECT: reduced labour input of welding jobs and higher assembly rigidity.
4 dwg
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