FIELD: process flows.
SUBSTANCE: pipe with filler is frosen before bending and then deformed by pipe-bending device; at that one of the filler's components is water. Upfront bending the pipe is turned to vertical position with bottom face being plugged and filled with water through top face. Then the cellular structure bar made of easily deformed material and constituting thin-wall hose of outer diameter ensuring tight but easy run of hose in the pipe and length equal to that of the pipe is submerged to the pipe. Transverse water and air permeable membranes also made of easily deformed material are installed inside the hose at specified distance; at that distance and thickness of membranes are identified depending on relative pipe bending radius. Then the pipe with filler is frosen and deformed by pipe-bending device.
EFFECT: improved quality of pipes and bending efficiency.
3 dwg
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