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Title: Boltless flange

A boltless, reusable flange system for joining metal piping includes a circular, wedge-shaped tongue on an upper flange for mating with a groove containing a fusible alloy in a lower flange. The lower flange includes a heating element for melting the fusible alloy, and a thermocouple device to sense the alloy temperature. Heat can be controlled and supplied from a remote source and monitored by a remote temperature indicator. The upper flange is positioned above the lower flange, tongue and groove aligned, and the lower flange is heated until the fusible alloy melts to allow the upper tongue to settle down within the lower groove. Upon removal of the heat, the alloy hardens to further bring the two flanges together in a solid and sealed couple, compressing an optional gasket.
  1. (Blackfoot, ID)
Issue Date:
OSTI Identifier:
Lockheed Idaho Technologies Company (Idaho Falls, ID) INEEL
Patent Number(s):
US 5620208
Contract Number:
Research Org:
Country of Publication:
United States
boltless; flange; reusable; joining; metal; piping; circular; wedge-shaped; tongue; upper; mating; groove; containing; fusible; alloy; heating; element; melting; thermocouple; device; sense; temperature; heat; controlled; supplied; remote; source; monitored; indicator; positioned; aligned; heated; melts; allow; settle; removal; hardens; bring; flanges; solid; sealed; couple; compressing; optional; gasket; heating element; remote source; temperature indicator; joining metal; upper flange; thermocouple device; alloy melt; remote temperature; /285/27/228/