Tubular assembly including insulated conduits and couplers for the transfer of high temperature and high pressure fluid

Abstract From the Canadian patent

A tubular pipe assembly for hot or cold fluid transfer which assembly includes a plurality of insulated conduit sections joined together, end to end with male and, female couplings. Each conduit section has concentric inner and outer pipes with insulation disposed between the pipes. The outer pipes have threaded ends. A means at both ends of each conduit section seals the cavity between the inner and outer pipes and supports the pipes relative to each other. A male coupling has a first end threaded on the outer pipe of a first conduit section and has a second end which is threaded. A female coupling has a first and a second threaded end. The first threaded end of the female coupling is …