Large-diameter insulated pipe

Details Large-diameter insulated pipe Large-diameter insulated pipe

1977-09-27

1978-09-19

Bell, Jr., Houston S.

Pipes and tubular conduits

Combined

With end structure

138173, 277DIG2, 285149, F16L 1108

Patent

active

041146573

ABSTRACT:
The insulated pipe comprises an inner pipe and a foam of thermally insulating plastics material which adheres to the inner pipe and to an outer protective layer. The foam material covers the major part of the inner pipe but terminates at a distance from each end thereof in a portion having an inclined surface of frustoconical shape. The outer protective layer comprises a cover which is relatively rigid and terminates before reaching each frustoconical surface and a protective case for each frustoconical surface of the foam material. The case is at one end fixed to the cover and at the other end integral with the inner pipe. The case has sufficient elasticity to allow the foam to follow the expansion of the inner pipe while the cover remains immobilized.

REFERENCES:
patent: 3508768 (1970-04-01), Hogan

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