Double containment pipe joint assembly

Pipe joints or couplings – For branched path – T-type

Patent

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Details

285138, F16L 3900

Patent

active

050854712

ABSTRACT:
A double containment pipe joint assembly is provided with an inner pipe and an outer or containment pipe secured to the joint assembly in concentric relation. The pipe joint assembly includes a first and second fitting coupled together to present end surfaces which can be secured to a length of a primary (inner) and containment (outer) pipe at intervals along the pipeline wherein sections of the pipeline can be removed and repaired without the necessity of removing the whole pipeline, while anchoring the pipes together at spaced locations along the pipeline. The arrangement further allows the pipes to be formed from different materials compatible with the pipe fittings and precludes the necessity of providing flanges on the inner and containment pipes so they can be secured in concentric relationship, lessening the chance for failure. One of the inner and outer fittings has two sections (either separate or cast in one piece) which are secured in mirror-image relation to a ring on the other section. One of the pipe fittings has a tubular section forming a bore therethrough for the passage of fluid from the primary or inner pipe. The other fitting either has tabs or a ring for receiving tabs coupling the fittings together to present end surfaces for securement to the inner and containment (outer) pipes.

REFERENCES:
patent: 1140633 (1915-05-01), Trugano
patent: 3275345 (1966-09-01), Waldron et al.
patent: 3693665 (1972-09-01), Veerling
patent: 3794358 (1974-02-01), Allen et al.
patent: 3865145 (1975-02-01), McKay et al.
patent: 4108476 (1978-08-01), Krupp
patent: 4111466 (1978-09-01), Derfgibus
patent: 4121858 (1978-10-01), Schulz
patent: 4423778 (1984-01-01), Goldsmith
patent: 4484771 (1984-11-01), Schulz
patent: 4573527 (1986-03-01), McDonough

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