Pipe union with both pre-load dependent and independent seals

Details Pipe union with both pre-load dependent and independent seals Pipe union with both pre-load dependent and independent seals

1979-10-31

1981-09-08

Arola, Dave W.

Pipe joints or couplings

With casing, lining or protector

Lined

285 24, 285 93, 285351, 285363, 285368, F16L 914

Patent

active

042881056

ABSTRACT:
A disconnectable union for fluid piping is provided in which a pre-load dependent first seal between disassemblable union members is coaxially related to a second seal operable independently of the pre-loading of the first seal such that the second seal independently contains any fluid that comes in contact with it even if such fluid contact is due to diminution of the pre-loading of the first seal. Various flange joint configurations and seal constructions are disclosed for both plastic lined and unlined metal pipe.

REFERENCES:
patent: 773046 (1904-10-01), Bayles
patent: 2352583 (1944-06-01), Zetterquist
patent: 2479104 (1949-08-01), Dreyer
patent: 2739828 (1956-03-01), Schindler et al.
patent: 3204989 (1965-09-01), Wilson
patent: 3253841 (1966-05-01), Ahmud
patent: 3284107 (1966-11-01), West
patent: 3552776 (1971-01-01), Leymann
patent: 3603616 (1971-09-01), Smith
patent: 4127287 (1978-11-01), Davies
Toxicology and Process Design Walter R. Payne, Chemical Engineering, Apr. 24, 1978, pp. 83-85.

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