Pipe joints or couplings – For branched path – T-type
Patent
1993-07-09
1995-09-26
Nicholson, Eric K.
Pipe joints or couplings
For branched path
T-type
285138, 285179, 138113, F16L 918, F16L 3900
Patent
active
054529220
ABSTRACT:
An elbow fitting for a double-containment assembly has an inner elbow section contained within an outer elbow section, and the inner elbow section is coupled to corresponding straight sections of inner pipe and the outer elbow section is coupled to corresponding straight sections of outer pipe. The inner elbow section defines a first centerline radius of curvature or a first centerline-to-end radius, and the outer elbow section defines a second centerline radius of curvature or a second centerline-to-end radius. The first centerline radius of curvature is greater than the second centerline radius of curvature, and the first centerline-to-end radius is greater than the second centerline-to-end radius, forming an expanded outer annulus space in comparison to the inner annulus space. The annulus between the inner and outer elbow sections is unobstructed permitting movement of the inner and outer elbow sections relative to each other. The expanded outer annulus space accommodates for differential thermal expansion or contraction of the inner and outer piping components relative to each other.
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Nicholson Eric K.
Ziu Christopher G.
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