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Analysis
of Contact Stresses on 3-Bolt Connection Sealing Surfaces Using
Self-Energized Tapered Seal |
Time: |
Room C |
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Rajeev Madazhy,
Engineering Manager - TaperLok This presentation discusses a novel design using 3 bolts
for a self-energized seal connector is proposed for quick assembly
applications. The connector uses
self-energized patented seal technology.
The seal ring has converging double-tapered angle geometry. The
10˚ and 20˚ angle design is driven by the basic wedge
principle. The seal ring wedges itself
between the male nose and female pocket due to the tapered angles and the
studs push the surfaces against each other.
The “doorstop” effect is enhanced as internal pressure builds up
behind the seal ring and drives the wedge tighter. The connector is also designed to misalign
up to 3˚ and allow 360˚ axial pipe rotation. Contact stress distribution on the seal ring during
initial bolt-up and subsequent operating pressure is analyzed for 3” and 10”
connectors using FEA. Analysis is repeated for the
misaligned position and contact pressure distribution is qualified. Additional analysis is performed to determine
the effect of internal pressure on the seal contact area. Hydrostatic tests are carried out for the
same size bolted connectors to evaluate maximum pressure at which leak
occurs, and results compared with FEA. |
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