3/4″ T-Piece Clamp with Strongback
Problem Summary
Anomaly Description:
A steam leak was discovered from the welding area on the T-Piece.
Root causes:
The leak was caused by a crack on the welding. The pipe was also reported to have an extremely low remaining wall thickness (through-wall).
Integrity concerns:
The pipe was in a critical condition with measurements at the lowest remaining wall thickness (through-wall).
Due to the remaining wall thickness (through-wall), the pipe could suddenly rupture/fail anytime and therefore the integrity of the piping was a major concern.
Technical Details
Design Pressure:
Operating Pressure:
Design Temperature:
Operating Temperature:
Material:
Line Class:
10 BAR
4.5 BAR
215°C
150°C
SA-333 Gr6
150
The Beruseal Solution
Clamp Design:
A T-piece clamp was designed according to ASME VIII Div 1 to cover the entire T-piece pipe section including the cracked welding. A strongback system was designed to keep the clamp in place should there be a complete failure of the cracked weld. The strongback system also adds structural integrity to the piping since the remaining wall thickness is extremely thin (below minimum acceptable thickness).
Seal:
A successful seal was obtained by injecting a polymer compound into a sealing groove that runs throughout the seam and bores of the enclosure.
Get in touch with Beruseal
- On-site repairs for maximum up-time productivity
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- Equipment Integrity with international support & custom engineering
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