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.

  • Line Size: 3/4″
  • Design Pressure: 10 BAR
  • Operating Pressure: 4.5 BAR
  • Design Temperature: 215°C
  • Operating Temperature: 150°C
  • Material: SA-333 Gr6
  • Line Class: 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.

  • On-site repairs for maximum up-time productivity
  • Improved Safety by reducing noise & emissions
  • Equipment Integrity with international support & custom engineering

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