Click here to go back to the Services menu  
  Boiler & Pressure Vessel Repairs | Coded Welding | Valve Repair & Supply | Pipework & Fabrication | Tubeplate Cracking
Tubeplate Thinning | Boiler Prep for Annual Survey | Burners / Refractory and Boiler Cleaning | Boiler Hire | Free Technical Assistance Helpline
TubePlate Cracking  
C.H.Thompson Ltd. TubePlate Cracking - Boiler Repairs
ABOVE: Smoke tube ends projecting into the boiler combustion chamber. This type of attachment is vulnerable to overheating and subsequent failure.

ABOVE: Tube end failure is reduced considerably by removing the projections and maching a "J" type weld preparation around the tube ends to a depth of the tube wall thickness plus 3mm as detailed in B.S. 2790.
LEFT: The tubes are then welded flush in a minimum of 2 runs using the overlay method, thus reducing the risk of porosity. On completion of welding, the tubes are lightly re-expanded; all excess weld metal is removed, a small radius is machined on the tube bore and a dye penetrant check carried out.
  © 2011 CH Thompson