Remove covers and prepare vessel for work. Staging, remove plugs from tubes, etc.
Cut the tubes behind the sheet at one end of the condenser,
If there is a tube sheet coating, the coating in the area of the retubing must be removed first.
Pulte ube on the cpposite end, Is pulled about 4 nhs rom the fac of the ube sheet with the
pulling system, than the whole tube is pulled manually
Pull the stubs from the tube sheets left in place from the first Ses.
After all tubes and stubs are removed, the tube sheet and boreholes are checked for damages.
The new tubes are plugged through the tube sheets and baffles.
Rolling in of the new tubes.
Facing the overhang For coating a overhang of 2mm is necessary
without coating the tube ends will be even to the tube sheet
Performing a static pressure test on the shell side, while keeping the covers open, is conducted to detect potential leaks in the newly installed tubes.
Repair of casting if necessary Bore sandblasting tubes have to be protected with special sandblast lugs. Then cleaning and setting of the special coating plugs. The process involves applying the primecoat, followed by the thick layer, grinding, applying the final layer, and then removing the plugs.
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