Condenser tubes of 19 metres length have successfully received this repair system. This repair technique can be used in conjunction with the Tube Sleeving System . All units suffered high turbine back pressures, with resulting loss of generating capacity. Many further suspect tubes were identified by NDT as due for plugging. The cast iron water box fasteners were badly corroded after 28 years service.
Client reticent to attempt removal of water boxes as no spares available.
Installed 14,600 Full Length Liners into the units via the man ways. Plugged tubes and all Class 3b defect tubes shown by NDT were Lined as a precaution. Full condensing capacity was restored to these condensers. All nine units now operate at design load. Payback was calculable in weeks per unit.