Weld repair proves crucial to staying on the critical path
Thanks to our engineer’s eagle eye and our ability to weld-repair L-0 blades, we saved the customer a tremendous amount of money and kept the major outage on schedule.
Had the crack on the L-0 blade tip not been picked up, it would most likely have continued to propagate all the way to the rivet hole, leading to vibration issues or even catastrophic failure. With imbalance, there would have been a high risk of the unit crashing.
It’s likely the turbine would have been out of operation for at least three weeks. But, potentially, it could have been down for as long as six months – at a production loss of around $750,000 a day.
On top of that, we saved the client the additional repair and capital expenditure costs.
This was an extraordinary and highly valuable identification by our application engineer. In addition, our team also spotted shroud lifting on the L-2 blades that was no more than around 40-thousandths of an inch.
Because the lifting was on the closing blades, which were made out of titanium, we were unable to carry out a weld repair. But by replacing two groups of blades, we effectively wound the lifecycle back to zero hours again on those two groups.
Yet further evidence that having an eagle eye on site makes all the difference.