steam turbine distorted diaphragms
steam turbine distorted diaphragms
(OP)
Has anyone out there any experience with repair of distorted (dished) diaphragms? I am trying to evaluate bids from the OEM (GE) and from TurboCare and MD&A. Based on the big difference I see in pricing from the low bidder I am concerned that they are not offering the same repair method. This is a 1968 vintage GE Lynn turbine (155 MW) reheat, double flow exhaust. One of the largest made in Lynn, MA. Any help is appreciated and I can provide more detail on the work scope if I get a response. Thanks.





RE: steam turbine distorted diaphragms
Mike Halloran
Pembroke Pines, FL, USA
RE: steam turbine distorted diaphragms
for example,
is there any partition repair included...major weld build up requiring stress relief or just dressing trailing edges
then the method for dish correction, whether jig forced while in stress oven or rosebud and hammer.
RE: steam turbine distorted diaphragms
Ask for a reference list of similar Lynn machines that they have done - not Schenectady machines, Lynn machines. I was trained on both types many years ago, and they did the same thing different ways sometimes.
While the latter two bidders have lots of experience in that type of work - probably much more on Schenectady machines than Lynn models, GE at least does somewhere have the original Lynn drawings. I suspect that they are the high price and that is because they have the brand name to protect.
And, yes, that is big for a Lynn machine.
rmw
RE: steam turbine distorted diaphragms
RE: steam turbine distorted diaphragms
RE: steam turbine distorted diaphragms
rmw