Operating the generator with 18 % Mn 5 % Cr Retaining Ring
Operating the generator with 18 % Mn 5 % Cr Retaining Ring
(OP)
Dear all,
Our Power Plant (Combined Cycle Power Plant) was built in 1990's. The material composition of the generator retaining ring is 18 % Mn 5 % Cr. We also have been informed, that several 18 % Mn 5 % Cr Retaining ring failure were cauded by stress corossion cracking. My question is, is it safe for us to operate these generators?
Our Power Plant (Combined Cycle Power Plant) was built in 1990's. The material composition of the generator retaining ring is 18 % Mn 5 % Cr. We also have been informed, that several 18 % Mn 5 % Cr Retaining ring failure were cauded by stress corossion cracking. My question is, is it safe for us to operate these generators?





RE: Operating the generator with 18 % Mn 5 % Cr Retaining Ring
Can you protect the part from corrosion?
What corrosive substances were present at the reported failures?
Are they present at your location?
Mike Halloran
Pembroke Pines, FL, USA
RE: Operating the generator with 18 % Mn 5 % Cr Retaining Ring
RE: Operating the generator with 18 % Mn 5 % Cr Retaining Ring
http://site.ge-energy.com/prod_serv/products/tech_...
RE: Operating the generator with 18 % Mn 5 % Cr Retaining Ring
Is this an air cooled generator, or hydrogen cooled (or otherwise)?
Are you located in a marine environment or an evironment where chlorides may be present in the air?
Does the plant operate continuously or is it off line for any amount of appreciable time?
The answers to the above questions will determine any "tips" I might have to offer.
rmw
RE: Operating the generator with 18 % Mn 5 % Cr Retaining Ring
Dear rmw, Our Toshiba Generators are:
1. They are hydrogen cooled generator
2. Our Power Plant is located near the sea. But, we haven't check the chloride content of the ambient air.
3. Our Steam plant operate continuously. Used as base load.
4. It consists of 4 Generators. 2 x 100 MW and 2 x 200 MW.
Thanks a lot