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Posted by Mike on January 23, 2006 at 21:51:59:
In Reply to: PREPARING A BOILER FOR A INTERNAL INSPECTION posted by JOHN M. KOZARUK on January 22, 2006 at 22:18:41:
Get a copy of the folloing Code Books. The NBIC Code from the National Board. The ASME Code Reccomended Care for Power Boilers. They have standards in them which you can use as a guideline. Also check ith the manufacturer of the boiler. They also will have guidelines. If you bring a boiler down off line to quickly and put it back online without allowing for proper time to warm up you risk putting additional stress on the steel and this can lead to a failure. The number one cause of boiler accidents is operator error and poor maintenance.
: AFTER MUCH CONVERSATION WITH MY FELLOW POWERPLANT ENGINEERS AND MANAGERS I FIND MYSELF ASKING IF THERE IS
: A STANDARD PROCEDURE FOR PREPARING A BOILER FOR INSPECTION.AFTER REPAIRS TO STRUCTUAL DAMAGE ON OUR
: 40,000#/HR HEAT RECOVERY BOILER I'VE RECOMMENED A LONGER COOL DOWN PERIOD AFTER THE UNIT IS TAKEN OUT OF SERVICE.MY RECOMMENDATION WAS AT LEAST A 24 HOUR COOL DOWN.PRESENTLY THEY ARE ONLY ALLOWING LESS THAN 8 HOURS.I'VE ALSO REQUESTED A LONGER WARM UP PERIOD WHEN BRINGING THE UNIT BACK ON LINE.THE BOILER RECEIVES ITS ENERGY FROM THE EXHAUST OF A GAS TURBINE USED TO DRIVE A GENERATOR.THE PLANT HAS AMPLE BOILER RESERVE TO MEET PLANT DEMANDS DURING DOWN TIME OF THE MENTIOED BOILER