10 Questions
What is the recommended frequency for checking desiccant trays?
Bi-weekly
When should the boiler chemistry be adjusted in wet layup?
During boiler operation
What should be done prior to placing the boiler under wet layup?
Draining and cleaning the boiler
How should the boiler pressure be maintained during the layup period?
With a head tank
At what concentration should the sodium sulfite be adjusted for wet layup?
200 ppm
What is the most critical factor for maintaining the longevity of an out-of-service steam boiler?
Proper storage
When is the dry layup method most often chosen for a steam boiler?
Shutdown in freezing conditions
What quantity of quicklime does ASME BPVC Section VII recommend for every 2.83 m3 of boiler volume when performing a dry layup?
3.2 kg
What is used to force the air through the boiler and out the steam drum during a dry layup?
Air movers
What must be done to the handholes, manholes, inspection ports, and all openings to and from the boiler during a dry layup?
They must be sealed and made leak tight
Learn about the critical aspects of properly storing and laying up out-of-service steam boilers to maintain their longevity. Understand the different methods of layup and how the expected duration and purpose of layup determine the appropriate method.
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