Most companies focus on improving efficiency while the boiler is running to lower expenses and maximize profits. What about when the boiler isn’t running!? There may be circumstances where a boiler may not be required for extended periods of time, such as seasonal boiler requirements or redundant boilers that may only be required in extenuating circumstances. These offline periods can damage the boiler, decreasing its useful life and increasing maintenance and repair costs. With proper planning and preparation, a boiler can be safely taken offline with a procedure known as a boiler layup.
There are two main types of boiler layup to consider:
When performed properly, both procedures are equally effective in protecting your boiler while offline and increasing its useful life. However, there are advantages and disadvantages that should be weighed during the decision-making process. Things to consider include:
There may not be an obvious choice when selecting the layup procedure that is best for your specific situation. Your water treatment professional can assist in this process.
A wet lay-up typically requires isolating the boiler from the steam system, ensuring the burner remains offline, and chemically treating the water to protect the metal surfaces.
The key advantage to a wet layup is the ability to fire online within short notice as the boiler is already filled with water. Additionally, since the water in the boiler is treated water, there is sufficient protection during the start-up of the boiler as well.
The compromise is that this method involves some treatment costs and additional monitoring compared to a dry layup procedure.
Typical wet layup procedure:
A dry layup procedure involves the complete removal of the water. Since water or moisture is a required medium for corrosion to take place, boiler corrosion is prevented through the complete removal of the water and the atmospheric moisture.
The key advantage to dry layup is that you can set it and forget it. Compared to wet layup, there are no chemical, equipment or fuel costs. Once a dry layup is completed, the boiler only needs to be checked occasionally to ensure moisture is not getting back into the boiler.
The compromise is that this procedure may not be suitable should the system be required to be put back online on short notice or needs to remain in a standby state.
Typical dry layup procedure:
Offline periods can damage your boiler, decreasing its useful life and increasing maintenance and repair costs. With proper planning and preparation, a boiler can be safely taken offline with a procedure known as a boiler layup. When performed properly, both wet layup and dry layup are equally effective in protecting your boiler while offline and increasing its useful life. However, there are advantages and disadvantages that should be weighed during the decision-making process.
With your boilers now safely offline in proper layup state, you can go back to focusing on how to reduce operating costs when your boiler is brought back online by reading some of our related blogs!
Trade Expo / 05.14.19
Meet DuBois Technical Representatives at BOOTH# 5449, May 14-16 at EASTEC, to help shape your business at the East Coast’s premier manufacturing event. We will feature our leading our leading metalworking fluids, process cleaners, rust preventatives, paint pretreatment and water treatment solutions for cooling, boilers and wastewater.
Recent Events / 10.02.18
The acquisition of the Water Treatment Solutions division of Triwater Holdings LLC, and its Klenzoid, Eldon Water, Chemco Products and Nashville Chemical brands, expands DuBois position in Canada and enhances our solutions for the institutional, light industrial, food and beverage and natural resources markets.
Recent Events / 04.22.19
St. Joseph Mercy Oakland and Eldon Water, a recent acquisition of DuBois Chemicals, implemented a program to save a projected 665,000 gallons of water annually. For Earth Day this year, the hospital was awarded a $10,000 check by Eldon for being a sustainability leader.
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