Boiler Boil Out

• Alkaline boil-out product containing caustic, chelating agents, dispersant, surfactant, and an embrittlement inhibitor.
• Use 1 to 4 gallons per 100 gallons of fresh water.

What is the purpose of precleaning a boiler?
Prior to putting a new boiler into service or returning one to service after it has been repaired and/or contaminated with oil or grease, it must be boiled out to remove these contaminants. If not done, operational problems such as foaming and priming, reduction of boiler efficiency and in severe cases, tube failures may occur. In many cases, boil out procedures are described in the operating manuals for the particular boiler. However, where they are not, the general procedure described below will suffice.

Do do we prepare for cleaning?
Prior to any cleaning operation, the boiler should be opened and inspected to determine the cleanliness of internal surfaces and to insure that any rags, tools, etc. inadvertently left by workmen have been removed. Temporary gauge glasses should be installed and then all bottom drains should be closed and handhole or manhole covers replaced (except where a top opening is to be used for adding the cleaning chemicals and filling the unit). The steam valve from the unit must be closed and the vent(s) opened.

What is the cleaning procedure?
Once the unit is prepared, the prescribed cleaning chemicals should be added and the boiler filled with water to the top of the gauge glass. Where dry chemicals are used, they must be dissolved in a mixing tank prior to addition to the unit. The boiler should then be fired on low fire to obtain mixing and circulation. When steam is flowing freely from the vent(s), they are then closed and the pressure raised to 50% of the operating pressure (except for boilers operated at 15 psig or lower where the pressure may be raised to operating pressure). The pressure should then be maintained for 12-36 hours and during this period, the boiler should be blown down from the bottom by one-half of the gauge glass every two hours, refilling to the top of the glass after each blowdown. After the boil out procedure is completed, the boiler should be carefully cooled. When sufficiently cool, the vent(s) may the be opened and the unit drained and thoroughly flushed with a high-pressure hose. After flushing, it should then be carefully inspected to insure the cleaning has been complete. Where severe deposits existed initially, it may be necessary to repeat the boil out to obtain proper results. The boiler should then be closed and put in service or placed in wet or dry lay-up. Lay-up should be done according to proper procedures when the unit is to be stored for any appreciable period of time.

What chemical should I use?
ChemWorld product for this application is Q-ALK BC, a proprietary formulation specifically recommended for boil-out of boilers. Q-ALK BC contains a mixture of surfactants, caustic, phosphate, chelating agents (for mill scale removal), and an embrittlement inhibitor. For additional use instructions for this product, please refer to the Q-ALK BC product data sheet.

This product is manufactured to order per ISO specifications.

Lead time on production is 4 to 7 days. Product ships from our Virginia manufacturing partner.

Since the product is manufactured to order, we can not provide expedited orders.

See transit times map below: