CleaverBrooks CB - Boil-Out of a New Unit

The Pressure Vessel
2-8
750-96 (revised 2010)
Model CB Packaged Boiler Manual
If any unwanted conditions are observed, your water consultant or water treating company should be contacted
for recommendations.
Any sludge, mud, or sediment found will have to be flushed out. The effectiveness of the blowdown practiced on
steam boilers will be verified and scheduling or frequency of blowdown may have to be revised. The need for peri-
odic draining or washout will also be indicated.
Any oil or grease present on the heating surfaces should be removed promptly by a boil-out with an alkaline deter-
gent solution.
2.6 — Boil-Out of a New Unit
The internal surfaces of a newly installed boiler may have oil, grease, or other protective coatings used in manu-
facturing. Such coatings must be removed since they lower the heat transfer rate and could cause overheating of
a tube. Before boiling out procedures may begin, the burner should be ready for firing. The operator must be
familiar with the procedure outlined under burner operation.
Your water consultant or water treatment company will be able to recommend a cleaning or boil-out procedure. In
the event such service is unavailable or is yet unscheduled, the following information may be of assistance.
There are several chemical suitable for this purpose. Soda ash (sodium carbonate) and caustic soda (sodium
hydroxide) at the rate of 3 to 5 pounds each per 1,000 pounds of water, along with a small amount of laundry
detergent added as a wetting agent is one combination often used.
Cleaver-Brooks markets a prepared alkaline-phosphate blend under the trade name of “Poly-Clean.” This is avail-
able in various container sizes from your Cleaver-Brooks Service and Parts Representative. Follow the provided
instructions for its use.
The suggested general procedure for cleaning a boiler is:
1. Refer to the chart below to determine water capacity and have sufficient cleaning material on hand.
NOTE: Temperature of initial fill of water for hydrostatic tests, boilout, or for normal operation should be as stated in
the ASME Boiler Code.
Boiler Model and
Size
Water - Gallons Water - Weight
Normal Flooded Normal Flooded
CB50
CB60
CB70
CB80
CB100
CB100A
CB1025A
375
350
550
535
610
-
-
440
420
650
630
715
595
670
3125
2920
4625
4460
5085
-
-
3665
3500
5420
5250
5960
4960
5585