UFC 3-240-13FN
25 May 2005
6-3.5
Boiler Feedwater Sample. Boiler feedwater samples should be collected
once per week for small boilers (less than 245 kilowatts [25 horsepower]), at least 2
times per week for medium boilers (245 to 1470 kilowatts [25 to 150 horsepower]), and
daily for large boilers (greater than 1470 kilowatts [150 horsepower]). The samples
should be tested for M alkalinity, conductivity, and calcium hardness.
6-3.6
Condensate Water Sample. Condensate water samples should be
collected once per week for small boilers (less than 245 kilowatts [25 horsepower]), at
least 2 times a week for medium boilers (245 to 1470 kilowatts [25 to 150 horsepower]),
and daily for large boilers (greater than 1470 kilowatts [150 horsepower]). The samples
should be tested for pH and conductivity. If the conductivity is greater than 35
micromhos, the sample should be tested for calcium hardness. If applicable based on
the metallurgy of the system, the condensate samples should be tested for iron and
copper on a quarterly basis.
6-3.7
Boiler Blowdown Water Sample. Boiler blowdown water samples should
be collected for small boilers (less than 245 kilowatts [25 horsepower]) once per week,
for medium boilers (245 to 1470 kilowatts [25 to 150 horsepower]) at least 2 times per
week, and for large boilers (greater than 1470 kilowatts [150 horsepower]) daily. The
samples should be tested for hydroxyl (OH) alkalinity (causticity), neutralized
conductivity, scale treatment chemicals (e.g., orthophosphate), and sulfite.
6-3.8
Boiler Water QA Analysis. The components of a boiler water QA
program are described in paragraph 1-1.10.1. Appropriate boiler water sampling
requirements are described below.
Each operating boiler plant equipped with hot water or steam boilers and
having one or more boilers of 980 kilowatts (3.3 million BTU per hour or
100 horsepower) or greater capacity may submit a boiler water sample for
QA once per month to an independent QA laboratory or to the contractor
providing the service to the military. These QA contractors are
independent experts in the field of boiler and cooling water treatment and
interpretation of sample analysis data.
Each operating boiler plant equipped with hot water or steam boilers of
less than 980 kilowatts (100 horsepower) capacity submits a boiler water
sample for QA once every 3 months to an independent QA laboratory or to
the contractor providing the service to the military.
For all high-pressure (greater than
103 kilopascals [15 pounds per square inch gauge]) boilers and for low-
pressure boilers treated with caustic, phosphate, tannin, and sodium
sulfite, the boiler water sample size is a 1-liter plastic bottle, or as required
by the QA laboratory.
For low-pressure boilers (less than
103 kilopascals [15 pounds per square inch gauge]) treated only with
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