UFC 3-240-13FN
25 May 2005
Table 6-2. Water Sampling Frequency and Testing Requirements
for Boiler Water Systems
Total
Hydroxyl
Calcium
Copper
Ortho-
Alkalinity*
Source of Sample
pH
Alkalinity
TDS
Sulfite
and Iron
phosphate
(Causticity)
(M)
Makeup water
--
1/W
--
1/W
1/W
--
--
--
Feedwater,
small boilers
--
1/W
--
1/W
1/W
--
--
--
(< 245 kW [25 hp])
Feedwater,
medium boilers
--
2/W
--
2/W
2/W
--
--
--
(2451470 kW
[25-150 hp])
Feedwater,
large boilers
--
1/D
--
1/D
1/D
--
--
--
(> 1470 kW [150 hp])
Boiler water,
1/W
--
1/W
--
1/W
--
1/W
1/W
small boilers
Boiler water,
2/W
--
2/W
--
2/W
--
2/W
2/W
medium boilers
Boiler water,
1/D
--
1/D
--
1/D
--
1/D
1/D
large boilers
Condensate return (small
1/W
--
--
As needed
1/W
1/Q
--
--
boilers)
Condensate return
2/W
--
--
As needed
2/W
1/Q
--
--
(medium boilers)
Condensate return (large
1/D
--
--
As needed
1/D
1/Q
--
--
boilers)
NOTES:
W = Week (for example, 1/W = once per week).
Q = Quarter (for example, 1/Q - once per 3 months).
D = Day (for example, 1/D = once per day).
* = Feedwater alkalinity only for boilers that use dealkalizers.
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