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DOE-STD-3020-2005
TABLE 5.4
AXIAL FLOW CIRCULAR HEPA FILTERS NOMINAL RATINGS
(Note 1)
Maximum Rated Air Flow
Maximum Resistance
(Note 2)
(m3/hr)
(ACFM)
In wg
Pa
20
34
1.0
250
35
60
1.0
250
100
170
1.0
250
Notes:
1. Reprinted from ASME AG-1, by permission of the American Society of Mechanical
Engineers. All rights reserved.
2. Rated airflow in ACFM is based on tests performed indoors at atmospheric pressure
close to sea level. The temperature and pressure under which the tests have been
conducted are to be recorded but are not to be used to correct rated flow.
5.5.1
Enclosed Filters : Filters with inlet and/or outlet connections as shown in
Table 5.5 are commonly referred to as enclosed filters or encapsulated
(nipple-connected, closed face, or self-contained) HEPA filters. These filters
are not qualified in accordance with ASME AG-1 and fail to meet all the
requirements contained in this standard. When designing and constructing
new nuclear facilities, enclosed HEPA filters shall not be used in nuclear
ventilation systems or in habitability systems where HEPA filters are used to
protect workers.
14


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