Table 5.4 Axial Flow Circular HEPA Filters

DOE-STD-3020-2005

TABLE 5.4

AXIAL FLOW CIRCULAR HEPA FILTERS NOMINAL RATINGS

(Note 1)

Maximum Rated Air Flow

(Note 2)

(m3/hr)

(ACFM)

In wg

1.0

250

1.0

250

100

170

1.0

250

Notes:

1. Reprinted from ASME AG-1, by permission of the American Society of Mechanical

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.