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DOE-STD-3020-2005
5.4.2.3
Media Velocity (Effective Media Area): The total effective
media area provided within the filter pack shall be such that average
face velocity (rated airflow divided by the effective filter media area)
shall not exceed 5.0 ft/min (1.52 m/min) at the rated airflow.
5.4.3
Filter Case: The case shall be fabricated in accordance with the provisions
of Section 5.3.2. The completed case, less gaskets, shall conform to the
dimensions listed in Table 5.1, unless alternative dimensions are specified in
procurement documents. Table 5.2 lists the acceptable tolerances.
TABLE 5.2
TOLERANCES FOR ASME AG-1, FILTER CASES
-1/16 in. / +0 in. (-1.6 mm / +0 mm)
Face Dimensions less than 24 in. (610 mm)
-1/8 in. / +0 in. (-3 mm / +0 mm)
Face Dimensions 24 in. (610 mm) and greater
+1/16 in. / -0 in. (+1.6 mm / -0 mm)
Depth
/4 in. 1/16 in. (19 mm 1.6 mm)
3
Width of Gasket Surface
Squareness for Filter Face Dimensions
Face diagonals to be equal with the following
tolerance: + 1/8 in. (3 mm) total
+ 1/16 in. (1.6 mm) total allowance when
Gasket Sealing Surfaces - Flat and parallel
measured with one face of the filter resting on
a flat surface
Square with sides of case (within 3)
5.4.3.1
Wooden Cases: Case panels shall be joined with rabetted joints
which are assembled by gluing with an adhesive meeting the
requirements of Section 5.3.4 and assembled using fasteners that
comply with Section 5.4.3.3. The end points of the fasteners shall
not penetrate the inside or outside surfaces of the case. Faces,
edges, and inner surfaces of the case shall be thoroughly coated
with sealant to minimize permeability. Case face sealant shall not
reduce the ability of the gasket to adhere to the case. There shall
be no rough edges that might penetrate or cut workers' gloves or
injure the fingers of personnel handling the filters.
10


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