Separator Material.

DOE-STD-3020-97

cadmium is no longer acceptable for treatment of filter

cases, nor is asbestos acceptable as a HEPA filter

component.

5.3.3

Separator Material.

5.3.3.1 Asbestos. Asbestos is not authorized as a separator

material. (See Section 5.3.2.3, above.)

5.3.3.2 Aluminum. Authorized aluminum separator materials are

specified in ASTM B209 as Alloy 1145-H18, Alloy 3003-H19,

or Alloy 5052-H38. These separators must have a minimum

thickness of 0.00015 in. (0.038 mm). To protect the filter

medium, the separator shall be provided with a "turned edge"

prior to corrugation.

5.3.3.3 Acid Resistant Separators. Authorized coatings for acid

resistant separators are Teflon, epoxy resin or thermoset

vinyl. The coating shall be colored (to identify defects), shall

tightly adhere to preclude cracking or delaminating when the

material is corrugated, and shall be 0.0001 to 0.0002 in. (2.5

to 5 micrometers) thick (dry film). After corrugation and

subsequent flattening, the coating shall exhibit an adhesive

peel resistance of 3A or better when tested in accordance

with Method A of ASTM D 3359.

Adhesives. Adhesives and sealants, used to seal the filter pack within

5.3.4

the filter case and to adhere gaskets to the filter case, shall be non-

flammable or self-extinguishing, so that when the dried or cured

sealant is subjected to the Spot Flame test of UL-586, it either will not

burn, or will not continue to support combustion after the source of

combustion has been removed.