MIL --- PRF --- 51526B
Publication Threshold Limit Values and Biological Exposure Indices
(Copies are available from ACGIH, 1330 Kemper Meadow Dr., Suite 600, Cincinnati, OH
45240 or https://www.acgih.org.)
AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)
ASTM B 209 Standard Specification for Aluminum and Aluminum Alloy Sheet
and Plate
(Copies are available from www.astm.org or ASTM International, 100 Barr Harbor Drive,
West Conshohocken, PA 19428 --- 2959.)
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)
ISO 12103 --- 1 Road Vehicles --- Test Dust for Filter Evaluation --- Part 1
SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)
SAE J726 Air Cleaner Test Code
UNDERWRITERS LABORATORY, INC (UL)
UL900 Air Filter Units --- Standard for Safety
(Copies are available from Global Engineering Documents, 15 Inverness Way East, Engle-
wood, CO 80112 --- 5704.) (https://global.ihs.com)
2.4 Order of precedence. In the event of conflict between the text of this document and the
references cited herein, the text of this document takes precedence. Nothing in this docu-
ment, however, supersedes applicable laws and regulations unless a specific exemption has
been obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article in-
spections in accordance with 4.2.
3.2 Interface requirements.
3.2.1 Size and shape. Each particulate filter shall be cylindrical in form. It shall fit inside
the gas filter (MIL --- PRF --- 51525) and be removed without damage to itself or the gas filter.
The filter shall conform to the interface dimensions in Figure 1. Each end of the filter or end
cover shall contain one groove for gasket location. The gasket shall be grade number 2C1 of
ASTM D 1056 or silicone rubber per SAE --- AMS --- 3195, be seamless, and have a thickness of
0.31 inch. The gasket shall be permanently attached to the filter with an adhesive.
3
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