ASTM F778-88(1993) - 1.1.2001
 
1. Scope

1.1 The flow resistance of any fabricated filter device will depend on the flow resistance of the media used.

1.2 This standard offers procedures sufficient to determine the gas flow characteristics of flat specimens of media used in the filtration process. The methods are extended to include pleated specimens and bulk media as well.

1.3 In all cases, flow rates through the specimen are determined in accordance with procedures outlined in ASME "Fluid Meters." The test fluid is air.

1.4 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 
2. Referenced Documents

D645-D645M-97

Standard Test Method for Thickness of Paper and Paperboard

D585-97

Standard Practice for Sampling and Accepting a Single Lot of Paper, Paperboard, Fiberboard, and Related Product

D461-93

Standard Test Methods for Felt (Withdrawn 2004)

D685-22

Standard Practice for Conditioning Paper and Paper Products for Testing

E105-21

Standard Guide for Probability Sampling of Materials

D3574-17

Standard Test Methods for Flexible Cellular Materials´Slab, Bonded, and Molded Urethane Foams

D2905-97

Standard Practice for Statements on Number of Specimens for Textiles

D1777-96(2019)

Standard Test Method for Thickness of Textile Materials

D1776-08

Standard Practice for Conditioning and Testing Textiles

D737-18(2023)

Standard Test Method for Air Permeability of Textile Fabrics

E122-17(2022)

Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process

“Fluid Meters,” Sixth Edition, 1971 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://www.asme.org.