Logo

ASTM F312-97

Historical Revision

Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters

$73.00

$73.00

$131.40


Sub Total (1 Item(s))

$ 0.00

Estimated Shipping

$ 0.00

Total (Pre-Tax)

$ 0.00


...

1.1 These methods cover the determination of the size distribution and quantity of particulate matter contamination from aerospace fluids isolated on a membrane filter. The microscopical techniques described may also be applied to other properly prepared samples of small particles. Two methods are described for sizing particles as follows:

1.1.1 Method A -Particle sizes are measured as the diameter of a circle whose area is equal to the projected area of the particle.

1.1.2 Method B -Particle sizes are measured by their longest dimension.

1.2 The test methods are intended for application to particle contamination determination of aerospace fluids, gases, surfaces, and environments.

1.3 These methods do not provide for sizing particles smaller than 5 [mu]m.

Note 1-Results of these methods are subject to variables inherent in any statistical method. The use of these methods as a standard for initially establishing limits should be avoided unless ample tolerances are permissible.


SDO ASTM: ASTM International
Document Number F312
Publication Date Jan. 1, 1997
Language en - English
Page Count 3
Revision Level 97
Supercedes
Committee E21.05
Publish Date Document Id Type View
Nov. 1, 2008 F0312-08 Revision
Jan. 1, 1997 F0312-97 Revision
Sept. 1, 2023 F0312-08R23 Reaffirmation
Oct. 1, 2016 F0312-08R16 Reaffirmation
April 10, 1997 F0312-97R03 Reaffirmation