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ASTM F312

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

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Organization: ASTM
Publication Date: 10 April 1997
Status: inactive
Page Count: 4
ICS Code (Aerospace fluid systems and components): 49.080
scope:

These test 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 test methods are described for sizing particles as follows:

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

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

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

These test methods do not provide for sizing particles smaller than 5 ┬Ám.

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.

This standard does not purport to address all of the safety concerns, if any, 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.

Document History

November 1, 2008
Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
These test 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...
November 1, 2008
Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
These test 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...
ASTM F312
April 10, 1997
Standard Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
These test 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...
April 10, 1997
Standard Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
1. Scope 1.1 These test methods cover the determination of the size distribution and quantity of particulate matter contamination from aerospace fluids isolated on a membrane filter. The...
January 1, 1996
Standard Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
A description is not available for this item.
October 3, 1969
STANDARD METHODS FOR MICROSCOPICAL SIZING AND COUNTING PARTICLES FROM AEROSPACE FLUIDS ON MEMBRANE FILTERS (R 1992)
A description is not available for this item.

References

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