ASTM E1260-03(2009)
(Test Method)Standard Test Method for Determining Liquid Drop Size Characteristics in a Spray Using Optical Nonimaging Light-Scattering Instruments
Standard Test Method for Determining Liquid Drop Size Characteristics in a Spray Using Optical Nonimaging Light-Scattering Instruments
SIGNIFICANCE AND USE
The purpose of this test method is to provide data on liquid drop-size characteristics for sprays, as indicated by optical nonimaging light-scattering instruments. The results obtained generally will be statistical in nature. The number of variables concerned in the production of liquid spray, together with the variety of optical, electronic, and sampling systems used in different instruments, may contribute to variations in the test results. Care must be exercised, therefore, when attempting to compare data from samples obtained by different means.
SCOPE
1.1 The purpose of this test method is to obtain data which characterize the sizes of liquid particles or drops such as are produced by a spray nozzle or similar device under specified conditions using a specified liquid. The drops will generally be in the size range from 5-μm to the order of 1 000-μm diameter; they will occur in sprays which may be as small as a few cubic centimetres or as large as several cubic metres. Typically the number density of the particles can vary significantly from one point to another.
1.2 This test method is intended primarily for use in standardizing measurements of the performance of sprayproducing devices. It is limited to those techniques and instruments that operate by passing a beam of light through the spray and analyzing the light scattered by the droplets to derive size information. Such techniques do not produce images of individual drops, and therefore, are known as “optical (nonimaging) instruments.”
1.3 The measurements made, when referred to the entire spray being sampled, may be flux sensitive or spatial, as defined in Practice E799, depending on the techniques used with a particular instrument.
1.4 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.
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Designation: E1260 − 03(Reapproved 2009)
Standard Test Method for
Determining Liquid Drop Size Characteristics in a Spray
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Using Optical Nonimaging Light-Scattering Instruments
This standard is issued under the fixed designation E1260; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This standard is one of several describing a different class of test methods for determining liquid
drop size characteristics in a spray. These test methods can be broadly distinguished as “optical” or“
non-optical.” In the optical category there are test methods that essentially make images (such as
photographs) of drops that can be measured either manually or automatically, and test methods that
do not make images but use optical phenomena exhibited by single drops or ensembles of drops which
can be recorded and used to calculate either individual drop sizes or the distribution of drop sizes in
anensemble.Thistestmethoddealswiththelatterclass,andhence,isdescribedas“nonimaging.”The
various optical phenomena involved are commonly described as “light-scattering.” Using any of these
test methods, the spray is observed for a period of time during which a large number of drops is
examined, and the data are treated so as to derive drop-size statistics for the sample investigated.
1. Scope 1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 The purpose of this test method is to obtain data which
responsibility of the user of this standard to establish appro-
characterize the sizes of liquid particles or drops such as are
priate safety and health practices and determine the applica-
produced by a spray nozzle or similar device under specified
bility of regulatory limitations prior to use.
conditions using a specified liquid. The drops will generally be
in the size range from 5-µm to the order of 1 000-µm diameter;
2. Referenced Documents
they will occur in sprays which may be as small as a few cubic
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2.1 ASTM Standards:
centimetres or as large as several cubic metres. Typically the
E177 Practice for Use of the Terms Precision and Bias in
number density of the particles can vary significantly from one
ASTM Test Methods
point to another.
E456 Terminology Relating to Quality and Statistics
1.2 This test method is intended primarily for use in
E799 Practice for Determining Data Criteria and Processing
standardizing measurements of the performance of spraypro-
for Liquid Drop Size Analysis
ducing devices. It is limited to those techniques and instru-
E1088 Definitions of Terms Relating to Atomizing Devices
ments that operate by passing a beam of light through the spray
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(Withdrawn 1997)
and analyzing the light scattered by the droplets to derive size
E1296 Terminology for Liquid Particle Statistics (With-
information. Such techniques do not produce images of indi-
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drawn 1997)
vidual drops, and therefore, are known as “optical (nonimag-
E1620 Terminology Relating to Liquid Particles andAtomi-
ing) instruments.”
zation
1.3 The measurements made, when referred to the entire
2.2 NFPA Standards:
spray being sampled, may be flux sensitive or spatial, as
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NFPA 30 Flammable and Combustible Liquids Code
defined in Practice E799, depending on the techniques used
with a particular instrument.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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This test method is under the jurisdiction ofASTM Committee E29 on Particle Standards volume information, refer to the standard’s Document Summary page on
and Spray Characterization and is the direct responsibility of Subcommittee E29.02 the ASTM website.
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on Non-Sieving Methods. The last approved version of this historical standard is referenced on
Current edition approved Nov. 1, 2009. Published February 2010. Originally www.astm.org.
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approved in 1988. Last previous edition approved in 2003 as E1260 – 03. DOI: Available from National Fire Protection Association (NFPA), 1 Batterymarch
10.1520/E1260-03R09. Park, Quincy, MA 02169-7471, http://www.nfpa.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E1260 − 03 (2009)
NFPA33 SprayApplication Using Flammable and Combus- 6.1.2 It is very important to protect the edges of the
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tible Materials discharge orifice of a spray nozzle from accidental damage
prior to testing.This protection is best accomplished by the use
3. Terminology of a cover over the
...
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