ASTM D923-97

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Designation:D 923–97
Standard Practices for
1
Sampling Electrical Insulating Liquids
This standard is issued under the fixed designation D 923; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in 1.5, 1.7, 14.2, Section 17, 19.2,
1.1 These practices cover sampling of new electrical insu-
and 21.2.3.
lating liquids including oils, askarels, silicones, and synthetic
liquids as well as such liquids in service or subsequent to
2. Referenced Documents
service in cables, transformers, circuit breakers, and other
2.1 ASTM Standards:
electrical apparatus. These practices apply to liquids having a
2
-4 2 D901 Methods of Testing Askarels
viscosity of less than 6.476 3 10 m /s (540 cSt) at 40°C
D 1933 Specification for Nitrogen Gas as an Electrical
(100°F).
2
Insulating Material
1.2 ThevaluesstatedinSIunitsareregardedasthestandard
D 3613 Test Methods of Sampling Electrical Insulating Oils
where applicable. Inch pound units are used where there is no
2
for Gas Analysis and Determination of Water Content
SI equivalent.
D 4057 Practice for Manual Sampling of Petroleum and
1.3 Sampling procedures using syringe-type devices, tin
3
Petroleum Products
platedsteelcanswithflexiblesidesandstainlesssteelcylinders
2.2 IEEE Standards:
are described in Test Methods D 3613. This method describes
799-1992 Guide for Handling and Disposal of Transformer
preferred techniques to use when sampling for dissolved gas
4
Grade Insulating Fluids Containing PCBs
analysis and water content in insulating fluid.
1.4 The procedures appear in the following order:
3. Terminology
Procedure Section/Paragraph
3.1 Definition:
Dip-Type Device (drum thief) 6.2, 13, and A1.1
3.1.1 sampling—the obtaining of that amount of a material
Pressure-Type Device 6.3, 14, and A1.2
which is adequate for making the required tests and which is
Tank Car-Type Device 6.4, 15, and A1.3
representative of that portion of the material from which it is
Manifold-Type Device 6.5, 21, and A1.4
Electric Equipment Sampling Outlet or Valve 6.6 and 18
taken.
3.1.1.1 Discussion—In most cases the detection of contami-
1.5 These practices involve close contact with the electrical
nants that are not ordinarily dispersed uniformly through the
insulating liquids being sampled as well as liquids and other
liquid being sampled, such as water or solid particles, neces-
materials used to clean the sampling tools and devices. Proper
sitates taking samples at specific locations where the contami-
use of personal protective equipment (PPE) is suggested.
nants are likely to be found. For a liquid having a relative
1.6 Handle askarels as outlined in IEEE 799-1992 to avoid
density (specific gravity) less than one, water and some other
environmental contamination. For methods of testing askarels
impurities are most likely to be found on the bottom, whereas
see Methods D 901.
in the case of a liquid having a specific gravity greater than
1.7 Properly contain, package and dispose of any liquid or
one,someoftheseimpuritiesaremostlikelytobefoundonthe
material resulting from the use of these practices in a manner
surface.
that is in accordance with local, state and federal regulations.
1.8 This standard does not purport to address all of the
4. Summary of Practice
safety concerns, if any, associated with its use. It is the
4.1 Representative samples of electrical insulating liquids
responsibility of the user of this standard to establish appro-
aretakenfortestspecimenssothatthequalitypertinenttotheir
priate safety and health practices and determine the applica-
use may be determined. The quality in different portions of a
1
This test method is under the jurisdiction of ASTM Committee D-27 on
Electrical Insulating Liquids and Gasesand is the direct responsibility of Subcom-
2
mittee D27.07on Physical Tests. Annual Book of ASTM Standards, Vol 10.03.
3
Current edition approved Oct. 10, 1997. Published February 1998. Originally Annual Book of ASTM Standards, Vol 05.02.
e1 4
published as D 923 – 47 T. Last previous edition D 923 – 91 . Available from the IEEE, 345 E. 47th St., NY, NY 10017-2394.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 923
given container, or the average quality of the whole bulk may
be ascertained if desired.
5. Significance and Use
5.1 Accurate sampling, whether of the complete
...