ASTM D923-15

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D923 − 15
Standard Practices for
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Sampling Electrical Insulating Liquids
This standard is issued under the fixed designation D923; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
Section/
Section Title
Paragraph
1.1 These practices cover sampling of new electrical insu-
lating liquids including oils, askarels, silicones, synthetic Collecting Samples from Electrical Equipment Using Section 9
Stainless Steel Cylinders (DGA and Water Analysis)
liquids, and natural ester insulating liquids as well as those
insulating liquids in service or subsequent to service in cables,
Sampling of Cans, Drums, Tank Cars, Tank Trucks and
transformers, circuit breakers, and other electrical apparatus. Small Electrical Equipment
Sampling Using the Dip-Type Device (drum thief) Section 10
These practices apply to liquids having a viscosity of less than
Sampling Using the Pressure-Type Device Section 11,
-4 2
6.476 × 10 m /s (540 cSt) at 40°C (104°F).
Annex A1.1
Sampling Using the Tank Car-Type Device Section 12,
1.2 Representative samples of electrical insulating liquids
Annex A1.2
aretakenfortestspecimenssothatthequalitypertinenttotheir
Sampling Cable Feeders
Mandatory Conditions Section 13
use may be determined. The quality in different portions of a
General Considerations Section 14
given container, or the average quality of the whole bulk may
Sampling Using the Manifold-Type Device Section 15,
be ascertained if desired. Annex A1.3
Cleaning, Preparation, Storage, and Handling of Section 16
1.3 ThevaluesstatedinSIunitsareregardedasthestandard
Sampling Containers
Storage, Packaging and Shipping of Samples Section 17
where applicable. Inch pound units are used where there is no
Cleaning and Storage of Sampling Devices Section 18
SI equivalent.
Sample Information Section 19
1.4 These practices also include special techniques and
Mandatory Information—Construction of Sampling Devices Annex A1
devices for sampling for dissolved gases-in-oil (DGA)
Determination of Electrical Apparatus Temperature Appendix X1
(D3612), water (D1533) and particles (D6786).
Sample Container Types Appendix X2
1.6 Handle askarels containing polychlorinated biphenyls
1.5 For ease of use, this document has been indexed as
(PCBs) according to federal and local regulations existing for
follows:
that country. For example, the federal regulations concerning
Section/
Section Title
Paragraph PCBs in the United States can be found in 40 CFR Part 761.
1.7 Properly contain, package and dispose of any liquid or
Mandatory Conditions and General Information Section 5
Description of Sampling Devices and Containers Section 6,
material resulting from the use of these practices in a manner
Annex A1,
thatisinaccordancewithlocalandstateregulationsspecificto
Appendix X2
the country in which the samples are taken.
Most Frequently Used Sampling Techniques for
Electrical Apparatus
1.8 This standard does not purport to address all of the
Collecting Samples from Electrical Equipment Using Bottles Section 7,
safety concerns, if any, associated with its use. It is the
and Cans Appendix X1,
Appendix X2
responsibility of the user of this standard to establish appro-
Collecting Samples from Electrical Equipment Using Glass Section 8
priate safety and health practices and determine the applica-
Syringes (DGA and Water Analysis)
bility of regulatory limitations prior to use. Specific warning
statements are given in 1.6, 1.7, Section 5, 10.1, 13.2, 15.2.3,
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These practices are under the jurisdiction of ASTM Committee D27 on Section 16, and 18.2. These practices involve close contact
Electrical Insulating Liquids and Gases and are the direct responsibility of
with the electrical insulating liquids being sampled as well as
Subcommittee D27.07 on Physical Test.
liquidsandothermaterialsusedtocleanthesamplingtoolsand
Current edition approved Oct. 1, 2015. Published October 2015. Originally
devices.When required, or as a matter of diligence to personal
approved in 1947. Last previous edition approved in 2007 as D923–07. DOI:
10.1520/D0923-15. safety, use personal protective equipment (PPE).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D923 − 15
2. Referenced Documents 5.1.1 Energized electrical appara
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