ASTM D4892-89(2009)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D4892 − 89(Reapproved 2009)
Standard Test Method for
Density of Solid Pitch (Helium Pycnometer Method)
This standard is issued under the fixed designation D4892; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 4. Summary of Test Method
4.1 The sample is pulverized and screened to a given
1.1 This test method covers the determination of pitch
fraction, then the volume of a weighed portion of the fraction
density by helium pycnometer. It is applicable at a range of
is determined using a helium pycnometer.
room temperatures of 15 to 35°C.
1.2 The values stated in SI units are to be regarded as
5. Significance and Use
standard. No other units of measurement are included in this
5.1 This test method is useful in characterizing pitches as
standard.
one element in establishing uniformity of shipments and
1.3 This standard does not purport to address all of the
sources of supply. With this method, the density is determined
safety concerns, if any, associated with its use. It is the
totwodecimalplaces,whichissufficientformostapplications.
responsibility of the user of this standard to establish appro-
If a more precise measurement is required (three decimal
priate safety and health practices and determine the applica-
places), use Test Methods D2320 or D71.
bility of regulatory limitations prior to use.
6. Apparatus
2. Referenced Documents
6.1 Helium Pycnometer.
2.1 ASTM Standards:
6.2 Balance, capable of weighing a 150-g specimen to
D71 Test Method for Relative Density of Solid Pitch and
within 1 mg.
Asphalt (Displacement Method)
6.3 Sieves, U.S. Standard 2.36-mm (No. 8), 600-µm (No.
D2320 Test Method for Density (Relative Density) of Solid
30), conforming to Specification E11.
Pitch (Pycnometer Method)
D2962 Practice for Calculating Volume-Temperature Cor-
6.4 Thermometer, for measuring room temperature.
rection For Coal-Tar Pitches
7. Bulk Sampling
D4296 Practice for Sampling Pitch
E11 Specification for Woven Wire Test Sieve Cloth and Test
7.1 Samples from shipments shall be taken in accordance
Sieves
with Practice D4296 and shall be free of foreign substances.
3. Terminology
8. Dehydration
3.1 Definitions of Terms Specific to This Standard:
8.1 All bulk samples suspected of having free moisture
3.1.1 density, as determined by this test method— the mass should be air-dried or oven-dried at 50°C in a convection or
per unit volume and shall be reported as follows: forced-air oven before analyzing.
density, 25°C, g/cm grams per cubic centimeter (1)
~ !
9. Preparation of Test Specimen
9.1 Crush a 50 to 200-g representative portion of the dry
pitch until all of it passes the 2.36 mm (No. 8 sieve). Avoid
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
SubcommitteeD02.05onPropertiesofFuels,PetroleumCokeandCarbonMaterial.
Current edition approved April 15, 2009. Published July 2009. Originally Helium pycnometers available from the following suppliers have been found
approved in 1989. Last previous edition approved in 2004 as D4892–89(2004). satisfactory for this purpose: (a) Beckman 2500 Harbor Blvd., Fullerton, CA, (b)
DOI: 10.1520/D4892-89R09. Micromeritics, 5680 Goshen Springs Rd., Norcross, GA, and (c) Quantachrome, 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Aerial Way, Syosset, NY. If you are aware of alternative suppliers, please provide
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM this information to ASTM International Headquarters. Your comments will receive
Standards volume information, refer to the standard’s Document Summary page on careful consideration at a meeting of the responsible technical committee , which
the ASTM website. you may attend.
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D4892 − 89 (2009)
TABLE 1 Volume Correction Factors Versus Measurement
grinding the pitch. Remove the fines by screening through the
Temperature
600 µm (No. 30 sieve) and use the pitch retained on this sieve
Measurement Temperature, °C Correction Factor
as the test specimen.
15 1.005
16 1.004
10. Calibration of Helium Pycnometer
17 1.004
18 1.003
10.1 Calibrate daily or before using, following instrument
19 1.003
manufacturer’s instructions.
20 1.002
21 1.002
22 1.001
11. Procedure
23 1.001
11.
...