ASTM D4892-89(2004)
(Test Method)Standard Test Method for Density of Solid Pitch (Helium Pycnometer Method)
Standard Test Method for Density of Solid Pitch (Helium Pycnometer Method)
SIGNIFICANCE AND USE
This test method is useful in characterizing pitches as one element in establishing uniformity of shipments and sources of supply. With this method, the density is determined to two decimal places, which is sufficient for most applications. If a more precise measurement is required (three decimal places), use Test Methods D 2320 or D 71.
SCOPE
1.1 This test method covers the determination of pitch density by helium pycnometer. It is applicable at a range of room temperatures of 15 to 35°C.
1.2 The values stated in SI units are to be regarded as the standard.
1.3This 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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An American National Standard
Designation:D4892–89(Reapproved 2004)
Standard Test Method for
Density of Solid Pitch (Helium Pycnometer Method)
This standard is issued under the fixed designation D 4892; 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
density, 25°C, g/cm ~grams per cubic centimeter! (1)
1.1 This test method covers the determination of pitch
4. Summary of Test Method
density by helium pycnometer. It is applicable at a range of
4.1 The sample is pulverized and screened to a given
room temperatures of 15 to 35°C.
fraction, then the volume of a weighed portion of the fraction
1.2 The values stated in SI units are to be regarded as the
is determined using a helium pycnometer.
standard.
1.3 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 This test method is useful in characterizing pitches as
responsibility of the user of this standard to establish appro-
one element in establishing uniformity of shipments and
priate safety and health practices and determine the applica-
sources of supply. With this method, the density is determined
bility of regulatory limitations prior to use.
totwodecimalplaces,whichissufficientformostapplications.
2. Referenced Documents
If a more precise measurement is required (three decimal
places), use Test Methods D 2320 or D 71.
2.1 ASTM Standards:
D71 Test Method for Relative Density of Solid Pitch and
6. Apparatus
Asphalt (Displacement Method)
6.1 Helium Pycnometer.
D 2320 Test Method for Density (Specific Gravity) of Solid
6.2 Balance, capable of weighing a 150-g specimen to
Pitch (Pycnometer Method)
within 1 mg.
D 2962 Test Method for Calculating Volume-Temperature
6.3 Sieves, U.S. Standard 2.36-mm (No. 8), 600-µm (No.
Correction for Coal-Tar Pitch
30), conforming to SpecificationE11.
D 4296 Practice for Sampling Pitch
6.4 Thermometer, for measuring room temperature.
E11 Specification for Wire-Cloth Sieves for Testing Pur-
poses
7. Bulk Sampling
3. Terminology
7.1 Samples from shipments shall be taken in accordance
with Practice D 4296 and shall be free of foreign substances.
3.1 Definition of Term Specific to this Standard:
3.1.1 density, as determined by this test method—the mass
8. Dehydration
per unit volume and shall be reported as follows:
8.1 All bulk samples suspected of having free moisture
should be air-dried or oven-dried at 50°C in a convection or
forced-air oven before analyzing.
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material. Helium pycnometers available from the following suppliers have been found
Current edition approved Nov. 1, 2004. Published November 2004. Originally satisfactory for this purpose: (a) Beckman 2500 Harbor Blvd., Fullerton, CA, (b)
e1
approved in 1989. Last previous edition approved in 1999 as D 4892–89(1999) . Micromeritics, 5680 Goshen Springs Rd., Norcross, GA, and (c) Quantachrome, 5
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D4892–89 (2004)
TABLE 1 Volume Correction Factors Versus Measurement
9. Preparation of Test Specimen
Temperature
9.1 Crush a 50 to 200-g representative portion of the dry
Measurement Temperature, °C Correction Factor
pitch until all of it passes the 2.36 mm (No. 8 sieve). Avoid
15 1.005
grinding the pitch. Remove the fines by screening through the
16 1.004
600 µm (No. 30 sieve) and use the pitch retained on this sieve
17 1.004
18 1.003
as the test specimen.
19 1.003
20 1.002
10. Calibration of Helium Pycnometer
21 1.002
22 1.001
10.1 Calibrate daily or before using, following instrument
23 1.001
manufacturer’s instruct
...
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