ASTM D1937-98e1
(Test Method)Standard Test Method for Carbon Black, Pelleted—Mass Strength
Standard Test Method for Carbon Black, Pelleted—Mass Strength
SCOPE
1.1 This test method covers the determination of the mass strength of pelleted carbon black. It is designed to determine the mass strength of a cylindrical column of pelleted carbon black. The results of this test are believed to relate to the ability of the carbon black to flow in bulk handling systems.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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Designation: D 1937 – 98
Standard Test Method for
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Carbon Black, Pelleted—Mass Strength
This standard is issued under the fixed designation D 1937; 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.
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e NOTE—An incorrect value in 9.1 was editorially corrected in May 2003.
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1. Scope 4.3 Platform Scale, to 50-kg (100 lb) capacity with a
sensitivity of 0.1 kg (0.02 lb) for air pressure gage calibration.
1.1 This test method covers the determination of the mass
strength of pelleted carbon black. It is designed to determine
5. Sampling
the mass strength of a cylindrical column of pelleted carbon
5.1 Samples shall be taken in accordance with Practices
black. The results of this test are believed to relate to the ability
D 1799 or D 1900.
of the carbon black to flow in bulk handling systems.
1.2 The values stated in SI units are to be regarded as the
6. Calibration
standard. The values given in parentheses are for information
6.1 Remove the original faceplate from the pressure gage
only.
and replace with a blank plate made from aluminum or other
1.3 This standard does not purport to address all of the
suitable material.
safety concerns, if any, associated with its use. It is the
6.2 Place the platform scale under the cylinder. With the
responsibility of the user of this standard to establish appro-
sliding door in an open position, pass the calibrating block
priate safety and health practices and determine the applica-
through the cylinder so it will rest on the platform of the
bility of regulatory limitations prior to use.
platform scale. The top of the calibrating block shall be near
2. Referenced Documents the cylinder top. The calibrating block must fit freely in the
cylinder and not bind against any inside surface. Adjust the
2.1 ASTM Standards:
platform scale for zero position with the calibrating block in
D 1799 Practice for Carbon Black—Sampling Packaged
2 place. Mark the zero position on the blank plate.
Shipments
6.3 Adjust the air-flow regulator until the needle on the air
D 1900 Practice for Carbon Black—Sampling Bulk Ship-
2 pressure gage has moved from rest or zero position, to
ments
one-third or more of total gage capacity.
3. Significance and Use 6.4 Activate the timer, allowing the plunger to press against
the calibrating block. Measure the equivalent mass produced
3.1 Mass strength gives an indication of the flowability in
by the plunger with the platform scale.
bulk handling. Due to the influence of other variables, an
6.5 Repeat 6.4, adjusting the regulator until even multiples
acceptable mass strength level must be determined by the user
of 50 N or 10 lbf are obtained. Mark the plate at these values.
and the producer.
6.6 Between each 50 N or 10 lbf mark on the plate, place
4. Apparatus
graduations representing each 10 N or 2 lbf. This may be done
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from measurement, since the gage should be linear in calibra-
4.1 Mass Strength Tester.
tion. Check these marks for accuracy with the platform scale.
4.2 Calibrating Block, made from a cylindrical wooden
6.7 From this calibrated gage plate, another gage plate may
shaft, 47 mm (1.8 in.) in diameter and 250 mm (10 in.) long.
be prepared by making the graduations coincide with those
measured on the calibrated plate. All graduations shall be
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This test method is under the jurisdiction of ASTM Committee D24 on Carbon
checked with the platform scale for accuracy.
Black and is the direct responsibility of Subcommittee D24.51 on Carbon Black
6.8 The calibrated air pressure gage shall be recalibrated at
Pellet Properties.
least once a month, or more frequently as deemed necessary.
Current edition approved May 10, 1998. Published October 1998. Originally
published as D 1937 – 62 T. Last previous edition D 1937 – 95.
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Annual Book of ASTM Standards, Vol 09.01
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Available from Titan Specialties, Inc., P.O. Box 2316, Pampa, TX 79066-2316. A Fairbanks Morse platform scale, Model 41–1000 (beam suffix FM) is suitable
Test Method D 1937 – 84 contains details for the construction of this apparatus. for this purpose.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
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D1937–98
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7. Procedure 9. Precision and Bias
7.1 Clean the cylinder with a brush to remove any adhering 9.1 These precision data are based on duplicate tests of four
carbon black. With the sliding
...
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