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ASTM Selected Technical Papers
Symposium on Coal Sampling
By
W. W. Anderson
W. W. Anderson
1
Technical Director
, Commercial Testing and Engineering Co.
, Chicago, Ill.
; Chairman of Committee D-5 on Coal and Coke
.
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ISBN-10:
0-8031-6532-3
ISBN:
978-0-8031-6532-8
No. of Pages:
159
Publisher:
ASTM International
Publication date:
1955
eBook Chapter
Tests of Accuracy of a Mechanical Coal Sampler
By
R. L. Coryell
,
R. L. Coryell
1
Division Engineer, Junior Engineer, and Junior Field Technician
, respectively, Mechanical Engineering Department, Consolidated Edison Co. of New York, Inc.
, New York, N. Y.
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F. J. Schwerd
,
F. J. Schwerd
1
Division Engineer, Junior Engineer, and Junior Field Technician
, respectively, Mechanical Engineering Department, Consolidated Edison Co. of New York, Inc.
, New York, N. Y.
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E. J. Parente
E. J. Parente
1
Division Engineer, Junior Engineer, and Junior Field Technician
, respectively, Mechanical Engineering Department, Consolidated Edison Co. of New York, Inc.
, New York, N. Y.
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Page Count:
11
-
Published:1955
Citation
Coryell, RL, Schwerd, FJ, & Parente, EJ. "Tests of Accuracy of a Mechanical Coal Sampler." Symposium on Coal Sampling. Ed. Anderson, WW. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 : ASTM International, 1955.
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A program for testing accuracy of an established mechanical coal sampling procedure is described and applied. Each step in the sampling procedure was tested for presence of bias and no significant bias was found. Sampling tests were made on a lot of mixed coals totaling 13,600 tons and the results analyzed for variances. For these coals, it is shown statistically that the ASTM accuracy required for commercial coal sampling by ASTM Standard Method D 492 - 48 may be obtained for any size lot by taking the number of increments (50 lb each) required by the ASTM procedure for lots of less than 1000 tons. However, to obtain the ASTM special purpose sampling accuracies, a single gross sample of these coals will not suffice.
References
1.
Landry
B. A.
and Anderson
W. W.
, “Coal Sampling by Large Increment Weights
.” Presented at the 137th Annual Fuels Conference, Am. Inst. Mining and Metallurgical Engrs. - Am. Soc. Mechanical Engrs.
, October 24–25, 1950.2.
Bertholf
W. M.
, “The Design of Coal Sampling Procedures
,” Symposium on Bulk Sampling, p. 46, Am. Soc. Testing Mats.
(1952
). (Issued as separate publication ASTM STP No. 114
.)3.
“
Handbook of Probability and Statistics
,” Handbook Publishers, Inc.
, Sandusky, Ohio (1953
).4.
Morrow
J. B.
and Proctor
C. P.
, “Variables in Coal Sampling
,” Technical Publication 645
, Am. Inst. Mining and Metallurgical Engrs.
(1935
).5.
Bertholf
W. M.
and Webb
W. L.
, “Tests of the Geary-Jennings Sampler at Cabin Creek
,” see p. 83 this publication.6.
Bertholf
W. M.
, “The Analysis of Variance in a Sampling Experiment
,” Symposium on Bulk Sampling, p. 36, Am. Soc. Testing Mats.
(1952
). (Issued as separate publication ASTM STP No. 114
.)
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