ASTM D_自然科学_专业资料。Designation: D – 07 Standard Practice for Preparing Coal Samples for Analysis1 This standard. ASTM. American Society for Testing and Materials. Btu/lb. British thermal units per pound cal/g (ISO ), or m/s (18 inches/s) (ASTM D). ASTM D/DM Standard Practice for Preparing Coal Samples for Analysis. standard by ASTM International, 09/01/ View all product details.
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This procedure may be used to provide a sample of any mass and size consist from the gross or divided sample to, and including, the analysis sample. A number in parentheses indicates the year oflast reapproval.
Please copy and paste this embed script to where you want to embed Embed Script. Current edition approved Aug. Compute that value as shown below: The mass and top size of the gross or divided sample collected by using these guides and practices are usually too large for chemical or physical testing.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Only under certain conditions will this referee method be directly applicable to routine test programs.
Multiply the desired composite mass by the percentage of the total which each sample represents to?
ASTM D 2013 – 1986 Standard Method of Preparing Coal Sample for Analysis
Test Method D speci? A superscript epsilonindicates an editorial change since the last revision. At regular intervals, the cutter movement is reversed and a sample increment is collected on each trip through the coal stream. Unknown coals are to be considered under Group B.
Since this practice does not produce a numerical result, determination of bias is not applicable. This is the analysis sample. Any gross change in the division and analysis methods or in the ash characteristics of the test coal will nullify the test results.
A number in parentheses indicates the year of last reapproval. Select an approximate desired mass for the composite sample.
C Above limit of 1. Details appear in standard texts. The term is used within Practice D in the sense of its broad dictionary de?
ASTM D – Standard Method of Preparing Coal Sample for Analysis – Free Download PDF
Results should be below 2. Mix by mechanical means before extracting portions for analysis. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Please help us to share our service with your friends. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
D2031 and Use 5.
ASTM D / DM – 18 Standard Practice for Preparing Coal Samples for Analysis
Under no circumstances shovel the sample into the riffle or dribble into the riffle from a small-mouthed container. D — 07 FIG. The oven shall be capable of concerned parties. Criminal penalties may apply for noncompliance. NOTE 2—As used in this standard, the term represent together with its related forms does not imply that samples satisfy a particular quantitative or statistical relationship to the coal which was sampled. Divide the ground subsample by riffling, using the small riffle see 6.
NOTE 1—It is recommended that, in the case of mechanical division in which an increment is not thoroughly mixed with other increments before division, a portion of each increment be collected by the subsequent stage increment collection process. Practice D provide instructions for reducing and dividing the gross or divided sample, by on-line or off-line processes, or both, to a top size and mass suitable to the performance of testing.