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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A good text for this purpose is Grubbs, F. Also, a reserve sample may be desired in case a check analysis or test is required. If, however, it is desired to crush directly to No.
ASTM D / DM – 18 Standard Practice for Preparing Coal Samples for Analysis
Unknown coals are to be considered under Group B. A number in parentheses indicates the year oflast reapproval. Designate the results R1, R2, R The term is used within Practice D in the sense of its broad dictionary de?
Asstm terms used in this practice may be found in Terminologies D and E and in Practice E Work Item s – proposed revisions of this standard. Divide this subsample by riffling with the small riffle to not less than the quantity speci?
A superscript epsilonindicates an editorial change since the last revision. Divide average Sda2 Column 10 by overall averages Sda2. Please fill this form, we will try to respond as soon as possible.
Any gross change in the division and analysis methods or in the ash characteristics of the test coal will nullify the test results. The remaining sample may be further divided on-site to facilitate transporting it to the laboratory where further reduction and division likely occurs before analysis.
Any bias in the gross or divided sample before adherence to this practice will remain in the? It is the responsibility of the satm of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. It is preferable that feed chutes and enclosed riffles be used.
ASTM D 2013 – 1986 Standard Method of Preparing Coal Sample for Analysis
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine wstm applicability of regulatory limitations prior to use. Pass the coal through the riffle from a feed scoop, feed bucket, or riffle pan having a lip or opening the full width of the riffle.
Most often, the sample is collected, reduced, and divided one or more times by use of a mechanical sampling system. Select and combine the riffle portions which yield a close approximation of the desired mass. In this example, gross sample No. In addition, a method to determine the percent air dried moisture loss of the sample is provided.
However, some tests may require a sample of different ast or top size.
Sieve tests shall be made and reported in accordance with Test Astj D Practice D provides 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. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Current dd2013 approved June 1, Size px x x x x The values given in parentheses are provided for information purposes only. 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. Link to Active This link will always route to the current Active version of the standard. A typical oven is shown in Fig; Method D The container should be about half full and never more than two thirds full in order to obtain good mixing of the sample.
The data obtained d213 tests using consistent sample preparation and analysis method are used to estimate the random errors in the various stages of sample division and analysis. A typical enclosed riffle is shown in Fig. Result should be below 1. The wheel should be rotated at a speed so that the particles fall gently from top to bottom of the container, mixing the sample thoroughly. This standard does not purport to address all of the safety concerns, if any, associated with its use. These lower weights may be used for particular coals if they have been shown by using the procedure of Annex A1.
Thus, the difference 0.