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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Any gross change in the division and analysis methods or in the ash characteristics of the test coal will nullify the test results.
These illustrate various designs, but other acceptable designs are available. Size px x x x x 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.
If these criteria are not met, follow the procedure asstm in Practice D for the necessary information to improve techniques of division and analysis. The container should be about half full and never more than two thirds full in order to obtain good mixing of v2013 sample. The term is used within Practice D in the sense of its broad dictionary de? 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.
Active view current version of standard. 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. Most often, the sample is collected, reduced, and divided one or more times by use of a mechanical sampling d2103.
Compute that value as shown below: 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. This standard does not purport to address all of the safety concerns, if any, associated with its use.
The purpose of these tests is not to? Result should be below 1.
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. Active view current version of standard Translated Standard: This procedure may be used to provide a sample of any mass and size consist from the gross or divided sample to, and asrm, the analysis sample.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Determine whether sample masses have been decreased, and by what percentage, prior to arrival of samples at the laboratory.
Adhere to the minimum weights required in Table 1. Each cutter is designed to extract increments from the feed and dd2013 discharge these into the hollow shaft.
Select and combine the riffle portions which yield a close approximation of the desired mass. Details appear in standard texts. Mix by mechanical means before extracting portions for analysis. NOTE 4—It is highly unlikely that the exact number aztm grams needed for each sample can be obtained using a riffle while adhering astn the requirements of Table 1. These lower weights may be used for particular coals if they have been shown, astn using the procedures of Annex A1. Distribute this large number of increments equally throughout the entire discharge from the sample crusher because crushers can introduce appreciable segregation.
Account for that information when making the composite. D – 86 Reapproved Standard Method of Preparing Coal Samples for Analysis 1 This stlll’ldard is issued under the fixed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year aztm revision.
Mn to be combined to make the composite sample. The data obtained from tests using consistent sample preparation and analysis method are used to estimate the random errors in the various stages of sample division and analysis. S2013 lower weights may be used for particular coals if they have been shown, by using the procedures of A1.
Apparatus reduced in dd2013 size by crushing or grinding without significant change. Glass containers, sealed with rubber gaskets, may be used, but care must be taken to avoid breakage in transport. The details pertaining to the preparation of composite samples must be agreed to by all concerned parties.
Only under certain conditions will this referee method be directly applicable to routine test programs. Data taken at intermediate steps are not consistent within limits of these rounding errors. Indicate on the laboratory report that data were obtained by testing a close-approximation composite, and that the results may therefore not fully re?
Divide the ground aztm by riffling, using the small riffle see 6.
ASTM D – Standard Method of Preparing Coal Sample for Analysis – Free Download PDF
In any group of 5 estimates of Sda2 based on 4 subsamples for each estimate, the ratio of the largest estimate to the average of the group should not exceed 2. Test Method D speci? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
The minimum discharge opening of the feed chute shall be the same width as the riffle slot opening. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. At regular intervals, the cutter movement is reversed and a sample increment is collected on each trip through the coal stream. We are a non-profit group that run this website to share documents.
Therefore, carefully select the standard to be used to collect the gross sample. Calculate the variances of d2031 combinations: Descriptions of Terms Specific to Tltis Standard 3.
ASTM D 2013 – 1986 Standard Method of Preparing Coal Sample for Analysis
We need your help! Under no circumstances shovel the sample into the riffle or dribble into the riffle from a small-mouthed container. If these criteria are met, the variance of division and analysis may be taken as the overall average Sda2 of the 30 sets of data. A number in parentheses indicates the year of last reapproval.