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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Aetm, however, it is desired to crush directly to No. A typical riffle is shown in Fig. Please fill this form, we will try to respond as soon as possible.
Investigate values in excess of this ratio x2013 proceeding with the test. A number in parentheses indicates the year oflast reapproval. 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.
ASTM D 2013 – 1986 Standard Method of Preparing Coal Sample for Analysis
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. NOTE 3—As used in this standard, parameters which are additive are those having values that are not affected by interactions asstm the physical and chemical properties of the combined individual samples.
Active view current version of standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Therefore, carefully select the standard to be used to collect the gross sample. Summary of Practice 4. Divide average Sda2 Column 10 by overall averages Sda2. Glass containers, sealed with rubber gaskets, may be used, but care must be taken to avoid breakage in transport.
Details appear in standard texts. This standard does not purport to address all of the safety concerns, if any, associated with its use.
ASTM D – 00ae1 Standard Practice of Preparing Coal Samples for Analysis
It is advisable to mix the composite sample thoroughly, but without altering the moisture content, before reducing or dividing to smaller quantities. Multiply the desired composite mass by the percentage of the total which each sample represents to?
Mn to be combined to make the composite sample. Samples may require air drying to feed properly through the reduction and dividing equipment. Significance and Use 5. In addition, after completing 30 sets, by groups of 5, the ratio of the largest group average to the overall asgm should not exceed 1.
E2013 addition, a method to determine the percent air dried moisture loss of the sample is provided. 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. These illustrate various designs, but other acceptable designs are available.
The analysis sample can be used to determine the value of the coal represented, its ability to meet specifications, its environmental impact, as well as for other purposes. 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 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.
Adhere to the minimum weights required in Table 1. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? We are a non-profit group that run this website to share documents. The details pertaining to the preparation of composite samples must be agreed to by all concerned parties.
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. Historical Version s – view previous versions of standard.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Results should be below 2. Also, a reserve sample may be desired in case a check analysis or test is required.
Practice D provide instructions for reducing and dividing the gross or divided sample, by on-line d2031 off-line processes, or both, to a top size and mass suitable to the performance of testing. Many terms used in this practice may be found in Terminologies D and E and in Practice E Compute that value as shown below: Result should be below 1. A typical oven is shown in Fig; Method D NOTE 4—It is highly unlikely that the exact number of grams needed for each sample can be astj using a riffle while adhering to the requirements of Table 1.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee astmm Standards, at the address shown below. 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.
This is the analysis sample. Sample preparation should be checked at intervals by the methods described in Annex Ast, or Annex A2.
However, some tests may require a sample of different mass or top size. Sieve tests shall be made and reported in accordance with Test Method D Any gross change in the division and analysis methods or in the ash characteristics of the test coal will nullify the test results.
Any gross change in the division and analysis methods or in the ash characteristics of the test coal will nullify the test results. 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. Work Item s – proposed revisions of this standard.