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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However, some tests may require a sample of different mass or top size. C Above limit of 1. These lower weights may be used for particular coals if they have been shown, by using the procedures of A1.

Therefore, carefully select the standard to be used to collect the gross sample.

It is d2103 to be used for evaluation of nonreferee methods, and for testing of equipment. Do not produce riffle portions which are smaller in mass than stated in Table 1 of this standard.

The user must exercise judgment to assess when the riffled mass is sufficiently close to the desired mass so as to not materially affect the results of the test s for which the composite sample is being prepared.

ASTM D 2013 – 1986 Standard Method of Preparing Coal Sample for Analysis

Size px x x x x Therefore, carefully select the standard to be used to collect the gross sample. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

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Most often, the sample is collected, reduced, and divided one or more times by use of a mechanical sampling system. Link to Active This link will always route to the current Active version of the standard. If, however, it is desired to crush directly to No. 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.

These illustrate various designs, but other acceptable designs are available. 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 oflast revision.

Any gross change in the division and analysis methods or in the ash characteristics of the test coal will nullify the test results. Current edition approved Aug. Criminal penalties may apply for noncompliance. Please fill this form, we will try to respond as soon as possible.

ASTM D – 07 Standard Practice for Preparing Coal Samples 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. Current edition approved D20133 1, In addition, a method to determine the percent air dried moisture loss of the sample is provided. We are a non-profit group that run this website to share documents. Active view current version of standard.


Last previous edition D “. Any bias in the gross or divided sample before adherence to this practice will remain in the final sample resulting d213 use of this practice. Sieve tests shall be made and reported in accordance with Test Method D The container should be about half full and never more than two thirds full in order to obtain good mixing of astmm sample. Historical Version s – view previous versions of standard. Air dry in accordance with Test Method D A typical riffle is shown in Fig.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Do not allow the coal to build up in or above the riffle slots. If these criteria are not met, follow the procedure described in Practice D for d013 necessary information to improve techniques of division and analysis.

D — 07 FIG. 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. Samples may require air drying to xstm properly through the reduction and dividing equipment.