ASTM-D7430 › Historical Revision Information
Standard Practice for Mechanical Sampling of Coal
The following bibliographic material is provided to assist you with your purchasing decision:
Scope
1.2 Part A
1.2.1 Part A describes mechanical sampling procedures for coals (1) by size and condition of preparation (for example, mechanically cleaned coal or raw coal), and (2) by sampling characteristics.
1.2.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
Part B
1.3 Part B
1.3.1 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
Part C
1.4 Part C
1.4.1 Spacing of increments pertains to the kind of interval between increments. Intervals can be defined in quantitative terms, such as units of time or mass, or in terms of position over the lot.
1.4.2 Spacing of Increments for Cross-Belt and Falling Stream Samplers—Cross-belt and falling stream type mechanical sampling systems take increments based on time, either at fixed time intervals or at random times during a fixed time strata. Some falling stream samplers can take increments based on equal mass of coal sampled as determined by scales. The sections of this practice that pertain to cross-belt and falling stream samplers describe procedures for only time-based sampling systems. This time-based inspection guideline will satisfy most criteria for mass-based or combination mass-based and time-based sampling systems. If there are items that are not covered, the inspector should refer to the manufacturer's literature.
1.4.3 Spacing of Increments for Auger Sampling—The spacing of increments collected by auger sampling systems is defined in terms of position over the lot.
1.4.4 It is essential that the inspector have the documentation listed in Section 2 of this practice when conducting an inspection.
1.4.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
Part D
1.5 Part D
1.5.1 Part D does not purport to define an absolute bias. Bias defined by this practice is the difference between the population mean of the mechanical sampler test results and the accepted reference value.
1.5.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. For a specific hazard statement, see section 16.1.
Significance and Use
It is intended that this practice be used to provide a sample representative of the coal from which it is collected. Because of the variability of coal and the wide variety of mechanical sampling equipment available, caution should be used in all stages of the sample collection process, the design of sampling system specifications, the equipment procurement and the acceptance testing of installed equipment.
After removal from the sampling system and further preparation (Practice D2013), the sample may be analyzed for a number of different parameters. These parameters may define the lot's value, its ability to meet specifications, its environmental impact, as well as other properties.
Keywords
auger sampling; barge sampling; coal; coal sampling; inspection; mechanical sampling; railroad car sampling; sample division; sample reduction; sampling systems; split-spoon sampling; statistical analysis; stock pile sampling; truck sampling; ICS Number Code 73.040 (Coals); 75.160.10 (Solid fuels)
To find similar documents by ASTM Volume:
05.06 (Gaseous Fuels; Coal and Coke)
To find similar documents by classification:
73.040 (Coals Including lignites Coal products, see 75.160.10)
This document comes with our free Notification Service, good for the life of the document.
This document is available in either Paper or PDF format.
Document Number
ASTM-D7430-12
Revision Level
2012 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
July 31, 2012
Document Type
Practice
Page Count
40 pages
Committee Number
D05.23