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ASTM D7430-14
Standard Practice for Mechanical Sampling of Coal
STANDARD published on 15.5.2014
The information about the standard:
Designation standards: ASTM D7430-14
Note: WITHDRAWN
Publication date standards: 15.5.2014
SKU: NS-38446
The number of pages: 41
Approximate weight : 123 g (0.27 lbs)
Country: American technical standard
Category: Technical standards ASTM
Annotation of standard text ASTM D7430-14 :
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)
Additional information
| Significance and Use | ||||||||||||||||||||||||||||||
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5.1 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. 5.2 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. |
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| 1. Scope | ||||||||||||||||||||||||||||||
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1.1 This practice is divided into 4 parts. These 4 parts represent the previous standards D7256/D7256M, D4916, D4702, and D6518. These 4 standards are the 4 that govern the mechanical sampling of coal and have been combined into one document for the ease of reference of the users of these standards. Part A
1.2 Part A—Mechanical Collection and Within-System Preparation of a Gross Sample of Coal from Moving Streams—Covers procedures for the mechanical collection of a sample under Classification I-B-1 and I-B-2 (Practice D2234/D2234M) and the within-system preparation (reduction and division) of gross samples utilizing various components of the mechanical sampling system. 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—Mechanical Auger Sampling——Describes procedures for the collection of an increment, partial sample, or gross sample of material using mechanical augers. Reduction and division of the material by mechanical equipment at the auger is also covered. Further manual or mechanical reduction or division of the material elsewhere shall be performed in accordance with Practice D2013. 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—Quality Management of Mechanical Coal Sampling Systems—Is applicable to the quality management of cross-belt, falling stream, and auger sampling systems. 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—Bias Testing of a Mechanical Coal Sampling System—Presents sample collection and statistical evaluation procedures for testing mechanical sampling systems (including auger systems), subsystems, and individual system components for bias. It is the responsibility of the user of this practice to select the appropriate procedure for a specific sampling situation. 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.
Standard Test Method for Performing the
Sieve Analysis of Coal and Designating Coal Size Standard Practice for Preparing Coal
Samples for Analysis Standard Guide for Quality Management in
an Organization That Samples or Tests Coal and Coke Standard Test Method for Total Moisture
in Coal Standard Practice for Collection of a
Gross Sample of Coal Standard Practice for Quality Management
of Mechanical Coal Sampling Systems (Withdrawn 2008) Standard Terminology of Coal and Coke Standard Practice for Calculating Sample
Size to Estimate, With Specified Precision, the Average for a
Characteristic of a Lot or Process Standard Guide for Probability Sampling
of Materials Standard Practice for Mechanical
Collection and Within-System Preparation of a Gross Sample of Coal
from Moving Streams (Withdrawn 2008) Standard Practice for Bias Testing a
Mechanical Coal Sampling System (Withdrawn 2008) Standard Practice for Mechanical Auger
Sampling (Withdrawn 2008) Standard Practice for Conducting an
Interlaboratory Study to Determine the Precision of a Test
Method Standard Terminology Relating to Quality
and Statistics (Includes all amendments and changes 4/21/2022). Standard Practice for Use of the Terms
Precision and Bias in ASTM Test Methods |
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