ASTM D4702-03

Standard Guide for Inspecting Crosscut, Sweep-Arm, and Auger Mechanical Coal-Sampling Systems for Conformance with Current ASTM Standards

SCOPE
1.1 This guide is applicable to cross-belt, falling stream, and auger sampling systems.
1.2 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.
1.2.1 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 crosscut samplers can take increments based on equal mass of coal sampled as determined by scales. The sections of this guide 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.
1.2.2 Spacing of Increments for Auger Sampling—The spacing of increments collected by auger sampling systems is defined in terms of position over the lot.
1.3 It is essential that the inspector have the documentation listed in Section 2 of this guide when conducting an inspection.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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 5.

General Information

• Status: Historical
• Publication Date: 30-Sep-2003
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.23 - Sampling

Relations

• Replaces: ASTM D4702-97(2003) - Standard Guide for Inspecting Crosscut, Sweep-Arm, and Auger Mechanical Coal-Sampling Systems for Conformance with Current ASTM Standards
• Effective Date: 01-Oct-2003
• Replaced By: ASTM D4702-03a - Standard Guide for Quality Management of Mechanical Coal Sampling Systems
• Effective Date: 01-Dec-2003
• Referred By: ASTM D6970-03(2019) - Standard Practice for Collection of Calcined Petroleum Coke Samples for Analysis
• Effective Date: 01-Oct-2003
• Referred By: ASTM D7430/D7430M-22 - Standard Practice for Mechanical Sampling of Coal
• Effective Date: 01-Oct-2003

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4702 – 03
Standard Guide for
Inspecting Crosscut, Sweep-Arm, and Auger Mechanical
Coal-Sampling Systems for Conformance with Current
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ASTM Standards
This standard is issued under the fixed designation D 4702; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
1.1 This guide is applicable to cross-belt, falling stream, and 2.1 ASTM Standards:
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auger sampling systems. D 121 Terminology of Coal and Coke
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1.2 Spacing of increments pertains to the kind of interval D 2013 Practice of Preparing Coal Samples for Analysis
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between increments. Intervals can be defined in quantitative D 2234 Practice for Collection of a Gross Sample of Coal
terms, such as units of time or mass, or in terms of position D 4749 Test Method for Performing the Sieve Analysis of
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over the lot. Coal and Designating Coal Size
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1.2.1 Spacing of Increments for Cross-Belt and Falling D 4916 Practice for Mechanical Auger Sampling
Stream Samplers—Cross-belt and falling stream type mechani-
3. Terminology
cal sampling systems take increments based on time, either at
fixed time intervals or at random times during a fixed time 3.1 Definitions—Definitions applicable to this guide are
listed in Terminology D 121, Practices D 2234 and D 4916,
strata. Some crosscut samplers can take increments based on
equal mass of coal sampled as determined by scales. The and Practice D 2013.
sections of this guide that pertain to cross-belt and falling
4. Significance and Use
stream samplers describe procedures for only time-based
4.1 This guide addresses quality assurance criteria for op-
sampling systems. This time-based inspection guideline will
eration of a mechanical coal-sampling system in accordance
satisfy most criteria for mass-based or combination mass-based
with Practice D 2234, Practice D 2013, and Practice 4916. This
and time-based sampling systems. If there are items that are not
guide serves as a reference for inspecting mechanical coal-
covered, the inspector should refer to the manufacturer’s
sampling systems for conformance with applicable ASTM
literature.
standards. It describes step-by-step procedures for such inspec-
1.2.2 Spacing of Increments for Auger Sampling—The
tions, with specific ASTM references for each step.
spacing of increments collected by auger sampling systems is
defined in terms of position over the lot.
5. Hazards
1.3 It is essential that the inspector have the documentation
5.1 Precautions—In addition to other precautions, person-
listed in Section 2 of this guide when conducting an inspection.
nel visiting facilities for observation of mechanical sampling
1.4 The values stated in SI units are to be regarded as the
system performance should immediately upon arrival report to
standard. The values given in parentheses are for information
the facility management to inform them of their presence and
only.
the purpose of their visit. The inspector should ask for
1.5 This standard does not purport to address all of the
drawings, specifications, and instructions on the applicable
safety concerns, if any, associated with its use. It is the
safety practices and regulations to be followed on the site.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Assessing the Organization and Planning of Sampling
bility of regulatory limitations prior to use. For a specific
Operations
hazard statement, see Section 5.
6.1 It is recommended that inspection personnel meet with
the appropriate personnel responsible for the mechanical sam-
pling system, on all visits, to discuss the organization and
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This guide is under the jurisdiction of ASTM Committee D05 on Coal and
Coke and is the direct responsibility of Subcommittee D05.23 on Sampling.
Current edition approved Oct. 1, 2003. Published November 2003. Originally
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approved in 1987. Last previous edition approved in 1997 as D 4702 – 97. Annual Book of ASTM Standards, Vol 05.05.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D4702–03
planning of sampling operations. ASTM standards provide for eliminate the variations, then either the number of primary
the use of various options. Examples and references are given increments or the primary cutter velocity or both shall be
in 6.1.1
...