ASTM D4702-03a

Standard Guide for Quality Management of Mechanical Coal Sampling Systems

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-Nov-2003
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.23 - Sampling

Relations

• Replaces: ASTM D4702-03 - Standard Guide for Inspecting Crosscut, Sweep-Arm, and Auger Mechanical Coal-Sampling Systems for Conformance with Current ASTM Standards
• Effective Date: 01-Dec-2003
• Replaced By: ASTM D4702-04 - Standard Guide for Quality Management of Mechanical Coal Sampling Systems
• Effective Date: 01-Nov-2004
• Referred By: ASTM D6970-03(2019) - Standard Practice for Collection of Calcined Petroleum Coke Samples for Analysis
• Effective Date: 01-Dec-2003
• Referred By: ASTM D7430/D7430M-22 - Standard Practice for Mechanical Sampling of Coal
• Effective Date: 01-Dec-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation:D4702–03a
Standard Guide for
1
Quality Management of Mechanical Coal Sampling Systems
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 bility of regulatory limitations prior to use. For a specific
hazard statement, see Section 5.
1.1 Thisguideisapplicabletocross-belt,fallingstream,and
auger sampling systems.
2. Referenced Documents
1.2 Spacing of increments pertains to the kind of interval
2
2.1 ASTM Standards:
between increments. Intervals can be defined in quantitative
D 121 Terminology of Coal and Coke
terms, such as units of time or mass, or in terms of position
D 2013 Practice of Preparing Coal Samples for Analysis
over the lot.
D 2234 Practice for Collection of a Gross Sample of Coal
1.2.1 Spacing of Increments for Cross-Belt and Falling
D 4749 Test Method for Performing the Sieve Analysis of
Stream Samplers—Cross-beltandfallingstreamtypemechani-
Coal and Designating Coal Size
cal sampling systems take increments based on time, either at
D 4916 Practice for Mechanical Auger Sampling
fixed time intervals or at random times during a fixed time
strata. Some crosscut samplers can take increments based on
3. Terminology
equal mass of coal sampled as determined by scales. The
3.1 Definitions—Definitions applicable to this guide are
sections of this guide that pertain to cross-belt and falling
listed in Terminology D 121, Practices D 2234 and D 4916,
stream samplers describe procedures for only time-based
and Practice D 2013.
sampling systems. This time-based inspection guideline will
satisfymostcriteriaformass-basedorcombinationmass-based
4. Significance and Use
andtime-basedsamplingsystems.Ifthereareitemsthatarenot
4.1 This guide addresses quality assurance criteria for op-
covered, the inspector should refer to the manufacturer’s
eration of a mechanical coal-sampling system in accordance
literature.
with Practice D 2234, Practice D 2013, and Practice D 4916.It
1.2.2 Spacing of Increments for Auger Sampling—The
provides recommendations for performance monitoring, in-
spacing of increments collected by auger sampling systems is
spection, and maintenance, which are necessary in maintaining
defined in terms of position over the lot.
a sampling system’s capability to consistently obtain a repre-
1.3 It is essential that the inspector have the documentation
sentative sample.
listedinSection2ofthisguidewhenconductinganinspection.
1.4 The values stated in SI units are to be regarded as the
5. Hazards
standard. The values given in parentheses are for information
5.1 Precautions—In addition to other precautions, person-
only.
nel visiting facilities for observation of mechanical sampling
1.5 This standard does not purport to address all of the
system performance should immediately upon arrival report to
safety concerns, if any, associated with its use. It is the
the facility management to inform them of their presence and
responsibility of the user of this standard to establish appro-
the purpose of their visit. The inspector should ask for
priate safety and health practices and determine the applica-
1 2
This guide is under the jurisdiction of ASTM Committee D05 on Coal and For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Coke and is the direct responsibility of Subcommittee D05.23 on Sampling. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Current edition approved Dec. 1, 2003. Published December 2003. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1987. Last previous edition approved in 1997 as D 4702 – 03. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D4702–03a
drawings, specifications, and instructions on the applicable Variations in the physical characteristics, such as particle-size
safety practices and regulations to be followed on the site. distribution,surfacemoisture,extraneousmatter,andoversized
material, can become cyclical and even could be in phase with
6. Assessing the Organization and Planning of Sampling
the time-based increment collection.When such cyclical varia-
Operations
tions occur in the coal stream, the source of the variations
6.1 It is recommended that inspection personnel meet with
should be inv
...