ASTM D4702-97(2003)

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

SCOPE
1.1 This guide covers crosscut, sweep-arm, and auger sampling systems.
1.1.1 Crosscut and Sweep-Arm Samplers—A crosscut sampler collects an increment as the sampler traverses a freely falling stream of coal, such as coal falling in a chute or from the head pulley of a conveyor. A sweep-arm sampler collects an increment as the sampler traverses a bed of coal on a moving conveyor belt. Both crosscut and sweep-arm sampling are designated Condition B (Full-Stream Cut) as defined in Increment Collection Classification of Practice D 2234/D 2234M.
1.1.2 Auger Samplers—An auger sampler collects an increment of coal as the auger is inserted vertically into a stationary load of coal contained within a railcar, truck, or barge. Auger sampling is designated Condition D (Stationary Coal Sampling) as defined in Increment Collection Classification of Practice D 2234/D 2234M.
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 Crosscut and Sweep-Arm Samplers—Crosscut- and sweep-arm-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 crosscut and sweep-arm 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: 09-Jun-2003
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.23 - Sampling

Relations

• Replaces: ASTM D4702-97 - Standard Guide for Inspecting Crosscut, Sweep-Arm, and Auger Mechanical Coal-Sampling Systems for Conformance with Current ASTM Standards
• Effective Date: 10-Jun-2003
• Replaced By: 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-Oct-2003
• Referred By: ASTM D7430/D7430M-22 - Standard Practice for Mechanical Sampling of Coal
• Effective Date: 10-Jun-2003
• Referred By: ASTM D6970-03(2019) - Standard Practice for Collection of Calcined Petroleum Coke Samples for Analysis
• Effective Date: 10-Jun-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: D 4702 – 97 (Reapproved 2003)
Standard Guide for
Inspecting Crosscut, Sweep-Arm, and Auger Mechanical
Coal-Sampling Systems for Conformance with Current
1
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 1.3 It is essential that the inspector have the documentation
listed in Section 2 of this guide when conducting an inspection.
1.1 This guide covers crosscut, sweep-arm, and auger sam-
1.4 The values stated in SI units are to be regarded as the
pling systems.
standard. The values given in parentheses are for information
1.1.1 Crosscut and Sweep-Arm Samplers—A crosscut sam-
only.
pler collects an increment as the sampler traverses a freely
1.5 This standard does not purport to address all of the
falling stream of coal, such as coal falling in a chute or from
safety concerns, if any, associated with its use. It is the
theheadpulleyofaconveyor.Asweep-armsamplercollectsan
responsibility of the user of this standard to establish appro-
increment as the sampler traverses a bed of coal on a moving
priate safety and health practices and determine the applica-
conveyor belt. Both crosscut and sweep-arm sampling are
bility of regulatory limitations prior to use. For a specific
designated Condition B (Full-Stream Cut) as defined in Incre-
hazard statement, see Section 5.
ment Collection Classification of Practice D 2234/D 2234M.
1.1.2 Auger Samplers—An auger sampler collects an incre-
2. Referenced Documents
ment of coal as the auger is inserted vertically into a stationary
2.1 ASTM Standards:
load of coal contained within a railcar, truck, or barge. Auger
2
D 121 Terminology of Coal and Coke
sampling is designated Condition D (Stationary Coal Sam-
2
D 2013 Practice of Preparing Coal Samples for Analysis
pling) as defined in Increment Collection Classification of
D 2234/D 2234M Practice for Collection of a Gross Sample
Practice D 2234/D 2234M.
2
of Coal
1.2 Spacing of increments pertains to the kind of interval
D 4749 Test Method for Performing the Sieve Analysis of
between increments. Intervals can be defined in quantitative
2
Coal and Designating Coal Size
terms, such as units of time or mass, or in terms of position
2
D 4916 Practice for Mechanical Auger Sampling
over the lot.
1.2.1 Spacing of Increments for Crosscut and Sweep-Arm
3. Terminology
Samplers—Crosscut- and sweep-arm-type mechanical sam-
3.1 Definitions—Definitions applicable to this guide are
pling systems take increments based on time, either at fixed
listed in Terminology D 121, and Practices D 2234/D 2234M,
time intervals or at random times during a fixed time strata.
D 4916, and D 2013.
Some crosscut samplers can take increments based on equal
mass of coal sampled as determined by scales. The sections of
4. Significance and Use
this guide that pertain to crosscut and sweep-arm samplers
4.1 This guide addresses the quality assurance criteria for
describe procedures for only time-based sampling systems.
operation of a mechanical coal-sampling system in accordance
This time-based inspection guideline will satisfy most criteria
with Practices D 2234/D 2234M, D 2013, and D 4916. This
for mass-based or combination mass-based and time-based
guide serves as a reference for inspecting mechanical coal-
sampling systems. If there are items that are not covered, the
sampling systems for conformance with applicable ASTM
inspector should refer to the manufacturer’s 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
5.1 Precautions—In addition to other precautions, person-
nel visiting facilities for observation of mechanical sampling
1
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 June 10, 2003. Published August 2003. Originally
2
approved in 1987. Last previous edition approved in 1997 as D 4702 – 97. Annual Book of ASTM Standards, Vol 05.06.
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.
D 4702 – 97 (2003)
system perfor
...