BS ISO 20904:2006
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Hard coal. Sampling of slurries
Hardcopy , PDF
04-03-2020
English
30-11-2006
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Foreword
1 Scope
2 Normative references
3 Definitions
4 Principles of sampling slurries
4.1 General
4.2 Sampling errors
4.3 Sampling and overall variance
5 Sampling schemes
6 Minimization of bias and unbiased increment mass
6.1 Minimizing bias
6.2 Volume of increment for falling stream samplers
to avoid bias
6.3 Volume of increment for manual sampling to avoid
bias
7 Precision of sampling and determination of increment
variance
7.1 Overall precision
7.2 Primary increment variance
7.3 Preparation and testing variance
8 Number of sub-lots and number of increments per sub-lot
9 Minimum mass of solids in lot and sub-lot samples
9.1 General
9.2 Minimum mass of solids in lot samples
9.3 Minimum mass of solids in sub-lot samples
9.4 Minimum mass of solids in lot and sub-lot samples
after size reduction
10 Time-basis sampling
10.1 General
10.2 Sampling interval
10.3 Cutters
10.4 Taking of increments
10.5 Constitution of lot or sub-lot samples
10.6 Division of increments and sub-lot samples
10.7 Division of lot samples
10.8 Number of cuts for division
11 Stratified random sampling within fixed time intervals
12 Mechanical sampling from moving streams
12.1 General
12.2 Design of the sampling system
12.3 Slurry sample cutters
12.4 Mass of solids in increments
12.5 Number of primary increments
12.6 Routine checking
13 Manual sampling from moving streams
13.1 General
13.2 Choosing the sampling location
13.3 Sampling implements
13.4 Mass of solids in increments
13.5 Number of primary increments
13.6 Sampling procedures
14 Sampling of stationary slurries
15 Sample preparation procedures
15.1 General
15.2 Reduction mills
15.3 Sample division
15.4 Chemical analysis samples
15.5 Physical test samples
16 Packing and marking of samples
Annex A (informative) Examples of correct slurry devices
Annex B (informative) Examples of incorrect slurry sampling
devices
Annex C (normative) Manual sampling implements
Bibliography
Sets out the basic methods for sampling fine coal, coal rejects or tailings of nominal top size < 4 mm that is mixed with water to form a slurry.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes 05/30135096 DC. (11/2006)
|
| DocumentType |
Standard
|
| Pages |
44
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| ISO 20904:2006 | Identical |
| ISO 13909-4:2016 | Hard coal and coke — Mechanical sampling — Part 4: Coal — Preparation of test samples |
| ISO 13909-1:2016 | Hard coal and coke — Mechanical sampling — Part 1: General introduction |
| ISO 13909-7:2016 | Hard coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing |
| ISO 13909-8:2016 | Hard coal and coke — Mechanical sampling — Part 8: Methods of testing for bias |
| ISO 1213-1:1993 | Solid mineral fuels Vocabulary Part 1: Terms relating to coal preparation |
| ISO 13909-2:2016 | Hard coal and coke — Mechanical sampling — Part 2: Coal — Sampling from moving streams |
| ISO 18283:2006 | Hard coal and coke Manual sampling |
| ISO 13909-3:2016 | Hard coal and coke — Mechanical sampling — Part 3: Coal — Sampling from stationary lots |
| ISO 1213-2:2016 | Solid mineral fuels — Vocabulary — Part 2: Terms relating to sampling, testing and analysis |
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