Foreword

Hauptteil

1Scope

2Normative references

3Terms and definitions

4Establishing a sampling scheme

4.1General

4.1.1Sampling

4.1.2Sampling scheme

4.1.3Parameters

4.1.4Sampling methods

4.2Design of the sampling scheme

4.2.1General

4.2.2Coal or coke to be sampled and considerations for sampling

4.2.3Division of lots

4.2.4Precision of results

4.2.5Bias of results

4.2.6Requirements for test samples

4.3Precision of sampling

4.3.1General

4.3.2Precision and total variance

4.3.3Primary increment variance

4.3.4Sub-lot variance

4.3.5Preparation and testing variance

4.3.6Number of sub-lots and number of increments per sub-lot

4.3.6.1General

4.3.6.2Number of increments

4.3.6.3Mass of increments

4.3.7Minimum mass of samples for general analysis and determination of total moisture content

4.4Checking the overall precision for the lot by calculation and selection of sampling scheme

4.5Determination of acquired precision by replicate sampling

4.5.1General

4.5.2Method and calculation

4.5.3Precision obtained using normal sampling scheme

4.6Size analysis

5Methods of sampling

5.1General

5.2Sampling by time interval (time-basis sampling)

5.3Sampling by mass interval (mass-basis sampling)

5.4Stratified random sampling

5.4.1General

5.4.2Stratified random sampling by time interval

5.4.3Stratified random sampling by mass interval

5.5Extracting the increment

5.6Coal or coke in motion

5.6.1General

5.6.2Stopped belt

5.6.3Falling stream

5.6.4Moving belt

5.6.5Stockpiles (building/reclaiming)

5.6.6Grabs/front-end loaders

5.6.7Barges/trucks/railcars/wagons (loading/unloading)

5.7Moisture/common sample

5.8Different coals or cokes

5.9Random selection of increments

6Sampling equipment

6.1General

6.2Examples

6.2.1Ladles

6.2.2Shovels

6.2.3Scoops

6.2.4Probes

6.2.5Manual cutter

6.2.6Stopped-belt sampling frame

7Handling and storage of samples

7.1Sample size

7.2Time

7.3Divided sample

7.4Containers

7.5Moisture loss/breakage or degradation

7.6Identification/labelling

8Sample preparation

8.1General

8.2Constitution of a sample

8.3Division

8.3.1General

8.3.2Mechanical methods

8.3.2.1General

8.3.2.2Rotary dividers

8.3.2.3Division of samples

8.3.3Manual methods

8.3.3.1Riffle method

8.3.3.2Flattened-heap method

8.3.3.3Strip-mixing and splitting method

8.4Reduction

8.4.1General

8.4.2Reduction mills

8.5Mixing

8.6Air-drying of coal

8.7Coal — Preparation of test samples

8.7.1Types of test samples

8.7.2Preparation of samples for determination of total moisture content

8.7.3Preparation of samples for general analysis

8.7.4Common samples

8.7.5Preparation of size-analysis sample

8.7.6Preparation of samples for other tests

8.7.7Reserve sample

8.8Coke — Preparation of test samples

8.8.1Types of test samples

8.8.2Preparation of coke samples for determination of total moisture content

8.8.2.1General

8.8.2.2Procedure

8.8.2.3Wet samples

8.8.2.4Reduction of total moisture test sample

8.8.2.5Division

8.8.2.6Determination of total moisture content

8.8.2.7Reserve sample

8.8.3Preparation of samples for general analysis

8.8.3.1General

8.8.3.2Preparation errors

8.8.3.3Reduction

8.8.3.4Division

8.8.4Storage

8.8.5Physical test sample

8.8.6Samples for special properties

8.8.7Reserve sample

9Packing and marking of samples

10Sampling report