ASTM D6609-2017 pdf free download

ASTM D6609-2017 pdf free download.Standard Guide for Part-Stream Sampling of Coal
1. Scope
1.1 This guide covers general principles for obtaining a gross sample ofcoal by taking increments from part ofa stream of coal rather than from the entire stream to be sampled. The usefulness of results from this guide will vary greatly depend- ing on such factors as top size of the coal, size consistency of the coal, variability of the coal, and such logistical factors as the flow rate ofthe coal in process and physical accessibility of the sampling station. 1.2 This guide should be used only when it is not possible to use a method of sampling that produces a probability sample. 1.3 Sample preparation procedures involving crushing are contained in Practice D2013. 1.4 The values stated in SI units are to be regarded as standard. The values 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory requirements prior to use. 1.6 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
5. Significance and Use
5.1 This guide provides instructions for sampling by col- lecting individual increments from part of a cross section of a moving stream of coal, as opposed to collection of individual increments by removal of a full cross section of material. The use of part-stream sampling, and the detailed procedures for each case, should be agreed upon in advance by all parties concerned. Samples collected by use of this guide are not probability samples. The user is cautioned that samples of this type do not satisfy the minimum requirements for probability sampling and as such cannot be used to obtain any meaningful statistical inferences such as the sampling precision, standard error, or bias. 5.2 All parties should be cautioned that manual sampling of coal from a moving stream might not enable sampling of the material that is furthermost from the point of entry into stream by the sampling device.
7. Organization and Planning of Sampling Operations
7.1 Considerations When Sampling from a Coal Stream: 7.1.1 Safety Considerations—If the sampling device is to be used manually, safety and ease ofoperation should be carefully considered. For example, aluminum can be used to minimize the weight of the device and special handles fabricated to facilitate its use. Shovels with loop handles should be used only with extreme caution. There is the potential to catch and drag the sampling device and sampler while manually sam- pling a moving stream. Sampling personnel should be pro- tected from moving parts such as conveyors or belt idlers. A safety harness for the sampling personnel may be an appropri- ate safety device in some sampling situations. The user of this guide must be aware that each sampling situation has its own unique safety requirements that should be thoroughly reviewed before the start of sample collection. This standard does not purport to address all safety requirements; however, users are urged to comply with all Federal requirements such as those contained in the Federal Mine Safety and Health Act of 1977, the Occupational Safety and Health Act of 1970, as well as state and local regulations and site specific safety policies and procedures. 7.1.2 Width ofSampling Device—The width ofthe sampling device shall be a minimum of 3 times the nominal top size of the coal being sampled. 7.1.3 Depth of Sampling Device—When determining the depth of the sampling device, two considerations are: (1) top size of the coal and (2) feed rate of the coal. The depth of the sampling device shall be sufficient so that it does not overfill during increment collection. Thus, the higher feed rate, the greater the depth required and the larger the increment ob- tained. The increment may become too large for one person to handle even at moderate to low feed rates.