ASTM E959-83(R2018) pdf free download

ASTM E959-83(R2018) pdf free download.Standard Test Method for Characterizing the Performance of Refuse Size-Reduction Equipment
1. Scope
1.1 This test method covers measuring the performance of solid waste size-reduction equipment. 1.2 This test method can be used to measure the flow (that is, throughput) of solid waste through the size-reduction equipment, energy usage of the size-reduction device, and particle size of the shredded product. 1.3 This test method includes instructions for measuring energy usage, solid waste throughput, net processing time, and particle size distribution. 1.4 This test method applies only to size-reduction equip- ment that produces a shredded product with a size correspond- ing to 90 % cumulative passing in the range of 0.5 to 15 cm (0.2 to 6 in.) on an air-dry weight basis. For material with nominal sizes outside of this range, the precision and bias statements for particle size designation (Section 14) may not apply. 1.5 This test method can be applied to size-reduction equipment located anywhere within a processing line. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6.1 Exception—The values given in parentheses are for information only. 1.7 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 of regulatory limitations prior to use. See Section 7 for specific hazard information. 1.8 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.
4. Summary of Test Method
4.1 The duration of the test period is established and refuse is prepared for processing. 4.2 An energy measuring system is installed. 4.3 Solid waste is processed through the size-reduction equipment, energy usage and throughput are measured, and samples for analysis of product particle size distribution are collected. 4.4 Average throughput, power requirements, specific energy, and particle size ofthe shredded product are calculated. 4.5 Two methods (Time-Averaged Throughput Method and Discrete Throughput Method (Section 10)) for measuring the performance of size-reduction equipment are described. The selection of a particular method is governed by the layout of the processing equipment, the location of the size-reduction equipment relative to the other processing equipment, and the preference of the parties conducting the test.
5. Significance and Use
5.1 Throughput, power and energy requirements, and prod- uct size are key parameters that describe the operation and performance of solid waste size-reduction equipment. 5.2 This test method can be used to determine if the size-reduction equipment is operating within specifications and meeting performance criteria. 5.3 Having determined the parameters given in 5.1, the equipment that has been subjected to the test may be compared to other equipment similarly tested in order to establish relative levels of performance among equipment. 5.4 The basic test period is a continuous 2 to 4-h duration. The use of several test periods may be warranted to adequately assess the performance of size-reduction equipment.
7. Hazards
7.1 The test procedure described in 11.4 requires the re- moval of shredded material from a stopped conveyor belt by test personnel. Precautions should be taken to ensure that the belt cannot be started while occupied. These precautions consist oflockout ofthe electrical power to the conveyor, ready access to a safety “stop” cord located on the conveyor, or both. 7.2 This test method requires installation of electrical me- tering equipment. Consequently, the precautions described in Test Method E929 should be observed. 7.3 Gross samples should be collected sufficiently far from the size-reduction equipment such that test personnel are protected from potential explosions and flying objects from the equipment.