ASME PTC 21-1991

â??This standard is no longer an American National Standard or an ASME-approved standard. It is available for historical reference only.â?? The object of test is to determine the performance characteristics of equipment designed to collect particulate matter from a gas stream. This Code specifies methods for determining the performance of the equipment with regard to the following: (a) overall mass collection efficiency of the equipment; (b) particulate matter concentration at inlet and outlet of collector; (c) efficiency of collection according to size of particle; (d) resistance to gas flow, i.e., the total pressure drop across the equipment; (e) quantity of gas passing through the equipment; and (f) power consumption of the collection equipment. 1.2 The rules and instructions included in this Code are for the particulate matter collection equipment proper, as indicated by para. 1.1. If the scope of the test includes any auxiliary apparatus, it will be necessary to consult other ASME codes, as applicable. 1.3 The determination of the particulate matter count, extensively used as a measure of atmospheric particulate matter pollution, is outside the scope of this Code.