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Standard Practice for Standardizing Reverse Osmosis Performance Data (Includes all amendments and changes 11/26/2019).
Přeložit název
NORMA vydána dne 1.11.2019
Označení normy: ASTM D4516-19a
Datum vydání normy: 1.11.2019
Kód zboží: NS-976702
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
actual operating conditions, coefficient of performance, membranes, permeate flow, reverse osmosis, RO performance, salt passage, standard operating conditions,, ICS Number Code 71.120.99 (Other equipment for the chemical industry)
Significance and Use | ||||||
5.1 During the operation of an RO system, system conditions such as pressure, temperature, conversion, and feed concentration can vary, causing permeate flow and salt passage to change. To effectively evaluate system performance, it is necessary to compare permeate flow and salt passage data at the same conditions. Since data may not always be obtained at the same conditions, it is necessary to convert the RO data obtained at actual conditions to a set of selected constant conditions, thereby standardizing the data. This practice gives the procedure to standardize RO data. 5.2 This practice can be used for both spiral wound and hollow fiber systems. 5.3 This practice can be used for a single element or a multi-element system. However, if the RO system is brine staged, that is, the brine from one group of RO devices is the feed to a second group of RO devices, standardize the permeate flow and salt passage for each stage separately. 5.4 This practice is applicable for RO systems with high rejections and with no significant leaks between the feed-brine and permeate streams. |
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1. Scope | ||||||
1.1 This practice covers the standardization of permeate flow, salt passage, and coefficient of performance data for reverse osmosis (RO) systems. 1.2 This practice is applicable to waters including brackish waters and seawaters but is not necessarily applicable to waste waters. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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2. Referenced Documents | ||||||
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