ASTM_D_5615_-_20.pdf

Designation:D561520Standard Test Method forOperating Characteristics of Home Reverse OsmosisDevices1This standard is issued under the fixed designation D5615;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers determination of the operatingcharacteristics of home reverse osmosis devices using standardtest conditions.It does not necessarily determine the charac-teristics of the devices operating on natural waters.1.2 This test method is applicable for spiral-wound devices.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility 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.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D512 Test Methods for Chloride Ion In WaterD1125 Test Methods for Electrical Conductivity and Resis-tivity of WaterD1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD1293 Test Methods for pH of WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD4194 Test Methods for Operating Characteristics of Re-verse Osmosis and Nanofiltration DevicesD4516 Practice for Standardizing Reverse Osmosis Perfor-mance DataD6161 Terminology Used for Microfiltration,Ultrafiltration,Nanofiltration,and Reverse Osmosis Membrane Processes3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this standard,refer toTerminology D1129.3.1.2 For descriptions of terms relating to reverse osmosis,refer to Test Methods D4194 and Terminology D6161.4.Summary of Test Method4.1 This test method consists of determining the permeateflow rate and sodium chloride rejection for reverse osmosisdevices at 345-kPa(50-psi)feed gauge pressure,25C and22%conversion using an aqueous 300-mg/L sodium chloridesolution.5.Significance and Use5.1 Home reverse osmosis devices are typically used toremove salts and other impurities from drinking water at thepoint of use.They are usually operated at tap water linepressure,with water containing up to several hundred milli-grams per litre of total dissolved solids.This test methodpermits measurement of the performance of home reverseosmosis devices using a standard set of conditions and isintended for short-term testing(less than 24 h).This testmethod can be used to determine changes that may haveoccurred in the operating characteristics of home reverseosmosis devices during use,but it is not intended to be used forsystem design.This test method does not necessarily determinethe devices performance when solutes other than sodiumchloride are present.Use Practice D4516 and Test MethodsD4194 to standardize actual field data to a standard set ofconditions.5.2 This test method is applicable for spiral-wound devices.1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.08 on Membranes and IonExchange Materials.Current edition approved May 1,2020.Published May 2020.Originallyapproved in 1994.Last previous edition approved in 2007 as D5615 071whichwas withdrawn July 2016 and reinstated in May 2020.DOI:10.1520/D5615-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.16.Apparatus6.1 The apparatus for the test method is described schemati-cally in Fig.1.A conductivity meter can be used to determinethe salt concentration in accordance with Test Methods D1125.6.2 Installation:6.2.1 Materials of construction shall preferably be of plasticor stainless steel(use 316 or better to minimize corrosion)forall wetted parts t