ASTM_D_5615_-_07e1.pdf

Designation:D5615071Standard 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.1NOTEAdded research report information to Section 10 editorially in November 2010.1.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 as thestandard.The values given in parentheses are for informationonly.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 and health practices and determine the applica-bility of regulatory limitations prior to use.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 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D1129.For descriptions of termsrelating to reverse osmosis,refer to Test Methods D4194 andD6161.4.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 gage pressure,25C and 22%conversion using an aqueous 300-mg/L sodium chloride solu-tion.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.6.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: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 June 15,2007.Published July 2007.Originallyapproved in 1994.Last previous edition approved in 2001 as D5615 95(2001).DOI:10.1520/D5615-07E01.2For 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 States1 6.2.1 Materials of construction shall preferably be of plasticor stainless steel(use 316 or better to minimize corrosion)forall wetted parts to prevent contamination of the feed solutionby corrosion products.Do not use reactive piping material suchas plain carbon steel,galvanized or cadmium-plated carbonsteel,and cast iron for piping.Ensure that no contaminationwill occur from oil films on new metal piping,release agentson raw plastic components,or feed solutions used in the systempreviously.Whether stainless steel or plastic,all pressurizedcomponents should be designed based on the manufacturersworking pressure rating.Review the manufacturers rating forcompliance with standard engineering practice.6.2.2 The reverse osmosis testing apparatus is representedschematically in Fig.1.It consists of a feed holding tanke