ASTM_D_7601_-_10.pdf

Designation:D760110Standard Practice forPressure Driven Membrane Separation Element/BundleEvaluation1This standard is issued under the fixed designation D7601;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 practice covers the inspection,performance testing,autopsy and analytical work associated with evaluating pres-sure driven membrane separation elements(MF,UF,NF andRO).1.2 This practice is applicable for elements when newlymanufactured or at any time during their operation in a watertreatment facility.The Analytical section covers only mem-brane surface and foulant analyses.1.3 The data derived from these tests should be evaluatedversus newly manufactured elements/bundles or against oper-ating systems when they were initially brought on-stream,orboth.Industry norms can also be used for comparative pur-poses.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:2D1129 Terminology Relating to WaterD3923 Practices for Detecting Leaks in Reverse Osmosisand Nanofiltration DevicesD4194 Test Methods for Operating Characteristics of Re-verse Osmosis and Nanofiltration DevicesD4472 Guide for Recordkeeping for Reverse Osmosis andNanofiltration SystemsD4516 Practice for Standardizing Reverse Osmosis Perfor-mance DataD5090 Practice for Standardizing Ultrafiltration PermeateFlow Performance DataD6161 Terminology Used for Microfiltration,Ultrafiltration,Nanofiltration and Reverse Osmosis Membrane ProcessesD6908 Practice for Integrity Testing of Water FiltrationMembrane SystemsD7285 Guide for Recordkeeping Microfiltration and Ultra-filtration Systems3.Terminology3.1 For definitions of terms used in this practice,refer toTerminology D1129 and Terminology D6161.4.Summary of Practice4.1 This practice discusses the inspection of the pressuredriven membrane separation elements required for individualunits to be readied for a visual inspection or an autopsy that canbe performed to ascertain structural integrity(Practice D6908)and cleanliness.Visual inspection is non-destructive testing;autopsy requires the dismantlement of the element.4.2 Performance testing of an element are discussed that canbe accomplished on or off line,in a single or multi-elementhousing under conditions proscribed by the user or elementmanufacturer or Test Methods D4194.The data collected(Guides D4472 and D7285)must then be normalized(PracticesD4516 and D5090)to a set of conditions that permit theelements performance to be compared to an as-new unit.4.3 Laboratory analyses are presented that include visual,usually non-destructive,as well as specialized instrumentation,usually destructive testing.5.Significance and Use5.1 Water treatment membrane devices can be used toproduce potable water from brackish supplies and seawater aswell as to upgrade the quality of industrial water.This standardpermits the evaluation of the integrity and performance ofmembrane elements using visual observations and standardsets of conditions and are for short-term testing(24 h).Thisstandard can be used to determine changes that may haveoccurred in the operating characteristics of elements but are notintended to be used for plant design.1This practice is under the jurisdiction of ASTM Committee D19 on Water andis the direct responsibility of Subcommittee D19.08 on Membranes and IonExchange Materials.Current edition approved May 1,2010.Published June 2010.DOI:10.1520/D7601-10.2For 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.Tests6.1 Physical Inspection:6.1.1 Spiral Wound Elements:6.1.1.1 Disconnect element housing from the operatingsystem and remove element to be inspected from housing,placing it on a work table.6.1.1.2 Examine the element for cracked or dislodged,orboth,end caps,telescoping,discolored scrolls,fiberglass dis-coloration and cracks,contaminants on fiberglass surface andin product tube,and any other abnormalities.6.1.1.3 Weigh element and compare to the nominal as-newunit weight supplied by the manufacturer.6.1.1.4 Record findings.6.1.1.5 If element is to be reinserted into operating systemor other flow tests are to be performed at a later time,visualtesting should not be too long as to dry out the element.6.1.2 Hollow Fiber Elements:6.1.2.1 Visual Ins