1、Designation:D2589/D2589M88(Reapproved 2011)1Standard Test Method forMcNett Wet Classification of Dual Asbestos Fiber1This standard is issued under the fixed designation D2589/D2589M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the
2、 year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEUnits information was editorially corrected in February 2012.1.Scope1.1 This test method covers the determination of the
3、 lengthdistribution and fines content of milled asbestos fiber by wetclassification employing the McNett fiber classifier.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachs
4、ystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 WarningBreathing of asbestos dust is hazardous.Asbestos and asbestos products present demonstrated healthrisks for users and for those with whom they come into conta
5、ct.In addition to other precautions,when working with asbestos-cement products,minimize the dust that results.For informa-tion on the safe use of chrysotile asbestos,refer to“Safe Use ofChrysotile:A Manual on Preventive and Control Measures.”21.4 This standard does not purport to address all of thes
6、afety 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:3D2590 Test Method for Sampling Ch
7、rysotile AsbestosD2946 Terminology for Asbestos and AsbestosCementProductsD3639 Test Method for Classification of Asbestos by Que-bec Standard TestD3879 Test Method for Sampling Amphibole Asbestos(Withdrawn 2009)4E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE177 Practice for Use o
8、f the Terms Precision and Bias inASTM Test Methods2.2 ASTM Adjunct:Screen Clearing Device Drawings53.Terminology3.1 DefinitionsTerms relating to asbestos are defined inTerminology D2946.4.Significance and Use4.1 Normally,results obtained by this test method arereproducibleundercomparablelaboratoryco
9、nditions.However,it must not be expected that results obtained bydifferent operators at various laboratories and times will be inexact agreement due to some seemingly minor proceduralchange.Moreover,results for longer fiber grades are influencedto a greater extent by differences in fiber length dist
10、ribution andcharacteristics than those of shorter grades.5.Apparatus5.1 McNett Fiber Classifier(such as 203-A or 203-CA),6preferably equipped with vacuum suction cups for drainage,similar in design to that shown in Fig.1,or on page 7 of theService Manual 203-CA(see service manuals for identification
11、of classifiers parts).NOTE1Drainage through muslin filter cloths or 200-mesh sieve(325-mesh for float products)is acceptable.5.2 Accessories:5.2.1 Filter paper,to fit suction cups on classifier.This shallbe thin,rapid filtering,ashless paper hardened to provide1This test method is under the jurisdic
12、tion of ASTM Committee C17 onFiber-Reinforced Cement Productsand is the direct responsibility of SubcommitteeC17.03 on Asbestos-Cement Sheet Products and Accessories.Current edition approved Nov.1,2011.Published February 2012.Originallyapproved in 1967.Last previous edition approved in 2006 as D2589
13、 88(2006)1.DOI:10.1520/D2589_D2589M-88R11E01.2Available from The Asbestos Institute,http:/ 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
14、 onthe ASTM website.4The last approved version of this historical standard is referenced onwww.astm.org.5Available from ASTM International Headquarters.Order Adjunct No.ADJD2589.Original adjunct produced in 1967.6Currently supplied classifier Model 203-CA and service manuals for theinstallation,oper
15、ation and maintenance of Models 203-A and 203-CA are availablefrom the Bauer Bros.Co.Ltd.,Brantford,ON,Canada,or Springfield,OH.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 adequate wet strength and resistance to washing.Alternatively,
16、325-mesh screen cloths mounted in suitable metal rings mayreplace filter papers(see Note 5 in 11.5.4).5.2.2 T-Shaped Soft Rubber Scraper,for cleaning screens,made from a 10-cm 4-in.length of automobile windshieldwiper,or equivalent,held in a suitable handle,similar to a hoe.5.2.3 Rubber Hose,6-mm 14-in.bore with control valvenozzle for rinsing classifier screens and tanks with filteredwater.5.2.4 Drying Oven,(convection type,or mechanical draft),or infrared drying unit.5.2.5 Automatic Overflow A
