1、Designation:D375/D375M95(Reapproved 2009)1Standard Specification forAsbestos Roving1This standard is issued under the fixed designation D375/D375M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in
2、parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEUnits information was corrected editorially in March 2010.1.Scope1.1 This specification covers asbestos roving having aminimum of 75 mass%asbestos fiber,e
3、xcluding the mass ofother inorganic reinforcing strands which may be present.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,eachsystem shall be used independently of the othe
4、r.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 contact.In addition to other precautions,when work
5、ing with asbestos-cement products,minimize the dust that results.For informa-tion on the safe use of chrysoltile asbestos,refer to“Safe Useof Chrysotile Asbestos:A Manual on Preventive and ControlMeasures.”21.4 The following safety hazards caveat pertains only to thetest methods,Section 13,described
6、 in this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.F
7、or specific safety hazard warning,see 1.3.2.Referenced Documents2.1 ASTM Standards:3D76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD861 Practice for Use of the Tex System to Designate LinearDensity of Fibers,Yarn Intermediates,and YarnsD1118 Test Meth
8、od for Magnetic Rating of Asbestos Fiberand Asbestos TextilesD1918 Test Method for Asbestos Content of Asbestos Tex-tilesD2100 Specification for Asbestos Textiles Used for Electri-cal Insulating PurposesD2260 Tables of Conversion Factors and Equivalent YarnNumbers Measured in Various Numbering Syste
9、msD2946 Terminology for Asbestos and AsbestosCementProducts3.Terminology3.1 For definitions of other textile terms used in thisspecification,refer to Terminology D123.For asbestos terms,refer to Terminology D2946.3.2 Definitions:3.2.1 asbestos fiber,nthe hydrous magnesium silicateserpentine mineral
10、designated as chrysotile and having theempirical formula Mg3Si2O5(OH)4.3.2.2 asbestos roving,nan assemblage of carded asbestos,with or without other fibers,rubbed into a single strand withouttwist.3.2.3 asbestos roving construction number,na systemdesigned to show the construction,namely,the cut of
11、the singleroving and whether reinforcements are present.3.2.3.1 DiscussionRovings up to 9-cut,inclusive,have3-digit construction numbers:the first digit indicates the cut,the second digit,the number of plies(always 1),and the thirddigit,the number of reinforcements.Rovings of 10-cut andover have 4-d
12、igit construction numbers;the first 2 digitsindicate the cut,the third digit,the number of plies(always 1),and the fourth digit,the number of reinforcements.Rovings containing reinforcements are designated by theroving construction number followed by the description of thereinforcing strand.1This sp
13、ecification is under the jurisdiction 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.1,2009.Published March 2010.Originallyapproved in 1933.Last previous edi
14、tion approved in 2004 as D375 95(2004)1.DOI:10.1520/D0375_D0375M-95R09E01.2Available 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 st
15、andards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Examples:No.1010 roving10-cut,no reinforcementNo.1011 roving10-cut,1 reinforcement(as specified)When wire is the reinforcement,the cut indica
16、tes the linear density of asbes-tos roving only(mass of the wire not included).When the reinforcement is otherthan wire,the cut indicates the linear density of the complete assembly.3.2.4 atmosphere for testing asbestos textiles,nair main-tained at a relative humidity of 50 6 2%at 21 6 1C.3.2.5 cut,nin asbestos,the number of 201.6 lengths perkilogram 100-yd lengths per pound 453.6 g 7000 grains ofasbestos roving.3.2.5.1 DiscussionThe term“cut”represents a length-per-unit-mass unit,and is derived
