ASTM E1638-2011a Standard Terminology Relating to Sieves Sieving Methods and Screening Media《筛分 筛分方法 和筛网的相关标准术语》.pdf

1、Designation: E1638 11aStandard TerminologyRelating to Sieves, Sieving Methods, and Screening Media1This standard is issued under the fixed designation E1638; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision

2、. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONParticle size analysis through the use of standard test sieves, and particle separation through the useof screening media, are comm

3、only adopted methods of achieving desired process specificationsrelated to particles. To ensure a better understanding of sizing and separation systems and processesand to ensure appropriate comparison of data, terminology common to the processes must bedocumented and defined.For Subcommittee E29.01

4、 on Sieves, Sieving Methods, and Screening Media, this is an ongoingprocess of developing new related terms. Every effort has been made to ensure accuracy, precision,and clarity for the terms included. Suggestions and comments for additions, corrections, and revisionsare welcomed.1. Scope1.1 This te

5、rminology includes all those terms used in all ofthe standards under the jurisdiction of Subcommittee E29.01.Terms are defined that are related to the manufacture ofstandard test sieves and screening media, as well as termsrelated to the methods, analysis, procedures, and equipment forsizing and sep

6、arating particles.1.2 Committee E29 on Particle and Spray Characterizationfeels that it is essential to include terms and definitions explicitto the scope, regardless of whether the terms appear in existingASTM standards. Terms that are in common usage and appearin common-language dictionaries are g

7、enerally not included.2. Referenced Documents2.1 ASTM Standards:2E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE161 Specification for Precision Electroformed SievesE454 Specification for Industrial Perforated Plate andScreens (Square Opening Series)E674 Specification for Industrial

8、 Perforated Plate andScreens (Round Opening Series)E2016 Specification for Industrial Woven Wire ClothE2427 Test Method for Acceptance by Performance Testingfor SievesE2589 Terminology Relating to Nonsieving Methods ofPowder Characterization2.2 ASTM Manuals:2ASTM STP 447B Manual on Testing Seiving M

9、ethods3. Significance and Use3.1 This terminology contains terms used in the descriptionand procedure of analysis of the size of particulate materialsthrough sieve analysis with standard testing sieves and isapplicable to the work of many ASTM technical committees.For a composite listing of publishe

10、d ASTM standards usingstandard testing sieves, refer to ASTM STP 447B.3.2 While some of the terms appearing in this terminologymay also be used in the description, procedure, and endproducts of production screening (either on a batch-fed orcontinuous basis), it is the intent of this terminology to p

11、resentthe definitions and usage of terms strictly in the context ofsieve analysis using standard testing sieves.4. Terminology4.1 Definitions:agglomerate, ntwo or more particles adhering together.E1638aperture, nthe opening in a screening or sieving medium.E111This terminology is under the jurisdict

12、ion ofASTM Committee E29 on Particleand Spray Characterization and is the direct responsibility of Subcommittee E29.01on Sieves, Sieving Methods, and Screening Media.Current edition approved Nov. 15, 2011. Published December 2011. Originallyapproved in 1994. Last previous edition approved in 2011 as

13、 E1638 11. DOI:10.1520/E1638-11A.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.1Copyright ASTM Internationa

14、l, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.aperture size, nthe dimension defining an opening in ascreening or sieving medium. E11bar, nthe metal between perforations. E454, E674blank, nan unperforated area located other than along theperimeter of a plate.

15、E454, E674bolting grade wire cloth, nwire cloth meeting a group ofspecifications that are typical for higher sifting capacitiesand which can speed the bolting action of vibratory screen-ing machines, manufactured based on using a limited num-ber of wire diameters for a large group of mesh designatio

16、ns.E2016DISCUSSION“Bolting Grade” designations are often misused; andshould not be specified without a wire diameter, as the designationshave become non-standard.break-out, va term applied to the action that occurs ahead ofthe punch in its going through the plate. E454, E674DISCUSSIONThe fracturing

17、of the material results in a tapered holewith the small dimensions on the punch side.bulk density, nthe mass per unit volume of a material,including voids inherent in the material as tested. E1638calibration test sieve, na test sieve manufactured usingsieve cloth which has been inspected after being

18、 mounted inthe sieve frame, and that meets the requirements in accor-dance with Specification E11, Table 1, in part based on thestandard deviation of the number of sample openings in thetest sieve (Column 11) not exceeding the maximum allow-able for a confidence level of 99.73 % (Column 12). E11cent

19、ers, nthe dimensional sum of one perforation and onebar, or the dimensional distance from the center of oneperforation to the center of an adjacent perforation.E454, E674compliance test sieve, na test sieve manufactured usingsieve cloth which has been inspected prior to being mountedin the sieve fra

20、me, and that meets the requirements inaccordance with Specification E11, Table 1, in part based onthe standard deviation of the required number of sampleopenings per 100 square feet of sieve cloth (column 7) notexceeding the maximum allowable for a confidence level of66 % (column 8). E11crimp, nthe

21、corrugation in the warp or shute wire, or both.E11, E2016DISCUSSIONThe crimp in the wires is formed either during theweaving process, or with a crimping machine prior to weaving. Ifformed during the weaving process, the tension existing between thewarp and the shute wires fundamentally determines th

22、e respectiveamount of depth of crimp, which locks the wires in place and in partestablishes the firmness of the sieve cloth.cumulative oversize distribution graph, na graph obtainedby plotting the total (cumulative) percentage by the massretained on each of a set of sieves versus the correspondingap

23、erture sizes. E1638cumulative undersize distribution graph, na graph ob-tained by plotting the total (cumulative) percentage by themass passing each of a set of sieves versus the correspondingaperture sizes. E1638die side, nthe surface of the plate that was against the dieduring the punching operati

24、on. E454, E674double crimp wire cloth, nwire cloth woven with approxi-mately equal corrugations in both the warp and shute wiresto lock the wires in position. E11, E2016electroformed mesh, nelectrodeposited grid material con-sisting of precision openings used as the base material forelectroformed si

25、eves. E161electroformed sieves, nsee test sieves (electroformed).E161endpoint, npoint at which no more material falls through thesieve concluding the sieving, taking into account sampledegradation. E2427finished end pattern, nthe condition that occurs with somespecifications of staggered pattern per

26、forations as a result oftool design where the pattern is completed on both ends ofthe plate. E454, E674firmness, na subjective term referring to the planar rigidityof wire cloth (as a roll good, not mounted in a frame).E11, E2016DISCUSSIONFirmness is established by the tensile strength of themateria

27、l, the relationship of the mesh to wire diameters, the type ofweave, and amount of crimp in the wires. The absence of firmness inwire cloth is termed sleaziness.flat top wire cloth, nwire cloth with deep crimps, as in lockcrimp, except that all crimps are on the under side of thecloth, leaving the t

28、op surface all in one plane. E2016DISCUSSIONSometimes designated smooth top.gage (also gauge), na number designating a specific thick-ness of metal sheet tabulated in a standardized series, each ofwhich represents a decimal fraction of an inch. E454inspection test sieve, na test sieve manufactured u

29、sing sievecloth which has been inspected after being mounted in thesieve frame, and that meets the requirements in accordancewith Specification E11, Table 1, in part based on the standarddeviation of the required number of sample openings in thetest sieve (Column 9) not exceeding the maximum allowab

30、lefor a confidence level of 99 % (Column 10). E11intermediate crimp wire cloth, nprecrimped wire clothwith extra crimps or corrugations between the points ofintersection. E2016DISCUSSIONSometimes designated intercrimp or multiple crimp.lock crimp wire cloth, nprecrimped wire cloth with deepcrimps at

31、 the points of intersection to lock the wires securelyin place. E2016margin or border, nan unperforated area located along theperimeter of a plate. E454, E674market grade wire cloth, nwire cloth meeting a group ofspecifications that are typical for use in the general industrialmarket, manufactured b

32、ased on using a different wire diam-eter for each of the common mesh designations. E2016DISCUSSION“Market Grade” designations are often misused; andshould not be specified without a wire diameter, as the designationshave become non-standard.E1638 11a2matched test sieve, na test sieve that reproduces

33、 theperformance results of another test sieve within user definedlimits for a designated material (for information only andmay not be in compliance with Specification E11). E11median particle size, nthe particle size at which half thedistribution (by mass, volume, number, etc.) is larger thanand hal

34、f smaller than the stated size. E1638, E2589mesh, nthe number of wires or openings per linear inch(25.4 mm), counted from the center of any wire to a pointexactly one inch (25.4 mm) distant, including the fractionaldistance between either thereof. E11, E2016mill grade wire cloth, nwire cloth meeting

35、 a group ofspecifications that are typical for milling grain and otherlight screening, manufactured based on using a different wirediameter for each of the common mesh designations.E2016DISCUSSION“Mill Grade” designations are often misused; andshould not be specified without a wire diameter, as the

36、designationshave become non-standard.near size particle, na particle of a size approximately equalto the aperture size of the sieve that may block an opening.E1638non standard frames (electroformed), nsieve frames otherthan as specified in accordance with Table 2 of SpecificationE161 that may be cir

37、cular, square, rectangular, or non-metal.E161DISCUSSIONThe frame may have the electroformed sheet perma-nently attached, or it may be designed so the electroformed sheet isreplaceable.non standard frames (wire cloth), nsieve frames other thanas specified in accordance with Table 2 of Specification E

38、11that may be circular, square, rectangular, or non-metal.E11DISCUSSIONThe frame may have the sieve cloth permanentlyattached, or it may be designed so the sieve cloth is replaceable.pan (also collection pan), na device that collects all of thematerial that has passed the sieving process, typically

39、usedon the bottom of the sieve stack. E161, E2427particle size distribution, nin sieve analysis, the percent-ages, by mass or number, of all fractions into which varioussizes of particles are classified. E1638percent open area, nthe ratio of the area of the openings tothe total area expressed as a p

40、ercentage, that theoreticallycan be calculated as follows for wire cloth: E2016OA 5 1MwDw!1MsDs!100!where:OA = the percent open area,Mw= the mesh warp,Ms= the mesh shute,Dw= the diameter warp wire, andDs= the diameter shute wire.percent retained, nmass fraction percentage of material thatis left upo

41、n or retained by the sieve after the test has beenperformed. E2427perforated pattern, nthe pattern that the perforations arearranged in, usually in a staggered pattern with midpointsnominally at the vertices of isosceles triangles or squarepatterns arranged in line with their midpoints nominally att

42、he vertices of squares. E454plain weave, nsee types of weaves, plain.precrimp, nwire cloth woven with both the warp and shutewires crimped before weaving. E11rectangular (off-count) mesh, nEither precrimp or doublecrimp wire cloth having a different number of wires in thewarp and shute, producing re

43、ctangular openings; the diam-eter of the warp and shute wires may be the same ordifferent. E2016representative sample, na sample taken from a quantity ofmaterial that exhibits the characteristics of the originalmaterial from which it was taken. E1638screen, n(1) surface provided with apertures of un

44、iform sizeand shape; (2) another term used interchangeably for wovenwire cloth; (3) a machine provided with one or more screensurfaces. E674, E2016screening, vprocess of separating a mixture of different sizesby means of one or more screen surfaces. E454, E674selvage, nthe edge or border of wire clo

45、th finished off so asto prevent unraveling; examples of finished edges includelooped selvage, folded selvage, cut and tucked, welded,plastic bonded, and bent-back picket, as opposed to a raw orcut edge. E2016shute wires, nthe wires running the short way of, or acrossthe cloth as woven (also referred

46、 to as the shoot, fill, or weftwires). E2016sieve, nan apparatus consisting of a media with regularlyspaced apertures of uniform size, mounted in a suitableframe or holder, for use in separating material according tosize. E11, E1638sieve analysis, nthe act of obtaining a particle size distribu-tion

47、using test sieves. E1638sieve cloth, nwoven wire cloth conforming to SpecificationE11. E11sieve shaker, nthe mechanical device or method used toshake the sieves, excluding hand sieving. E2427sleaziness, nwire cloth that does not exhibit firmness.E11, E2016smooth side or punch side, nthe surface of t

48、he plate thatwas the uppermost during the punching operation andthrough which the punch entered the plate. E454, E674space cloth, nwire cloth that is designated by the width ofthe open spaces between the inside faces of adjacent parallelwires, expressed in inches or the metric equivalent. E2016squar

49、e mesh, nwire cloth having the same number of wiresin both the warp and shute. E11, E2016test sample, na quantity of material required for use directlyin a testing procedure. E1638test sieve (electroformed), na sieve manufactured by mount-ing electroformed material consisting of high precisionopenings in a frame, designed for use in particle size analysisby sieving. E161test sieve (perforated plate), na sieve manufactured bymounting perforated plate in a frame, designed for use inparticle size analysis by siev