ASTM E454-2009 8750 Standard Specification for Industrial Perforated Plate and Screens (Square Opening Series)《工业用多孔板及筛(方孔系列)标准规格》.pdf
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1、Designation: E454 09Standard Specification forIndustrial Perforated Plate and Screens (Square OpeningSeries)1This standard is issued under the fixed designation E454; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.INTRODUCTIONIndustrial perforated plate can be produc
3、ed in many thousands of combinations of size and shapeof opening, bar size, thickness of material, and type of metal. Such variety is often confusing and, tothe vast majority of perforated plate users, unnecessary, since each usually requires only a very fewspecifications.The purpose of this specifi
4、cation is to simplify this problem by a condensed table of recommendedspecifications covering a wide range of openings in which industrial perforated plate is made, withseveral recommended bar sizes and thicknesses of plate for each opening, for use in various grades ofservice.By making selections f
5、rom this standard, the user will be guided to specifications that are beingregularly produced, thus avoiding inadvertent selection of specifications that, because of little or nodemand, are unobtainable, except on special order (usually quite expensive unless the quantity orderedis sufficient to jus
6、tify the cost of special tooling).If a user has a specific application for industrial perforated plate that can not be solved by a selectionfrom this standard, it is recommended that he consult his perforated plate supplier on the availabilityof an acceptable alternative specification.1. Scope1.1 Th
7、is specification covers the sizes of square openingperforated plate and screens for general industrial uses, includ-ing the separating or grading of materials according to desig-nated nominal particle size, and lists standards for openingsfrom 5 in. (125 mm) to 0.127 (18 ) in. (3.35 mm) punched with
8、bar sizes and thicknesses of plate for various grades of service.Methods of checking industrial perforated plate and screens areincluded as information in the Appendix.1.2 This specification does not apply to perforated plate orscreens with round, hexagon, slotted, or other shaped openings.1.3 The v
9、alues stated in inch-pound units are to be regardedas e standard. The values given in parentheses are mathemati-cal conversions to SI units that are provided for informationonly and are not considered standard.The values stated ininch-pound units are to be regarded as the standard. The valuesgiven i
10、n parentheses are for information only.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 l
11、imitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E323 Specification for Perforated-Plate Sieves for TestingPurposes2.2 ISO Standards:3ISO 2194-1972, Wire Screens and Plate Screens for Indus-trial PurposesNominal Sizes of Apertures.ISO Recommendation R388-1964, Metric Series for Bas
12、icThicknesses of Sheet and Diameters of Wire.2.3 Other Documents:1This specification is under the jurisdiction 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 No
13、v. 1, 2009. Published December 2009. Originallyapproved in 1972. Last previous edition approved in 2004 as E454 80 (2004).DOI: 10.1520/E0454-09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards v
14、olume information, refer to the standards Document Summary page onthe ASTM website.3Available from International Organization for Standardization (ISO), 1, ch. dela Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http:/www.iso.ch.1Copyright ASTM International, 100 Barr Harbor Drive, P
15、O Box C700, West Conshohocken, PA 19428-2959, United States.Fed. Std. No. 123 Marking for Shipment (Civil Agencies)4Mil-Std-129 Marking for Shipment and Storage43. Terminology3.1 Definitions:3.1.1 aperture or opening, ndimensions defining an open-ing in a screen.3.1.2 bar, nmetal between perforation
16、s measured at thepoint where perforations are the closest.3.1.3 blank, nunperforated area located other than alongthe perimeter of a plate.3.1.4 break-out, nterm applied to the action that occursahead of the punch in its going through the plate.3.1.4.1 DiscussionThe fracturing of the material result
17、s ina tapered hole with the small dimensions on the punch side.3.1.5 centers, ndimensional sum of one perforation andone bar or the dimensional distance from the center of oneperforation to the center of an adjacent perforation.3.1.6 die side, nsurface of the plate that was against thedie during the
18、 punching operation.3.1.7 finished end pattern, ncondition that occurs withsome specifications of staggered pattern perforations as a resultof tool design in which the pattern is completed on both endsof the plate (Fig. 1).3.1.8 margin or border, nunperforated area located alongthe perimeter of a pl
19、ate.3.1.9 open area, nratio of the total area of the apertures tothe total area of the screen, usually expressed in percentage.3.1.10 perforation, naperture or opening produced bypunching.3.1.11 screen, n(1) surface provided with openings ofuniform size or (2) machine provided with one or more scree
20、nsurfaces.3.1.12 screening, vprocess of separating a mixture ofdifferent sizes by means of one or more screen surfaces.3.1.13 smooth side or punch side, nsurface of the platethat was uppermost during the punching operation and throughwhich the punch entered the plate.3.1.14 unfinished end pattern, n
21、condition that occurs withsome specifications of staggered pattern perforations as a resultof tool design.3.1.14.1 DiscussionOn one end of the plate, the patternwill appear to be incomplete as a result of unperforated holesin the even numbered rows, while on the other end of the sameplate, the patte
22、rn will appear to be incomplete because ofunperforated holes in the odd numbered rows (Fig. 1).4. Standard Specifications4.1 Standard specifications for industrial perforated plateand screens are listed in Table 1.4.2 OpeningsThe series of standard openings listed inTable 1 include those of the USA
23、Standard Sieve Series,Specification E323, and those of the ISO apertures for indus-trial plate screens, ISO 21941972, with the addition of thoseopenings in common usage.4.3 Relationship of GradesThe purpose of the severalgrades is to provide combinations of opening and bar size forvarious types of s
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