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This specification covers the requirements for design and construction of electroformed sieves. These sieves are used to perform particle-size distribution analysis and in preparing narrowly designated particle-size fractions. They may also be used as reference standards when suitably calibrated. The material used in the manufacture of the sieve sheet shall be nickel or a metal suitable for electrodeposition in a firm crystalline structure. The sheet shall have square or round openings with straight uniform sides and smooth, flat surfaces except for a slight bevel along the edges of the openings. Frames for precision electroformed sieves shall be made from non-corrosive material such as brass or stainless steel, and constructed in such a manner as to be rigid.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers the requirements for design and construction of electroformed sieves. These sieves are used to perform particle-size distribution analysis and in preparing narrowly designated particle-size fractions. They may also be used as reference standards when suitably calibrated. A method of calibrating these sieves is included in Annex A1.
Note 1—Complete instructions and procedures on the use and calibration of testing sieves are contained in ASTM Manual 32. This publication also contains a list of all published ASTM Standards on sieve analysis procedures for specific materials or industries.
1.2 The sieve analysis results from two testing sieves of the same sieve designation may not be the same because of the variances in sieve opening permitted by this specification. To minimize the differences in sieve analysis results, the use of testing sieves matched on a performance basis is suggested.
1.3 The values stated in SI units shall be considered standard for the dimensions of the electroformed mesh openings and the size of the wires in the electroformed mesh. The values stated in inch-pound units shall be considered standard with regard to the sieve frames.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C430 Test Method for Fineness of Hydraulic Cement by the 45-m (No. 325) Sieve
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E323 Specification for Perforated-Plate Sieves for Testing Purposes
E1638 Terminology Relating to Sieves, Sieving Methods, and Screening Media
ISO StandardISO565 Test sieves--Metal Wire Cloth, Perforated Plate and Electroformed Sheet-Nominal Aperture Sizes
ICS Number Code 25.220.20 (Surface treatment)
UNSPSC Code 41105003(Test sieves)