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Norm
ISO 4793:1980
Issue date: 1980 10 01
Laboratory sintered (fritted) filters — Porosity grading, classification and designation
Filters are graded according to their pore size index in one of the eight classes specified. This is applicable to laboratory filters made of glass, vitreous silica, cera...
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Valid
Publisher:
International Organization for Standardization
Format:
Digital | 7 Pages
Language:
English
ICS
Filters are graded according to their pore size index in one of the eight classes specified. This is applicable to laboratory filters made of glass, vitreous silica, ceramics, metals and plastic materials. Annex A specifies a method for determination of pore size index. Annex B and C concern with a procedure for assessing uniformity of filters and for determination of air permeability.