ISO INTERNATIONAL STANDARD 4798 First edition ANSi Internat Doe Sec 1997-05-01 Laboratory glassware Filter funnels Verrerie de laboratoire -Entonnoirs a filtrer ISO Reference number ISO 4798:1997(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 4798:1997(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. This Internationa! Standard ISO 4798 has been prepared by Technical Committee ISO/TC 48, Laboratory glassware and related apparatus, Subcommittee Sc 2, General laboratory glassware (otherthan measuring apparatus). Annex A of this International Standard is for information only. C1SO1997 All rights reserved. Unless otherwise specified, no part of this publication may be including photocopying and microfilm, without permission in writing from the publisher International OrganizationforStandardization Casepostale56.CH-1211Geneve20.Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; S=central Printed in Switzerland ii Standardizatior No reproduction or networking pemited without license from IHS Not for Resale ISO4798:1997(E) INTERNATIONALSTANDARD CISO Laboratory glassware --- Filter funnels 1 Scope This international Standard specifies requirements and dimensions for glass filter funnels suitable for general laboratory purposes,fitting together with other general-use glassware such as boiling flasksandvolumetricflasks. NOTE Annex A lists additional International Standards for other general-purpose laboratory glassware. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEc and iso maintain registers of currently valid InternationalStandards. ISO719:1985,Glass Hydrolytic resistance of glassgrains at 98C-Method of test and classification. IsO3585:1991,Borosilicateglass3.3-Properties 3 Types and sizes Two types of filter funnels are specified, in sizes as follows (given in millimetres): 3.1Plainfilterfunnelsofbowldiameter: 35-55-75-100-125-150-200 3.2 Analytical filter funnels of bowl diameter: 55-75-100 4 Material 4.1 When tested in accordance with the procedure and classification given in IsO 719, the glass shall comply with the requirements of class HGB3 or better. 1 No reproduction or networking pemitted without license from IHS Not for Resale