NTERNATIONAL STANDARD (ISO) 4799 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXIYHAPOAHA OPrAH3ALWR nO CTAHAAPTW3ALWW-ORGANISATION INTE RNATIONALE DE NORMALISATION ANsl Inrernat Doc Sect Laboratory glassware - Condensers Verrerie de laboratoire - Refrigerants First edition - 1978-11-15 NUV 2 7 1978 UDC 542.231 Ref. No. ISO 4799-1978 (E) Descriptors : laboratory equipment, taboratory glassware, coolers, condensers (liquefiers), specifications, dimensions, marking. Price based on 6 pages Copyright International Organization for Standardization workingpermittedwithout licensefrom IHS Not for Resale 2. FOREWORD ISo (the Internationai Organization for Standardization) is a worldwide federation of national standards institutes (isO member bodies). The work of developing international Standards is carried out through isO technical committees. Every member body interested in a subject for which a technical committee has been set up 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. Draft international Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International Standard 1sO 4799 was developed by Technical Committee ISO/TC 48, Laboratory glassware and related apparatus, and was circulated to the member bodies in March 1976. it has been approved by the member bodies of the following countries : Hungary Poland Belgium India Canada Romania South Africa, Rep. of Chile Israel Italy Spain Egypt, Arab Rep. of Korea, Rep. of Turkey France Germany, F. R. Philippines U.S.S.R. The member bodies of the following countries expressed disapproval of the document on technical grounds : Australia Czechoslovakia Netherlands @ International Organization for Standardization, 1978 Printed in Switzeriand Copyright International Organization for Standardization Not for Resale ISO 4799-1978 (E) INTERNATIONAL STANDARD Laboratory glassware -- Condensers 1 SCOPE AND FIELDOF APPLICATION 5 MATERIAL Condensers shall be constructed of clear glass of suitable This International Standard specifies details for an inter- nationally acceptable series of glass condensers suitable chemical and thermal properties. for general use in laboratories. Internat stress and visible defects in the glass shall be reduced to a level sufficient to minimize the possibility of fracture due to thermal or mechanical shock. 2 REFERENCES isO 383, Laboratory glassware -- Interchangeable conical ground joints. 6 CONSTRUCTION 1so 641, Laboratory glassware -- Interchangeable spherical 6.1 The extremities may be plain (see 6.4) or fitted with ground joints. conical or spherical interchangeable ground glass joints (see 6.3). 3 DEFINITION 6.2 Water connections, for example olives, should prefer. For the purposes of this international Standard, the follow- ably face towards the same side of the condenser, except in ing definition applies : the case of type e) condensers, where this configuration may cause an increased risk of fracture. condenser : A piece of laboratory apparatus designed for the exchange of heat between two fluids. 6.3 Ground glass joints It is used for condensing vapours or for cooling or heating 6.3.1 Conical ground glass joints shall comply with the a liquid. requirements of Is 383, the sizes being chosen from the k6 series. 4 CLASSIFICATION AND TYPES 6.3.2 Spherical ground glass joints shall comply with the Five types of condenser, of three classes, according to requirements of Iso 641. design and the relative position of the cooling medium, are specified, with the nominal jacket lengths shown : 6.4 The wide end of plain-end condensers shall be fire- polished, and the stem shall be either ground or fire- water jacketed condensers : polished. a) Liebig-West condenser (see 8.1), 100 - 160 - 250 -- 400 --- 630 and 1000 mm; 6.5 The drip tip at the lo