3137 Tso NTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ·MEKIYHAPOIHAA OPTAHW3ALIM HIO CTAHIAPTH3AHIHH.ORGANISATION INTERNATIONALE DE NORMALISATION Anhydrous hydrogen fluoride for industrial use - Sampling Fluorure d'hydrogene anhydre a usage industriel - Echantillonnage First edition -- 1974-12-15 AvsI Internat Doc Sect DEC181974 UDC 661.487 : 543.05 : 620.113 Ref. No. ISO 3137-1974 (E) Descriptors:hydrogenfluoride,sampling,chemicalanalysis Price based on 6 pages Copyright International Organization for Standardization tted without license from IHS Notfor Resale FOREWORD ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing Internationat 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 SO 3137 was drawn up by Technical Committee ISO/TC 47, Chemistry, and circulated to the Member Bodies in June 1973. It has been approved by the Member Bodies of the following countries : Austria India South Africa, Rep. of Belgium Israel Spain Bulgaria Italy Switzerland Czechoslovakia Netherlands Thaitand Egypt, Arab Rep. of New Zealand Turkey Poland France United Kingdom Germany Portugat U.S.S.R. Hungary Romania This International Standard has also been approved by the Internationai Union of Pure and Applied Chemistry (IUPAC). No Member Body expressed disapproval of the document. @ International Organization for Standardization, 1974 Printed in Switzerland Copyright International Organization for Standardization Not for Resale ISO 3137-1974 (E) INTERNATIONAL STANDARD Anhydrous hydrogen fluoride for industrial use -- Sampling WARNING --. Anhydrous hydrogen fluoride is a highly corrosive liquid which boils at 19,5 °c. It attacks glass, has a great affinity for water and its vapour is irritant and toxic. Its action on the skin and eyes is strongly corrosive, producing severe and painful burns which may not be immediately evident and which respond slowly to treatment. Samples should be handled only inside a well-ventilated fume cupboard. Rubber gloves, boots and gown of a suitable size to give adequate protection to the individual, and full head and face protection must be worn when handling the material. In the event of contact or suspected contact, flood with water and seek immediate medical attention. The manufacturers' literature should be consulted for further information. SECTION ONE -- LABORATORY SAMPLE 4.3 Stainless steel valve, C, fitting to the other screw 1 SCOPE thread of the transverse passage of the cylinder. Section one of this International Standard specifies a for taking laboratory samples of anhydrous method 4.4 Stainless steel tube, D, connecting the valve to the hydrogen fluoride, intended for the determination of the extraction system. water content and the preparation of the test sample for other determinations. 4.5 Screw caps, for closing the ends of the transverse passage. 2 FIELD OF APPLICATION 4.6 Vacuum pump, capable of producing rapidly This method is applicable to the sampling of anhydrous pressure of about O,6 kPa inside the cylinder. hydrogen fluoride from road and rail tanks, drums and cylinders. 5 PROCEDURE 3 PRINCIPLE Allowing the liquid from the bulk container to flow into a 5.1 Preparation of sample cytinder cooled evacuated stainiess steel cylinder or cylinders of not 5.1.1 Cleaning and drying less than 1 kg total capacity. Close one end of the transverse passage F with its screw cap and connect the other end to the ex