Our production +7 (473) 236-76-94 394052, Voronezh st., Ostrogozhskaya 109 V krioservis@mail.ru Oxygen OXYGEN LIQUID TECHNICAL AND MEDICAL GOST 6331-68 This standard applies to liquid industrial and medical oxygen obtained from atmospheric air by deep cooling. Liquid technical oxygen is used for various technical purposes. Liquid medical oxygen is used for breathing and medicinal purposes after gasification. Liquid oxygen is a bluish, odorless liquid with a boiling point of minus 182.97 ° C at normal pressure (760 ml rg. Art.). Liquid oxygen causes frostbite if it comes into contact with the skin. Formula: O2 Molecular weight (according to international atomic weights of 1961) - 32.006. I. TECHNICAL REQUIREMENTS 1.1. Depending on the content of oxygen and its impurities, technical liquid oxygen should be produced in three grades, medical liquid oxygen - in one grade. 1.2. In terms of physical and chemical indicators, technical and medical liquid oxygen must comply with the standards specified in table. one. The name of indicators Standards for varieties Technical oxygen Medical oxygen higher one 2 1. The oxygen content in vol. not less 99.7 99.5 99.2 99.2 2. A container of acetylene in 1 liter of liquid oxygen in ml at 20 * 0 and / 60 .im Hg. Art., as more Lack of 0.04 Lack of 3. The content of mlela in 1 liter of liquid oxygen and mg, no more Lack of 0.01 Lack of 4. Content of carbon dioxide in 1 liter of liquid oxygen in ml at 20X and 760 mm Hg. no „no more 3 3 Not standardized Pass the test according to clause 2.11 5. Carbon monoxide content Not standardized Pass the test on and. 2.12 6 . Content of gaseous acids and bases Not standardized Withstands test no. 2.13 7. Content of ozone and other oxidizing gases Not standardized Withstands the test of clause 2.14 8. Content of moisture and mechanical impurities Lack of Not standardized Lack of 9. Smell Not standardized Lack of 1.3. The finished product must be accepted by the technical control of the manufacturer. The manufacturer must ensure that all technical and medical liquid oxygen supplied meets the requirements of this standard. Medical and technical oxygen licenses. Copyright © "Krioservice" 2008 All rights reserved