University:
York University
Course:
SC/CHEM 2011 | Introduction to Thermodynamics
Academic year:

2024
Views:

314

Pages:

1
Author:

sonalhava9qv

Gases CGA Selection Chart PURE GASES CGA SELECTION CHART FOR FITTINGS CGA Fittings Required Pure Gases 510/300 Acetylene 590/346/347/702 Air 240/660/705 Ammonia 580/680/677 Argon 350 Arsine* 320 Carbon Dioxide 350 Carbon Monoxide 660 Chlorine 510 Cyclopropane 350 Deuterium 350 Ethane 350 Ethylene 510 Ethylene Oxide 580/680/677 Helium MIXED GASES CGA SELECTION CHART FOR FITTINGS CGA Fittings Required Mixed Gases Minor Component in Major Component 240/660/705 Ammonia Nitrogen 350 Butane Nitrogen 296 Carbon Dioxide Oxygen 580 Carbon Dioxide Helium or Nitrogen 580 Helium 590 Carbon Dioxide and/or Nitrogen Carbon Monoxide 330 Chlorine Nitrogen 350 Diborane 580 Freon-12 Argon, Helium, Hydrogen, Nitrogen Nitrogen 296 Helium Oxygen 350 Hexane Nitrogen Isobutane Nitrogen Argon Air 350/695/703 Hydrogen 350 330 Hydrogen Chloride 580 Krypton 330 Hydrogen Sulfide 590 Methane Air 580 Krypton 580 Moisture Argon, Helium or Nitrogen 350/695/703 Methane 660 Nitric Oxide Nitrogen 510 Methyl Chloride 580/680/677 Neon 660 Nitrogen Dioxide Air or Nitrogen 590 Nitrous Oxide Nitrogen 580/680/677 Nitrogen 326 Nitrous Oxide 590 Oxygen Nitrogen or Helium 540/577/701 Oxygen* 350 Propane Nitrogen or Helium 350 Phosphine 590 Propane Air 510 Propane 660 Sulfur Dioxide Air or Nitrogen 350 Silane* 668/660 Sulfur Dioxide 590 Sulfur Hexaflouride Argon, Helium or Nitrogen 590 Sulfur Hexaflouride 350 Sulfur Hexaflouride Hydrogen 580/680/677 Xenon It is recommended that the user thoroughly familiarize himself with the specific properties of these gases. The Compressed Gas Association (CGA) has selected and standardized the valve outlet to be used on each gas cylinder. These standards, contained in the document “CGA STANDARD V-1, Compressed Gas Cylinder Valve Outlet Connections” , have been adopted to prevent the inadvertent mixing of gases which could be reactive and to avoid other possible misuse hazards. The above chart may be used for guide purposes only. Consult your gas supplier to determine the actual CGA connection required when ordering a regulator. Since the combined characteristics of a mixture of gases often differ from the properties of the separate components, different CGA connections are often required. The CGA has selected and standardized the valve outlets to be used with mixed gases. These standards are described in CGA publication V-7 - “Standard Method for Determining Cylinder Valve Outlet Connections for Industrial Gas Mixtures”. Mixtures which use the same CGA connection as if the minor component were in its pure gas form have not been included for the sake of brevity. The proper fitting for these mixtures can be determined by looking up the minor component on the chart for pure gases. 5