Aqua ammonia corrodes copper (and copper-containing alloys such as brass), zinc, cadmium and silver. Ammonia is not, strictly speaking, a poison and repeated exposure to it produces no additive (chronic) effects on the human body. Ensure ammonia being introduced to the system is refrigerant grade. eyes, throat, and breathing passages. When the pressure is released, the liquid evaporates rapidly, generally forming an invisible vapor or gas. Stress corrosion cracking proceeds more rapidly at high temperatures. Sat. percent ammonia by weight. Sat. On the other hand, anhydrous ammonia is essentially pure (over 99 percent) ammonia. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) Gr. Ammonia chemically combines with water to form ammonium hydroxide. Physical properties of ammonia Ammonia is a colourless gas with a sharp, penetrating odour. Release of ammonia due to excess water within the system freezing, which causes broken pipes and equipment. Because water can absorb ammonia so readily, it is a factor that contributes to human toxicity. One 1. ammonia. 10 percent. they need to be using respiratory protection. Water cannot have a content above 33 parts per million (ppm) and oil cannot have a content above 2 ppm. Contact information is provided on the following page:  Contact Us - (opens in a new tab). Free Ammonia Tables Calculator. Any water source is acceptable; such as showers, hoses, or stock Physical Properties Aqua ammonia tissue. or modified significantly enough to require a The NH3 Calculator Web application calculates 30 thermodynamic and transport properties of ammonia. Ammonia Data Book 2-1 May 2008 Chapter Two Properties of Ammonia Physical Properties General Anhydrous ammonia exists as either a colorless gas, colorless liquid, or white solid, depending on its pressure and temperature. The spray is also capable of freezing clothing to and to facilities. Anhydrous ammonia is a clear liquid that boils at a temperature of -28�F. Ensure the effectiveness of air evacuation prior to charging the system. UGH UNIVERSITY STUDIED Science and technology Series, No. … Saturated Ammonia --Temperature Table Spec. Our goal is to improve the safety, efficiency, and productivity of industrial refrigeration systems and In addition to liquidization, super-cooled anhydrous ammonia spray causes a freeze dry effect like frost bite when it hits the skin. Water 4 F BTU per lb. Ammonia in water solution is called aqua ammonia or ammonium hydroxide. Sat. The second column is vapor pressure in k Pa . lbs./U.S. The value of each subscription you purchase (1 or more) can be applied as a discount towards a purchase of the full license of our related NH3 Tables desktop software (NH3Tables Excel Add-In). It is recommended that if an employee can smell it they ought to back off and determine if Establish and implement written procedures If the tank is 90 percent full at For example, if liquid anhydrous ammonia Histidine ammonia-lyase defects cause histidinemia High concentrations in the air can also dissolve in the moisture of the skin or perspiration and result in a corrosive action on the skin and mucous membranes. is in a partially filled, closed container it is heated from 0�F to 68�F, the volume of the liquid will increase by about Alkalis effect tissue differently than acids, which tend to burn and seal off a Ammonia or R717 is amongst the oldest of all the refrigerants and still used widely in the refrigeration applications. Preserving the purity of the ammonia is essential to ensure proper function of the refrigeration system. cubic foot of liquid at 60�F expands to, 850 If you have any questions, please don't hesitate to contact sales. Sat. TEMPERATURE AND PRESSURE CHART Ammonia, especially in the presence of moisture, reacts with and corrodes copper, zinc, and many alloys. This is why ammonia is used in refrigeration systems. The following user settings, from the last session, are automatically restored: For the best performance use the latest version of your favorite browser: Copyright © 2009 - 2020 MegaWatSoft Inc., all rights reserved. involved. ! fittings, and piping. Provide a separate oil pot for vessels that operate below atmospheric pressure. The rapid evaporation causes the temperature of the liquid to drop until it reaches the normal boiling point of -28�F, a similar effect occurs when water evaporates off the skin, thus cooling it. Liquid anhydrous ammonia weighs less than water. Save all subscription order IDs. off. The fire hazard from ammonia is increased by the presence of oil or other combustible materials. Under pressure ( psi ) to 110 psi in calculations solution containing 5 to 10 ammonia... 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