O-A-445C
c. For oil determination draw a 1000 ml sample into a round bottom calibrated flask. Immediately stopper the flask with a vented stopper and allow to evaporate at room temperature. Read the pressure or temperature of the storage container to determine the evaporation factor from figure 1. The evaporation factor F is a correction for the evaporative cooling of liquid ammonia from the temperature corresponding to the pressure in the storage vessel to the boiling point at atmospheric pressure -27.94 °F (-33.3 °C).
TEMPERATURE °C
1.0
0.98
0.96
0.94
0.92
0.90
0.88
0.86
0.84
0.82
0.80
0.78
0.76
0.74
0.72
0.70
0 25 50 75 100 125 150 175 200
PRESSURE IN CONTAINER - POUNDS PER SQUARE INCH FIGURE 1. Evaporation factor.
4.4.2. Sample preparation. Place the tubes and the round bottom flasks in a circulating water bath until the ammonia evaporation is complete. The temperature of the bath shall not exceed
86 °F (30 °C). The remaining residue is a mixture of water, oil, nonvolatile impurities, and ammonia.
4.4.3 Moisture determination. The ammonia shall be tested for moisture by using the routine analysis method specified in 4.4.3.1. In case of dispute, the referee method specified in 4.4.4 shall be used as the determining criteria.
7
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business