O-A-445C
2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless a specific issue is identified, the issue in effect on the date of invitation for bids or request for proposal shall apply.
ASTM International (ASTM)
ASTM D 3951 - Standard Practice for Commercial Packaging (DoD adopted). ASTM D 4377 - Standard Test Method for Water in Crude Oils by
Potentiometric Karl Fischer Titration (DoD adopted).
(Private sector and civil agencies may purchase copies of these voluntary standards from
ASTM International, P.O. Box 700, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959. Electronic copies may be obtained from https://www.astm.org/.) Compressed Gas Association, Inc. (CGA)
CGA G-2 - Anhydrous Ammonia (DoD adopted).
CGA TB-17 - Test Methods for Evaluating Paints and Coatings on
Refillable Steel Compressed Gas Cylinders (DoD adopted).
(Private sector and civil agencies may purchase copies of these voluntary standards from the Compressed Gas Association, Inc., 4211 Walney Road, 5th Floor, Chantilly, VA 20151-2923. Electronic copies may be obtained from https://www.cganet.com/.)
3. REQUIREMENTS
3.1 Material. The ammonia shall conform to table I.
TABLE I. Properties of ammonia.
Properties |
Technical grade weight (percent) |
Purity (min.)1 |
99.98 |
Oil (max.) |
0.0005 |
Moisture (max.) |
0.02 |
1Purity is the weight percent of ammonia by difference, when the weight percent of the residual evaporated at not greater than 86 °F (30 °C) is adjusted for absorbed NH3 and subtracted from 100 percent.
3.1.1 Filtration. The ammonia shall be filtered by the use of a 10-micron nominal filter between the supplier's source and the container of delivery.
3.1.2 Contaminant testing. When the ammonia is produced with hydrogen from a source other than natural gas, it shall be tested for pyridine, naphthalene, and hydrogen sulfide. There shall be no evidence of the presence of the above compounds when tested in accordance with 4.4.6.1,
4.4.6.2, and 4.4.6.3.
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