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.r AMERICAN NATIONAL STANDARD K61.1-1981 1.2.7 Ammonia should be handled only by 1965, 1968, 1971, 1974, 1977 and 1980 Editions, properly trained personnel. In no case shall the joint code of the American Petroleum Insti- ammonia be used in conjunction with chemicals tute and the American Society of Mechanical unless the possible reactions have first been Engineers Addenda to or later editions of the adequately investigated. Under some circum- same, as adopted. stances ammonia and ammonium compounds 1.3.6 "Container" means all tanks, except can form explosive products with other chemi- cylinders as defined in 1.3.4, used for trans or- cals. For additional information refer to NFPA p 491M "Manual on Hazardous Chemical Reac- tions" and CG-388, the "Chemical Data Guide 1.3.7 "Design Pressure" is identical to the for Bulk Shipment by Water"(1969 Edition). term "Maximum Allowable Working Pressure" 1.2.8 Ammonia gas can irritate the eyes,skin used in the Code. and mucous membrane. The Threshold Limit 1.3.8 "Implement of Husbandry" is a farm Value(TLV)for an 8 hour exposure is 50 ppm on a wagon type tank vehicle of not over 3000 gallons Time Weighted Average (TWA). At 50 ppm the (11.356 ma)capacity used as a field storage"nurse pungent odor of ammonia is detectable by most tank"supplying the fertilizer to afield applicator people and serves as its own warning.No person and moved on highways only for bringing the will voluntarily remain in concentrations which fertilizer from a local source of supplyto farms or are hazardous or injurious to health. Inhalation fields or from one farm or field to another. of concentrations above 2500 ppm are considered immediately dangerous to life and health. At 1.3.9 "Filling Density" means the per cent 5000 ppm, it is rapidly fatal.Since ammonia gas ratio of the weight of the gas in a container to the is lighter than air, adequate ventilation is the weight of water at 60 F(15.6 C)thatthe container best means of preventing any accumulation. will hold.One lb.H2O=27.737 cu.in.at 60 F(15.6 per and copper base alloys such C). For determining the water capacity of the 1.2.9 Zinc,copper p tank in pounds,the weight of aggallon(231 cubic as brass are subject to rapid deterioration by inches) of water at 60 F (15.6 C) in air shall be ammonia.The common metals are not attacked 8.32828 pounds (3.7776 kg). by dry ammonia. 1.3.10 "Gas"refers to anhydrous ammonia in 1.3 Definitions either the gaseous or liquefied state. For the purposes of this standard the items 1.3.11 "Gas Mask" refers to an air ppurifying listed below shall be const ntedtohave the meanirlgs respiratory device approved by NIOSH,MSHA. indicated MESA or Bureau of Mines for use in ammonia contaminated atmospheres and complying with 1.3.1 "Approved" in this standard means: 29 CFR 1910.134. (a) Listed by a recognized testing laboratory' 1.3.12 "DOT Regulations"refers to Hazardous (b) Recommended by the manufacturer as Materials Regulations of the Department of suitable for use with anhydrous ammonia and so Transportation (Title 49—Transportation, Code marked,or of Federal Regulations, Parts 100 to 199), (c) Accepted by the authority having juris- including specifications for Shipping Containers. diction. 1.3.2 "Appurtenance"refers to all devices such 1.3.13 "System" as used in these standards as safety relief devices, liquid level gaging refers to an assembly of equipment consisting devices,valves,pressure gages,fittings,metering essentially of the container or containers, hoses, or dispensing devices. appurtenances, pumps, compressors, and inter- 1.3.3 "Capacity" refers to the total volume of connecting piping. the container measured in U.S. Gallons, unless 1.3.14 The abbreviations "psig" and "psia" otherwise specified. refer to pounds per square inch gage and pounds 1.3.9 "Cylinder"means acontainer of1000lbs. per square inch absolute, respectively. (453.6 kg) water capacity or less constructed in 1.3.15 The terms"transfer","fill"and"charge" accordance with United States Department of may be used interchangeably and mean move- Transportation Specifications for cylinders. mentof aquantityof ammoniafrom onecontainer 1.3.5 "Code" means The American Society of to another container or cylinder, as contrasted to Mechanical Engineers Boiler and Pressure Ves- feeding ammonia to a use or application device. sel Code, Section VIII, Division 1, Rules for 1.3.16 'Trailer' as used in these standards Construction of Pressure Vessels and Section IX, refers to every vehicle designed for carrying Welding Qualifications; 1952, 1956, 1959, 1962, persons or property and for being drawn by a •See Appendix C for availability. motor vehicle and so constructed that no part of 8