SU0004714 - Laserfiche WebLink

Home Browse Search

AMERICAN NATIONAL STANDARD K61.1-1981 CUSTOMARY UNITS AND SI UNITS Minimum Distances(in feet or meters)from Container to: Nominal Capacity.of - .Line of Adjoining Property Place of Container which may be built upon, Public Institution (Gallons or Cubic Meters) Highways&Mainline of Railroad Assembly Occupancy Over 500 to 2,000 gals. 25 ft. 150 ft. 250 ft. Over 2,000 to 30,000 gals. 50 ft. 300 ft. 500 ft. Over 30,000 to 100,000 gals. 50 ft. 450 ft. 750 ft. Over 100,000 gals. 50 ft. 600 ft. 1,000 ft. Over 1.89 to 7.57 m3 7.6 in 45.7 in 76.2 in Over 7.57 to 113.56 m' 15.2 in 91.4 m 152.4 m Over 113.56 to 378.5M3 15.2 in 137.2 in 228.6 in Over 378.5 m3 15.2 m 182.9 in 304.8 in 2.5.5 Storage areas shall be kept free of readily be located inside of the container or at a point ignitable materials such as waste, weeds and outside as close as practicable to where the line long dry grass. enters the container. In the latter case, installa- tion shall be made in such manner that any undue 2.6 Container Appurtenances stress beyond the excess flow or back pressure check valve will not cause breakage between the 2.6.1 All appurtenances shall be designed for container and the valve. not less than the maximum working pressure of that portion of the system on which they are 2.6.7 Excess flow valves shall be designed installed. All appurtenances shall be fabricated with a by-pass, not to exceed a No. 60 drill size from materials proved suitable for anhydrous opening to alio v equalization of pressures. ammonia service. 2.6.8 Shut-off valves provided with an excess 2.6.2 All connections to containers except for flow valve shall be designed for proper installa- those safety relief devices, gaging devices, or tion in a container connection so that the excess those fitted with a No.54 drill sizeorifice or those flow valve will close should the shut-off valve plugged shall have shut-off valves located as close break. to the container as practicable. 2.6.9 All excess flow valves shall be plainly 2.6.3 Excess flow valves where required by and permanently marked with the name or these standards shall close automatically at the. trade-mark of the manufacturer, the catalog rated flows of vapor or liquid as specified by the number, and the rated capacity. manufacturer. The connections and line includ- 2,6.10 The filling connection shall consist of a ing valves and fittings being protected by an positive shut-off valve in conjunction with either excess flow valve shall have a greater capacity an interpal back pressure check valve or an than the rated flow of the excess flow valve. internal excess flow valve. 2.6.4 Liquid level gaging devices that require 2,6.11 Unless equipped with approved safety bleeding of the product to the atmosphere and catch, quick opening(%turn)valves shall not be which are so constructed that outward flow will used on the end of a filler hose line. not exceed that passed by a No. 54 drill size opening need not be equipped with excess flow 2.7 Piping,Tubing and Fittings valves. 2.6.5 Openings from container or through 2.7.1 All piping, tubing and fittings shall be fittings attached directly on container to which made of material suitable for anhydrous ammonia pressure gage connections are made need not be service. equipped with excess flow valves if such openings 2,7,2 All piping, tubing and fittings shall be are not larger than No. 54 drill size. designed for a pressure not less than the 2.6.6 Excess flow and back pressure check maximum pressure to which they may be sub- valves where required by these standards shall jected in service. 11