shall be kept free of debris, and grass and weeds shall be kept cut to a height not exceeding six inches. Pumps shall be designed for at least 250 p.s.i.g. F. except on containers provided with fixed level indicators, such as fixed length dip tubes, or containers that are filled with weight. Ammonia gas, nitrogen, methane, or other inert gases can be used to provide a pad. This paragraph applies to containers and pertinent equipment mounted on tank motor vehicles including semitrailers and full trailers used for the transportation of ammonia. Where containers are reinstalled above ground, safety devices or gaging devices shall comply with paragraph (b)(9) of this section and this paragraph respectively for aboveground containers. All containers with a capacity exceeding 250 gallons shall be equipped for spray loading or with an approved vapor return valve. Shutoff valves shall not be installed between the safety-relief valves and the container; except, that a shutoff valve may be used where the arrangement of this valve is such as always to afford full required capacity flow through the relief valves. "The rate of discharge may be interpolated for intermediate values of surface area. Pipe shall be Schedule 80. All container openings, except safety relief valves, liquid-level gaging devices, and pressure gages, shall be labeled to designate whether they communicate with liquid or vapor space. For containers with total outside surface area greater than 2,500 square feet, the required flow rate can be calculated using the formula: Flow Rate CFM Air=22.11 A(0)(82), where A=outside surface area of the container in square feet". Compressors used for transferring or refrigerating ammonia shall be recommended for ammonia service by the manufacturer. Openings from the container or through fittings attached directly on the container to which pressure gage connections are made need not be equipped with excess flow valves if such openings are not larger than No. Hose and hose connections located on the low-pressure side of flow control of pressure-reducing valves shall be designed for a bursting pressure of not less than 5 times the pressure setting of the safety relief devices protecting that portion of the system but not less than 125 p.s.i.g. The vent lines shall be installed to prevent accumulation of liquid in the lines. The rate of the discharge shall be in accordance with the provisions of Table H-36. On the discharge side of the pump, before the relief valve line, there shall be installed a pressure gage graduated from 0 to 400 p.s.i. Backflow check valves or properly sized excess flow valves shall be installed where necessary to provide such protection. An entrainment separator of suitable size and design pressure shall be installed in the compressor suction line of lubricated compression. (c) Each bulk storage tank shall be marked on at least two sides with the words “Anhydrous Ammonia - DANGEROUS OR CAUTION” in white letters not less than 6 inches high on a red background or the reverse. Anhydrous ammonia has several other applications, being used for a variety of purposes in laboratory testing. The control mechanism for such valves may be provided with a secondary control remote from the delivery connections and such control mechanism shall be provided with a fusible section (melting point 208 deg. Filling connections shall be provided with automatic back-pressure check valves, excess-flow valves, or quick-closing internal valves, to prevent back-flow in case the filling connection is broken. for plumbing multi-tank anhydrous ammonia systems have been developed by a coalition of state government, academia and industry representatives. An emergency alarm and shutoff shall be located in the condenser system to respond to excess discharge pressure caused by failure of the cooling medium. A spring-loaded, safety-relief valve capable of discharging to atmosphere the full flow of gas from the compressor at a pressure not exceeding 300 p.s.i.g. Use Non-Corrosive Storage Containers: Anhydrous ammonia is a very strong compound and has a capacity to corrode metals like zinc, copper, and alloys containing these metals. Containers with a design pressure of 15 p.s.i.g. For requirements covering farm vehicles, refer to paragraphs (g) and (h) of this section. 1.3.4 Depot A stationary anhydrous ammonia storage system, including the container or containers, container fittings and the ancillary equipment essential for … Safety-relief valves shall have direct communication with the vapor space of the container. The valve or valve installation shall provide weather protection. working pressure. F. and 130 deg. "Certified" means it has been tested and found by a nationally recognized testing laboratory to meet nationally recognized standards or to be safe for use in a specified manner, or is of a kind whose production is periodically inspected by a nationally recognized testing laboratory, and it bears a label, tag, or other record of certification. All containers shall be equipped with a fixed liquid-level gage. The container thus coated shall be so lowered into place as to prevent abrasion or other damage to the coating. All liquid and vapor connections to containers except filling pipes, safety relief connections, and liquid-level gaging and pressure gage connections provided with orifices not larger than No. Underground containers shall be set on a firm foundation (firm earth may be used) and surrounded with earth or sand well tamped in place. F. and 130 deg. Any pump, except a constant speed centrifugal pump, shall be equipped with a suitable pressure actuated bypass valve permitting flow from discharge to suction when the discharge pressure rises above a predetermined point. RAGAGEP does not recommend internal ammonia tank inspections since many ammonia vessel are designed without a man way and ammonia is not corrosive to carbon steel. All containers with a capacity exceeding 250 gallons shall be equipped with a pressure gage having a dial graduated from 0-400 p.s.i. However, while anhydrous ammonia inside a container is safe, outside of a container, as a colorless gas in its natural form, the chemical can be quite dangerous. A hydrostatic relief valve shall be installed between each pair of valves in the liquid ammonia piping or hose where liquid may be trapped so as to relieve into the atmosphere at a safe location. With marking indicating the maximum level to which the container may be filled with liquid anhydrous ammonia at temperatures between 20 deg. Anhydrous ammonia - Storage and handling: AS/NZS 2022:2003 AMDT 1: Anhydrous ammonia - Storage and handling: AS/NZS 2022-2003: Anhydrous ammonia - Storage and handling: AS/NZS 2022-2003 AMDT 1: Anhydrous ammonia - Storage and handling All piping, tubing, and fittings shall be designed for a pressure not less than the maximum pressure to which they may be subjected in service. IDA regulations require an emergency sign with letters of a minimum height of two inches including the name and phone number of the owner, manager or agent of the anhydrous ammonia storage location. Each vehicle transporting ammonia in bulk except farm applicator vehicles shall carry a container of at least 5 gallons of water and shall be equipped with a full face mask. The filling connection shall be fitted with a combination back-pressure check valve and an excess-flow valve; one double or two single back-pressure check valves: or a positive shutoff valve in conjunction with an internal back-pressure check valve or an internal excess-flow valve. Every container shall be provided with one or more safety-relief valves of the spring-loaded or equivalent type in accordance with paragraph (b)(9) of this section. Farm vehicles shall conform with State regulations. Where a fifth wheel is employed, it shall be ruggedly designed, securely fastened to both units, and equipped with a positive locking mechanism which will prevent separation of the two units except by manual release. Pressure gages of bourdon-tube type shall be installed on the suction and discharge of the compressor before the shutoff valves. Some operators have only one single ammonia tank without spare capacity. With the design pressure in pounds per square inch. The maximum allowable water level to which the container may be filled for test purposes. 2. The weak roof-to-shell seam is not to be considered as providing any of the capacity required in (a) of this subdivision. In the event of exposure to the eyes or skin, ANSI/CGA G-2.1-2014 states that the exposed area should be “flushed with clean water for at least 15 minutes or more (preferably 20-30 minutes but not less than 15 minutes), with the eyes receiving first attention.”. All connections to underground containers shall be located within a dome, housing, or manhole and with access thereto by means of a substantial cover. If a metal dome is used, the relief valve shall be properly vented through the dome. Tubing made of brass, copper, or other material subject to attack by ammonia shall not be used. Handling Anhydrous Ammonia Read and follow the instructions that come with your equipment. Tanks valves should be replaced or tested every 5 years and tank owners should keep records to support this data. This website uses cookies, as described in the ANSI Privacy Policy. Each container or system covered in paragraphs (c), (f), (g), and (h) of this section shall be marked as specified in the following: With a marking identifying compliance with the rules of the Code under which the container is constructed. Terminal storage tanks refrigerate ammonia to minus 28 degrees Fahrenheit. Every container shall be supported to prevent the concentration of excessive loads on the supporting portion of the shell. The flow capacity of the relief valve shall not be restricted by any connection to it on either the upstream or downstream side. I would like to see more precautions one should take while dealing with chemicals. Example: "NH(3) 250-4050 Air" indicates that the valve is suitable for use on an anhydrous ammonia container, is set to start-to-discharge at a pressure of 250 p.s.i.g., and that its rate of discharge at full open position (subdivisions (ii) and (iii) of this subparagraph) is 4,050 cubic feet per minute of air. The shell or head thickness of any container shall not be less than three-sixteenths inch. STORAGE TANKS Markings and placarding must be COMPLETE, UNFADED, AND FULLY VISIBLE. Each container shall have a fixed liquid-level gage. However, water should never be used on liquid ammonia spills, as it can cause a chemical reaction. The Compressed Gas Association, Inc., ANSI/CGA G-2.1-2014 – Requirements for the Storage and Handling of Anhydrous Ammonia (Chantilly: The Compressed Gas Association, Inc., 2014), 3. Storage and handling of anhydrous ammonia. Provision shall be made to secure both ends of the hose while in transit. Containers which may contain liquid ammonia before being installed underground and before being completely covered with earth are to be considered aboveground containers when determining the rate of discharge requirements of the safety-relief valves. Fixed tube liquid-level gages shall be designed and installed to indicate that level at which the container is filled to 85 percent of its water capacity in gallons. 54 drill-size orifice shall have shutoff valves located as close to the container as practicable. These containers, including the portable ones used for transport, should be designed with carbon steel with tensile strength suitable for maintaining the pressurized gas. ANSI/CGA G-2.1-2014 describes the effects of ammonia on the human body from specific concentrations in the following table: To combat problems related to direct contact with anhydrous ammonia, it is recommended that employers provide ammonia installations with clean, running water for emergency use, or emergency eyewash units. Marking the container. Stationary Tank Requirements Tank Design ASME Boiler & Pressure Vessel Code Sec VII, Div 1, 250 psi minimum Tank Sizes 2,000 – 120,000 gallons Location, Design, Depart of Labor Requirement: Construction & Operation Conform to 29 F1910.111, American National Safety Institute, ANSI K61.1 Introduction . Should ground conditions make compliance with these requirements impracticable, installation shall be made otherwise to prevent physical damage. All connections to containers, except filling connections, safety relief devices, and liquid-level and pressure gage connections, shall be provided with suitable automatic excess flow valves, or in lieu thereof, may be fitted with quick-closing internal valves, which shall remain closed except during delivery operations. Pumps used for transferring ammonia shall be those manufactured for that purpose. With a notation whether the system is designed for underground or aboveground installation or both. The general housekeeping and maintenance of buildings, tanks, etc. Safety relief valves shall be set to start-to-discharge at a pressure not in excess of the design pressure of the container and shall have a total relieving capacity sufficient to prevent a maximum pressure in the container of more than 120 percent of the design pressure. F. With the total outside surface area of the container in square feet. The design temperature shall be the minimum temperature to which the container will be refrigerated. Compressors shall have pressure gages at suction and discharge graduated to at least one and one-half times the maximum pressure that can be developed. Your email address will not be published. Full trailers shall be so designed that the towed vehicle will follow substantially in the path of the towing vehicle and will not whip or swerve dangerously from side to side. (A 15% vapor space must always be maintained when filling, to allow for expansion). Links to relevant rules, guidance, and forms. storage tank, transport tank, portable tank, applicator tank, or other pressure container designed, constructed and fitted in accordance with these regulations shall be used for the storage, delivery or application of anhydrous ammonia. With the maximum level to which the container may be filled with liquid anhydrous ammonia. Markings shall be in increments of not more than 20 deg. "Labeled" means there is attached to it a label, symbol, or other identifying mark of a nationally recognized testing laboratory which, makes periodic inspections of the production of such equipment, and whose labeling indicates compliance with nationally recognized standards or tests to determine safe use in a specified manner. Resources For specific requirements for towing anhydrous ammonia nurse tanks, contact the North Dakota Department of Transportation at 701-328-2500. The total relieving capacity shall be the larger of: Possible refrigeration system upset such as (1) cooling water failure, (2) power failure, (3) instrument air or instrument failure, (4) mechanical failure of any equipment, (5) excessive pumping rates. F.) which will permit the internal valve to close automatically in case of fire. Containers shall be located outside of buildings or in buildings or sections thereof especially provided for this purpose. Paragraph (b) of this section applies to this paragraph unless otherwise noted. regional ammonia safety standards are reviewed and compared including North America, the European Union, Asia, India, and Australia. All connections to containers except safety relief devices, gaging devices, or those fitted with No. "Design pressure" is identical to the term "Maximum Allowable Working Pressure" used in the Code. On underground installations where there is a probability of the manhole or housing becoming flooded, the discharge from vent lines shall be located above the high water level. Each container except those filled by weight shall be equipped with an approved liquid-level gaging device. All vehicles shall carry a can containing 5 gallons or more of water. Each filling connection shall be provided with combination back-pressure check valve and excess-flow valve; one double or two single back-pressure check valves; or a positive shutoff valve in conjunction with either an internal back-pressure check valve or an internal excess flow valve. Any portion of liquid ammonia piping which at any time may be closed at both ends shall be provided with a hydrostatic relief valve. Occupational Safety and Health Administration, Severe Storm and Flood Recovery Assistance. All containers shall be equipped for spray loading (filling in the vapor space) or with an approved vapor return valve of adequate capacity. Gaging devices shall have a design pressure equal to or greater than the design pressure of the container on which they are installed. The document shall be signed by a registered professional engineer or other person having special training or experience sufficient to permit him to form an opinion as to safety of the unit involved. Adequate protection against flotation or other water damage shall be provided wherever high flood water might occur. This document is available on the ANSI Webstore. Container safety-relief valves shall be set to start-to-discharge as follows, with relation to the design pressure of the container: Each container safety-relief valve used with systems covered by paragraphs (c), (f), (g), and (h) of this section shall be plainly and permanently marked with the symbol "NH(3)" or "AA"; with the pressure in pounds-per-square-inch gage at which the valve is set to start-to-discharge; with the actual rate of discharge of the valve at its full open position in cubic feet per minute of air at 60 deg. All piping, tubing, and fittings shall be securely mounted and protected against damage. The document shall set forth the test bases, test data and results, and also the qualifications of the certifying person. Creating opportunity through more effective, more efficient, and customer focused State Government. ººº z may be stenciled if desired. Hose used in ammonia service shall conform to the joint Agricultural Ammonia Institute - Rubber Manufacturers Association Specifications for Anhydrous Ammonia Hose. Guidelines: 1. Where the filling and discharge connect to a common opening in the container shell and that opening is fitted with a quick-closing internal valve as specified in paragraph (f)(3)(ii) of this section, the automatic valve shall not be required. Cast iron fittings shall not be used but this shall not prohibit the use of fittings made specifically for ammonia service of malleable, nodular, or high strength gray iron meeting American Society for Testing and Materials (ASTM) A47-68, ASTM 395-68, or ASTM A126-66 Class B or C, all of which re incorporated by reference as specified in § 1910.6. Containers once installed under ground shall not later be reinstalled above ground or under ground, unless they successfully withstand hydrostatic pressure retests at the pressure specified for the original hydrostatic test as required by the code under which constructed and show no evidence of serious corrosion. Excess flow and back pressure check valves where required by the standards in this section shall be located inside of the container or at a point outside as close as practicable to where the line enters the container. Electrical equipment and wiring for use in ammonia installations shall be general purpose or weather resistant as appropriate. Valves, regulating, gaging, and other appurtenances shall be protected against tampering and physical damage. how to mark your ammonia tank - 2011 edition office of indiana state chemist page 2 marking of stationary equipment - ammonia storage tanks : required types of markings : ' caution ammonia' or ' anhydrous ammonia' : z must be in lettering at least 6" tall. 54 drill size. Similar plumbing on both transport and storage tanks made the transfer possible. The Fire Marshal’s office was organized on April 3, 1909 by a legislative act known as the Fire Commission Law. Anhydrous ammonia, or ammonia that lacks water, is an incredibly important chemical for agriculture. This distance shall be measured from the gauge side of the nearest rail to the nearest point on the tank shell. More than one storage container may be handled by the same refrigeration system. The total refrigeration load shall be computed as the sum of the following: Load imposed by heat flow into the container caused by the temperature differential between design ambient temperature and storage temperature. Consideration shall be given to the physiological effects of ammonia as well as to adjacent fire hazards in selecting the location for a storage container. All appurtenances shall be designed for not less than the maximum working pressure of that portion of the system on which they are installed. Occupational Safety & Health Administration. shall be constructed in accordance with paragraph (b)(2) of this section, and the materials shall be selected from those listed in API Standard 620, Recommended Rules for Design and Construction of Large, Welded, Low-Pressure Storage Tanks, Fourth Edition, 1970, Tables 2.02, R2.2, R2.2(A), R2.2.1, or R2.3, which are incorporated by reference as specified in § 1910.6. Anhydrous ammonia (ammonia)1 is an industrial and commercial compound with ever increasing popularity in a multitude of applications. There shall appear on each side and on the rear end of the container in letters at least 4 inches high, the words, "Caution - Ammonia" or the container shall be marked in accordance with DOT regulations. If the content of a container is to be determined by liquid-level measurement, the container shall have a thermometer well so that the internal liquid temperature can be easily determined. Anhydrous ammonia storage tanks are available in a variety of sizes depending on individual requirements. The sign must be located at the entrance to the site property or apart from the storage tanks. Every full trailer shall be equipped with self-energizing brakes. Containers installed above ground, except as provided in paragraph (c)(5)(v) of this section shall be provided with substantial concrete or masonry supports, or structural steel supports on firm concrete or masonry foundations. To prevent vaporization, the compressed gas is injected into the soil. "Farm vehicle" (implement of husbandry) - A vehicle for use on a farm on which is mounted a container of not over 1,200 gallons water capacity. The minimum design pressure for containers shall be 250 p.s.i.g. F. or gallons, U.S. Standard. Other welding is permitted only on saddle plates, lugs, or brackets attached to the container by the container manufacturer. Storing large volumes of chemicals such as ammonia presents a number of challenges, including safety, environmental, and health concerns. The storage pressure at -28┬ F is less than 1 psi. All excess flow valves shall be plainly and permanently marked with the name or trademark of the manufacturer, the catalog number, and the rated capacity. Hose assemblies, when made up, shall be capable of withstanding a test pressure of 500 p.s.i.g. No excess flow valve is required in the liquid withdrawal line provided the controlling orifice between the contents of the container and the outlet of the shutoff valve does not exceed seven-sixteenths inch in diameter. Brakes shall be set and wheels blocked on all cars being unloaded. All vapor and liquid connections except safety-relief valves and those specifically exempted by paragraph (b)(6)(v) of this section shall be equipped with approved excess-flow valves or may be fitted with quick-closing internal valves which, except during operating periods, shall remain closed. In the latter case installation shall be made in such manner that any undue strain beyond the excess flow or back pressure check valve will not cause breakage between the container and the valve. These requirements exist to protect anhydrous ammonia users and to ensure that nurse tanks are safe to transport on North Dakota roadways. If you use, handle, store, distribute, or transport anhydrous ammonia in quantities of 10,000 pounds or more, follow the requirements found in another chapter, Process Safety Management of Highly Hazardous Chemicals, Chapter 296-67 WAC. Containers installed under ground shall be so placed that the top of the container is below the frost line and in no case less than 2 feet below the surface of the ground. (This requirement does not apply to farm vehicles used for the application of ammonia as covered in paragraph (h) of this section.). If desired, vent pipes from two or more safety-relief devices located on the same unit, or similar lines from two or more different units may be run into a common discharge header, provided the capacity of such header is at least equal to the sum of the capacities of the individual discharge lines. 54 drill-size opening need not be equipped with excess flow valves. The Compressed Gas Association, Inc.,Â, Storage and Handling of Anhydrous Ammonia. Where larger containers are used, they shall comply with paragraph (g) of this section. Relief valves for refrigerated storage containers shall be self-contained spring-loaded, weight-loaded, or self-contained pilot-operated type. 1. An emergency source of power of sufficient capacity to handle the loads listed in paragraphs (d)(8)(i) (a) and (b) of this section shall be provided unless facilities are available to safely dispose of vented vapors while the refrigeration system is not operating. Plant piping shall contain shutoff valves located as close as practical to pump connections. With the name and address of the supplier of the system or the trade name of the system and with the date of fabrication. Your email address will not be published. DOT specifications - Regulations of the Department of Transportation published in 49 CFR Chapter I. , contact the North Dakota roadways never be used designed to anhydrous ammonia storage tank requirements type... Container was designed used as standby equipment for holding compressors have suitable rain caps that will allow free of. Valves, regulating, gaging, and fittings shall be capable of withstanding a test of... Fixed length dip tubes, or other material subject to attack by ammonia shall be substantially level to height! Means shall be capable of withstanding a test pressure of that portion of the sun,! `` Accept all cookies direct rays of the supplier of the container upward and unobstructed the... 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