Section 7-12-01-04 - General requirements1.Frequency of inspection. Existing anhydrous ammonia storage facilities must be inspected once every five years by the agriculture commissioner. New anhydrous ammonia storage facilities must be inspected by the agriculture commissioner prior to any license being issued, and at an interval of once every five years thereafter. 2.Minimum requirements for new storage containers other than refrigerated storage containers.a. American society of mechanical engineers constructed and so stamped;b. National board registered;c. Metal specified tensile strength not exceeding seventy thousand pounds per square inch [482636 kilopascals];d. Head and shell materials for storage containers made in accordance with fine grain practice;e. All welds postweld heat treated after construction, for all storage containers . An implement of husbandry does not require postweld heat treatment if the implement is fabricated with hot formed heads or with cold formed heads that have been stress relieved; andf. Storage containers exceeding six thousand water gallons [22712.4 liters] in capacity must be equipped with a manhole opening.3.Minimum requirements for secondhand and reinstalled storage containers other than refrigerated storage containers.a. American society of mechanical engineers constructed and so stamped;b. National board registered or the manufacturer's data report furnished to the chief boiler inspector;c. Metal specified tensile strength not exceeding seventy-five thousand pounds per square inch [517500 kilopascals];d. Heat treated heads or hot formed heads and this indicated on the manufacturer's data report, in lieu of the entire vessel welds being postweld heat treated; ande. All postconstruction repairs and alterations made only by a valid holder of an "R" certificate of authorization from the national board.4.Exception for secondhand and reinstalled storage containers. Metal specified tensile strength may exceed seventy-five thousand pounds per square inch [517500 kilopascals] for secondhand and reinstalled anhydrous ammonia storage containers when the container is relocated within North Dakota and the container has been wet-fluorescent magnetic particle tested by a qualified firm and any stress corrosion cracking found does not extend beyond the minimum required thickness for original maximum allowable working pressure (MAWP). The minimum required thickness must be determined by code calculation, using the original code of construction. If the stress cracking extends beyond the minimum required, thickness the container cannot be used for anhydrous ammonia service. In all cases, all stress corrosion cracking must be removed.5.Requirements for refrigerated storage containers. Refrigerated storage containers must be constructed in accordance with section 7 of the ANSI/CGA G-2.1 standard. All refrigerated ammonia piping used with refrigerated systems must conform to ASME B31.5, American national standard for refrigerated piping.6.Hydrostatic test procedures. Hydrostatic test procedures must comply with the specific requirements of the national board inspection code and be conducted in a manner approved by the agriculture commissioner. At least one calibrated gauge must be used on the container tested. All air must be vented prior to making the test.7.Wet-fluorescent magnetic particle test procedures. Wet-fluorescent magnetic particle test procedures must comply with SNT-TC-1A procedures and the specific requirements of ASME code, section VIII. The person conducting the test must be certified as a level II technician. This test may be witnessed by the agriculture commissioner, at the agriculture commissioner's discretion.8.Welded repairs or alterations, or both, to pressure containers. Welded repairs or alterations, or both, to pressure containers must only be made by a firm in possession of a valid "R" certificate of authorization from the national board of boiler and pressure vessel inspectors.9.Requirements for welded piping. Welders making welds to anhydrous ammonia system piping must be certified in accordance with ASME code, section IX, and must furnish a current QW-484 qualification form upon request. The welder must weld only within the range of the welder's qualifications. Defective weld must be rejected by the agriculture commissioner.10.Requirements for reinstalled containers and systems. When a permanent storage container is moved and reinstalled, all fittings and appurtenances must comply with all requirements for new installations.N.D. Admin Code 7-12-01-04
Effective July 1, 1996; amended effective April 1, 1998; April 1, 2013.Amended byAdministrative Rules Supplement 2020-377, July 2020, effective 7/1/2020.General Authority: NDCC 4.1-37-01
Law Implemented: NDCC 4.1-37-01