4.12.704 REQUIREMENTS OF CONSTRUCTION AND ORIGINAL TEST OF CONTAINERS, OTHER THAN REFRIGERATED STORAGE TANKS
(1) Containers used with systems covered in ARM 4.12.719 shall be constructed, installed, and tested as follows:
(a) the Unfired Pressure Vessel Code of ASME, except that construction under Paragraph UW 9 at a basic joint efficiency of under eighty percent is not authorized, and compliance with Paragraphs UG 132 and UG 133 shall not be required; or
(b) the 1951 edition of the Joint Code of the American Petroleum Institute and the American Society of Mechanical Engineers (API-ASME) , except that a basic joint efficiency of under eighty percent is not authorized, and compliance with Paragraph W 601 through W 609 and ASME's Table A shall not be required.
(2) Containers exceeding 36 inches in diameter or 250 gallon capacity shall be constructed to comply with one or more of the following requirements in addition to ARM 4.12.704(1) :
(a) containers shall be stress-relieved after fabrication in accordance with the Code; or
(b) cold formed heads when used shall be stress-relieved; or
(c) hot formed heads shall be used.
(3) Non-Code welding shall be made only on saddles or brackets originally welded to the container by the manufacturer. Non-Code welding directly to the container or any part subject to pressure is not authorized.
(4) All containers, except refrigerated storage tanks, with a design pressure of less than 15 psig shall be inspected by a person having a current certificate of competency from the National Board of Boiler and Pressure Vessel Inspectors.
(5) The provisions of ARM 4.12.704 (1) shall not be construed as prohibiting the continued use or re-installation of containers constructed and maintained prior to the effective date of these rules.