Code of Colorado Regulations
1200 - Department of Agriculture
1202 - Inspection and Consumer Services Division
8 CCR 1202-5 - STORAGE AND HANDLING OF ANHYDROUS AMMONIA
Section 3 - CONSTRUCTION OF ANHYDROUS AMMONIA SYSTEMS

3.1.1. Each container shall be constructed and tested in accordance with the Code and shall have a minimum design pressure of 250 psig.

3.1.2. Containers used with systems covered in Sections 7, 9, 10 and 11 shall be constructed and tested in accordance with the ASME Unfired Pressure Vessel Code except that construction under Table UW 12 at a basic joint efficiency of under 80% is not authorized.

3.1.3. Containers exceeding 36 inches in diameter or 250 gallons capacity shall be constructed to comply with one or more of the following additional requirements:

3.1.4. Welding to the shell, head, or any other part of the container subject to internal pressure shall be done in compliance with the Code under which the container was fabricated and shall be performed by a person or company that has a current certificate of authorization from the National Board of Boiler and Pressure Vessel Inspections. Other welding is permitted only on saddle plates, lugs, or brackets attached to the container by the container manufacturer.

3.1.5. All records of inspections and welding on the container shall:

3.1.6. All containers shall be inspected by a person having a current certificate of competency from the National Board of Boiler and Pressure Vessel Inspectors.

3.1.7. The provisions of 3.1.2 shall not be construed as prohibiting the continued use or reinstallation of containers constructed and maintained in accordance with the ASME Unfired Pressure Vessel Code.