Ariz. Admin. Code § R20-5-413 - Safety and Safety Relief Valves

A. A valve shall not be placed between a Safety Valve, Relief Valve, or a Safety Relief Valve and the Boiler, Lined Hot Water Heater, or Pressure Vessel, or between a Safety Valve, Relief Valve, or a Safety Relief Valve and the discharge pipe attached to the Boiler, Lined Hot Water Heater, or Pressure Vessel.

B. When a Power Boiler is supplied with feed-water directly from a water main without the use of a feeding apparatus, Safety Valves shall not be set at a pressure greater than 94% of the lowest pressure obtained in the water main feeding the Boiler;

C. Safety Valves, Safety Relief Valves, and Relief Valves shall conform to the requirements of the 2019 ASME Boiler and Pressure Vessel Code, Section I, IV or VIII, July, incorporated by reference as applicable. This incorporation does not include any later amendments or editions of the incorporated material. A copy of this referenced material is available for review at the Industrial Commission of Arizona, 800 W. Washington Street, Phoenix, AZ and may be obtained from ASME, Three Park Avenue, New York, NY 10016-5990 or at http://www.asme.org/.

D. The resetting, repairing, and restamping of Safety Valves, Relief Valves, and Safety Relief Valves shall be done by a qualified valve repair organization holding a valid "VR" Certificate of Authorization issued by the National Board of Boiler and Pressure Vessel Inspectors. ASME valve manufacturers holding a valid "V," "HV," and "UV" Certificate or Certificates of Authorization may also do this work provided they also have a valid "VR" Certificate of Authorization issued by the National Board of Boiler and Pressure Vessel Inspectors.

E. With jurisdictional approval, Owner, Operators, and Users of Boilers, Lined Hot Water Heaters, and Pressure Vessels may authorize external adjustments to bring installed Safety Valves, Relief Valves, and Safety Relief Valves back to the stamped set pressure when performed by the Owner's, Operator's, or User's trained, qualified, regular, and full-time employees. Refer to Supplement 7.10 of the National Board Inspection Code for guidelines regarding training, documentation, and the implementation of a quality system for the Owner, Operator, or User employees. All such external adjustments shall be resealed with a metal tag showing the identification of the organization making the adjustments and the date. If any valve repairs are required, they shall be done by a qualified "VR" certificate holder.

Notes

Ariz. Admin. Code § R20-5-413

Repealed effective April 12, 1979 (Supp. 79-2). New Section adopted effective April 9, 1992 (Supp. 92-2). R20-5-413 recodified from R4-13-413 (Supp. 95-1). Amended effective October 9, 1998 (Supp. 98-4). Amended by final rulemaking at 15 A.A.R. 1496, effective August 18, 2009 (Supp. 09-3). Amended by final rulemaking at 28 A.A.R. 3952, effective 12/7/2022.