Oklahoma Administrative Code
Title 380 - Department of Labor
Chapter 25 - Boiler and Pressure Vessel Rules
Subchapter 3 - Administration
Section 380:25-3-2 - Frequency and criteria of inspections of boilers, pressure vessels, and hot water supply heaters

(a) Power boilers and high-pressure, high-temperature water boilers shall receive a certificate inspection annually which shall be an internal inspection where construction permits; otherwise it shall be as complete an inspection as possible. Such boilers shall also be inspected externally annually while under normal operating conditions.

(b) Low pressure boilers shall receive a certificate inspection annually.

(c) Pressure vessels, excluding those within the scope of the American Petroleum Institute Pressure Vessel Inspection Code, subject to internal corrosion and waste heat steam generators shall receive an internal inspection triennially where construction permits, and pressure vessels not subject to internal corrosion shall receive an internal inspection each ten (10) years. All pressure vessels shall be inspected externally triennially (certificates of operation may be issued on a three (3) year basis).

(d) Hot water supply heaters shall receive a certificate inspection annually if possible but biennially as a minimum.

(e) The frequency and criteria of inspection of pressure vessels within the scope of the American Petroleum Institute, Pressure Vessel Inspection Code shall be as prescribed therein.

(f) The original vessel construction shall determine the inspection criteria to be used for internal and external inspections.

(g) Based upon documentation of such actual service conditions by the owner or user of the operating equipment, the Commissioner may, at his discretion, permit variations in the inspection frequency requirements as provided in the Act.