California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 1 - Unfired Pressure Vessel Safety Orders
Article 3 - Air Tanks
Section 465 - Safety Devices and Systems
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) Each air tank shall be protected by 1 or more safety valves and other indicating and controlling devices that will insure safe operation of the tank. If the tank has a volumetric capacity in excess of 2,000 gallons, it shall be fitted with at least 2 safety valves, the smallest of which shall have a relieving capacity of at least 50 percent of the relieving capacity of the largest valve.
(b) Safety relief valves shall:
(c) Discharge pipes from safety valves and rupture discs installed on air tanks shall:
(d) Each air tank shall be equipped with a suitable pressure-indicating gage with the dial graduated to approximately double the operating pressure, but in no case less than 1.2 times the pressure at which the safety-relieving device is set to function.
(e) Each air tank shall be equipped with a manually operated, valved drain located at the lowest point where water can collect. The valve for this drain shall be suitably located for convenient operation. Automatic drains shall not be considered as complying with this order unless also equipped with a manually operated by-pass.
NOTE: It is recommended that each air tank be completely drained of accumulated moisture at least once during each day of operation.
1. Amendment filed 12-8-72 as procedural and organizational; effective upon filing (Register 72, No. 50).
2. Amendment of subsection (a) filed 10-25-74; effective thirtieth day thereafter (Register 74, No. 43).
3. Amendment filed 1-5-88; operative 2-4-88 (Register 88, No. 4).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.