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Subchapter 15. Petroleum Safety Orders--Refining, Transportation and Handling
Article 17. Equipment Leakage and Breakage
§6852. Tubular Gage Glasses.
(a) Tubular gage glasses shall not be used for pressures in excess of 15 psig when containing:
(1) Harmful concentrations of hazardous substances.
(2) Liquids at temperatures above one hundred forty degrees Fahrenheit (140oF.) which remains in a liquid state when released to the atmosphere.
(3) Fluids heated to or above their autoignition temperatures.
(b) Tubular gage glasses that are operated at pressures in excess of 15 psig shall be guarded against accidental impact when located within seven feet (7 ') above or three feet (3 ') laterally from a working level or passageway.
(c) Tubular gage glasses which contain hazardous substances, or those which are operated in excess of 15 psig, shall be provided with valves that can be readily closed in case of glass breakage.
1. Amendment of section heading and text and new Note filed 9-6-94; operative 10-6-94 (Register 94, No. 36).
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