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Subchapter 7. General Industry Safety Orders
Group 3. General Plant Equipment and Special Operations
Article 17. Engines and Compressors

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§3518. Air Compressors.

(a) Air compressor discharge lines having a block valve between the air receiver and compressor shall have a pressure relieving safety device installed in the line between the compressor and block valve. The pressure relieving safety device shall be set to open at a pressure not to exceed the rated working pressure of the cylinder. The relieving capacity of the pressure relieving safety device shall be such as to prevent a rise of pressure in the compressor cylinder of more than 10 percent above its maximum allowable working pressure, and the discharge shall be to a safe place.

(b) Air compressor intake lines shall not be located in toxic atmospheres or atmospheres containing explosive concentrations of flammable gases or vapors.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


1. Amendment filed 12-16-85; effective thirtieth day thereafter (Register 85, No. 51).

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