§ 64.71 - Marking of pressure relief devices.

§ 64.71 Marking of pressure relief devices.

A pressure relief device must be plainly and permanently marked with the -

(a) Set pressure rating;

(b) Rated flow capacity expressed as cubic feet of standard air (60 °F 14.7 psia) per minute and the pressure at which the flow capacity is determined;

(c) Manufacturer's name and identifying number; and

(d) Pipe size of inlet.