Section 162.018-6 - Marking(a) Each safety relief valve shall be plainly marked by the manufacturer with the required data in such a way that the marking will not be obliterated in service. The marking may be stamped on the valve or stamped or cast on a plate securely fastened to the valve. The marking shall include the following data:(1) The name or identifying trademark of the manufacturer.(2) Manufacturer's design or type number.(3) Size ____ inches. (The pipe size of the valve inlet).(4) Set pressure ____ p.s.i.(5) Rated capacity ____ cubic feet per minute of the gas or vapor (at 60 °F. and 14.7 p.s.i.a.).(6) Coast Guard approval number. The minimum wording for showing approval shall be "USCG 162.018/" or "USCG 162.018-fn-46-162-018-6-1 ".CGFR 68-82, 33 FR 18908, Dec. 18, 1968, as amended by USCG-2001-10224, 66 FR 48620, Sept. 21, 2001