§56.50-25. Safety and relief valve escape piping.
46 C.F.R. § 56.50-25
Escape piping from safety valves must have an area of not less than that of the combined areas of the outlets of all valves discharging thereto and must be led as near vertically as practicable to the atmosphere.
Expansion joints or flexible pipe connections must be fitted in escape piping. The piping must be adequately supported so that no stress is transmitted to the safety valve body.
Safety or relief valve discharges, when permitted to terminate in the machinery space, must be led below the floorplates or to a remote position.
The back pressure effect of the escape piping on the operation of the relief device must be considered.
Notes, amendments, and revision history
Amendments
[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 40608, Oct. 2, 1989; CGD 95-012, 60 FR 48050, Sept. 18, 1995]
Source
Source: CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by USCG-2020-0634, 89 FR 50131, June 12, 2024, unless otherwise noted.
Authority
Authority: 33 U.S.C. 1321(j), 1509; 43 U.S.C. 1333; 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; E.O. 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; DHS Delegation No. 00170.1, Revision No. 01.4.
Source
Source: CGFR 68-82, 33 FR 18843, Dec. 18, 1968, unless otherwise noted.
Amendments
[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 40608, Oct. 2, 1989; CGD 95-012, 60 FR 48050, Sept. 18, 1995]