46 C.F.R. § 52.20-1
Firetube boilers and parts thereof must be as indicated in PFT-1 through PFT-49 of Section I of the ASME BPVC (incorporated by reference; see § 52.01-1) except as noted otherwise in this subpart.
[USCG-2003-16630, 73 FR 65161, Oct. 31, 2008]