Firetube boilers and parts thereof shall be as indicated in PFT-1 through PFT-49 of section I of the ASME Boiler and Pressure Vessel Code (incorporated by reference; see 46 CFR 52.01-1) except as noted otherwise in this subpart. [USCG-2003-16630, 73 FR 65161, Oct. 31, 2008]