Section 53.01-5 - Scope (modifies HG-100)(a) The regulations in this part apply to steam heating boilers, hot water boilers (which include hot water heating boilers and hot water supply boilers), and to appurtenances thereto. The requirements in this part must be used in conjunction with Section IV of the ASME BPVC (incorporated by reference; see § 53.01-1 ). Table 1 to § 54.01-5 of this subchapter gives a breakdown by parts in this subchapter of the regulations governing various types of pressure vessels and boilers.(b) (Modifies HG-100.) The requirements of part HG of Section IV of the ASME BPVC must be used except as noted otherwise in this part.USCG-2003-16630, 73 FR 65163 , Oct. 31, 2008