Boiler and steam propulsion fundamentals

46 CFR §52.01-10

§ 52.01-10 -10 Automatic controls. (a) Each main boiler must meet the special requirements for automatic safety controls in § 62.35-20(a)(1) of this subchapter. (b) Each automatically controlled auxiliary boiler having a heat input rating of less than 12,500,000 Btu/hr. (3.66 megawatts) must meet the requirements of part 63 of this subchapter. (c) Each automatically controlled auxiliary boiler with a heat input rating of 12,500,000 Btu/hr. (3.66 megawatts) or above, must meet the requirements for automatic safety controls in part 62 of this subchapter. [CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81-030, 53 FR 17837, May 18, 1988; CGD 88-057, 55 FR 24236, June 15, 1990]

46 CFR §52.01-105

§ 52.01-105 -105 Piping, valves and fittings (modifies PG-58 and PG-159). (a) Boiler external piping within the jurisdiction of the ASME BPVC must be as indicated in PG-58 and PG-59 of Section I of the ASME BPVC (incorporated by reference; see § 52.01-1) except as noted otherwise in this section. Piping outside the jurisdiction of the ASME BPVC must meet the appropriate requirements of part 56 of this subchapter. (b) In addition to the requirements in PG-58 and PG-59 of Section I of the ASME BPVC, boiler external piping must: (1) Meet the design conditions and criteria in § 56.07-10 of this subchapter, except § 56.07-10(b); (2) Be included in the pipe stress calculations required by § 56.35-1 of this subchapter; (3) Meet the nondestructive examination requirements in § 56.95-10 of thi…

46 CFR §52.01-115

§ 52.01-115 -115 Feedwater supply (modifies PG-61). Boiler feedwater supply must meet the requirements of PG-61 of Section I of the ASME BPVC (incorporated by reference; see § 52.01-1) and § 56.50-30 of this subchapter. [USCG-2003-16630, 73 FR 65161, Oct. 31, 2008]

46 CFR §52.01-3

§ 52.01-3 -3 Definition of terms used in this part. For primary definitions associated with power boiler design, see Section I of the ASME BPVC (incorporated by reference; see § 52.01-1). (a) Types of boilers—(1) Main power boiler. A main power boiler is a steam boiler used for generating steam for main propulsion. (2) Auxiliary or donkey boiler. An auxiliary or donkey boiler is a steam boiler used for general purposes other than main propulsion. (3) Watertube boiler. A watertube boiler is a steam boiler in which the boiler tubes contain water and steam. The heat is applied to the outside surface of the tubes. (4) Internally fired firetube boiler (scotch boiler). An internally fired firetube boiler is a steam boiler containing furnaces, one or more combustion chambers and tubes or flu…

46 CFR §56.01-3

§ 56.01-3 -3 Power boilers, external piping, and appurtenances (Replaces 100.1.1, 100.1.2, 122.1, 132 and 133). (a) Power boiler external piping and components must meet the requirements of this part and §§ 52.01-105, 52.01-110, 52.01-115, and 52.01-120 of this subchapter. (b) Specific requirements for external piping and appurtenances of power boilers, as defined in Secs. 100.1.1 and 100.1.2, appearing in the various paragraphs of ASME B31.1 (incorporated by reference; see § 56.01-2), are not adopted unless specifically indicated elsewhere in this part. [CGD 77-140, 54 FR 40602, Oct. 2, 1989; 55 FR 39968, Oct. 1, 1990; USCG-2003-16630, 73 FR 65174, Oct. 31, 2008]

46 CFR §56.50-30

§ 56.50-30 -30 Boiler feed piping. (a)(1) Steam vessels, and motor vessels fitted with steam driven electrical generators must have at least two separate means of supplying feed water for the boilers. All feed pumps must be fitted with the necessary connections for this purpose. The arrangement of feed pumps must be in accordance with paragraph (d) or (e) of this section. (2) Feed pump supply to power boilers may utilize the group feed system or the unit feed system. (3) Feed discharge piping from the pump up to, but not including the required stop and stop-check valves, must be designed for either the feed pump relief valve setting or the shutoff head of the pump if a relief valve is not fitted. (Refer to § 56.07-10(b) for specific requirements.) Feed piping from the boiler, to and inc…