46 C.F.R. § 61.30-5 Preparation of thermal fluid heater for inspection and test.
Title 46 - Shipping
For visual inspection, access plates and manholes shall be removed as required by the marine inspector and the heater and combustion chambers shall be thoroughly cooled and cleaned. [CGD 80-064, 49 FR 32193, Aug. 13, 1984, as amended by CGD 95–027, 61 FR 26002, May 23, 1996]
Title 46: Shipping
PART 61—PERIODIC TESTS AND INSPECTIONS
Subpart 61.30—Tests and Inspections of Fired Thermal Fluid Heaters
§ 61.30-5 Preparation of thermal fluid heater for inspection and test.

