[Code of Federal Regulations] [Title 46, Volume 2] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR61.30-10] [Page 294] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 61_PERIODIC TESTS AND INSPECTIONS--Table of Contents Subpart 61.30_Tests and Inspections of Fired Thermal Fluid Heaters Sec. 61.30-10 Hydrostatic test. All new installations of thermal fluid heaters must be given a hydrostatic test of 1\1/2\ times the maximum allowable working pressure. The test must be conducted in the presence of a marine inspector. No subsequent hydrostatic tests are required unless, in the opinion of the Officer in Charge Marine Inspection, the condition of the heater warrants such a test. Where hydrostatic tests are required, an inspection is made of all accessible parts under pressure. The thermal fluid may be used as the hydrostatic test medium.