Coast Guard Regulation (46 CFR) requires that after undergoing extensive repairs, an auxiliary boiler, with a maximum allowable working pressure of 60 psig (411.89 kPa), should be hydrostatically tested at a pressure of __________.
• 46 CFR requirements for hydrostatic testing of boilers after major repairs • Relationship between maximum allowable working pressure (MAWP) and test pressure • Typical percentage of MAWP used for hydrostatic tests on low-pressure auxiliary boilers
• Start by recalling what 46 CFR says about how many times the MAWP you must use for a hydrostatic test after extensive repairs. • Compare each choice to 60 psig and think: which option matches the regulatory percentage or multiplier, rather than just being a round number? • Ask yourself whether the Coast Guard typically requires a test pressure slightly above, significantly above, or exactly equal to the MAWP to prove safety after repairs.
• Calculate each option as a percentage of 60 psig and see which one lines up with the regulation (for example, 125% vs 150% vs 200%). • Make sure the test pressure you choose is high enough to demonstrate safety but not unreasonably high for a 60 psig auxiliary boiler. • Verify in 46 CFR whether the rule for test pressure is stated as a fixed psi value or as a multiple/percentage of the MAWP.
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