SC Boiler Installation Practice Questions - South Carolina Boiler Installation Contractor Examination Exam

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With the burner at maximum firing rate, ASME Section IV requires that the pressure in a steam heating boiler cannot rise more than 5 psi above MAWP. If MAWP is 15 psi, what is the maximum permitted accumulation pressure, and what blowdown range is required of the safety valve?

20 psi accumulation and a controlled blowdown of 2 psi to 4 psi 22.5 psi accumulation and no specified blowdown 30 psi accumulation and 2 psi to 4 psi blowdown 16.5 psi accumulation and 10 percent blowdown

Correct Answer:

20 psi accumulation and a controlled blowdown of 2 psi to 4 psi

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