high pressure boiler Agent maximum steam pressure in


Chapter 10: Boilers Water Heaters and Pressure Vessels ...

High-pressure steam boilers with input not. exceeding 5000000 Btu/h. 3: High-pressure steam boilers with input in . excess of 5000000 Btu/h. 7: Steam-heating boilers and hot water-heating. ... Where the allowable working of the exceeds 100 psig (689 kPa) ...

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Operating Controls - National Board of Boiler and Pressure ...

Steam boilers require a device which senses steam pressure and cycles the burner or other source of heat in order to maintain a consistent predetermined operating pressure. A second device is used to prevent the from exceeding the allowable working (MAWP) indicated on the nameplate.

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