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Good day to everyone,

I have a little old boiler and I need that work . but i dont know how to calculate the vapor horse power that it can generate.
Someone could please help me to determine the vapor horse power? or guide me how to do it.

I have a few data extracted from the old boiler:

Shell: ØOD 505.56mm, h 1220mm
Head: Thorispherical (IKR:50.8mm and R454)
30 pipe Ø1"sch10x1420mm
T: 2.78mm
Material ASTM A240 TP 304

I know that work at 0,689476 mpa and 100ºC.
Use Natural gas to heat
Use 8 liter of water

It dont have manofacturer, design data.... just the form in the attached picture.

I dont know if I need more data to calculate.

Thanks for the help.