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I ran into a working rice coal burning steam boiler in Brattleboro Vt.
Its a steel National Radiator Company It has the main name plate stamped into
it with the Big "H" symbol Relief valve cap. 5360 lbs /hr and then it has the
letters - HSB 17271 Boiler Number AC6015 S/N 8334
does any one know what the HSB stands for? Also what that means for the
number after it of 17271?
Still looking to find out what the letters HSB 17271 mean.