The inside of a 670MW pulverized coal fired boiler, taken from several observation ports on different elevations.

This natural-circulation boiler produces superheated steam rated at 1000F, 2400 PSI at 4,900,000 lbs/hr of steam flow.

This steam turns a 900,000 HP steam turbine.

Total amount of tubing in the boiler: 31 miles.

Always use common sense and proper protective equipment when observing any boiler.

Updated on 3/12/11 with annotations.

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