Also, the thickness of the iron in steam drums was low by modern standards.

Circulation is completed by the link pipes between the steam drums.

To remedy the problem, the steam drums had to be moved to the top of the boilers.

Riveted, steel steam drums are seated on the tops of the enclosures.

It has two water/steam drums.

The sprouts are grown in large steam drums that create ideal conditions for various types of bacteria to grow, The Guardian said.

The steam drums and their interconnecting tubes are of relatively small diameter with thick walls and therefore much stronger.

The tubes, and the water drums in turn, are hung from the steam drums, again to allow free expansion without straining the tube ends.

The tubes are arranged in near-vertical banks between a number of cylindrical, horizontal steam drums (above) and water drums (below).

The steam produced in the receivers is collected in a series of pipes, routed to steam drums, and then to the two turbine generators.

Water level is maintained with the steam drums approximately half-full, so the tubes operate in the "drowned" state with their upper ends permanently submerged.

The steam drums and, (in a 5-drum boiler) the water drums, are however linked by short horizontal pipes and these form part of the circulation circuit.

Where a superheater is fitted, it is installed as straight or hairpin tubes in the upper part of the boiler between the first two steam drums.

The heated water-tubes were a large number of small diameter tubes mounted between large drums: the water drums below and steam drums above.

Wisconsin Electric, which had planned to spend about $71 million to replace cracked steam drums, says the work is routine maintenance and should not draw tougher air standards for new plants.

Cessco is a leader fabricator of carbon steel steam drums and mud drums for the pulp & paper, power generation, oil & gas and petrochemical industries.

They consist of a large brick-built chamber with a sinuous gas path through it, passing over near-vertical water-tubes that zig-zag between multiple steam drums and water drums.

The setting of the boiler is a large brick-built enclosure, but the steam drums are suspended from a separate girder framework inside this, so as to allow for expansion with heat.

The steam drums were at first mounted so low that the engines worked with water rather than steam, so the drums had to be moved to the top of the boilers.

The set of pumps in the Water Room guaranteed it would travel, since it placed the water at a pressure of 52kg/cm2, enough to overcome the opposing pressure in the boilers' steam drums.

The water resulting from this condensation of steam was suctioned by the extraction pumps and sent once again to the boilers' steam drums, passing first through the water heaters, feed tanks and pumps, and finally to the economiser.

Single pressure HRSGs have only one steam drum and steam is generated at single pressure level whereas multi pressure HRSGs employ two (double pressure) or three (triple pressure) steam drums.

The survey, conducted in the Azores, found that her deck leaked, her condenser was irreparable, her steam drums were badly worn down and could generate less than half the steam pressure they were supposed to, her crew quarters were uninhabitable, and living conditions were very bad.

To inject chemicals into the boiler drums of small, stationary, low pressure boilers.

The boiler Drum is a pressurised high tensile steel chamber where the water boiled into steam.

A specialized type of HRSG without boiler drums is the once-through steam generator.

A steam driven Main Boiler Feed Pump (MBFP) pumped the water through the boiler Economiser and into the boiler Drum.

The makeup water in a 500 MWe plant amounts to perhaps 120 US gallons per minute (7.6 L/s) to replace water drawn off from the boiler drums for water purity management, and to also offset the small losses from steam leaks in the system.