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In Babcock & Wilcox Water Tube Boiler the tubes can be
cleaned or replaced through
hand-holes that
are place ahead of each tube. The collecting boxes, on the boilers front side,
are in the down-end connected to a mud disposal box with a blow down valve. The
upper end of the collecting boxes by means of elbowed pipes connected to the
lying steam drum. The collecting boxes at the water tubes rear side are closed
at both ends. From the upper ends are tubes connected to the steam drum above
the water level. At normal conditions the water level will be little below the
mid-point of the boilers steam drum.
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In a Babcock & Wilcox Water Tube Boiler are the
water-tubes lying, but slightly inclining towards the boiler front. The tube
ends are connected to a number of vertically collecting boxes with almost
quadratic cross section. These are made of sheet metal and are laterally wave
shaped.
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