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Unit Description Hydrastep Pressure Parts
4-6 24675030
4.4 WATER COLUMN (H.P.)
The high pressure water column is manufactured from 2” NB SCH S carbon steel pipe.
The inserts used are made from high grade stainless steel and are welded into position on
the water column body.
The top cap and the drain components of the water column are manufactured from forged
carbon steel bar, the drain components being available in ¾” and 1” sizes. A lug is machined
on the top cap to accept a vertical forked member for support of the water column when in
situ.
The steam and water connections are made from 1” N.B SCH 160 carbon steel pipe with
weld preps already machined to weld the water column to the steam system.
The electrode covers are fabricated from stainless steel with support blocks attached to the
column body. The covers are held in place by screw fasteners.
The complete assembly is of welded construction, with the welding to ASME
requirements. The materials and design are to ASME B31.1.
The completed water column undergoes pressure proof tests at 150% of duty pressure after
manufacture.
For further details on the water column dimensions, etc., refer to Figure 1.3 in Chapter 1, part
two of the manual.