Hydrastep Pressure Parts Unit Description
24675030 4-7
4.5 WATER COLUMN (H.P. SUPERCRITICAL)
The high pressure water column is manufactured from 2” NB SCH S stainless steel pipe.
The inserts used are made from 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
stainless steel, 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” NB SCH S stainless 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.
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