03.2020 6-3
Owner’s Manual: Smoothwall Bin
Flange bottom joints require proper tightening
to avoid leaking. Apply Loctite® LB 8150,
or equivalent, anti-seize lubricant to the bolt
threads. Then, torque each nut to 55 ft-lb.
This is the procedure for tightening the bolts:
6.3.1 Flange Condition Pre-Check:
• Check conditions of flange faces for scratches,
dirt and scale.
• Check for corrosion pitting and tool marks.
• Inspect the gasket seating surfaces.
• Check the areas on the flange where the nuts
will seat, it should be flat and free from pitting
and excessive wear.
• Ring Type Joint (RTJ) grooves must be kept
clean, corrosion free & undamaged.
Contact your Supervisor or Quality Control if
you find any uncertainties.
6.3.2 Flange Alignment:
Visually examine the flange alignment to ensure
that it fits well. While aligning the flanges make
sure that there are no residual stresses in the
joint.
IMPORTANT:
Using heat correction for the alignment
of flanges is strictly prohibited.
• Flange faces should be parallel and aligned.
• The flange bolt holes should be in line so that
the bolts will pass freely.
Fig 33 - Flange bottom on hopper
6.3 LIQUID HOPPER BIN FLANGE BOTTOM TIGHTENING PROCEDURE
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