Safe Handling of Tank Containers - ITCO

ICHCA International Safety Panel Briefing Pamphlet No 30
A6.2.2.2 The following steps should be taken when opening manway lids:
Loosen the hand nuts on the swing
bolts by rotating the hand nuts anticlockwise,
keeping the swing bolts
upright and located in their receiving
bracket. Start with the hand nuts
closet to the hinge and proceed in
the order shown in Picture A6 5.
Do not swing the swing bolts
away from their receiving
bracket.
Wait for full evacuation of any
residual pressure that might have remained into the tank.
Pull the manway lid handle firmly upwards in order to release the
gasket and then let it back.
Complete the unscrewing of the swing bolts, then swing them away
from their receiving bracket in the same order as shown in Picture
A6.5
Open the manway lid by rotating it around its horizontal spindle
(hinge).
A6.2.3 Closing the Manway Lids
A6.2.3.1 The following steps should be taken when closing manway lids:
Check the gasket and gasket receiving surface for cleanliness and
remove any dirt or grit.
Position the coverlid gasket in front of the neck ring sealing surface
Close the manway lid
Swing the swing bolts to the upright
position and position them in their
receiving bracket
Rotate the hand nuts clockwise in
order to tighten the swing bolts.
Tighten in the order shown in Picture
A6.6
Lock-tighten the swing bolts with a
torque of 3 m daN in order to ensure
gasket tightness
Note 1: It is recommended that a torque wrench be used to ensure that the
correct torque is applied
Note 2: Although a torque of 3 m daN should be necessary to ensure
proper leak tightness, it is acceptable to apply a torque up to 10 m
daN if required with no risk of damaging the swing bolts, manway
lid and receiving brackets.
Page 71 ©ICHCA International Limited
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Picture A6.5
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Picture A6.6
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