Tank Manway Lids

We have recently become aware of tanks that have failed testing due to leaking through the manway lid.
When installing a tank is important to ensure that all the bolts on tank manway lid/s are tightened once the tank is in the ground.

The recommended sequence is to start at 6 o’clock then go to 12 o’clock and then continue the same sequence clockwise. It is also important not to overtighten the bolts, they should not exceed 169 newton metres.