Calculating the Number of Bolts

This may be of some general help here.

Well, it all depends on where( what part of the tank, exact location) you are planning to seal and is it circular(usually) or other shape and its dimension and number of holes you want. It should not be very hard if you check any fundamental fluid mechanics book in hydrostatic section there are a few examples dealing with pressure gradient at different level of the tank and force exerted at that particular area and by having the force and cross-sectional area you could find the pressure and say e.g you want to seal it with 4 bolts then each bolt should be able to withstand certain amount of the force, and by selecting the type of bolt you should be able to solve the problem.

If you need more help I'm sure there are many smart guys at CR4 that will help you more.

First you need a good water seal material for the joints, if they don't come along with the tank modules. Then use sufficient number of bolts to hold the seal in place for a watertight connection. At the top, where zero pressure, doesn't mean that you don't need a bolt there. I wonder if the modules came out of production without any pre-drilled holes or any means of connection for purposes of assembly.

We need to know Max Operating Pressure of the tank?

Is this a square or round tank?

Will you use flange for sealing?

Are you sealing the perimeter?

Dear sir,

1.there is static pressure of 3m head only.

2.It is square tank'.

3.yes,50mm width 4mm thick flange is used.

4.no