25 September 2017

All you need to know about water storage

Ahead of a number of international exhibitions that Balmoral Tanks will be appearing at we thought it would be useful to put together a brief summary of tank choices available to you and your project.

For more detailed information please be sure to visit us if you are attending WEFTEC (Chicago), Fenasan (Sao Paulo), Aquatech (Amsterdam) or Big 5 (Dubai) before the end of 2017. It would be great to see you.

There are a number of different tank options available when considering water and/or wastewater storage. Here we provide guidance on how to select the correct tank for your project and how to maintain it to provide long and trouble-free service.

First up: what type of tank do I need?

When it comes to large volume water or wastewater storage it is important to realise that you have a choice of tank-type and that the one you choose must suit the particular project or installation being working on.

The following tanks are suitable for storing potable and non-potable water, irrigation, rain/storm water and fire fighting sprinkler system water. They are used widely in the anaerobic digestion, utilities, residential, commercial, construction, health care, food processing and agricultural sectors.

Cylindrical steel water tanks

These are available in fusion bonded epoxy coating, galvanised and stainless steel and the range of materials offered provides cost effective and project specific options for the anaerobic digestion, potable, irrigation, fire protection and wastewater sectors, amongst others.

They are built using lifting jacks allowing the tanks to be erected within days by a small team. This process of being built ‘from the top down’ reduces health and safety risks by removing the requirement of working at height.

Cylindrical tanks are available in capacities from 10,000 to over 4,000,000 gallons.

Being a very flexible product in terms of size the tank can be built to greater heights using a smaller footprint if desired or can be of greater diameter and lesser height depending on space availability.

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GRP sectional water tanks

These tanks are built on site by bolting together panels which typically measure 3.3x3.3ft and 3.3x1.65ft; a sealant is placed between each panel to ensure water-tightness. GRP tanks are generally accredited to 13ft in height and can be built to almost any width and depth. They are commonly used to store water in capacities of 264-26,420 US gallons with insulation options being available.

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Steel sectional water tanks

Steel panels should be manufactured to BS1564:1975 Type 1 (Hot Pressed) standards and bolted to the adjacent panel using an approved sealant. The panel thicknesses depend upon the size and depth of the finished tank and range from 1/8th-1/6th inch. Tanks are built on site to 16.5ft in height and to any width and depth giving almost infinite storage capacities.

Steel sectional tanks are specified over GRP where there is a risk of earthquakes as they are less likely to fracture when seismic activity takes place.

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Inspection, maintenance and repair

As with any product it is important that water tanks are inspected and maintained regularly. Regular maintenance should include internal and external visual inspections and, where required, ultrasonic thickness measurement, internal ROV inspection, cleansing and disinfection. Roof structures and supports should be inspected, fittings and fastenings checked, internal and external seals and seams should be checked for water-tightness.

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