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FAQ’s

Your Questions Answered

As well as storage, a reputable plastic tank manufacturer will be able to advise on vessels for other treatment stages including water break tanks, the mixing of slurries and for dosing applications.

The maximum tank capacity offered by your tank supplier should reflect the physical constraints of their manufacturing plant – the tank supplier should self-impose a practical limit. Subject to this, there is no limit on size. Niplast tanks are available up to 150,000 litres.

The UK’s leading plastic tank manufacturers recognise that they have an ongoing commitment to their customers, and this in itself separates the wheat from the chaff of tank builders. Tank design lives often exceed contractual defect liability periods and any respectable tank supplier will take the longer view.

The transportation, off loading and positioning of plastic tanks are very important. Although these tanks undertake extremely rigorous duties, they remain potentially vulnerable if not handled correctly. We offer a complete forwarding service, extending their responsibility through transportation to final positioning, if required.

The tank manufacturer should be able to advise on the appropriate tank furniture for the application, including specific requirements of the proposed bulk chemical supplier. This will cover venting, overflow, frost protection and fume scrubbing.

Dedicated thermoplastic bunds extend the philosophy of using a plastic tank. Bunds should be available with appropriate access to the tank and valves, and should be fitted with adequately sized anti-flotation lugs. It’s always better to bund than not to bund. Oil storage tanks must be bunded.

The design codes call for different equipment to be used to provide the necessary weld strengths. We can provide documentary evidence in support of this choice.

We operate an internal training scheme, moving fabricators through an array of skills to qualify for fully skilled status. Customers can be provided with documented proof that the fabricators are fully conversant with the necessary welding techniques.

Polypropylene, high-density polyethylene and PVDF provide resistance to a spectrum of chemicals, but issues of compatibility and material choices do not stop with the tank body. Due consideration needs to be given to valve bodies, gaskets, nuts and bolts. Some inexperienced manufacturers overlook these areas.

Central to the tank’s design will be issues including the liquid’s action on plastic types, its specific gravity, its temperature upon delivery, the mode of delivery, its stability over the storage period, its reaction with moisture etc. Understanding the liquid’s physical and chemical properties leads to an accurately specified storage tank.

No assumptions should be made here and the tank manufacturer should be able to substantiate their proposed tank build with design calculations. Current standards include Pan-European CEN standard BS EN 12573 and its forerunner, the definitive German specification, DVS 2205.

Leading companies will be able to offer up installations of their tanks to visit as references. Bulk chemical suppliers should also be able to provide names of known tank suppliers.

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    GOING BEYOND THE STANDARD

    With over 40 years of brand heritage, Niplast are experts in manufacturing plastic bulk storage tanks to strict CEN standard BS EN 12573 and its forerunner DVS 2205.

    Our long history of applying these standards innovatively to solve chemical storage problems our clients meet, is what sets us apart. Sometimes you need to think outside of the tank

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