Design & Engineering


For over two decades, West Coast Poly has been at the forefront of delivering high quality liquid storage products rooted in excellent design and engineering standards. Spanning a diverse range, our storage tanks are the result of meticulous design processes led by our in-house designers and collaborating closely with external engineering firms like MA Deacon Engineers and David Beneke Consulting. Tapping into a wealth of experience across roto-moulding, heavy engineering design, and manufacturing across industries such as mining, mineral processing, oil & gas, and transportation.

Central to our design philosophy is the integration of rigorous Finite Element Analysis (FEA), scrutinising every conceivable environmental stressor our tanks may encounter. From temperature variations to fluid dynamics, static and dynamic loads, continuous cycling, wind forces, and vibration, each factor is meticulously assessed. The results of these exhaustive tests inform the engineering of our tanks, so they not only meet the requirements of AS/NZS 4766:2020 but exceed them. Ensuring our customers receive a tank that can endure the harshest conditions with unwavering performance.


(PE) – Light, versatile synthetic resin made from the polymerization of ethylene. Polyethylene is a member of the important family of polyolefin resins. It is the most widely used plastic in the world, and is considered one of the safest forms of plastic.

West Coast Poly has a range of standard mould sizes from 320L to 50,000L. Once manufactured the tanks can then be fitted with nozzles and features to suit specific client requirements.

The tanks can be used for numerous applications and all types of processes including water, chemical and effluent, as well as potable water supply and material blending or mixing.



West Coast Poly tanks are produced using the roto moulding system which allows one piece construction under controlled conditions with a material that is rugged, durable and shows outstanding chemical and environmental resistance.

The process is a four-stage system which is inherently efficient:

The polyethylene is tested for dry flow rate and bulk density before a set quantity is loaded into the mould. The mould is then heated while being subjected to multi-directional revolutions so that a specified wall thickness is achieved over the vessel wall. The material is taken to a specified temperature to ensure homogeneity before moving to the cooling phase. The mould continues to rotate during the cooling phase so that it retains its shape.

When the plastic has cooled sufficiently the finished part is removed from the mould and subjected to ultrasonic measurement and low temperature impact testing.

Design Engineering Manufacturing Process E1651508148405


At West Coast Poly, our in-house Engineering & Technical Team can provide both 2D drawings and 3D models, providing increased design, flexibility and accuracy.

  • Our Team can provide clients with the ability to create and validate specific designs to suit individual projects.
  • Advise on product data with regards to subassemblies, components, material specification and bill of materials.
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West Coast Poly - Cad Drawing - Design And Engineering

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Cad Drawing Wcp Designengineering 2022


West Coast Poly can assist with your custom-made enquiry, after assessing your specific design requirements, our engineering team ensure the service provided is second to none.

We can assist from project conception, through design and engineering, to delivery of the purpose specific product.

Our consultation assures customers that the product is designed to achieve their specifications.

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