Polyethylene Chemical Storage Tanks


Polyethylene Chemical Storage Tanks

SCG Process is proud to represent Poly Processing polyethylene storage systems and custom parts.  As a pioneer in the industry, their storage tanks offer robust corrosion resistance, broad chemical compatibility, minimal field maintenance, and a long life.  

Typical Markets Served:

  • Municipal water treatment
  • Industrial chemical storage and distribution
  • Oil and gas
  • Pulp and paper
  • Pharmaceutical 

Each storage system is designed specifically for the chemical it will contain.  That means that common issues like fuming, temperature sensitivity, weight and chemical reaction are all considered to create the ideal storage solution.


  • Integrally molded flange outlet
  • SAFE-Tank® Double Wall Tank System
  • Large capacity poly tanks up to 56,000 liters 
  • Lined steel vessels for transportation of corrosives
  • Bolted flange fittings
  • NSF certified for chemical storage
  • UL listing for chemical storage

IMFO®- A Better Full Discharge System

One of the biggest challenges in vertical tank design is maintaining the tank’s integrity while still allowing for the tank to be fully discharged, cleaned, and properly maintained.

Traditional tank maintenance can be a challenge with many chemicals – so Poly Processing Company has developed a unique full discharge system that helps minimize the hazards associated with traditional vertical tank maintenance.

Poly Processing’s Integrally Molded Flanged Outlet, or IMFO®, is a homogenous flange system that is molded as part of the tank while it is being manufactured, making it a stress-free part of the tank. The flange is created from the same material as the tank – it’s not an insert introduced during or at post-production. Some companies create tanks out of one substance and insert a flange, post-production, for drainage and discharge. An inserted metallic flange is common in the tank industry, but there are decided benefits to a molded full discharge fitting or IMFO®.

Let’s take a look at the main differences between a molded full discharge, and a post-production insertion.

Structure and Structural Integrity

One-piece construction enhances long-term integrity, both for the tank as a whole and in the knuckle radius, which is the point where the floor of the tank meets its sidewall. The knuckle radius is the thickest part of the tank; so, adding an insert post-production can compromise the tank. An insert can impact the tank’s hoop integrity as well, which puts the entire tank at risk of structural stress from volatile chemicals. Since the insert is made of metal, you can run into a whole new set of problems. Chemical reactions in the place where the tank material meets the metal of an insert can create a stress point for the plastic itself. This can cause leaks or cracks over a short amount of time.

An IMFO® provides a number of benefits to a chemical tank storage system that a metallic insert simply cannot. These include:

  • Flange located at the bottom sidewall of the tank – permits full tank discharge since the outlet is below the tank knuckle radius.  This eliminates the need to enter the tank for cleaning.
  • One-piece construction enhances long-term performance and the useful life of the tank since it doesn’t compromise the tanks hoop integrity or structural design.
  • Complete flange face protection is available in aggressive oxidation environments, the antioxidant OR-1000™ system can protect the discharge components from deterioration.
  • Highest amount of static head pressure – the IMFO’s® design brings you the highest net positive suction head (NPSH) of any vertical non-coned tank on the market.
  • Any required maintenance is simple and hassle free as the flange extends away from the tank wall. ­ The entire flange system is external with easy hardware access from outside the tank unlike metallic inserts.
  • There are no chemical compatibility issues like you may encounter with metallic inserts­, if the chemical is safe in a crosslinked polyethylene tank it is safe discharging out of the IMFO® system­

Tank Maintenance and Full Discharge

A molded full discharge system can empty the tank completely versus a post-production flange or metallic insert that is installed one to two inches above the knuckle radius. That one to two inches makes a big difference when the chemical being stored creates sediment – such as sodium hypochlorite does, for example.

A tank that cannot discharge the bottom sediment out could require manual cleaning, a dangerous confined space situation and time-consuming processes. The ability to fully discharge the tank is a big advantage to molded full discharge.

The Vertical IMFO® Tanks are available up to 58,000 liters and the Sloped Bottom IMFO® Tanks are available up to 55,000 liters.

Double-Wall Chemical Storage Tanks

There’s nothing more important than safely storing and handling hazardous chemicals. It’s your top priority to prevent leaks and spills of dangerous materials that can cause harm to employees, the general public, and property.

Traditionally, chemical containment systems are composed of large, concrete basins that surround a primary storage tank. While this solution adds a layer of protection, it also adds costs, square footage, and high-maintenance complications. If a spill occurs in a concrete secondary containment, the spilled chemical is usually unrecoverable because of contamination. You’ll need to clean out the containment area, replace the lost product, and possibly recoat the concrete basin.

SCG Process offers a smarter option that eliminates the drawbacks of a concrete containment system. The SAFE-Tank from Poly Processing is a double wall plastic storage tank that provides a “tank-with-in-a-tank” to safely store chemicals. The system prevents damage and injury from chemical exposure without the need for an additional containment unit.

Double wall tanks offer superior protection against hazardous chemical spills for personnel and the environment. The SAFE-Tank provides a minimum of 110% secondary containment by enclosing the primary storage tank within a sealed outer tank. Any chemical leak in the inner tank is fully contained in the outer shell.

The inner tank dome overlaps the outer tank sidewall to prevent rainwater, debris, and other contaminants from entering the containment area. You can continue to use the chemical until the primary tank is drained and an inspection is performed to find the source of the leak.

Become The Steward Of Your Plant’s Gas & Fluid Transfer, Treatment & Transport Needs.

SCG Process provides a one-stop shop, end to end solution for your water, wastewater and industrial needs.

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