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At first glance, most polyethylene storage tanks look pretty similar. It’s hard to tell the difference between a robust, well-designed tank and an inferior one. Over the years, we've found that many customers aren’t aware of the construction standards for polyethylene tanks, or they believe that all tank manufacturers follow the same standards.

Municipal projects require detailed specifications for anything purchased as a capital expense. At Poly Processing Company, we’ve teamed up with national engineering firms to develop pre-written engineering specifications for our three most popular tanks: the SAFE-Tank®, the vertical tank with IMFO® and the upright vertical tank.

Poly Processing is committed to ensuring that our polyethylene chemical storage systems are NSF/ANSI 61 certified. In our previous article on NSF, we looked at NSF/ANSI 61 and what it means to be certified. There can be some confusion about whether tanks or tank systems are certified to NSF/ANSI 61 and which certification is valid for which tank.

Most products that come in contact with potable water are tested under NSF 61 with the pH 5, pH 8 and pH 10 exposure waters defined in the standard. These exposure waters were designed to simulate the wide variety of potable water chemistries encountered across North America. However, these exposure waters were not designed to predict leaching of materials caused by aggressive chemicals.

It’s easy to get confused between NSF certification, FDA approval, and FDA requirements. Which terms do you need to be familiar with, and what should you expect from your chemical storage tank? These are good questions, and it’s important to understand the differences between NSF and FDA as you prepare to purchase a storage system.

It’s hard to judge, with the naked eye, how a polyethylene tank is constructed. On the surface, a tank is just a tank. However, there is a big difference between a well-designed, properly constructed tank and a cheap one that doesn’t meet structural requirements.

We get a lot of questions about the standard testing on chemical storage tanks that we do at our facility. Vertical tanks larger than 500 gallons are extensively tested to ensure that they meet ASTM standards. Depending on customers’ needs, we also offer additional testing on our chemical storage tank systems.

Are you familiar with the latest updates to the NSF/ANSI 61 standards? We cover everything you need to know in our article featured in the June 2019 edition of Environmental Science & Engineering Magazine.

If you manufacture, sell or distribute water treatment or distribution products in North America, your products typically must comply with NSF/ANSI Standard 61. NSF/ANSI 61 sets the criteria for water system components to protect health standards. It’s important that all components in water treatment meet the correct standards to ensure dangerous toxins aren’t leached.

However, there is confusion about NSF-61 certifications, and that confusion could lead to purchasing the wrong product for your application. Let’s explore NSF/ANSI 61 and how to make sure your chemical storage tank system meets the necessary requirements.

How do you know by looking at a chemical storage tank how well it’s constructed? There’s a big difference between a well-designed, properly constructed tank and an inexpensive one that doesn’t meet structural requirements. But it takes more than the naked eye to spot critical flaws.