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,� <br />PROCESSING <br />Providing Solutions Through Innovation <br />Polyethylene Tank Life Expectancy <br />For 35 years, Poly Processing Company has been Helping Our Customers ... <br />Solve Problems associated with storing hazardous chemicals, Managing Risk with the <br />Environment and Employee Safety and Growing Their Profits with Increased Tank Longevity <br />and Operating Efficiencies. We have specialized in providing hazardous chemical storage <br />solutions to the industrial, water and waste water markets. While we manufacture both linear <br />and crosslink polyethylene storage tanks; in hazardous chemical environments, crosslink <br />polyethylene is the material of choice. Our customers report crosslink polyethylene tanks <br />providing service for 10+ years with 15 to 20 years of tank service being common. However; <br />there are many factors and variables that have an effect on the useful life of any tank including <br />polyethylene. <br />Chemical. Concentration and Temperature: The chemical, concentration and operating <br />temperature are all factors influencing the life expectancy of a polyethylene tank. For example, <br />high concentrations of Sulfuric Acid are stress cracking agents and are more aggressive <br />oxidizers than less concentrated chemicals such as 25% Caustic Soda. For this reason, Poly <br />Processing offers our customers the OR-1000Tm Anti -Oxidant Systems. Another example: 12% <br />Sodium Hypochlorite will degrade from UV exposure and elevated temperatures. As it <br />degrades, sediment builds in the bottom of the tank leading to a shorter tank life. To eliminate <br />this sludge buildup, Poly Processing Company offers our customers the IMFO® (Integrally <br />Molded Flanged Outlet). The IMFO® design promotes continuous "system" flushing increasing <br />tank life and operating efficiencies. Poly Processing Company chemical storage tanks are <br />constructed from premium materials and designed specifically for the chemical, concentration <br />and temperature requirements. <br />Installation and Piping: The single biggest reason for tank life reduction is improper tank <br />installation and "hard" piping. Polyethylene's broad spectrum of chemical resistance vs. other <br />materials of construction is based on its ability to expand and contract. Flexible connections <br />compensate for tank expansion and contraction promoting a longer useful life. It is important to <br />follow Poly Processing Company's Installation Manual Instructions during the installation <br />process. <br />Venting: Often overlooked, venting is a very important step that promotes tank longevity. <br />Polyethylene tanks are rated at atmospheric pressure/vacuum. Adequate vent size is always <br />based on flow and delivery rates so it is important to gather the following information to <br />adequately determine the proper venting requirements: <br />1) Is the tank to be filled pneumatically? <br />2) Is the tank to be vented to atmosphere? <br />3) Does the length of the vent exceed 3 feet (piped to a central vent system) <br />4) Is a fume scrubbing system to be used? <br />5) Are vent screens to be used (restricts flow)? <br />6) Does the tank manufacturer offer a method of "emergency venting" to prevent over - <br />pressurization? <br />Other Items Effecting Tank Longevity: <br />1) Continuous cycling (fill / discharge) <br />2) Excessive agitation <br />3) Mobile applications <br />For further information about your specific needs or applications, please contact Poly <br />Processing Company at 1-866-590-6845 or visit our website at www.polyprocessing.com, <br />