Frequently Asked Questions

• General

• Is there some way to tell when my tank was made?

  Snyder tanks are produced with a molded-in serial number (wheel-date/month format). In addition, the tank's bar code label has a 10-digit serial number and date of manufacture. Your Snyder Sales or Customer Service person can help you interpret the date of manufacture.

  Contact us to discuss your requirements of Three Cubic Horizontal Low-Temperature Storage Tank. Our experienced sales team can help you identify the options that best suit your needs.

• Will freezing temperatures hurt my poly tank?

  Freezing temperatures will not have an effect on a polyethylene tank, however, if there is liquid in the tank, make sure the freezing liquid has enough head room to expand.
  
  Snyder utilizes a test called "Low Temperature Impact Resistance." This is a test utilized by both the ARM (Association of Rotational Molders) and ASTM D . Snyder has testing capabilities that exceed the requirements of ARM and ASTM D . They call out -20 degrees F for the test, but Snyder has conducted testing at -40 degrees F. This test is critical to determine if the resin has been properly processed and it will give you an idea as to the temperatures that the resins can see. It is important that efforts be made to avoid impacting the tank, especially with sharp items, at any temperature.

• How many years will my tank last?

  There are many variables that can have an effect on the life of a polyethylene tank.
  
  The type of material being stored in the tank, it's concentration, and temperature. The temperature of the application can be a factor, especially if the tank design is not based upon the temperature of the application. Some applications may permeate the polyethylene at elevated temperatures. Special considerations - some chemicals will have long term effects on the polyethylene and may require special considerations. As an example, sodium hypo chlorite will degrade from UV exposure and elevated temperature. As it degrades it can build up sediment in the bottom of the tank. If this sediment is periodically flushed from the tank it will extend the life of the tank.
  
  Installation and PIPING! - The number one reason for tank failures is due to improper installation. It is important to follow Snyder's "Guidelines for Use & Installation". Having flexible connections that compensate for the expansion and contraction of the tank will extend the life of the tank.
  
  Is the tank used indoors or outdoors? The amount of U.V. exposure will be based upon the time of exposure and the closeness of the installation to the sun (elevation). What part of the country are you in? Tanks used outdoors in states subjected to more intense sunshine will be more affected by the sun. UV rays will have a detrimental effect on the life span of all poly tanks.
  
  Storage or process - Is the tank a holding tank or a processing tank? A tank that is continuously cycled will see more stress then a tank that remains at one level or close to one level for extended periods of time. Tanks with excessive agitation may also be exposed to undo stress. Stationary tanks will also not see the stress of a tank that is being transported.

• What is the warranty on your tanks?

  Snyder warrants to the purchaser for any manufactured tank product proven to be defective in material or workmanship within 3 years from date of original invoice from factory. An extended tank warranty may be available as a purchased option for an additional 2-year period (total of 5 years) for some chemical applications. Snyder also offers chemical specific warranties for industrial vertical & double wall tanks for certain chemical applications including sulfuric acid, sodium hypochlorite and others. Contact Snyder on questions regarding warranty for your specific application.
  
  Snyder warrants to the purchaser for any manufactured Intermediate Bulk Container (IBC) or dry material handling product proven to be defective in material or workmanship within 2 years (for polyethylene) and 1 year (for steel) from date of original invoice from factory. Contact Snyder on questions regarding warranty for your specific application.

• Can your tanks be buried?

  Tanks specifically designed for above ground use cannot be put underground because the weight of the ground around the tank can cause the wall to collapse. If you have an application for a below ground tank we do have a cistern and septic tank line available that is designed for below ground use.

• Can your tanks be pressurized?

  No, our tanks cannot be pressurized. They are all designed to atmospheric pressure.

• Can I store DEF (Diesel Exhaust Fluid) in your tanks?

  Yes, see the DEF listing on our Chemical Resistance Recommendation Chart. DEF is a high purity chemical solution containing 32.5% urea mixed with high purity water. It is classified as a non-hazardous product. Snyder Industries has a long history of proven success providing both bulk storage tank and IBC solutions for urea storage. DEF will begin to crystallize at 12º F. and can lose its potency if stored for prolonged periods over 86º F so precautions should be taken (such as heat trace and insulation) to ensure these conditions are avoided.
  
  The EPA has set forth stringent emissions requirements to being January which will require diesel engine manufacturers to choose a technology called Selective Catalytic Reduction (SCR) to meet the requirements. When added to the exhaust gases DEF reduces the NOx to the EPA required levels. If you purchase a car, truck, tractor or any diesel-powered product with SCR technology it will require DEF. There will be a separate DEF tank on diesel vehicles to hold the DEF to be sprayed into the exhaust system.
  
  DEF will be sold at service stations offering diesel fuel across the USA in capacities ranging from gallon jugs, drums, IBCs, and bulk dispensing systems. DEF will also be used by companies who have their own fleet of diesel and fueling stations.

• Can I store Bio-diesel in your tanks?

  Biodiesel is the name of a clean burning alternative fuel, produced from domestic, renewable resources. Biodiesel contains no petroleum, but it can be blended at any level with petroleum diesel fuel to create a biodiesel blend. Biodiesel or B100 (100%) refers to the pure fuel. Biodiesel blends or BXX refers to a fuel that is composed of a % of biodiesel blended into a conventional fuel (example B20 = 20% Biodiesel blended with 80% conventional fuel).
  
  Snyder has conducted chemical compatibility testing on B100. Our chemical compatibility testing showed that Snyder&#;s uniquely processed HDLPE and XLPE resins are compatible with B100. From our chemical compatibility testing, Sii recommends ONLY above ground 1.9 specific gravity Industrial (ASTM) designed tanks for B100 applications. Snyder does not recommend below ground, agricultural or other non-ASTM designed tanks to be used in this application.
  
  Snyder&#;s warranty for biodiesel B100 applications is one year (1) against defects in material and workmanship. Snyder may offer additional warranty other than the one (1) year warranty stated above. In such cases these warranty statements will be in writing only from Snyder.
  
  Snyder&#;s chemical compatibility testing does not include any biodiesel blends so Snyder has no recommendation for biodiesel blends at this time.

• Can I store petroleum products in your tanks?

  We do not recommend storing petroleum products in our tanks because they will permeate (soften) the tank walls. Contact Snyder with your specific application. You will find that aromatic hydrocarbons and halogenated hydrocarbons will not be recommended for polyethylene.

• What is the maximum temperature that your tanks will withstand?

  Linear polyethylene (HDLPE) storage tanks have a maximum storage temperature of 130 degrees F. Cross-linked polyethylene (XLPE) storage tanks have a maximum storage temperature of 140 degrees F.
  
  NOTE: The leading manufacturers in this industry design their tanks based upon 100 degrees F with ASTM D calling out 73 degrees F. It is important to contact the factory when your application will continuously be above 100 degrees (ambient). The tank can be designed specifically for your elevated temperature application.

  Additional resources:
  How is Methyl Methacrylate synthesized industrially?

  The company is the world’s best Cryogenic Lng Storage Tanks supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

• Are your tanks FDA compliant?

  The resin used to manufacture our linear polyethylene tanks (HDLPE) meet specifications contained in FDA Regulations 21 CFR 177., © 3.2 and so may be used as an article or component of articles intended for use in contact with food, subject to any limitations in the regulation. Cross-linked polyethylene (XLPE) tanks do not meet FDA regulations. The HDLPE resin that Snyder uses is also NSF 61 listed.

• What is the wall thickness of your tanks?

  Because Snyder tanks have a stratiform wall thickness (varies from top to bottom on a tank), wall thickness is not the best gauge for determining the quality of a tank. The actual weight of the tank is also not a good comparison when shopping for tanks. Just because a competitor may use more material in the tank does not make it a better tank. That is determined by the resin, mold design and the steps taken during the rotomolding process. Lower grades of resins will require a thicker tank wall to compensate.

• How heavy a material can polyethylene tanks hold?

  A tank with a specific gravity of 1.5 can hold a liquid up to 12.5 pounds per gallon at 100 degrees F. A tank with a specific gravity of 1.9 can hold a liquid up to 15.75 pounds per gallon at 73 degrees F. Please note that an increase in liquid temperature will substantially decrease the specific gravity rating. Also, certain chemicals have environmental stress cracking agents in them so higher specific gravity tanks are needed to compensate even though the weight of the chemical may be lower. Please refer to the Snyder Chemical Resistance Recommendation Chart or call Snyder Industries to determine which tank design is best suited for the chemical application.

• Which tank material is best?

  General guidelines of material selection are not advisable. It is always best to provide the tank manufacturer with specific application details (chemical, concentration, specific gravity, temperature, dimensions, mechanical loading) so a proper tank design recommendation can be made by the factory and/or your Snyder distributor.

• What material does Snyder use to manufacture its poly tanks?

  Snyder uses HDLPE (high density linear polyethylene) to manufacture our tank line. High density linear polyethylene has good structural rigidity and impact resistance. It is resistant to a broad range of chemicals including sulfuric acid, sodium hypo chlorite, and sodium hydroxide.
  
  We also offer, for specific applications XLPE (cross-linked polyethylene). Cross-link polyethylene has excellent structural rigidity and impact resistance. It is used as an alternative to HDLPE for storing surfactants or solvent-based chemicals, or for higher service temperatures.

• What chemicals can I store in your tanks?

  Poly tanks have a broad range of chemical resistance to both Agricultural and Industrial chemicals. For Industrial Chemicals refer to the Snyder Chemical Resistance Recommendation Chart on that site or contact the chemical supplier to see if their product is compatible with high density linear polyethylene (HDLPE) or cross-linked polyethylene (XLPE). If they cannot answer your question, call Snyder Industries and we will be happy to research it for you. Try to have as much information available as possible such as the temperature of the product, the percent concentration of product (Ex: Sodium Hypo chlorite, 15%) etc.

• What makes poly tanks a good choice for my chemical storage/application?

  Poly tanks are lower cost than stainless steel or fiberglass. Lightweight - less than one-half the weight of steel. Seamless construction for easy cleaning and leak proof service. Exceptional Impact resistance. Broad range of chemical resistance. Better weatherability. Available in a variety of resins. Translucent when molded of natural resin for visible liquid level. Virtually maintenance free.

• Do your tanks have a UL rating?

  The tanks themselves do not have a UL rating. However, UL 94 groups materials into categories based on their flammability. The polyethylene we use (ExxonMobil HD ) has undergone the horizontal flame test and has a UL94HB rating which means that specimens must not have a burn rate greater than 1.5 inches (40 mm)/minute for thickness between .120 and .500 inches (3-13 mm) and 3 inches (75 mm)/minute for a thickness less than .120 inches (3 mm). Specimens must stop burning before the flame reaches the 4 inch mark.

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