CHEMICAL CONTAINMENT SOLUTIONS

Double Walled

Vertical

Vertical Open Top

Biodiesel

Insulated Captors

Small Doubled Walled Tanks for Medical Waste

Used Oil Double Walled Tanks

Need a Used Oil Double walled containment tank?
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Double Wall Containment Vessels must be 110% - Ours are 115%

Generally, local codes mandate 110% containment. Our double wall tank series is designed for integral secondary vessel to contain 115% of the primary tank capacity
Disclaimer: When storing any chemicals, all local codes and authorities having jurisdiction should be complied with.

Polyethylene or
Polypropylene (PPL) tanks with capacity to 50K

The volume of any tank can be changed by altering the tank's height and diameter
All tanks may be optionally supplied with flanges, a man hole, a ladder and safety cage, hand rail, hold down, float level indicator, or mixer accessories.

Expedited delivery available

KEY to Image

RE - Secondary Containment
TH - Manway
E - Covered Vent
TR - Input
NF - Height Gauge
V - Flanged Suction Output
CA - Secondary Containment Cover
D - Leak Indicator
SV - Valve Support

Doublewall Outlet Assembly
Sierra Sales recommends, and certain federal, state and local regulations require that precautions are taken to prevent hazardous chemicals from spilling or leaking into our soil, lakes, rivers, streams and aquifiers.

Custom configurations in tank type (vertical, horizontal, single & double wall vessels, cone bottom, open top), diameters, height, fittings, nozzles.

If you can conceive it, we can build it!

Choice of material: P.P. or P.E - The tank material depends on the product stored as well as the storage temperature

What are these plastic resins? Read about the poly tanks resins

Choice of Tank Design:

Open vertical cylindrical tank without cover.
Closed vertical cylindrical tank with a manhole of 24" (0.5m) diameter on a slightly conical upper dome.
Cone-bottom tank with legs

Polyethylene open top tanks make great overflow basins and "day tanks". We have the size and resin required by your application; HDPE, HDLPE, HDXLPE, XLPE, and polypropylene.

We'll configure leak detection, level indicators, and all your poly tank fittings faster than any tank supplier in the industry. With numerous shipping points, we'll keep your freight cost down. Put your poly tanks on a trailer and don't forget the poly containment basins also.

Fill out our Request A Rapid Response Quote You cannot get a faster quotation in the poly tank industry.
Download Double Wall Tank Capacities PDF (148K)
Download Our Specification PDF

Custom design and engineering services at no charge

Sierra Sales's revolutionary Double Containment System is designed to alleviate the ever-changing environmental and safety concerns regarding bulk chemical storage and containment for the 21st century.

Tanks available for temperatures up to 210°F

Strongest chemical compatibility HDLPE and Polypropylene available

Top dome equipment and personnel supports and walkways

Plastic Tanks are manufactured in various thicknesses, according to the client's request and the type of substance to be stored. They are tough, heat resistant up to 99°C (210°F), environmentally friendly, recyclable and easy to mobilize. Manufacturing is done in an especially short time. It is possible to equip tanks with accessories quickly and safely, thus enabling their convenient utilization for various applications.
polypropylene tanks offer much higher working and operating temperatures. HDLPE 130°F and XLPE 140°F, whereas PPL can go to 210F depending on the chemical

Custom tank configurations that the standard rotomolding tank MFR cannot offer

Tanks Are Manufactured by Houston Tank - their engineering and manufacturing processes comes directly from Europe and Israel, so is new to the United States

Support

“We answer our phones, we return phone calls, faxes, and emails, and we are the fastest trained responders in the industry! Try us, compare us, dare us, to deliver when the traditional tank suppliers take your orders and put them on the PILE! ”
Email: New Customer Sales
Email: Office Manager
Email: Engineering
Email: Literature
Email: Service
Email: Lined Pipes

Tank Choice

When deciding on choosing a particular industrial polyethylene (PE or poly) processing TANK there are specific and general issues that must be identified to define the actual tank, the configuration of the tank and fittings, and let us not forget the cost. Cost will include the tank, the fittings and factory installation, and DELIVERY. Bulk poly storage tanks are large, and transporting these vessels can be very expensive. Deciding on the proper safe poly processing tank is dependent on the information given to the manufacturer. As always, the more accurately the issues are identified and addressed at the beginning of the process, will assure the proper HDLPE (or XLPE) safe tank will be installed, and at a lesser cost, in time and dollars, and longer life of the poly tank to the end-user. We will help you chose the perfect tank for your needs.
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Strategy

All of our tanks have been designed to the newest standards, and the only standard that applies to polyethylene tanks, ASTM D1998-06. However there are certain limitations and caveats which we can discuss with the customer to assure the proper vessel is designed and supplied.. Consult your SIERRA SALES representatives on material construction recommendations for your company's particular application We offer both high density linear polyethylene (HDLPE) and high density cross linked polyethylene (HDXLPE) tank resins to properly and correctly provide the storage and processing vessels that offer best in class performance, and at the most economical cost. We have five (5) different regionally located manufacturing plants, so we always attempt to assure freight and transport costs are held to a minimum.
Upon receiving your inquiry, we immediately go to work defining your project's specific tank requirements. Whether you're processing sulfuric acid, hydrochloric acid, sodium hypochlorite or just water, we define the entire vessel assembly in detail by line item. Now that we have completed study at Snyder Industries, Inc. Tank University, we are more able (and quicker) to choose the proper tank from any of our five strategically located plants, and fully customize the vessel for your project. From basic polyethylene bulk tank, to an engineered industrial masterpiece polyethylene vessel.

Rotationally Molded Polyethylene Tanks Offer These Advantages

Difference in resin. The advantages our HDLPE resin has over other rotomolded linear resins in tank applications Over XLPE
1. Over Linear, Medium and Low Density Polyethylene:
superior impact and stress-crack resistance

Improved weatherability
Broader chemical resistance
Lower notch sensitivity

2. Crosslink versus Linear:
"The most important advantage that crosslinkable polyethylene (XLPE) tanks have over linear polyethylene (LLDPE) tanks is that XLPE has a much higher molecular weight than LLDPE. In general, as the molecular weight of polyethylene increases, the environmental stress cracking resistance (ESCR), part impact strength, elongation, weathering, toughness, and tensile at elevated temperatures are improved."

This in fact is a true statement; however Snyder is using a TRUE HDLPE and not a LLDPE. In fact, during the molding cycle the density of resins changes and testing has shown us that we end up with a higher density with our HDLPE than with the CL200 XLPE.

We feel very confident that our studies and case histories can help us to determine the best resin for the application. Sii has always taken pride in our ability to get the full development of the physical properties of the resins which translate into chemical resistance and tank life.

Crosslinked vs. linear Advantages:
The most important advantage that crosslinkable polyethylene (XLPE) tanks have over linear polyethylene (LLDPE) tanks is that XLPE has a much higher molecular weight than LLDPE. IN GENERAL, as the molecular weight of polyethylene increases, the environmental stress cracking resistance (ESCR), part impact strength, elongation, weathering, toughness, and tensile at elevated temperatures are improved.
Wall thickness is not the only factor relevant to determining the strength of the tank. Proper material cure is more important than wall thickness in determining tank strength. Material cure is highly dependent upon the time of exposure to heat conducting through the tooling and the plastic material. Excessive exposure to high temperature will degrade the plastic material and cause a weak part. The ideal cure cycle is to reach the proper curing temperature as fast as possible, maintain that temperature for the correct period of time, and to cool the part and tooling at the proper rate of part temperature decrease. The superior Sii manufacturing process and oven capacity makes it possible to reach the proper cure temperature quickly and avoid the material degradation caused by slow oven temperature rise. Therefore, it is improper manufacturing technique to compensate for poor material cure with excessively thick tank walls.

“We answer our phones, we return phone calls, faxes, and emails, and we are the fastest trained responders in the industry! Try us, compare us, dare us, to deliver when the traditional tank suppliers take your orders and put them on the PILE! ”

Sierra Sales - PE TANKS