CHEMICAL CONTAINMENT SOLUTIONS

Double Walled
Vertical
Vertical Open Top
Biodiesel
Used Oil Double Walled Tanks
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Capacities and Dimensions
- Industrial (ASTM-1998-06) and Commercial design standards available.
- Material options for a diverse range of applications
- High-density linear polyethylene (HDLPE)*- black and natural white color - complies with FDA Regulation 177.1520 and NSF/ANSI 61 standards.
- Cross-linked, high density polyethylene (XLPE) - black and natural white color
- Opaque white sodium hypochlorite resin #880059 (up to 12,500 Gal.)
- Sulfuric acid resin #880046 (up to 15,000 Gal.)
- Available with IBC 2006 seismic and 150 mph wind restraint tie-down systems.
- Specific gravity ratings are based on the industry's most severe calculation.
- Standard specific gravity choices are 1.5 and 1.9, other ratings are available upon request.
- All materials are UV stabilized for long-term outdoor service.
Our straight forward, honest, and working for you at a lower profit margin than our competition will please your engineering and purchasing personnel.
Download the Sierra Specification for Polyethylene Upright Storage Tanks
SULFURIC ACID STORAGE SOLUTIONS
![]() “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!
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![]() 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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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. |
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! ”