Product Introduction

FF double-wall tank refers to the oil storage tank whose inner layer and outer layer are made of FRP material.
3DFF® double-wall tank is the proper name of the double-wall tank produced by A&Z using proprietary technology, and it is also the registered trademark of A&Z for the oil tank produced by 3D composite material technology.
Our fiberglass tanks provide safe, long-term underground storage.
Tank owners and system designers of underground fuel systems need tanks that provide secure storage of fuel over time. Xerxes by Shawcor fiberglass double-wall tanks are an excellent solution because they are corrosion-resistant, both inside and out. Our tanks have a proven record of compatibility with traditional petroleum fuel as well as with new biofuels, which are increasing in use.

Fiberglass tanks are not vulnerable to problems inherent in storing highly corrosive ethanol-blended fuels (E10, E15, E85), biodiesel fuels and ultra-low sulfur diesel (ULSD). Nor are fiberglass tanks vulnerable to rust caused by corrosive soil environments. Options such as protective coatings and cathodic protection don’t guard entirely against external corrosion and rust. Neither do they provide protection against the fuel industry’s largest challenge – internal corrosion of metallic tanks and accessories. This makes Xerxes fiberglass double-wall tanks a superior choice for a wide range of fuel applications. Where a nearby aquifer, river, lake or stream may call for protection beyond secondary containment, our triple-wall fiberglass tanks an extra level of security.

Features:

● UL-listed (1316) and ULC-listed (615) for alcohol fuels

● 100% premium fiberglass and resin

● Corrosion-resistant inside and out

● Secondary containment around full circumference of tank

● Double-wall, triple-wall and multicompartment models

● Structurally strong cylindrical tank with integral rib construction

● 3D glass fabric (Parabeam®) bonding the tank walls together for added strength

● Designed to withstand surface H-20 and HS-20 axle loads

● Lightweight so easy to ship and easy to install

● Monitoring options – dry and hydrostatic

● Accessories fitting a variety of applications

● Available in capacities up to 50,000 gallons in the US

● Available in capacities up to 155,000 liters in Canada

● 30-year limited warranty

Benefits

(1) Corrosion Resistance and Fuel Compatibility

● External corrosion protection will always be a concern, but, with the widely use of ethanol-blended gasoline (E10, E15, E85), biodiesel fuels and ultra-low sulfur diesel (ULSD), the focus has shifted to internal corrosion protection. These new biofuels are creating increasing incidents of aggressive microbial-induced corrosion (MIC) of metal components in fueling systems. Fiberglass tanks are not affected to internal corrosion caused by MIC. Neither do they rust externally due to corrosive soil environments.

● In addition to creating corrosive conditions in tanks, new ethanol-blended fuels today also raise questions regarding compatibility of the stored fuel with tank materials. OKet double-wall fiberglass tanks are not only warranted for the full range of ethanol-blended gasoline, they are also UL-tested and UL-listed as compatible with 0-100 percent ethanol storage. This is a very clear difference from steel storage tanks.

(2) Structurally strong
● Integral Rib – Ribs are an important design element of any fiberglass underground tanks. Therefore, the rib form and how it connected to the tank, or tank itself, is an important consideration for designers and customers as they compare products. In our design, with its consistent, high-profile rib structure, ribs are connected directly to the tank shell – not as a secondary step in the process. This increases the overall strength of the tank and results in a structurally superior product.

● Parabeam® 3D Construction – As part of our history of continuous improvement, ZCL and A&Z introduced Parabeam, an unique and patented three-dimensional glass fabric, into its underground tank design. Parabeam enhances overall structural integrity by creating a bond between the primary and secondary tank walls, while providing a free-flowing interstitial space for monitoring.

(3) Buried directly under the lanes
Buried directly under the lanes due to integrally Constructed Ribs with ultra strong and robust.

(4) Full tank monitoring and Compatible with a variety of leak monitoring methods

A&Z's FRP DW Tanks are compatible with a variety of leak monitoring methods and sensors, including liquid media leak detection sensors, or pressure or vacuum sensors, or wall-to-wall sensors. 

● Hydrostatic monitoring system (liquid media leak detection) is an active leak detection system, the interstitial space and a connected reservoir is full of salty water, then Hydrostatic monitoring system can identify the leakage on outer shell or inner shell.

● Pressure or vacuum, Using the annular space formed by the double-layer tank wall gap, we inflate it to form positive pressure, or pump it to form negative pressure. Operates through the vent and monitoring holes. Leak monitoring is based on pressure changes over a certain period of time.

(5) Easy to install

● Pre-cast Concrete Tank Anchors

● Prevent uplift at full flood conditions

● Buried directly under the lanes due to integrally Constructed Ribs with ultra strong and robust

● Lightweight, easy to install, safe and convenient

(6) Maintenance-Free and warranty 30 years with UL certificate

● Many manufacturers of steel tanks have reduced their warranty from 30 years to 10 years, and have emphasized that requires on going maintenance and removal of water bottoms as a condition of warranty coverage. The presence of water in the bottom of fuel tanks is a common condition. Maintenance to frequently remove it can be expensive over both the short-term and long-term life of a tank. A&Z offers a 30-year warranty with no limiting condition regarding water-bottom monitoring and removal.

● Tank Design Code: UL1316. A&Z has passed the strict UL certification, each FRP DW tank produced has a unique certification label issued by UL, which is the same as the production number, traceable to all information on each tank through the UL number. UL certification need to carry out corresponding production management and file management in accordance with UL specifications. A&Z's UL certification system ensures product traceability to true and accurate information.