|Exceed ASTM D-1998-97 design standards
The American Society for Testing and Materials (ASTM) committee formulated design standard for all vertical polyethylene
storage poly tanks to assure consistency and safety in poly tank designs and manufacturing. All Sierra Sales
vertical poly tanks are designed to exceed ASTM standard requirements. As a result, Sierra Sales poly tank
walls are thicker in critical hoop stress areas.
|Available with IBC 2006 seismic and 150 mph wind restraint tie-down
Most Sierra Sales verticals incorporate molded-in tie-down lugs, which are designed to interface with a cable tie-down
system. Many poly tank designs have the ability to be modified for even more stringent specification standards
Material options for a diverse range of application requirements
Sierra Sales has the ability to cater a poly tank's material construction to an application's specific requirements.
We offer the following resin options:
- High-density linear polyethylene (HDLPE)* in black & natural white color
- Cross-linked, high-density polyethylene (XLPE) in black & natural white color
- Opaque white -- "black-out" resin
|Specific gravity rating's are based on the industry's most severe calculation
Sierra Sales utilizes a 600 psi hoop stress measured from the top of the poly tanks dome to calculate our posted
specific gravity for every vertical poly tank we manufacture. As a result, Sierra Sales's specific gravity
ratings deliver a stronger poly tank with a higher safety factor. Standard specific gravity choices are 1.5
and 1.9, other ratings are available upon request. Specific gravity reflects material weight. For example,
1.5 S.G.=12 lb/gallon, and 1.9 S.G.=15.2 lb/gallon.
|* Complies with U.S. Food and Drug Administration Regulation 177.1520.
|| All poly materials are UV stabilized for long-terrm outdoor service.