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Geo-Form EPDM Rubber Alloy vs. HDPE Geomembrane Lining
In the absence of a better option, HDPE has been specified in applications where “high” chemical resistance is not required. Now, with many years of proven performance, Geo-Form offers an alternate solution. The chart below shows the advantages of EPDM Rubber Alloy lining when compared to HDPE.
"HDPE provides good chemical resistance and toughness, but is a semi-crystalline material with a relatively low ductility that has difficulties conforming to uneven subgrades and movement. Thicker HDPE liners are also more rigid and difficult to handle and weld."
Higher Ground Consulting Report – “Performance Analysis of Engineered Liner Systems Used to Store Saline Fluids in the Canadian Oil and Gas Industry: Physical and Environmental Influences” prepared for Petroleum Technology Alliance Canada
| Characteristics | Geo-Form | HDPE | |
|---|---|---|---|
| DUCTILE | Stretch and mold to irregular sub-grade Conform to sub-grade settlement without rupture | ||
| SUPPLE | Soft and flexible, bends easily without fracture Adaptable or responsive to new situations | ||
| HEAVY | Specific gravity greater than 1.0 Will not float or require ballast | ||
| CORE THICKNESS | Same as overall thickness No surface profiles to protect from crazing |
| Installation Considerations | Geo-Form | HPDE |
|---|---|---|
| Minimal subgrade preparation possible | ||
| Tolerant of limited rocks & protrusions | ||
| Foot traffic & light rubber-tired vehicles okay | ||
| Secure welds at low temperatures (10°F) | ||
| Welds may be quality inspected visually | ||
| Minimum training of welder operators | ||
| May be installed by local workers w/o factory training |
| Concerns of Failure Caused By: | Geo-Form | HPDE |
|---|---|---|
| Stress cracking and crazing | ||
| Weld failures caused by cold shock | ||
| Improper tension during placement | ||
| Worker handling and foot traffic damage | ||
| Anchor pull out & splice failure due to shrinking | ||
| Uplift by wind in reservoirs | ||
| Hippos and whales in reservoirs | ||
| Damage caused by adding ballast |
Is the Geo-Form Geomembrane Right for Your Project?
There are many variables to consider when determining if a lining is resistant to a chemical, solvent or petroleum product; life expectancy, temperatures and the level of concentration. Please contact us with the specific chemical resistance requirements of the project and we will advise if Geo-Form should be considered.
All Geo-Form Geomembrane Products are Custom Made and Built to Last
Applications
Because Geo-Form is made of weather and U/V resistant polymers, it's an ideal solution for any lining project where long life expectancy is required.
All Our Liners are Made 100% in the U.S.A.
Our Midwest Manufacturing Facility is ISO Certified
We Serve Clients All Over the World