SAFE-Surge® Manway Cover

Venting: SAFE-Surge® manway cover is recommended on pneumatically loaded systems to support tank longevity.
Through a combination of innovative features, Poly Processing creates the ideal system for sulfuric acid storage. With their robust load tolerance, crosslinked polyethylene tanks can more than handle the chemical’s heavy weight. The molecular bonding of XLPE and tank wall thickness is particularly important in the bottom third of the tank, where high levels of load are concentrated.
You can use any Poly Processing tank less than 11,000 gallons and under 15 feet tall to store sulfuric acid. This includes Sloped IMFO®, IMFO®, Vertical, and SAFE-Tank® Systems.
If secondary containment is not present, the Poly Processing SAFE-Tank® is a smart choice. Along with containing the chemical from its surrounding environment, this double-walled tank greatly lowers the risk for hazardous contact of sulfuric acid with water. SAFE-Tank® systems are designed with OR-1000™.
If secondary containment* is present, the IMFO® tank is recommended. With the use of an IMFO® system instead of mechanical fittings, the tank’s structural integrity is maximized. Combine this tank design with the OR-1000™ system, and oxidation is reduced dramatically.
All of these features lead to a safer tank – designed to reduce safety risks and improve the longevity of the system.
For additional information on storing sulfuric acid, including recommended storage tanks and components, download our Sulfuric Acid Position Statement below.
Sulfuric acid is used in a huge array of industrial applications, from water and wastewater treatment to the manufacture of chemicals, fertilizer and car batteries.
This highly exothermic acid presents serious storage challenges:
Sulfuric acid is an extremely heavy chemical that will test the mechanical integrity of any material.
The addition of water to concentrated sulfuric acid leads to the dispersal of a sulfuric acid aerosol – or worse yet, an explosion.
If sulfuric acid is spilled on metals, it can create highly flammable hydrogen gas.
Skin and other bodily burns from sulfuric acid are potentially more serious than burns from other strong acids. Sulfuric acid dehydrates whatever it touches, and the heat caused by that reaction with water can create secondary thermal damage.
Poly Processing’s tanks and fittings can be combined specifically to contain sulfuric acid, reducing the risks presented by this highly acidic chemical.
Looking for more information on sulfuric acid storage? Read our complete storage guide.
Chemical | Resin Type | Specific Gravity Rating | Fitting Material | Gasket Material | Bolt Material |
---|---|---|---|---|---|
Sulfuric Acid ≥ 93% | XLPE with OR-1000™ | 2.2 | PVC | Viton® | 316SS |
Sulfuric Acid 80%-92% | XLPE with OR-1000™ | 2.2 | PVC | Viton® | C-276 |
Sulfuric Acid < 80% | XLPE with OR-1000™ | 1.9 | PVC | Viton® | C-276 |
* Containment tank is required with this chemical in all applications.
High-density crosslinked polyethylene (XLPE) accommodates the heavy weight of sulfuric acid.
OR-1000™ bonds the XLPE with an antioxidant inner surface, minimizing oxidation, reducing the potential for fault and maximizing life span.
SAFE-Tank® design creates a "tank within a tank," ensuring that water will not enter the containment area. (Recommended where secondary containment is not available.)
Integrally Molded Flanged Outlet (IMFO®) tank is molded as a single unit. This maintains hoop stress rating, adding to the strength of the tank. (Recommended for situations with existing secondary containment.)
B.O.S.S. fitting® provides bolted one-piece sure-seal design, limiting the seal point to a single gasket for major leak protection.
Venting: SAFE-Surge® manway cover is recommended on pneumatically loaded systems to support tank longevity.
Fittings: Recommend bellows transition fitting for bottom sidewall discharge.
Fittings: B.O.S.S. fitting® also recommended to prevent leaks.
NOTE: For concentrations less than 93%, DO NOT use stainless steel.
Plumbing: Reverse float gauge recommended to ensure proper tank leveling.
Tank
11/15 Rule - Less Than 11,000 Gallons and Less Than 15' Tall:
Secondary Containment:
Fittings
Plumbing to the tank
Expansion joints must meet the following minimum requirements:
Axial Compression ≥ 0.67˝
Axial Extension ≥ 0.67˝
Lateral Deflection ≥ 0.51
Angular Deflection ≥ 14°
Torsional Rotation ≥ 4°
Temperature
Product should not exceed 100°F at delivery or during storage to maintain ASTM D1998 design parameters.
Venting
Foundation and restraints
Lid
SAFE-Surge® manway cover for pneumatically loaded tanks; bolted manway cover for all other applications
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