Double Wall Tanks

Double Wall Tanks

Double wall tanks (IMT) provide the best protection against hazardous chemical spills into the environment. The inner tank dome overlaps the outer tank sidewall to help prevent rainwater, snow, and debris from entering the containment basin. Molded-in upper and lower fitting flats are standard. We can customize these tanks with either a top suction or sturdy designed bottom outlet. All double wall tanks are designed with wall thicknesses equal to or greater than that required by ASTM D-1998 standards

Need a large double wall tank?

Assmann’s IMT 8850 will accommodate two truckloads of most chemicals. Some of the unique features of this tank are a standard 24″ hinged manway opening and a secure secondary containment. The secondary containment portion of this tank contains over 110% of the primary tanks capacity. The IMT 8850 can also be equipped with Assmann’s double wall tank accessories.

— System consists of a primary inner tank and a secondary, locked-on outer tank
— Ideal for outdoor storage of chemicals
— Provides individualized secondary containment and prevents cross-contamination of reactive chemicals

Common Use

Double wall tanks provide the best protection against spills! Trust Assmann polyethylene tanks to hold your hazardous materials.

Large Double Wall Tank Specifications

Linear Polyethylene

Model
Number
CAD Capacity
(US
Gals)
Dims
(in)
Weight (lbs)
Linear Polyethylene
Access
Opening
(in)
Pri Sp. Gravity Sec Sp. Gravity
Dia Hgt 1.5 1.9 2.2 1.5 1.9 2.2
IMT150 CAD 1504744N/A6582N/A65827/16
IMT250 CAD 2504761N/A95110N/A951107/16
IMT550 CAD 5506073N/A130151N/A13015916
IMT625 CAD 6254711311715217612716219116
IMT1050 CAD 1050728718520523319124428316
IMT1550 CAD 15507212328335941630939245416
IMT2050 CAD 20507215955169180959674887516
IMT2550 CAD 25509611945757967149963273216
IMT3050 CAD 305096138636806933694879101816
IMT4050 CAD 40509617711781492172811781492172816
IMT5250 CAD 525011915412301558180413421699196816
IMT6550 CAD 655011918620282569297420282569297416
IMT8850 CAD 885014317331123942456532094065470624

Crosslink Polyethylene

Model Number CAD Capacity (US Gallons) Dims (in) Weight (lbs)
Crosslink Polyethylene
Access Opening (in)
Pri Sp. Gravity Sec Sp. Gravity
Dia Hgt 1.5 1.9 2.2 1.5 1.9 2.2
IMT150 CAD 150 47 44 N/A 65 82 N/A 65 82 7/16
IMT250 CAD 250 47 61 N/A 95 110 N/A 95 110 7/16
IMT550 CAD 550 60 73 N/A 130 159 N/A 130 159 16
IMT625 CAD 625 47 113 117 152 176 127 162 191 16
IMT1050 CAD 1050 72 87 185 205 226 176 221 256 16
IMT1550 CAD 1550 72 123 279 380 440 283 359 416 16
IMT2050 CAD 2050 72 159 505 633 738 545 697 799 16
IMT2550 CAD 2550 96 119 600 748 866 457 579 671 16
IMT3050 CAD 3050 96 138 739 944 1093 636 806 933 16
IMT4050 CAD 4050 96 177 1158 1476 1700 1178 1492 1728 16
IMT5250 CAD 5250 119 154 1372 1753 2025 1230 1558 1804 16
IMT6550 CAD 6550 119 186 2000 2570 2960 2028 2569 2974 16
IMT8850 CAD 8850 143 173 2853 3614 4184 2942 3726 4314 24

Small Double Wall Tank Specifications

Model
Number
CAD Capacity
(US
Gals)
Dims
(in)
Weight (lbs) Weight (lbs) Crosslink Polyethylene
Pri Sp.G Sec Sp.G Pri Sp.G Sec Sp.G
Dia Hgt 1.5 1.9 2.2 1.5 1.9 2.2 1.5 1.9 2.2 1.5 1.9 2.2
IMT20 CAD 2026.12521.375N/A17N/AN/A17N/AN/A17N/AN/A17N/A
IMT40 CAD 4026.12533.5N/A26N/AN/A26N/AN/A26N/AN/A26N/A
IMT65 CAD 6526.12547.75N/A36N/AN/A36N/AN/A36N/AN/A36N/A
IMT85 CAD 8534.538.5N/A45N/AN/A45N/AN/A45N/AN/A45N/A
IMT120 CAD 12034.551N/A56N/AN/A56N/AN/A56N/AN/A56N/A
IMT165 CAD 16534.566N/A69N/AN/A69N/AN/A69N/AN/A69N/A
IMT405 CAD 4054776N/A7482N/A7790N/A7477N/A7782

Product Types

Assmann Double Wall Tanks are designed with wall thicknesses equal to or greater than that required by ASTM D-1998 standards. We calculate the wall thickness at the bottom of each tank where hoop stress is greatest, then produce uniform thickness throughout the entire wall.

Specific Gravity Options

Tanks are designed for 1.35, 1.5, 1.9 and 2.2 specific gravity chemicals.

Color Options

Available in natural color, blue, green, yellow or black.

Related Accessories

Preserve the life and efficiency of your tank with accessories customized to your specific tank.

Leak Detection

Need interstitial monitoring? Designed with a NEMA 4X enclosure and suitable for both indoor and outdoor double wall tank applications. This system will alert you to a liquid in your containment.

Heat Tracing & Insulation

Using different heat tracing elements, temperature can be maintained at any point above 50°F.

Reverse Float Level Indicator

This gauge is designed to show liquid level in the tank without having chemical outside the secondary containment.

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Chemical Resistant Data

Maintain safety and efficiency with Assmann’s chemical resistant data chart.