The quality of the build was excellent

“The tank you built for us in 2002, has absolutely no wear on the Powder Coating or any other feature of the tank. The quality of the build was excellent, we automatically go to Superior for our tank needs as it is a known quantity.”

Robert S.

Excellent Product & Service

“Excellent product and very good support service.”

Elson G.

Superior was one of my better decisions

I can tell you that I was extremely happy with the professionalism of the entire process from design to install. Superior was one of my better decisions while running Saltwater Disposal of North Dakota

David K.

Excellent Work

“Just wanted to let you know that your work crew was excellent. Thanks for your professionalism.”

Jack C.

Pleased With Quality & Service

“We were happy with the quality of the product as well as the follow up service. The crew was efficient and did a great job.”

William A.

Fantastic Bolted Steel Tank!

“Absolutely fantastic tank!  Your crew was a very impressive team; the tank went up much quicker than we had expected.”

Ed C.

Delivery & Installation

“I have purchased tanks from other companies, but none are delivered and installed with less problems than Superior Tank.”

Donald S.


“Please let your crew know that I appreciate their work and efforts to get this tank done. GOOD JOB!!”

Michael B.

Have Always Used Superior

Have always used Superior and don’t know any water supply company that doesn’t use Superior.

Mark C.

I only deal with Superior

“I DO NOT deal with any other bolted tank company, period. I deal only with Superior because of Huel, and he makes sure I get the best product that Superior has to offer and Huel stands behind what he puts his name on.”

John G.

Customer For Over 30 Years

“We have done business with Superior Tank for over 30 years and plan on doing more business.”

Johnny G.

Superior Customer Service

“Superior Tank took care of us in our time of need and had the best price around. Mr. Huel took very good care of us from start to finish as did the crew putting the tank up. Superior Tank was also recommended to us by a neighboring water company who was very pleased with their work as well.  Thank you Superior Tank .”

Quinn A.

Satisfied Customer

“Very good and timely response.”

Steve M.

A Historic Moment

“Today  water began flowing to our customers. A bit of clean-up, replace the Brown’s gate, and we will be finished. One bit of history I remember tells me that this is the first project of this magnitude since the Empire State Building to finish ahead of schedule and (slightly) below budget. Thank you for your support.”

Peter S.



Certified Laboratory Testing


Proven Results for our Factory Powder Coating!

All Superior bolted steel tanks receive final coating before they leave the factory and therefore our coatings are very consistent coating and can easily be tested for durability. Conversely, testing of coatings applied to steel tanks in the field is considerably more difficult as the final coating can be affected by site conditions.
To illustrate the superior resilience of our coatings, the powder coating applied to our bolted steel tanks has been thoroughly tested by an independent technical laboratory. The lab selected specializes in testing for the aerospace, medical device, automotive, composites, metals, electronic devices and composites industries. Testing equipment is calibrated and inspected in accordance with ANSI/NCSL procedures. In addition, multiple steel samples with the powder coating were provided to the lab to improve testing validity.
The steel panels with the powder coating were subjected to a variety of industry recognized tests. To ensure the powder coating will not flake off the tank and expose the bare steel, a coating adhesion test was performed. Also, as all steel tanks expand and contract with temperature changes, the flexibility of the powder coating was measured to make certain the coating does not crack. As steel tanks are sometimes struck by rocks or tools and the powder coating needs to remain intact and uncompromised. The impact test illustrates the amount of force the powder coating can withstand. Our bolted steel tanks are used in a wide variety of environments such as coastal areas and are used to storage various liquids including corrosive liquids. The Salt Spray test simulates harsh conditions and confirms our tanks will perform well and the steel will not corrode. As shown in the chart below, the powder coating provided outstanding results:

Powder Coating Test Results

Coating and Hardware Test Sample with the Results Cross Section

Powder Coating Formula: TGIC for Exterior Use

Test name Standard Conditions Results
Adhesion ASTM D-3359-97   Rating = 5B (no coating removed)
Flexibility, Mandrel ASTM D522-93a 1/8 in. dia no fracture
Impact resistance ASTM D2794-93-Gardner 100 / 80 in/lbs Withstands impact
Pencil Hardness ASTM D3363-92a   2H
Salt Spray Resistance ASTM B-117-97 1000 hours passed

Powder Coating Formula: Epoxy For Interior Use

Test name Standard Conditions Results
Abrasion resistance ASTM D-4060-Modified-Taber CS-10 wheel, 1kg weight for 1000 cycles Coating loss only 24-45 mg
Adhesion ASTM D-3359-Method B Pressure sensitive tape used between 1/8” cross-hatch scribes Rating=5B (no coating removed)
Flexibility, Mandrel ASTM D522-93a 1/8 in. dia no fracture
Impact resistance ASTM D-2794-Modified 160” lbs of direct & reverse impact Withstands impact
Pencil Hardness ASTM D3363-92a   6H
Salt Spray Resistance ASTM B-117 95˚F, 100% relative humidity, 5% salt fog -1000 hours no undercutting displayed
NSF 61     Qualified

Chemical Resistance – Epoxy

Chemical Concentration Duration Results
Chlorine 1% 12 months No effect
Anti-freeze 50% ethylene glycol 12 months No effect
Sulfuric Acid 40% 12 months No effect


SiZr Seal

In addition to testing of the powder coating we use on our bolted steel tanks, we also had our SiZr seal tested to verify the effectiveness of the seal:

Test name Standard Conditions Results
Salt Spray Resistance ASTM B-117-97 1000 hours Untreated steel panel: 3.2mm avg creepage
      Treated steel panel: 0.0mm avg creepage


Customers can rest assured the factory powder coating we use on all of our bolted steel tanks has been proven to withstand the toughest conditions!