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Ecodur 201: Vac Truck Tank Coating (EPC)

Ecodur_Vac_Truck (sm)

Haulage trucks are as vital to the oil and gas industry as red blood corpuscles are to the human body. They can haul efficiently on highways, but, most importantly, they can access the thousands of miles of rough roads encountered close to many production sites.

The industry has benefited from the recent price improvement with increased investment by some production companies, particularly those operating in the Permian Basin in Texas and New Mexico. In January 2016, oil dipped below $30 and now is hovering just above $50. Now haulage activities increasing attention has returned to maintenance regimes.

Problem
This case study concerns a 100-barrel production water truck in Grand Junction, Colorado, that had been protected with a conventional epoxy coating. The harsh driving conditions imposed on the truck had caused the original coating to fail.

Vac Truck_before_coating 2 (sm)

Conventional epoxies generally have limited or no retained flexibility so vibrations and a torqueing can rapidly lead to micro-cracking which allows corrosive chemicals contained in the production water to directly attack the tank’s interior. One of the serious corrosive chemicals is sulfuric acid produced from the sulfur content.

Particularly with internal coating projects, there is a serious concern about hazardous vapors so the demand is for zero Volatile Organic Compounds (VOCs). Of additional concern are solvents. Not only are they hazardous to health, but they are also very expensive to dispose of under the regulations governing them.

The winter cold temperatures did not present a problem because Ecodur has exceptional low temperature application ability far in excess of many conventional coatings.

Vac Truck_before_coating (sm)

Solution
Aside from Ecodur having been used in hundreds of oil tanks, it has an extensive antecedent history of use on large passenger ferry decks where steel decking flexes and contracts and expands. Not only has it been proven to retain its adhesion under the harshest conditions, but also it is totally resistant to salt and a very wide array of chemicals found in production from fracking.
Ecodur does not have any solvents in content, application, or are they required for clean-up. In this case, the applicator, Elite Protective Coatings, sprayed on the Ecodur onto a clean, dry surface to a depth of 30 mils. With no VOCs, the sprayer only required standard protective clothing and equipment, but the reader is advised this was after an inspection to confirm there was adequate fresh air flow.

Ecodur being comprised of vegetable oil and naturally occurring gypsum, is a non-toxic coating and is rated for use in contact with potable water. It has a very mild odor that is often described as quite pleasant, so other workers can carry on in the same building but must stay well clear of any spraying as airborne particles can adhere to human tissue.

Vac Tank Coating After

Application Results
As can be seen from the photos, the quality of the spray finish was excellent. Using pressure spraying allows the coating to penetrate into the tiniest anomalies such as cracks and gaps in welds and behind bolt heads. Full cure was achieved within 24 hours at which time the truck was released for full usage. The client reported complete satisfaction with the results.