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TMI Repairs Clarifier Tank in Texas

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“Communication with the crew was great.” – Johnny Reisner, Superintendent for the City of Temple, TX. Reisner also evaluated TMI Coatings, Inc. (TMI) as “excellent” in quality of work, efficiency of crew, service, and cleanliness of site.

TMI was contracted by the City of Temple, Texas to sandblast and recoat a clarifier tank at a water treatment facility. This 102’ diameter clarifier tank provides clean water for the community. After years of use, the tank coating had deteriorated significantly. TMI restored the steel tank to reduce corrosion and protect the metal to increase its lifespan.

Before Image at Water Treatment Facility in Temple, Texas
Before Image
Procedure:

  • High pressured washed the clarifier to remove dirt and contaminants.
  • Covered drain port to ensure no sandblasting media or existing paint chips would enter the drain or the main drive unit/motor.
  • Brush-blasted all metal surfaces below the water line to SSPC-SP7 standards.
  • Collected sand samples & sent them to CCC & Labs for TCLP testing for all eight heavy metals.
  • Welded holes and deep pits in the clarifier bell and rotating drum by patch or surface welding prior to final sandblasting.
  • Sandblasted metal surfaces again to SSPC-SP10 Near White Metal blast in final preparation for painting.
  • Applied a spot prime coat of Tnemec Series N140-1255.
  • Applied multiple coats of Polyamidoamine Epoxy Tnemec Series N140-15BL to all surfaces.

Outcome:

TMI ensured full rehabilitation of this 19’6” tall clarifier tank by including weld repairs into the new tank lining. After a full brush-blast, all eroded areas were repaired by welding steel plates to the areas of concern. Additional sandblasting was performed to attain proper SSPC requirements. A primer coat was applied to ensure the steel was fully restored, and to create a stronger bond between the substrate and the new coating system. The new coatings will provide chemical and abrasion resistance, as well as extend the lifespan of this clarifier tank.

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