Superior Materials with Proven Performance
GCT utilizes only the leading proprietary coated materials, which provides maximum corrosion resistance and longer tank life.
The materials, design, fabrication, and erection of our bolted steel tanks conform to AWWA D103 latest revision, to the Principles of Standard Specification 12B of the American Petroleum Institute, which are derived from engineering principles, industry experiences, and the aforementioned standards and specifications.
- Steel sheets conform to, or shall be at least equal, to hot-rolled quality per ASTM A1011 Grade 33 with a minimum yield strength of 33,000 psi.
- Steel plates conform to, or at least be equal, to the requirements of ASTM A36 with a minimum yield strength of 36,000 psi.
- Rolled structural shapes shall conform to ASTM A36.
- Galvanized bolts, nuts, and washers used in tank joints meet the minimum requirements of API 12B and Appendix A.
- Poly-capped bolt heads are used for additional corrosion protection.
All bolted connections incorporate a prefabricated EPDM (Buna N) gasket with a 1-3/4” minimum width. A single piece double-punched gasket is used at vertical seams which require two vertical rows of punching. Neoprene backed steel washers are provided to all bolts in contact with the stored liquid. No mastic sealant will be used as the primary method of sealing the tanks.
Note: Use of Buna N for wastewater applications only.
“Gulf Coast Tank & Construction uses only the highest quality of materials, resulting in a storage tank that’s built to last.”
Jamie Reber – President/Owner
- Tank parts are thoroughly washed and rinsed to remove grease, oil, and foreign matter.
- Parts are then immediately over-dried.
- Parts are blasted to SSPC-SP10/NACE (near white blast cleaning) to 1-2 mil profile.
- All parts are coated within 15 minutes after blasting, and no further processing other than coating application shall be done.
Additional corrosion protection is added along with the powder epoxy coating with a Silica & Zirconium (SiZi) liquid seal. The seal is sprayed onto the prepared steel underneath the powder epoxy coating. Lab tests have shown the SiZi seal slows the rate of corrosion and prevents the spread of corrosion. In addition the SiZi seal increases the coating adhesion and bonding to the steel thereby increasing the durability. The SiZi seal can make the difference between a minor cosmetic touch up and a major coating repair.
- Thermally cured epoxy powder (includes underside of the steel floor).
- Electrostatic applications of FDA and NSF approved epoxy, 5.0 mil average dry film thickness.
- Combined with 1-2 mil surface preparation coating, total average interior coating thickness is 6-7 mil.
- Thermally cured epoxy powder.
- First Coat is to be a powder application of epoxy powder, 2 mils average dry film thickness.
- Second coat of epoxy powder, 3 mils dry film thickness.