Specification #JI 0304
(Semi-rigid Fiberglass with Galvanized Steel Jacket)

  • The insulation medium is purpose – manufactured semi-rigid premium quality fiberglass wrap with Kraft lining and foil vapor barrier. The fiberglass filaments are laminated parallel to the facings for enhanced flexibility and maximum coverage.
Installed Density:2.5 lbs./ ft³
R. Value:4.17 per inch
Thermal Conductivity:K=0.24 Btu-in/hr-sq ft-ºF @ 75 ºF mean
Standard Thickness:2 inches (R-8 value)
Optional Thickness:3 inches (R-12 value)
Max Thickness:4 inches (R-16 value)
  • After installation, the insulation is clad with a galvanized steel jacket secured with #8 sheet metal screws and painted with 2 to 3 mils of high gloss alkyd enamel. Color is light gray.
  • All tank connections are recessed and the ASME nameplate exposed. All seams are caulked with pigmented silicone for weather protection. Regular inspection and re-sealing as necessary is required.
Jacket Thickness:24 gage (.0239"/.607 mm)
Finish Outside:2 to 3 mils alkyd enamel over galvanizing Galvanized
Finish Inside:Galvanized
  • IMPORTANT: Minor shipping damage is more noticeable on jacketed tanks due to the uniform finish and the nature of the jacket.
    Extra lugs are installed on jacketed vessels for securing the tanks during shipment and they are normally palletized and shipped on a flat bed. Even so, minor cosmetic damage can occur and must be considered normal.