Extol of Ohio, Inc., in business since 1985, has specialized in providing quality fabricated insulation systems for the industrial market. We use cellular, rigid materials to supply constant thermal performance plus moisture and corrosion resistance.

EXTOL Advantages

Extol of Ohio fabricated Precision Engineered Head Segments to precisely fit the exact curvature of the surface. The heads are numbered and supplied for installation in courses around a center. Costly field fabrication from flat or curved blocks is eliminated. Installation is completed in minimum time and labor expenses reduced. We produce the largest size insulation pieces available domestically. Installers will have fewer pieces to handle and fewer joints to seal on a cold installation.

Further, Extol of Ohio provides the widest range of sizes in the U.S. We are able to fabricate the smallest to largest sizes head in the fewest pieces possible. A custom factory fabricated pre-formed jacket is available from Extol. Choose Aluminum or PVC to finish your project. These benefits equal to additional savings.

Meeting Demanding Deadlines

Each pre-formed head order is custom fabricated to meet your exact project requirements and schedule. Experience our excellent on-time performance rating!

Installation Practices

A full set of Extol of Ohio Recommended Installation Practices is available to insure that our precision-engineered heads provide the optimum in performance and service life.

Applications for Extol Precision Engineered Head Segments

Cryogenic & Low Temperature Vessels, Tanks & Equipment Medium- & High-Temperature Equipment Hot Oil/Asphalt Storage Tanks Heat Transfer Fluid Systems Hydrocarbon & Sulphur Process Systems Off-shore Platforms Pulp/Paper Mills Cyclic & Dual Temperature Applications Heat Traced Equipment.

Reduced Expenditures

Prevent excessive heat loss or heat gain with Extol of Ohio’s thermally efficient “Precision Engineered Head Segments.”

Call us for help with an Energy Analysis of your specific application. The return on investment information may aid in the justification of expenditures for insulation upgrades to your facility or for your client.

Complete the System

Extol of Ohio provides an “Entire Insulation System” for your application. Complete your vessel head insulation with our pre-formed curved sidewall segments or beveled lags. Each course fits in equal pieces to go around the vessel walls from tangent to tangent. We have recommended insulation specifications which incorporate appropriate accessories, such as; weather and vapor barriers and cladding, mastics, caulkings, joint sealers, bands and springs that are compatible with each insulation product.

Extol Heads Available:

  • 2:1 Elliptical ASME
  • Flanged & Dished
  • Hemispherical
  • Conical
  • Spherical

Fabrication Insulation Materials Available:

  • Cellular Glass – ASTM C552
  • Extruded Polystyrene (XPS) – ASTM C578
  • Perlite – ASTM C610
  • Phenolic – ASTM C1126-96
  • Polyisocyanurate – ASTM C591

Matching Jacket Materials Available:

  • Stainless Steel
  • Aluminum
  • GRP
  • PVC
  • Others Upon Request

Extol Heads in Perlite, Cellular Glass, Extruded Polystrene (XPS), Polyisocyanurate and Phenolic Insulation Materials

The fabrication of each product conforms to the exacting tolerances of ASTM C450 and C585.

Specify your vessel diameter and type of head, the type of material and the thickness of insulation required.

The Extol of Ohio head segments is double contoured to fit the radius of the top of the tank or bottom. Each piece edge is beveled to fit the piece next to it. This assures a close, tight fit.

Most insulation is available in half-inch increment insulation thickness from 1″. Single, double or triple layers of insulation are produced.


Extol Preformed Heads Install as easy as 1,2,3!




Extol Preformed Head Product Literature:

Extol Complete Product Offering Flyer

Extol Contoured Head Systems Ordering Guide

Extol Contoured Heads Typical 2-1 Elliptical Head Diagram

Extol Preformed Head Installation Guide

Extol Preformed Heads and FibaClad Flyer

Extol Preformed Heads Flyer

Extol Preformed Heads Product Data Sheet

Extol Preformed Heads Template Master Tool Product Data Sheet

Extol Preformed Heads With FibaClad™

Extol Vessel Head Measuring Directions