Asbestos Pipe Insulation: Exposure & Trust Fund Compensation
Asbestos pipe insulation was the most-installed asbestos product of the 20th century — wrapping virtually every steam pipe, hot water line, and high-temperature process line in U.S. ships, factories, refineries, power plants, and commercial buildings from 1940 through 1985.
Were you exposed to pipe insulation?
What is asbestos pipe insulation?
Asbestos pipe insulation was a high-temperature thermal covering applied to steam, hot water, and process piping systems. The dominant types were calcium silicate insulation (Kaylo, Unibestos), block insulation, and asbestos-cloth wrappings. Pipe insulation was specified for virtually every U.S. industrial steam system, every Navy ship, every commercial building with hot-water heat, and every refinery, power plant, and chemical facility from approximately 1940 through 1985.
Different brand names dominated different markets and eras: Kaylo (Owens-Illinois 1948-1958, then Owens Corning 1958-1972), Unibestos (Pittsburgh Corning 1962-1972), Manville pipe insulation (broadest era coverage), Eagle-Picher One-Cote, plus contractor-installed products from Plant Insulation, Western MacArthur, J.T. Thorpe, and Thorpe Insulation in the western U.S.
Manufacturers and bankruptcy trusts that cover this product
The following asbestos manufacturers produced pipe insulation products during the asbestos era and now have bankruptcy trusts that compensate exposed claimants:
Exposure mechanism
Pipe insulation generated asbestos exposure at every stage of its life cycle:
- Manufacturing — Kaylo, Unibestos, and similar products were manufactured from raw asbestos with significant fiber release in production facilities
- Installation — insulators cut and fitted the products to specific pipe sizes, generating dust during sawing and trimming
- Use phase — aging insulation became friable over decades, releasing fibers during normal building operations
- Maintenance and repair — pipe modifications required cutting through existing insulation, generating large dust clouds
- Tear-out and demolition — the highest-exposure activity; removing aged asbestos pipe insulation during renovations or demolitions
- Abatement — the 1980s asbestos abatement era exposed contractors to high fiber concentrations during removal projects
Common occupations exposed to pipe insulation
- Insulators
- Pipefitters / steamfitters
- Boilermakers
- Navy veterans (engineering rates)
- Civilian shipyard workers
- Refinery workers
- Power plant workers
Frequently asked questions
What's the difference between Kaylo and Unibestos?
Both were brand-name asbestos pipe insulation products of the same era. Kaylo (Owens-Illinois then Owens Corning) used chrysotile asbestos. Unibestos (Pittsburgh Corning) used amosite asbestos — a more carcinogenic variety. Both were installed extensively on Navy ships and in industrial facilities. Most workers exposed to one were also exposed to the other.
My building still has asbestos pipe insulation. Am I at risk?
Undisturbed asbestos pipe insulation in good condition poses minimal risk. Risk arises when the insulation is damaged, friable, or being removed/disturbed. If you live or work in a building with intact asbestos pipe insulation, exposure is generally low. EPA does not recommend removal of intact asbestos materials.
Did pipe insulation continue to contain asbestos after 1985?
Most U.S. manufacturers stopped producing asbestos pipe insulation by approximately 1980-1985. After that date, alternative materials (calcium silicate without asbestos, mineral wool, fiberglass-based products) became standard. Buildings and facilities still contain installed legacy asbestos products from before 1985, but new installations after that date are typically asbestos-free.
Can I file with multiple pipe insulation trusts?
Yes — most claimants do. Workers exposed to pipe insulation typically encountered products from multiple manufacturers throughout their careers. Filing with all applicable trusts (Manville, Owens Corning/Fibreboard, Owens-Illinois, Pittsburgh Corning, Eagle-Picher, UNR, Keene) is standard practice.
Did Navy pipe insulation differ from civilian pipe insulation?
The same products were used in both Navy and civilian applications, but Navy specifications often called for higher-performance variants (heavier asbestos content, thicker installation) due to the high-temperature steam systems aboard ships. Navy veterans and civilian shipyard workers have particularly strong exposure documentation paths to pipe insulation trust claims.
Were you exposed to asbestos pipe insulation?
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