Pipefitters, Steamfitters, and Insulators: Asbestos and Mesothelioma

Few trades faced higher asbestos exposure than pipefitters, steamfitters, and especially insulators. These workers spent entire careers directly handling asbestos-containing products — insulation jackets, pipe covering, block insulation, spray-on fireproofing, and gaskets. Many worked in power plants, refineries, chemical plants, shipyards, and commercial buildings during the decades when asbestos use was at its peak. Today, the consequences are visible in mesothelioma diagnosis rates that are dramatically higher in these trades than in the general population.

Asbestos-containing products these trades handled daily

• Kaylo (Owens Illinois/Owens Corning) — pipe and block insulation, extremely common through the 1970s
• Unibestos (Pittsburgh Corning) — amosite-based pipe covering, particularly aggressive asbestos variant
• Johns-Manville Thermobestos — pipe and block insulation
• Armstrong LT pipe insulation
• Eagle-Picher Super 66 cement — used as insulation finish
• Garlock gaskets and packing — asbestos-containing sealing products
• Calsilite / calcium silicate pipe covering from multiple manufacturers
• Spray-on fireproofing containing crocidolite or chrysotile

Installation, removal, and repair of any of these generated airborne asbestos fibers. Cutting pipe covering to length with a hand saw, scoring block insulation, or mixing “mud” finishing cement all released fibers into the breathing zone.

Where pipefitters and insulators were most exposed

• Power plants (coal, oil, gas, nuclear steam-generation systems)
• Petroleum refineries and petrochemical plants
• Shipyards (see our shipyard workers page)
• Steel mills and heavy manufacturing
• Commercial buildings — boiler rooms, mechanical rooms, and steam-distribution systems
• Hospitals, schools, and government buildings built before roughly 1980
• Chemical and pharmaceutical plants

Union records as a resource

Pipefitters and insulators were heavily unionized. Union locals (United Association for pipefitters and steamfitters; International Association of Heat and Frost Insulators and Allied Workers for insulators) often maintained detailed work records, job assignments, and employer histories going back decades. If you or a family member belonged to one of these unions, contacting the local for employment verification is often the first step in documenting exposure for a legal claim or VA application.

Legal options

Because pipefitters and insulators handled so many different manufacturers’ products, mesothelioma claims in these trades frequently name multiple defendants. Typical pathways:

• Asbestos bankruptcy trust claims — dozens of manufacturers’ trusts continue to pay claims today
• Personal injury lawsuits against solvent defendants
• Workers’ compensation for employees of still-operating contractors
• VA disability for those whose exposure occurred during military service

Time limits are short. This is not legal advice. Consult a licensed attorney.

Get answers about your next steps

If you or a loved one has been diagnosed with mesothelioma, you may have questions about treatment, support, or legal options. MesoCare.org compiles information from federal health agencies and established cancer centers so families have a starting point — we are not a medical provider or a law firm. Start with these resources:

• Understanding mesothelioma — symptoms, types, diagnosis
• Treatment options — surgery, chemotherapy, immunotherapy, clinical trials
• Support resources — financial assistance, caregiver help, mental health
• Legal information — trust funds, lawsuits, VA disability, workers’ comp

MesoCare.org is sponsored by Danziger & De Llano, LLP and is informational only. Nothing on this page is medical or legal advice. Speak with your clinical team about treatment and a licensed attorney about legal questions.