Industrial Boilers — Asbestos Exposure Crosswalk
What This Equipment Is
An industrial boiler is a large pressurized vessel that generates high-volume steam or hot water for commercial and industrial use. Unlike a residential or small commercial boiler, an industrial boiler operates continuously at high pressure and temperature, often producing tens of thousands of pounds of steam per hour. They are the heart of:
- Electric utility power plants — coal-fired, oil-fired, natural-gas, and nuclear steam supply
- Petroleum refineries — process steam and electric cogeneration
- Paper and pulp mills — recovery boilers (chemical recovery) and power boilers
- Steel mills — power generation and process heat
- Chemical plants and refineries — process steam and feedwater heating
- Breweries, food processing, and distilleries — process heat, sterilization, fermentation
- Large hospitals, universities, military bases — central plant steam distribution
- U.S. Navy vessels — propulsion and auxiliary steam (see Naval Boiler Products)
From roughly 1900 through the 1980s, industrial boilers were specified, installed, and maintained using asbestos-containing materials at virtually every component touchpoint outside the pressure vessel itself.
Specific Boiler Types
This page is the umbrella reference. For more detail on specific boiler classes:
- Boilers — generic industrial boilers crosswalk
- Recovery Boilers — paper mill chemical recovery
- Naval Boiler Products — U.S. Navy steam plants
- Feedwater Heaters — boiler-feedwater conditioning
- Steam Turbines — steam consumers downstream of boilers
- Steam Traps — condensate management on boiler steam systems
Asbestos Products Historically Used at Industrial Boilers
| Product Category | Where Used | Notes |
|---|---|---|
| Block insulation | Boiler shell, drum, breeching | Calcium silicate or 85% magnesia block |
| Pipe covering | Main steam lines, feedwater, blowdown | Magnesia, calcium silicate, Unibestos |
| Insulating cement | Joints, fittings, irregular shapes | Mixed dry, hand-applied — very dusty |
| Refractory brick & block | Furnace lining, combustion chamber | High-temp duty, some grades asbestos-bonded |
| Gaskets | Manway covers, handhole covers, flanges | Sheet, spiral wound, ring |
| Packing | Valve stems, boiler-feed pump shafts | Braided asbestos rope |
| Asbestos cloth | Tape wrap on bare piping, fire blankets | Outer protection layer |
| Spray fireproofing | Structural steel surrounding the boiler | Tank-spray, Monokote variants |
| Boiler jackets and cladding | Outer wrap | Asbestos millboard, transite panels |
Manufacturers Named in Industrial-Boiler Litigation
Public asbestos litigation records identify these companies among the manufacturers and suppliers most frequently named in industrial-boiler cases:
Boiler manufacturers (named for installation, maintenance, and supplied-with-asbestos claims):
- Babcock & Wilcox
- Foster Wheeler
- Combustion Engineering
- Riley Stoker
- Cleaver-Brooks
- Erie City Iron Works
- Crane Co.
Insulation and refractory manufacturers:
- Johns-Manville — block insulation, pipe covering, refractory
- Owens-Corning / Fibreboard — calcium silicate pipe covering
- Pittsburgh Corning — Unibestos pipe covering
- Eagle-Picher — block insulation
- Armstrong World Industries — calcium silicate insulation
- W.R. Grace — fireproofing and insulating products
- Harbison-Walker — refractory products
Gaskets and packing:
- Garlock Sealing Technologies — sheet gaskets, braided packing
- John Crane Inc. — gaskets and packing
- Anchor Packing
Trust Funds That May Apply
- Babcock & Wilcox Company Asbestos PI Trust
- Combustion Engineering 524(g) Asbestos PI Trust
- Manville Personal Injury Settlement Trust
- Owens-Corning / Fibreboard Asbestos Personal Injury Trust
- Pittsburgh Corning Corporation Asbestos PI Trust
- Eagle-Picher Industries Personal Injury Settlement Trust
- Armstrong World Industries Asbestos PI Settlement Trust
- W.R. Grace Asbestos PI Settlement Trust
See full trust-fund directory →
Trades Most Exposed at Industrial Boilers
- Boilermakers — primary tradesmen for boiler installation, tear-down, and refractory work
- Heat & Frost Insulators (Local #1) — installation and removal of block insulation and pipe covering
- Pipefitters & Steamfitters — steam line and feedwater piping fitting and insulation
- Millwrights — mechanical installation and alignment of boiler accessories
- Maintenance Mechanics — ongoing repair and outage work
- Electricians — control and instrumentation work in boiler rooms
- Laborers — refractory tear-out, insulation removal, ash handling
- Sheet Metal Workers — jacketing, breeching, and ductwork
Outage and overhaul windows — typically every 12 to 36 months — historically produced the highest concentrations of airborne asbestos fiber because of the simultaneous tear-out activities.
Jobsites in the Network Documenting Industrial Boilers
- Anheuser-Busch Brewery — St. Louis, Missouri — industrial boilers serving the brewery’s power and process steam
- LG&E Trimble County Generating Station — Bedford, Kentucky — coal-fired utility boilers
- Missouri power generation facilities — multiple boiler-equipped sites
- Industrial jobsites across the state archives — see the per-state archive for facility-specific boiler documentation
Compiled from publicly filed asbestos litigation records, EPA NESHAP filings, state-DNR records, and industry-publication histories. Product identifications and company references reflect what has been alleged or documented in publicly filed litigation. This page does not constitute a finding of liability against any company. This information is not legal advice; consult a licensed attorney about your specific situation.