Glass Furnaces & Glass-Plant Equipment — Asbestos Exposure Crosswalk
What This Equipment Is
A glass-melting furnace continuously converts batched raw materials (silica sand, soda ash, limestone, cullet) into molten glass at temperatures of 2,700–3,000°F. Major furnace types include:
- Regenerative end-port furnaces — flat glass and large container production
- Regenerative side-port furnaces — container glass production
- Recuperative furnaces — smaller production, fiberglass, specialty
- Day-tank and pot furnaces — small specialty / art glass production
- Forehearth and feeder systems — glass-delivery channels to forming equipment
Glass-plant operations also include:
- Batch-house mixers and conveyors (raw-material handling)
- Forming equipment — float-glass tin baths, container-forming machines, fiberglass-spinning machines
- Annealing lehrs — controlled-cool ovens for stress relief
- Cutting and finishing lines
Every section runs hot and is refractory-lined, externally insulated, and surrounded by extensive support equipment.
Asbestos Products Historically Used Around Glass Plants
| Product Category | Where on the Plant | Notes |
|---|---|---|
| Furnace refractory | Melter, refiner, regenerator chambers | See Refractory Brick, Refractory Mortar |
| Block insulation | Furnace shell exterior, throat / channel areas | Calcium silicate, magnesia |
| Pipe covering | Combustion-air, fuel, glass-pull-related piping | Magnesia, calcium silicate |
| Forehearth insulation | Glass-delivery channels | Specialty refractory |
| Asbestos cloth shielding | Worker-zone heat shielding | See Asbestos Cloth, Foundry Aprons |
| Gaskets | All flanged piping | Asbestos sheet gasket material |
Why Glass-Furnace Work Was a Heavy Asbestos Exposure
Glass-furnace rebuilds — performed every 8–12 years for a typical container or flat-glass furnace — are massive multi-week capital outages employing dozens of refractory masons. Tear-out of the spent regenerator brick alone is one of the dustiest operations in industrial refractory work; the regenerator structure stands stories tall and is broken out brick by brick.
Routine maintenance — patching refractory between major outages, replacing throat / channel components, rebuilding feeders — drives ongoing asbestos disturbance.
Manufacturers Named in Glass-Plant-Equipment Litigation
- PPG Industries — flat-glass plant operator, also glass-equipment OEM
- Owens-Illinois — container-glass plants
- Owens-Corning — fiberglass plants
- Libbey Glass — container-glass plants
- A.P. Green Refractories — glass-furnace refractory
- Harbison-Walker Refractories — refractory
- North American Refractories (NARCO) — refractory
- General Refractories — refractory
- Johns-Manville — block insulation, pipe covering, asbestos cloth
Documented Product References
Images sourced from publicly available product-identification reference materials. Inclusion does not constitute a finding of liability against any company.
Trust Funds That May Apply
- A.P. Green Industries Asbestos PI Settlement Trust
- Harbison-Walker Refractories / RHI Asbestos PI Trust
- North American Refractories Company (NARCO) Asbestos PI Settlement Trust
- General Refractories Asbestos PI Trust
- Manville Personal Injury Settlement Trust
- Owens-Corning / Fibreboard Asbestos PI Trust
Trades Most Exposed at Glass-Plant Work
Refractory masons (primary exposed trade), glass-furnace operators and gatherers, batch-house operators, pipefitters, insulators (Heat & Frost), contract furnace-rebuild crews, forming-machine mechanics.
Cross-References
- See companion pages: Industrial Furnaces, Refractory Brick, Refractory Mortar, Cement Plant Equipment, Foundry Sand, Asbestos Cloth
Compiled from publicly filed asbestos litigation, EPA / OSHA / NIOSH records on glass-industry exposure, and industry-publication histories. Product 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. Not legal advice; consult a licensed attorney about your specific situation.