Koppers Company and Asbestos-Containing Products
Koppers Company was a major American industrial manufacturer with deep roots in the production of coal tar chemicals, carbon products, and industrial furnace systems. For much of the twentieth century, Koppers supplied critical materials and equipment to steel mills, coke plants, aluminum smelters, chemical processing facilities, and other heavy industrial operations across the United States. According to asbestos litigation records, the company’s industrial products and furnace systems incorporated asbestos-containing materials throughout much of the mid-twentieth century, exposing generations of industrial workers to hazardous asbestos fibers.
Company History
Koppers Company grew from its origins in coal tar chemistry into one of the most significant industrial suppliers in the United States. Operating primarily out of Pittsburgh, Pennsylvania — a city synonymous with American steel and heavy industry — Koppers developed an extensive product line that included coke oven equipment, tar distillation systems, chemical processing technology, and engineered industrial furnaces. The company served as a contractor and supplier to some of the largest industrial operations in North America, including integrated steel mills, aluminum reduction plants, and chemical processing facilities.
Throughout the post-World War II industrial expansion, Koppers was closely tied to the growth of American manufacturing infrastructure. The company’s engineering divisions designed, fabricated, and installed complex industrial systems, including byproduct coke ovens and related high-temperature processing equipment. This type of heavy industrial work placed Koppers personnel and the tradespeople who worked alongside them in direct and prolonged contact with the insulation materials and refractory products commonly used in high-heat applications during this era — many of which contained asbestos.
Koppers is understood to have substantially curtailed the use of asbestos-containing materials in its products and operations by the early 1980s, consistent with broader regulatory changes and evolving occupational health standards during that period.
Asbestos-Containing Products
According to asbestos litigation records, Koppers Company manufactured, supplied, or incorporated asbestos-containing materials into several categories of industrial products and systems, with the primary focus on industrial furnaces and related high-temperature processing equipment.
Coke Oven and Byproduct Plant Systems
Plaintiffs alleged that Koppers designed and supplied coke oven batteries and byproduct recovery systems that incorporated asbestos-containing insulation, gaskets, and refractory materials. Coke ovens operate at extremely high temperatures and require extensive thermal insulation to function efficiently. Court filings document that asbestos insulation was a standard component in this type of equipment for much of the mid-twentieth century, used to wrap piping, doors, expansion joints, and structural elements of coke oven batteries.
Industrial Furnace Equipment
Court filings document allegations that Koppers industrial furnace systems — including those used in metallurgical processing and chemical manufacturing — were supplied with or specified asbestos-containing insulating materials. These included block and blanket insulation, rope packing, and gasket materials used in high-temperature joints, flanges, and access points within furnace assemblies. Plaintiffs alleged that these materials were integral to the equipment as designed and supplied by Koppers.
Tar and Chemical Processing Equipment
According to asbestos litigation records, Koppers’ coal tar distillation and chemical processing systems also incorporated asbestos-containing components. Piping systems, heat exchangers, and associated mechanical assemblies in tar processing operations were alleged to have included asbestos packing, gaskets, and insulation products.
Refractory and Insulating Materials
Plaintiffs in litigation have alleged that Koppers specified or supplied refractory products containing asbestos for use in the lining and maintenance of industrial furnaces and coke ovens. Refractory materials — designed to resist extreme heat — were frequently manufactured with asbestos content during this period, and their installation, repair, and removal generated substantial quantities of airborne asbestos fiber.
It should be noted that the specific product formulations and the precise asbestos content of individual Koppers products have been subject to dispute in litigation. The allegations described here reflect claims made in asbestos lawsuits and should not be interpreted as established findings of liability.
Occupational Exposure
Workers across a wide range of trades and industrial roles reported potential asbestos exposure associated with Koppers products and job sites, according to asbestos litigation records. The nature of Koppers’ business — supplying and installing complex industrial systems in steel mills, coke plants, and chemical facilities — meant that exposure was not limited to Koppers employees alone. Contractors, subcontractors, and facility maintenance workers all potentially encountered asbestos-containing materials in these environments.
Coke Plant and Steel Mill Workers
Employees at integrated steel facilities and standalone coke plants were among those most frequently identified in litigation as having worked with or around Koppers-supplied equipment. Plaintiffs alleged that routine maintenance of coke oven systems — including the replacement of door seals, the repair of insulated piping, and the servicing of byproduct recovery equipment — disturbed asbestos-containing materials and released fibers into the breathing zone of workers.
Insulators and Pipe Coverers
Court filings document that insulation tradespeople who worked in facilities using Koppers industrial equipment were frequently exposed to asbestos during the installation and removal of thermal insulation on piping, furnaces, and associated equipment. Insulators often worked in confined or poorly ventilated areas of industrial plants, where airborne fiber concentrations could accumulate to dangerous levels.
Millwrights and Maintenance Mechanics
Plaintiffs alleged that millwrights and mechanical maintenance personnel who serviced Koppers furnace and coke oven systems regularly disturbed asbestos-containing gaskets, packing materials, and insulation during routine repair and overhaul work. The cutting, scraping, and removal of these materials — often performed without respiratory protection — was identified as a significant source of occupational asbestos exposure.
Boilermakers and Ironworkers
Workers involved in the construction, modification, and repair of Koppers industrial systems — including boilermakers who worked on high-temperature vessels and ironworkers involved in structural installation — were also identified in litigation as having potential exposure histories connected to Koppers products and job sites.
Engineers and Supervisory Personnel
According to asbestos litigation records, even supervisory and engineering personnel who worked in and around industrial facilities using Koppers equipment were potentially exposed to asbestos fibers released during nearby maintenance or construction activities. Bystander exposure — where an individual is not directly handling asbestos materials but is present in the vicinity — has been recognized as a pathway for occupational asbestos disease.
The diseases associated with asbestos exposure from industrial products include mesothelioma, asbestosis, lung cancer, and other serious respiratory conditions. These illnesses often have latency periods of twenty to fifty years, meaning workers exposed to Koppers-associated products in the 1950s, 1960s, and 1970s may only now be receiving diagnoses.
Trust Fund / Legal Status
Koppers Company is a Tier 2 manufacturer for purposes of asbestos liability research on this site. The company has been named as a defendant in asbestos personal injury litigation, but as of the time of this writing, Koppers has not established a dedicated Section 524(g) asbestos bankruptcy trust fund through a Chapter 11 reorganization proceeding.
According to asbestos litigation records, Koppers has faced claims from workers and their families alleging asbestos-related disease connected to the company’s industrial products and job sites. These claims have been pursued through the civil court system rather than through a centralized trust fund mechanism.
For individuals or families researching potential claims connected to Koppers Company, the following considerations are relevant:
Litigation pathway: Claims against Koppers would be pursued through direct civil litigation rather than a trust fund claim process. An experienced asbestos attorney can assess the viability of a claim and identify the appropriate legal venue.
Exposure documentation: Workers who can document employment at facilities where Koppers supplied equipment or performed work — particularly steel mills, coke plants, and chemical processing facilities — may have a basis for a claim. Co-worker affidavits, employment records, and union records can help establish exposure history.
Multiple defendants: Many asbestos claimants have exposure histories involving products from multiple manufacturers. Even if Koppers is identified as one potential defendant, claims may also be filed against trust funds established by other asbestos product manufacturers, potentially including insulation manufacturers, gasket suppliers, and refractory product producers whose materials were used in the same facilities and alongside the same equipment.
Statute of limitations: Asbestos claims are subject to statutes of limitations that vary by state and typically begin to run from the date of diagnosis rather than the date of exposure. Prompt consultation with an asbestos litigation attorney is advisable for anyone recently diagnosed with an asbestos-related disease.
Plain-Language Summary
Koppers Company has been named in asbestos lawsuits filed by workers who were exposed to asbestos-containing materials in connection with the company’s industrial furnace systems, coke oven equipment, and chemical processing installations. Koppers does not operate a dedicated asbestos bankruptcy trust fund, so claims involving this company proceed through the civil court system. Workers who spent careers in steel mills, coke plants, or industrial chemical facilities — particularly those who performed maintenance, insulation, or mechanical work on high-temperature industrial systems — may have a documented exposure history that supports a legal claim. Families of workers who have died from mesothelioma or other asbestos-related diseases may have wrongful death claims as well. Consulting an attorney who specializes in asbestos litigation is the recommended first step for anyone seeking to evaluate their legal options.