A.O. Smith Corporation — Asbestos Product Reference

Company History

A.O. Smith Corporation is an American manufacturer with a long industrial history spanning more than a century. Founded in Milwaukee, Wisconsin, the company grew from a small metal fabrication shop into a diversified industrial enterprise with divisions serving the automotive, petroleum, and construction industries. Over the decades, A.O. Smith became particularly well known for its work in pressure vessels, storage tanks, water heaters, and piping systems — product categories that placed its goods directly on industrial jobsites across the United States during the mid-twentieth century.

During the post-World War II industrial expansion, A.O. Smith supplied components and systems to refineries, chemical plants, shipyards, power generation facilities, and large-scale construction projects. This period — roughly the 1940s through the early 1980s — coincided with the peak era of asbestos use in American manufacturing. Asbestos was prized throughout these industries for its thermal insulation properties, fire resistance, and durability, and it was incorporated into a wide range of building and industrial materials that workers encountered daily.

According to asbestos litigation records, A.O. Smith’s involvement in asbestos-related claims stems primarily from pipe insulation and related thermal products that were allegedly manufactured or distributed by the company during this era. The company is understood to have ceased incorporating asbestos into its products approximately in the early 1980s, consistent with broader regulatory changes and mounting evidence of the health risks associated with asbestos fiber exposure.

Asbestos-Containing Products

According to asbestos litigation records, A.O. Smith manufactured or supplied pipe insulation products that plaintiffs alleged contained asbestos as a primary or supplementary component. Pipe insulation was among the most asbestos-intensive product categories used on American jobsites during the mid-twentieth century. Asbestos fibers — most commonly chrysotile, but sometimes amosite or other amphibole varieties — were mixed into insulating compounds, pipe wrap, and molded pipe covering sections to provide thermal protection for hot water lines, steam lines, process piping, and other high-temperature applications.

Court filings document allegations that A.O. Smith’s pipe insulation products were installed in a variety of industrial and commercial settings, including power plants, refineries, manufacturing facilities, and large institutional buildings. In many of these settings, workers were required to cut, fit, and apply pipe insulation as part of routine construction or maintenance work — tasks that, according to plaintiffs, generated significant quantities of respirable asbestos dust.

Because specific product names, formulations, and asbestos content percentages associated with A.O. Smith’s pipe insulation line are not uniformly documented in publicly available records, workers and attorneys researching exposure history are encouraged to consult litigation databases, trade records, and occupational safety archives for product-specific documentation. Plaintiffs in asbestos litigation have alleged that these products released asbestos fibers during normal installation and handling, as well as during later maintenance, repair, or removal work.

It is important to note that pipe insulation in this era was typically installed in close proximity to other insulation materials, gaskets, and mechanical components that also may have contained asbestos. Workers who handled A.O. Smith pipe insulation products may have had simultaneous exposure to asbestos-containing materials from multiple manufacturers and product categories, complicating individual exposure histories.

Occupational Exposure

Workers in a range of trades and industries were potentially exposed to asbestos fibers from pipe insulation products, including those attributed to A.O. Smith in litigation records. The following occupational groups are most frequently identified in asbestos exposure histories involving pipe insulation:

  • Pipefitters and plumbers who cut, shaped, and fitted insulating materials around piping systems in new construction and retrofit projects
  • Insulators (asbestos workers) who applied, removed, and replaced pipe insulation as a primary job function
  • Boilermakers and pipework mechanics who worked in proximity to insulated piping in power generation and industrial settings
  • Maintenance and repair workers who disturbed existing pipe insulation during equipment servicing, often without respiratory protection
  • Shipyard workers who installed or repaired pipe systems aboard vessels, where asbestos-insulated piping was used extensively
  • Refinery and chemical plant workers who operated in facilities heavily reliant on insulated process piping over long career spans
  • Construction laborers on large commercial and industrial projects where pipe insulation was installed alongside other trades

Pipe insulation work is considered particularly hazardous because cutting and fitting asbestos-containing materials released high concentrations of airborne fibers in enclosed spaces. Workers in the trades listed above often performed this work without respirators or other protective equipment, particularly prior to the 1970s, when federal occupational health standards for asbestos exposure began to be established and enforced.

According to asbestos litigation records, bystander exposure was also a documented concern in many of these settings. Workers in adjacent trades — electricians, carpenters, painters, and others — who worked in areas where pipe insulation was being installed or removed may have inhaled asbestos fibers without directly handling the materials themselves.

Asbestos-related diseases caused by occupational exposure typically have a latency period of 20 to 50 years between initial exposure and the onset of symptoms. This means that workers exposed to asbestos-containing pipe insulation during the 1950s, 1960s, and 1970s may only now be receiving diagnoses of mesothelioma, lung cancer, asbestosis, or pleural disease. Family members of exposed workers may also have experienced secondary exposure through asbestos fibers carried home on work clothing, tools, and hair — a phenomenon sometimes referred to as take-home or household exposure.

A.O. Smith is classified under Tier 2 of asbestos litigation status for purposes of this reference: the company has been named in asbestos personal injury litigation, but it has not established a dedicated asbestos bankruptcy trust fund for the resolution of claims. This means that individuals seeking compensation for asbestos-related illness allegedly linked to A.O. Smith products must pursue their claims through the civil court system rather than through an administrative trust fund claims process.

Court filings document that A.O. Smith has been a named defendant in asbestos personal injury lawsuits brought by workers and their families alleging exposure to the company’s pipe insulation products. Plaintiffs in these cases have alleged that A.O. Smith knew or should have known of the health hazards associated with asbestos-containing insulation and failed to adequately warn users of those risks. These are allegations contained in litigation pleadings; liability has not been established as a matter of legal fact applicable to all claims.

Because no A.O. Smith asbestos trust fund exists, workers or family members seeking compensation based on alleged exposure to A.O. Smith products would need to file a traditional civil lawsuit. This type of claim is typically handled by asbestos plaintiff law firms that work on contingency — meaning no attorney fee is charged unless compensation is recovered. In many cases, individuals diagnosed with asbestos-related illness have exposure histories involving multiple manufacturers and product types. An asbestos attorney can evaluate whether claims against A.O. Smith, other named defendants, and existing asbestos bankruptcy trusts may be appropriate based on the specific facts of each case.

If you or a family member worked with or around pipe insulation products on jobsites during the 1940s through the early 1980s, and have since been diagnosed with mesothelioma, lung cancer, asbestosis, or a related condition, the following points are relevant to your situation:

  • A.O. Smith has been named in asbestos litigation, with plaintiffs alleging exposure through pipe insulation products manufactured or supplied by the company.
  • No A.O. Smith asbestos bankruptcy trust fund exists. Compensation claims involving this company must be pursued through civil litigation rather than an administrative trust claims process.
  • Many exposure histories involve multiple defendants. Even if A.O. Smith products are part of your exposure history, you may also have valid claims against other manufacturers who have established asbestos trust funds, potentially allowing for compensation through both litigation and trust fund channels simultaneously.
  • Statute of limitations rules apply. Time limits for filing asbestos claims vary by state and begin running from the date of diagnosis, not the date of exposure. Prompt consultation with an experienced asbestos attorney is important to preserve your legal options.
  • Documentation strengthens claims. Employment records, union membership records, product invoices, and coworker testimony can all help establish exposure history when pursuing litigation involving pipe insulation products.

Workers and families researching A.O. Smith’s role in asbestos exposure history are encouraged to consult with a qualified asbestos litigation attorney to evaluate individual circumstances and determine the full range of available legal remedies.