Met-L-Flex / Metropolitan Life Insurance Company and Asbestos Pipe Insulation: Exposure History and Legal Background

Note to readers: Metropolitan Life Insurance Company (MetLife) has appeared in asbestos litigation in a capacity distinct from most product manufacturers. This article explains that unique role, the exposure claims associated with it, and options available to workers and families researching asbestos exposure history.

Company History

Metropolitan Life Insurance Company, commonly known as MetLife, was founded in New York City in 1868 and grew to become one of the largest insurance and financial services companies in the United States. Unlike the majority of companies discussed on this site, MetLife did not manufacture asbestos-containing products in the traditional sense. Instead, according to asbestos litigation records, MetLife’s role in asbestos-related harm is alleged to have been that of an institutional actor — specifically, an organization that possessed medical and epidemiological knowledge about the hazards of asbestos exposure and allegedly failed to share that information with workers, the public, or regulatory authorities.

Court filings in numerous asbestos cases document allegations that MetLife had a long-standing relationship with the asbestos industry, including with major asbestos product manufacturers, and that the company conducted or was privy to medical research demonstrating the serious health risks of asbestos dust as early as the 1930s and 1940s. Plaintiffs alleged that MetLife, through this relationship, helped to suppress or limit public dissemination of findings that could have warned workers about asbestos dangers decades before federal regulations were enacted.

MetLife has remained a functioning, solvent corporation. It has not filed for bankruptcy protection as a result of asbestos litigation and has not established a dedicated asbestos personal injury trust fund.

Asbestos-Containing Products

MetLife did not manufacture, distribute, or sell pipe insulation or other asbestos-containing construction materials under its own brand. However, according to asbestos litigation records, plaintiffs have alleged a connection between MetLife and the broader asbestos industry through its role as an institutional insurer and alleged co-participant in industrial health research conducted in the mid-twentieth century.

Court filings document that MetLife employed or worked alongside physicians and researchers — most notably Dr. Anthony Lanza — who conducted studies on asbestosis and related diseases in the 1930s. Plaintiffs alleged that findings from these studies, which documented serious pulmonary disease among asbestos workers, were modified or withheld from publication in a form that understated the risks. Asbestos litigation records further allege that this suppression of medical evidence allowed asbestos-containing products — including pipe insulation, boiler insulation, block insulation, and related thermal insulation materials — to remain in widespread use without adequate hazard warnings long into the postwar industrial boom.

Because of this alleged institutional role, MetLife has been named as a defendant in asbestos personal injury and wrongful death cases brought by workers who were exposed to pipe insulation and other asbestos-containing products manufactured by third parties. The theory of liability advanced in these cases, according to court filings, is not that MetLife made a dangerous product, but that it participated in a course of conduct that delayed worker protection and knowledge.

It is important to note that MetLife has contested these allegations. No finding of liability against MetLife has been established as a universal legal fact, and outcomes have varied across individual cases and jurisdictions.

Occupational Exposure

Workers who were exposed to asbestos-containing pipe insulation and related thermal products during the peak industrial decades — roughly the 1940s through the early 1980s — are the primary population affected by the history described in this article. According to asbestos litigation records, the trades most frequently represented among plaintiffs who named MetLife as a defendant include:

  • Pipefitters and plumbers who installed, cut, and removed pre-formed pipe insulation containing chrysotile or amosite asbestos
  • Insulators who applied, stripped, or repaired block and pipe insulation in industrial and commercial settings
  • Boilermakers and steamfitters who worked in proximity to insulated pipes, boilers, and pressure vessels
  • Shipyard workers who encountered insulated piping systems aboard vessels during construction and overhaul
  • Construction tradespeople — including carpenters, laborers, and ironworkers — who worked in buildings where asbestos pipe insulation was installed or disturbed

These workers typically did not purchase or specify insulation products by brand. They encountered asbestos wherever it had been installed — in power plants, refineries, industrial facilities, shipyards, hospitals, schools, and commercial buildings. Court filings document that workers in these environments frequently had no knowledge that the insulation surrounding pipes and boilers contained asbestos fibers, and that they received no warnings about the health risks of inhaling asbestos dust.

Asbestos-related diseases associated with pipe insulation exposure include mesothelioma (a cancer of the lining of the lungs, abdomen, or heart), asbestos lung cancer, asbestosis, and pleural disease. These diseases typically have a latency period of 20 to 50 years, meaning workers exposed in the 1950s, 1960s, and 1970s may only now be receiving diagnoses.

Secondary exposure is also documented in asbestos litigation records. Family members of workers — particularly spouses who laundered work clothing — have alleged exposure to asbestos fibers carried home on work clothes, skin, and hair.

MetLife has not established an asbestos personal injury trust fund. The company has not filed for bankruptcy reorganization under Chapter 11, which is the mechanism through which most major asbestos defendants have created compensation trusts. MetLife remains a solvent, active corporation.

This means that individuals seeking to pursue a claim related to MetLife’s alleged role in asbestos harm must do so through the civil litigation system — by filing a personal injury or wrongful death lawsuit. Claims against MetLife cannot be submitted through an administrative trust fund process.

According to asbestos litigation records, MetLife has been named as a co-defendant alongside product manufacturers in asbestos injury cases, typically on theories of concert-of-action, civil conspiracy, or fraud — rather than product liability. The viability and success of such claims has varied significantly depending on the facts of individual cases, applicable law, and how courts have interpreted the available historical evidence.

Plaintiffs alleging exposure to asbestos-containing pipe insulation who are also pursuing claims against MetLife will generally already be working with legal counsel experienced in asbestos litigation, since the MetLife claims are typically brought in conjunction with product liability claims against the manufacturers of the specific insulation products involved.

Other Compensation Options for Pipe Insulation Exposure

Because MetLife did not manufacture pipe insulation, workers diagnosed with mesothelioma or other asbestos-related diseases after exposure to pipe and thermal insulation products may have additional, independent compensation options through:

  • Asbestos bankruptcy trust funds established by manufacturers of specific pipe insulation products, which may include trusts administered for companies such as Owens Corning, Armstrong World Industries, Combustion Engineering, Pittsburgh Corning, and others, depending on the products to which a worker was exposed
  • Workers’ compensation claims in applicable circumstances
  • Veterans’ benefits through the Department of Veterans Affairs, for those whose exposure occurred during military service, particularly in Navy shipyards

Summary: What Workers and Families Should Know

Metropolitan Life Insurance Company appears in asbestos litigation not as a manufacturer of asbestos-containing products, but as an alleged institutional participant in the suppression of medical knowledge about asbestos hazards. According to court filings and asbestos litigation records, plaintiffs have alleged that MetLife’s conduct delayed warnings that could have protected generations of American workers from asbestos-related disease.

MetLife has not admitted liability and has disputed these allegations. The company has not created an asbestos trust fund and remains subject to civil litigation.

If you or a family member was diagnosed with mesothelioma, asbestos lung cancer, or asbestosis following work with pipe insulation or other asbestos-containing thermal materials, your legal and financial options likely extend well beyond any single defendant. Asbestos attorneys typically conduct a comprehensive exposure history to identify all potentially responsible parties — including product manufacturers with active trust funds — and pursue all available avenues simultaneously. Statutes of limitations for asbestos claims vary and begin running at the time of diagnosis or discovery of the disease, making timely consultation with experienced counsel important.