Narcogun CM-343 by Keene Corporation

Product Description

The Narcogun CM-343 was an industrial product manufactured by Keene Corporation, a diversified manufacturing company that operated across multiple industrial sectors throughout the mid-twentieth century. Keene Corporation built a broad product portfolio that spanned construction materials, insulation systems, refractory compounds, and mechanical components — many of which were formulated during an era when asbestos was widely regarded as an indispensable industrial material.

The Narcogun CM-343 appears in litigation records in connection with several industrial product categories, including floor tile, pipe insulation, refractory materials, spray-applied fireproofing, and valves and steam traps. This cross-category presence reflects the manufacturing philosophy of the period, during which asbestos-containing formulations were applied across a wide range of product lines for their heat resistance, tensile strength, and fire-retardant properties.

Keene Corporation’s products were distributed broadly throughout American industrial facilities, manufacturing plants, shipyards, power-generating stations, and commercial construction projects. The Narcogun CM-343 designation has been identified in litigation documents as part of this broader product history, placing it within the industrial environments where Keene-manufactured goods were regularly specified, installed, and maintained.

Asbestos Content

Litigation records document that Keene Corporation incorporated asbestos-containing materials into a range of its manufactured products during the decades when such use was standard industry practice. Plaintiffs alleged that the Narcogun CM-343 contained asbestos as a functional component consistent with its identified product categories.

The product categories associated with the Narcogun CM-343 are each independently recognized in regulatory and occupational health literature as historically significant sources of asbestos exposure:

  • Floor tile formulations of the mid-twentieth century routinely incorporated chrysotile asbestos as a binder and reinforcing agent, contributing to the tile’s durability and dimensional stability.
  • Pipe insulation products relied on asbestos — in forms including amosite and chrysotile — for their ability to withstand high-temperature steam and process piping environments.
  • Refractory materials were frequently compounded with asbestos to maintain structural integrity under extreme and sustained heat conditions found in furnaces, boilers, and kilns.
  • Spray-applied fireproofing products, one of the most heavily regulated asbestos-containing material categories under the U.S. Environmental Protection Agency’s Asbestos Hazard Emergency Response Act (AHERA), delivered asbestos fibers directly into the breathing zones of application workers and nearby trades.
  • Valves and steam traps in industrial systems often incorporated asbestos-containing packing, gaskets, and insulating components to maintain sealing integrity under high-pressure, high-temperature operating conditions.

Plaintiffs alleged that Keene Corporation was aware, or should have been aware, of the health hazards associated with asbestos-containing products during the relevant periods of manufacture and distribution, and that adequate warnings were not provided to end users or workers.

How Workers Were Exposed

Industrial workers across a wide range of job functions and facility types encountered the Narcogun CM-343 and related Keene Corporation products in the course of routine occupational duties. Litigation records document that exposure pathways varied by product type but shared a common characteristic: the release of respirable asbestos fibers into occupied work areas.

Installation and application represented primary exposure events. Workers applying spray fireproofing products worked directly with aerosolized material, creating conditions in which asbestos fiber concentrations could reach significant levels in enclosed or semi-enclosed spaces. Pipe insulation installers cut, shaped, and fitted insulating sections around process piping, generating dust that plaintiffs alleged contained respirable asbestos fibers.

Flooring installation and removal activities associated with asbestos-containing floor tile exposed workers during both the original installation phase and, critically, during subsequent removal or replacement projects. Cutting, grinding, and scraping operations on asbestos-containing floor tile are recognized by OSHA as disturbance activities capable of generating airborne fiber release.

Maintenance and repair operations created secondary exposure pathways for workers who were not directly involved in original installation. Industrial maintenance personnel servicing valves, steam traps, boilers, and associated piping systems disturbed asbestos-containing packing and insulating materials during the normal course of equipment servicing. Refractory repair in furnaces and boiler settings similarly required the breaking apart and replacement of asbestos-containing compounds.

Bystander exposure is also documented in litigation records, reflecting the reality that asbestos fibers released during one trade’s work activities contaminated shared air in industrial environments, affecting workers in adjacent areas who had no direct contact with the product itself.

The industrial settings where Keene Corporation products were most commonly documented — manufacturing plants, power stations, chemical processing facilities, and heavy industrial operations — were environments characterized by multiple simultaneous trades working in proximity, compounding individual exposure potential. General industrial workers who moved through these environments over careers spanning decades accumulated exposures that plaintiffs alleged contributed to the development of asbestos-related diseases including mesothelioma, asbestosis, and lung cancer.

The Narcogun CM-343 is classified as a Tier 2 — Litigated product. No active asbestos bankruptcy trust fund has been identified as the primary resolution mechanism for claims specifically involving this product designation and Keene Corporation as manufacturer in its current corporate form. Claims involving this product are pursued through civil litigation in state and federal courts.

Civil Litigation

Litigation records document claims filed against Keene Corporation and its successor interests by industrial workers and their families alleging asbestos-related disease caused by exposure to Keene-manufactured products. Plaintiffs alleged that Keene Corporation failed to adequately warn workers of the known hazards of asbestos exposure, and that this failure contributed directly to diagnoses of mesothelioma, lung cancer, and asbestosis among those who worked with or around Keene products.

Individuals or surviving family members seeking legal remedy should be aware that:

  • Statutes of limitations apply in asbestos litigation and vary by state jurisdiction. The applicable limitations period typically begins running from the date of diagnosis of an asbestos-related disease, not from the date of exposure.
  • Product identification is an important element of asbestos claims. Workers or their families who can document occupational contact with Keene Corporation products, including the Narcogun CM-343, through employment records, union records, co-worker testimony, or facility documentation strengthen the evidentiary basis for a claim.
  • Qualified legal counsel experienced in asbestos litigation can evaluate individual exposure histories, identify all potentially responsible parties — which may include manufacturers, distributors, premises owners, and contractors — and determine the appropriate legal venue and strategy.

Workers who were employed in industrial settings where Keene Corporation products were present, and who have received a diagnosis of mesothelioma, asbestosis, lung cancer, or another asbestos-related condition, are encouraged to consult with an attorney who concentrates in asbestos disease litigation to understand their available legal options.

This article is provided for informational and reference purposes. It does not constitute legal advice. Product identification and legal eligibility should be evaluated by qualified asbestos litigation counsel.