Narcogun MCD-344 by Keene Corporation

Product Description

The Narcogun MCD-344 was an industrial product manufactured by Keene Corporation, a diversified manufacturer that produced a broad range of construction, industrial, and specialty materials throughout much of the twentieth century. Keene Corporation operated across multiple product lines and market segments, and the Narcogun MCD-344 was one of several industrial products associated with the company’s portfolio that has appeared in asbestos-related legal proceedings.

The MCD-344 designation is associated with product categories spanning floor tile, pipe insulation, refractory materials, spray-applied fireproofing compounds, and valve and steam trap components. This range of applications reflects the industrial versatility common to Keene Corporation’s product lines, which were distributed into commercial construction, heavy industry, and manufacturing environments. Products in these categories were widely used in settings such as power plants, refineries, shipyards, industrial facilities, and large commercial building projects throughout the periods when asbestos was a standard component of such materials.

Specific production dates for the Narcogun MCD-344 have not been independently confirmed in publicly available documentation reviewed for this article. However, given Keene Corporation’s documented history of asbestos-containing product manufacturing and the industries served, use of this product would be consistent with the broader mid-twentieth century period during which asbestos was routinely incorporated into industrial materials before regulatory restrictions took hold under OSHA and EPA frameworks beginning in the 1970s.

Asbestos Content

The asbestos content of the Narcogun MCD-344 has not been independently verified through a specific laboratory disclosure or publicly available material safety data sheet reviewed for this article. However, litigation records document claims that Keene Corporation incorporated asbestos-containing materials across multiple product lines falling within the same categories attributed to this product.

Products designed for floor tile applications frequently contained chrysotile asbestos as a binder and reinforcing fiber. Pipe insulation products of this era commonly utilized chrysotile, amosite, or combinations of asbestos fiber types to achieve required thermal performance and durability. Refractory materials — designed to withstand extremely high temperatures — historically relied on asbestos fiber content to maintain structural integrity under intense heat exposure. Spray-applied fireproofing compounds, a category heavily scrutinized under AHERA regulations, were among the most asbestos-dense industrial materials manufactured during this period, with some formulations containing asbestos fiber by a significant weight percentage. Valve and steam trap components used in high-pressure industrial systems similarly relied on asbestos-containing packing, gasket, and insulating materials to perform reliably under operational demands.

Plaintiffs alleged in asbestos litigation involving Keene Corporation products that these materials released respirable asbestos fibers during normal installation, use, cutting, fitting, and removal — activities that were routine across the industries and trades where Narcogun MCD-344 and similar products were deployed.

How Workers Were Exposed

Industrial workers represent the primary exposure population documented in litigation records associated with Keene Corporation products. The multi-category nature of the Narcogun MCD-344 — spanning floor tile, pipe insulation, refractory applications, spray fireproofing, and valve and steam trap components — means that exposure pathways were varied and occurred across many different worksite conditions.

Workers involved in the installation of floor tile products were exposed when cutting tiles to fit dimensions, sanding surfaces, and removing adhesives or existing tile materials. These activities are documented under AHERA regulations as generating friable asbestos debris capable of becoming airborne.

Workers handling pipe insulation faced exposure during the application of insulating materials to pipe runs, during repairs requiring the removal of existing insulation, and during routine maintenance activities in enclosed mechanical spaces where asbestos dust could accumulate without adequate ventilation. Pipefitters, steamfitters, and general industrial maintenance workers were among those most frequently present in these environments.

Refractory workers and those performing high-temperature furnace or boiler work were exposed through the mixing, application, and repair of refractory materials. These tasks disturbed asbestos-containing compounds in ways that OSHA documentation has long associated with elevated fiber release.

Spray-applied fireproofing installation was among the highest-exposure activities associated with asbestos-containing products across the construction trades. Workers applying these compounds, as well as other tradespeople present on job sites where spray fireproofing was being applied, were exposed to significant airborne fiber concentrations. Litigation records document that workers in proximity to spray fireproofing operations — even those not directly applying the materials — sustained documented asbestos exposure.

Valve and steam trap maintenance workers, including those in power generation, petrochemical, and heavy manufacturing industries, encountered asbestos in the form of packing materials, gasket compounds, and insulation components integral to valve assemblies. Disassembling, repacking, or replacing these components released asbestos fibers into the immediate work environment.

Plaintiffs alleged that exposure to Keene Corporation products, including those in the Narcogun product line, occurred without adequate warning of the known health hazards associated with asbestos fiber inhalation, and that this exposure contributed to the development of serious asbestos-related diseases including mesothelioma, asbestosis, and lung cancer.

This article is provided for informational purposes based on litigation records, regulatory documentation, and publicly available information. It does not constitute legal advice. Individuals with potential asbestos exposure claims should consult a licensed attorney.