Mesothelioma

Who May Have Been Exposed at American Steel and Foundry Co

Exposure Risk Was Not Limited to Insulation Workers

Asbestos-containing materials were reportedly present across building systems and process equipment throughout the facility. Anyone who worked near those materials as they were disturbed — whether or not they were the one disturbing them — may have been exposed to respirable fibers.

Insulators (Heat and Frost Insulators)

Workers in this trade mixed, applied, cut, and removed pipe covering, block insulation, and insulating cement throughout steam and process systems. Cutting preformed pipe covering with a handsaw, troweling insulating cement onto irregular surfaces, and stripping old insulation during maintenance overhauls released substantial quantities of respirable fiber. Missouri heat and frost insulators — members of Heat and Frost Insulators Local 1 (St. Louis) and affiliated locals — appear with striking frequency in historical asbestos litigation records arising from foundry and industrial facility work throughout the St. Louis metropolitan area. Local 1’s jurisdiction covered the same Mississippi River industrial corridor that included AMSCO, the generating stations at Labadie and Portage des Sioux, and Granite City Steel across the river.

Pipefitters and Steamfitters

Pipefitters routinely cut through and disturbed existing pipe insulation to reach the piping beneath for repair or replacement. Breaking flanges covered in asbestos-containing insulating cement and cutting through lagged piping to install new sections were standard tasks that released fiber at high concentrations. Pipefitters and steamfitters dispatched out of UA Local 562 (St. Louis) worked across the Mississippi River industrial corridor during the peak asbestos era, logging hours at AMSCO, Monsanto, Portage des Sioux, and other sites — often within a single career. Exposure at multiple jobsites may support claims against multiple defendants.

Boilermakers

Boilermakers constructed, maintained, and repaired industrial boilers, with asbestos exposure occurring during installation and removal of refractory lining, application of block insulation to boiler exteriors, and handling of rope gaskets used to seal boiler access doors. Boiler work frequently occurred in confined spaces where disturbed fiber had nowhere to go. Members of Boilermakers Local 27 (St. Louis) are well-represented in mesothelioma case filings arising from industrial facilities in the St. Louis region. Local 27’s membership history at AMSCO and at neighboring facilities has been the subject of discovery in prior litigation.

Electricians

Electricians ran conduit through insulated chases and worked in mechanical rooms where insulated piping was disturbed by other trades. Wire and cable products from this era reportedly contained asbestos-containing insulation in some product categories. Electricians are frequently documented as bystander-exposure victims — present during other trades’ insulation work without any direct involvement and without any warning that the dust in the air was deadly.

Foundry Workers and Furnace Operators

Workers who operated and maintained furnace equipment may have been exposed during lining inspection, patching, and relining operations. Removing damaged refractory brick and applying patching cements released fiber at high concentrations inside enclosed furnace environments — some of the most dangerous conditions documented in industrial asbestos exposure literature.

Millwrights and Maintenance Mechanics

Millwrights performed facility-wide repair and upkeep, working across every department and potentially near asbestos-containing materials under a wide range of conditions throughout the plant.

Laborers and Helpers

Laborers assisted skilled trades, cleaned work areas, and disposed of insulation debris. Sweeping up insulation waste without respiratory protection — a standard practice before OSHA’s asbestos regulations took hold — could generate fiber concentrations as high as the original installation work.