Guide for Boilermakers Local 900 Members

A Comprehensive Resource for Members, Families, and Legal Representatives

Why This Guide Exists

For decades, members of International Brotherhood of Boilermakers Local 900 in Cleveland built, maintained, and repaired the industrial equipment that powered northeastern Ohio’s economy. They worked inside boilers, pressure vessels, heat exchangers, and industrial furnaces at steel mills, power plants, and refineries. That work may have placed them at the center of one of the worst occupational health disasters in American history.

Asbestos was reportedly present throughout the industrial sites where Local 900 members worked. The physical demands of boilermaking — tearing out old insulation, cutting refractory brick, welding on lagged pipe — may have put these workers in direct, repeated contact with asbestos-containing materials, often in confined spaces with minimal ventilation.

If you are a Local 900 member, a retired member, or a family member of someone who performed this work, this guide covers your likely exposure history, the diseases that follow asbestos contact, and the legal options available to you through a qualified asbestos attorney Ohio or asbestos cancer lawyer Cleveland.

⚠️ FILING DEADLINE ALERT: Ohio law imposes a strict two-year statute of limitations from the date of diagnosis to file a personal injury asbestos lawsuit. Miss that window and your right to compensation is gone permanently. If you or a family member has been diagnosed, contact a mesothelioma lawyer Ohio today — not next month, today.

What Boilermakers Do and Where Asbestos Entered the Work

The International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers (IBB) is one of North America’s oldest trade unions. Local 900, based in Cleveland, historically represented boilermakers throughout Cuyahoga County and the northeastern Ohio industrial corridor.

Boilermakers perform a specific set of tasks. Each created opportunities for asbestos exposure Ohio that occupational health researchers have consistently documented.

Boiler Construction and Installation

Workers assembled pressure vessels, fireboxes, and steam drums, then applied insulating blankets, block insulation, and cement to hot surfaces. New construction routinely involved materials that reportedly contained asbestos. These were high-temperature environments, and thermal insulation was applied throughout. Boilermakers handling these materials may have inhaled asbestos fibers without warning or respiratory protection.

Boiler Repair and Rebuilding

Repair work required removing deteriorated insulation before accessing the equipment underneath. Workers replaced tubes, repaired fireboxes, and relined furnaces. Refractory repair was the most hazardous phase. Tear-out work reportedly generated some of the highest airborne asbestos fiber concentrations documented in industrial settings. Occupational health research consistently identifies removal of asbestos-containing insulation as a peak-exposure activity.

Refractory Work and Furnace Maintenance

Boilermakers installed and repaired refractory linings protecting the interior surfaces of boilers and furnaces. They handled refractory bricks, castable refractories, and ceramic fiber blankets — materials that reportedly contained asbestos through much of the mid-twentieth century. Cutting and fitting these materials generated heavy dust.

Pressure Vessel Work

Work extended beyond boilers to heat exchangers, autoclaves, and industrial tanks used in chemical processing. The insulation, gaskets, and packing materials in these systems allegedly contained asbestos in substantial quantities.

Welding and Torch Cutting on Insulated Systems

Welding on or next to insulated pipe and equipment was routine boilermaker work. That work disturbed asbestos lagging and insulation and released fibers directly into the breathing zone. Through most of the twentieth century, workers received no warning and took no precautions.

Maintenance Shutdowns and Industrial Turnarounds

Scheduled plant-wide maintenance periods concentrated boilermakers and multiple other trades in enclosed spaces. Simultaneous disturbance of insulation from different activities in the same area created conditions that industrial hygienists have described as fiber storm environments — among the highest-exposure scenarios documented in occupational health literature.

Cleveland-Area Facilities: Where Local 900 Members Worked

The greater Cleveland area hosted some of the most heavily industrialized facilities in the country. Local 900 members may have been exposed to asbestos across this industrial landscape. If you worked at any of these facilities, an asbestos lawsuit Ohio may be available to you. Consult with a toxic tort attorney or asbestos attorney Ohio to evaluate your exposure history.

Steel Industry Facilities

Republic Steel Corporation — Cleveland Works

Republic Steel operated blast furnaces, open-hearth furnaces, electric arc furnaces, and coke batteries in Cleveland. Members of Local 900 may have been exposed to asbestos-containing insulation throughout that facility. Boiler systems reportedly required extensive thermal insulation, and refractory materials allegedly included asbestos-containing components. Republic Steel has been the subject of numerous asbestos-related claims in Ohio litigation records.

United States Steel Corporation — Cleveland District

U.S. Steel ran large-scale boiler house operations with steam generation equipment and industrial furnaces. Workers may have been exposed to asbestos-containing pipe lagging, boiler insulation, and refractory materials consistent with steel production industry standards of the era.

LTV Steel (formerly Jones & Laughlin / Republic Steel)

Post-merger operations continued at former Republic and J&L facilities. Workers maintained aging infrastructure. Deteriorating asbestos-containing insulation from earlier decades allegedly presented compounding exposure risks as materials broke down and became friable.

Other Steel Operations

Inland Steel and smaller Cleveland-area facilities also employed boilermakers for boiler house maintenance and industrial furnace work where asbestos-containing materials were reportedly in use.

Electric Power Generation Facilities

Cleveland Electric Illuminating Company (CEI) — Generating Stations

CEI operated Lake Shore Power Plant, Avon Lake Power Plant, and other northeastern Ohio stations. Electric power generating stations are among the most heavily documented sites of asbestos use in American industrial history. Boiler systems at these facilities routinely used block insulation, blanket insulation, and boiler cement formulations that reportedly contained asbestos. Turbine insulation, pipe lagging, and gasket materials at CEI stations have all been the subject of exposure allegations in Cuyahoga County asbestos lawsuit litigation.

Ohio Edison Company Facilities

Ohio Edison operated generating facilities within Local 900’s geographic jurisdiction. These stations used insulation systems comparable to those documented at CEI facilities, and Local 900 members who performed maintenance at Ohio Edison generating stations may have been exposed to asbestos-containing materials.

Municipal Light Plant — City of Cleveland

The city’s municipally operated generating facility used contract boilermakers for maintenance and repair. Boiler insulation and lagging materials at this facility reportedly contained asbestos consistent with industry practice throughout much of the twentieth century.

Oil Refining and Petrochemical Facilities

Standard Oil of Ohio (Sohio) / BP America — Cleveland Refinery

Sohio operated one of the largest petroleum refining operations in Ohio. Refinery environments are particularly associated with heavy asbestos use in the occupational health literature. Extensive high-temperature, high-pressure piping networks required insulation throughout. Workers may have been exposed to asbestos-containing pipe insulation, equipment insulation, gaskets, and packing materials during process vessel maintenance, fired heater repair, and boiler house operations. Scheduled turnarounds allegedly created conditions of significant asbestos fiber release.

Diamond Shamrock Corporation — Cleveland-Area Operations

Diamond Shamrock’s chemical and petrochemical processing facilities required pressure vessel and boiler maintenance. Process equipment at these sites allegedly used asbestos-containing gaskets and insulation materials during operations throughout much of the twentieth century.

Heavy Manufacturing Facilities

Ford Motor Company — Brook Park Assembly and Engine Plants

Ford’s Brook Park operations included large boiler houses and heat-treating equipment. Workers may have been exposed to asbestos-containing boiler insulation and related materials during maintenance operations at this facility.

General Motors — Parma and Cleveland Facilities

GM’s northeastern Ohio manufacturing facilities included boiler houses, paint curing ovens, and industrial furnaces. Regular boilermaker maintenance reportedly involved asbestos-containing insulation materials throughout these operations.

TRW Inc. — Cleveland-Area Manufacturing

TRW operated significant boiler and pressure vessel installations at Cleveland-area facilities. Former workers have reportedly alleged asbestos exposure during maintenance activities at these sites.

NASA Glenn Research Center (formerly Lewis Research Center) — Brook Park

Glenn Research Center’s specialized testing and research operations required high-temperature testing apparatus and boiler systems. Boilermakers who worked at this facility may have encountered asbestos-containing materials in the infrastructure.

Chemical Industry Facilities

Diamond Alkali / Diamond Shamrock — Painesville and Cleveland-Area Plants

Chemical manufacturing operations at these facilities included extensive insulated pipe networks, reactor vessels, heat exchangers, and boiler systems. Maintenance work allegedly involved asbestos-containing insulation and gasket materials throughout the period of heaviest industrial asbestos use.

Harshaw Chemical Company

Harshaw maintained a significant Cleveland industrial presence and employed boilermakers for maintenance of insulated chemical process equipment where asbestos-containing materials were reportedly in use.

Great Lakes Maritime Operations

Cleveland’s position on Lake Erie created regular maritime work for Local 900 members. Great Lakes ore carriers, lake freighters, and tugboats operating from Cleveland harbor used boilers and steam systems that reportedly contained asbestos insulation throughout their operating infrastructure. The marine industry’s reliance on asbestos is extensively documented in occupational health literature and litigation records.

Asbestos-Containing Products in Boilermaking Work

Boilermakers encountered a specific array of asbestos-containing products. These were standard components of boiler, pressure vessel, and industrial furnace systems through most of the twentieth century. Their presence in boilermaker work environments is documented in occupational health literature, manufacturer records, and litigation discovery.

Thermal Insulation Systems

Boiler Block Insulation

Calcium silicate and magnesia block insulation covered boiler exteriors, steam drums, and steam lines. Manufacturers including Johns-Manville (Thermobestos® block), Armstrong World Industries, and Combustion Engineering supplied these products with asbestos as a standard component through the 1970s. Boilermakers cut, fit, and applied this material during new construction at facilities including Republic Steel Cleveland Works, CEI generating stations, and the Sohio Cleveland Refinery. The same workers removed and replaced it during repair operations — the higher-exposure side of the work.

Pipe and Fitting Insulation

Steam and process piping associated with boiler systems ran throughout every major industrial facility. Kaylo® pipe insulation, Johns-Manville pipe wrap products, and pre-formed fitting covers were used to insulate elbows, valves, and flanges at facilities including the Standard Oil Cleveland Refinery and CEI power stations. Hand-shaping and cutting these materials generated heavy dust. Pipe insulators and boilermakers are consistently identified in occupational research as trades with among the highest documented asbestos fiber exposures.

Boiler Lagging and Insulating Cement

Outer coverings over block insulation and joint sealants allegedly contained asbestos as a standard component through much of the mid-twentieth century. Workers mixed dry powder and troweled it onto surfaces during facility maintenance shutdowns, generating significant airborne dust at close range in spaces with little or no ventilation.

Refractory Ceramic Fiber Products

High-temperature ceramic fiber blankets and modules used in furnace refractory work reportedly contained asbestos or asbestos-like aluminosilicate fibers through the 1970s and beyond. Cutting, fitting, and installing these products at Republic Steel Cleveland Works and comparable facilities generated substantial dust.

Specific Product Lines and Manufacturers

Manufactured Pipe Insulation

Johns-Manville Thermobestos® and Kaylo® block products: widely documented in boiler house applications at Cleveland industrial facilities
Armstrong World Industries asbestos-containing calcium silicate insulation: standard specification at power generation facilities
Owens-Corning and Owens-Illinois products: identified in mid-1970s applications
W.R. Grace insulation products: used in industrial boiler applications throughout the period

These products were reportedly specified and used at CEI generating stations and the Standard Oil of Ohio refinery throughout the twentieth century.

Gasket and Packing Materials

Johns-Manville gaskets, Flexitallic® spiral-wound gaskets with asbestos filler, and braided packing materials sealed connections on steam lines and pressure vessels. These products are routinely identified in asbestos-related litigation as sources of occupational exposure for boilermakers and pipefitters working in industrial settings.

Boiler Cement and Refractory Materials

Thermal cement and refractory castables applied