Harbison-Walker Refractories Company

Company History

Harbison-Walker Refractories Company was founded in Pittsburgh, Pennsylvania, in 1865, making it one of the oldest and most established refractory manufacturers in the United States. Over more than a century of operation, the company grew into a dominant supplier of high-temperature refractory materials to the American steel, iron, and industrial manufacturing sectors. Its products were engineered for extreme-duty applications — furnace linings, kiln brickwork, boiler chambers, and coke oven walls — environments where conventional building materials would fail within hours of exposure to operational temperatures.

The company’s geographic footprint closely followed the industrial heartland of American heavy manufacturing. Harbison-Walker refractories were installed extensively throughout the Ohio River Valley and the Great Lakes steel belt, regions that formed the backbone of American steel production from the post-World War II era through the late 1970s. Mills in Pennsylvania, Ohio, Indiana, West Virginia, and Michigan relied on Harbison-Walker materials to keep blast furnaces and coke ovens operational under punishing thermal and chemical conditions.

In 1967, Harbison-Walker was acquired by Dresser Industries, a diversified industrial conglomerate headquartered in Dallas, Texas. Under Dresser’s ownership, Harbison-Walker continued to manufacture and market refractory products under its established brand identity. The company formally ceased incorporating asbestos into its refractory product lines in 1978, consistent with regulatory pressure and emerging awareness of asbestos-related health hazards during that period. Prior to that transition, however, Harbison-Walker produced and sold a range of refractory products that contained chrysotile and other forms of asbestos as functional additives — a practice standard across the refractory industry during the mid-twentieth century.

Asbestos-Containing Products

Harbison-Walker manufactured several categories of refractory products that contained asbestos prior to 1978. These products were designed for installation in high-heat industrial environments and were widely distributed to steel mills, foundries, power generation facilities, and chemical plants across the United States.

High-Alumina Insulating Refractory Brick (Asbestos-Containing Grades)

Certain grades of Harbison-Walker’s high-alumina insulating brick incorporated asbestos fibers as a reinforcing and insulating component. These lightweight refractory bricks were used to line the interior walls of industrial furnaces, boilers, and kilns. Their asbestos content improved thermal resistance and helped maintain structural integrity at sustained high temperatures. Workers who cut, fitted, or demolished these bricks — particularly in steel blast furnaces and coke ovens — were exposed to asbestos-laden dust generated during installation and maintenance work.

Plastic Refractories and Castables

Harbison-Walker produced plastic refractory compounds and castable refractory materials that contained asbestos fiber. Plastic refractories are dense, moldable materials applied by hand ramming or tamping to irregular surfaces inside furnaces and boiler fireboxes. Castables are mixed with water and poured or gunned into place. In both product types, asbestos fibers were incorporated to improve tensile strength, crack resistance, and high-temperature performance. Application of these materials generated substantial airborne fiber release, particularly during mixing, troweling, and the removal of old refractory linings.

Kaowool Ceramic Fiber Products (Post-Asbestos Transition)

Following the 1978 phase-out of asbestos, Harbison-Walker transitioned to ceramic fiber wool products marketed under the Kaowool brand. While Kaowool products do not contain asbestos, workers who handled Harbison-Walker materials during the transition period may have worked alongside legacy asbestos-containing refractories still in place from prior installations. The presence of both product generations on active industrial sites created overlapping exposure scenarios that are relevant to occupational history documentation.

Occupational Exposure

The primary exposure populations for Harbison-Walker asbestos-containing refractories were the industrial workers who installed, maintained, repaired, and demolished refractory linings at steel mills, foundries, coke plants, and industrial boiler facilities across the United States.

Refractory Bricklayers and Masons

Workers who laid Harbison-Walker insulating brick inside blast furnaces, coke ovens, and ladles were directly exposed to asbestos fibers released during cutting, breaking, and fitting of brick to irregular furnace walls. Hot repair work — performed while furnace interiors were still warm — was particularly hazardous, as residual asbestos fibers baked into old mortar joints could be dislodged during relining operations.

Boilermakers and Furnace Repair Crews

Industrial boilers lined with Harbison-Walker plastic refractories or castables required periodic relining and maintenance. Boilermakers who chipped out deteriorated castable material, applied fresh plastic refractory, or worked near these operations in enclosed boiler fireboxes faced concentrated asbestos exposure in poorly ventilated spaces.

Steel Mill Production Workers

Production workers employed at steel mills throughout the Ohio River Valley and Great Lakes region worked in facilities where Harbison-Walker refractories were integral components of blast furnace shells, torpedo ladles, soaking pits, and basic oxygen furnace linings. Routine furnace operations generated heat and mechanical stress that gradually broke down refractory linings, releasing fibers into mill air. Workers who were not directly involved in refractory installation — crane operators, tappers, and general laborers — could nonetheless accumulate significant asbestos exposure through ambient fiber levels in mill environments.

Insulators and Construction Trades

General industrial construction workers involved in the initial construction or major overhaul of steel production facilities often worked alongside refractory crews. Insulators, pipefitters, and laborers who mixed castable compounds, handled bags of dry refractory material, or cleaned up after refractory operations were exposed through secondary contact.

Secondary and Household Exposure

Family members of refractory workers faced potential secondary asbestos exposure through asbestos fibers brought home on work clothing, skin, and hair. This household exposure pathway is documented in asbestos medical literature and is recognized in the claims processes of many asbestos personal injury trusts.

Harbison-Walker Refractories Company is a Tier 1 trust fund defendant with an active asbestos personal injury trust established to compensate workers and family members harmed by exposure to the company’s asbestos-containing products.

The Harbison-Walker International Asbestos PI Trust

The Harbison-Walker International Asbestos Personal Injury Trust was established as part of the company’s bankruptcy reorganization proceedings. The trust holds dedicated assets specifically designated to pay valid claims from individuals diagnosed with asbestos-related diseases that are linked to exposure to Harbison-Walker products. The trust operates under court-approved procedures and Trust Distribution Procedures (TDP) that govern how claims are evaluated and compensated.

Who May Be Eligible to File a Claim

Individuals who may be eligible to file a claim with the Harbison-Walker International Asbestos PI Trust include:

  • Workers who directly installed, removed, or worked around Harbison-Walker refractory products prior to 1978
  • Workers employed at steel mills, coke plants, foundries, power plants, or other industrial facilities where Harbison-Walker refractories were used, even if they did not personally handle the products
  • Workers exposed during demolition or hot repair of furnaces lined with Harbison-Walker materials
  • Family members of exposed workers who developed an asbestos-related disease as a result of secondary household exposure

Qualifying Diagnoses

The Harbison-Walker trust, like most asbestos personal injury trusts, recognizes specific disease categories. These typically include:

  • Mesothelioma (malignant pleural, peritoneal, or pericardial)
  • Lung cancer (with documented asbestos exposure history)
  • Asbestosis (confirmed by pulmonary function testing and imaging)
  • Other asbestos-related conditions as defined in the trust’s TDP

How to File a Claim

Claims against the Harbison-Walker International Asbestos PI Trust are filed through legal representation. An attorney experienced in asbestos trust fund claims will gather the necessary documentation — including medical records confirming diagnosis, employment history or work site records establishing exposure to Harbison-Walker products, and in some cases affidavits from co-workers or product identification evidence. The attorney submits the claim package to the trust administrator for review and payment determination under the applicable TDP criteria.

Claimants should be aware that many asbestos trusts operate with payment percentages applied to scheduled claim values, meaning that payments may represent a fraction of the base scheduled value depending on the trust’s current payment percentage. An attorney familiar with the Harbison-Walker trust can advise on current payment levels and any applicable litigation options that may exist alongside or separate from the trust claim process.

Statute of Limitations

The time allowed to file a claim — whether with the trust or through civil litigation — varies based on the claimant’s state of residence and the date of diagnosis. Because these deadlines can be strict, individuals who have received an asbestos-related diagnosis and have a work history involving Harbison-Walker refractories or facilities where these products were used should seek legal counsel promptly.

Summary

Harbison-Walker Refractories Company produced asbestos-containing refractory brick, plastic refractories, and castable compounds from the mid-twentieth century through 1978. These products were widely installed in steel blast furnaces, coke ovens, and industrial boilers across the Ohio River Valley and Great Lakes industrial corridor. Workers who installed, maintained, repaired, or demolished Harbison-Walker refractory linings — as well as those who worked in the vicinity of these operations — may have sustained significant asbestos exposure. The company is a confirmed trust fund defendant. The Harbison-Walker International Asbestos PI Trust is an active, funded mechanism for compensating individuals diagnosed with mesothelioma, lung cancer, asbestosis, or other asbestos-related diseases attributable to Harbison-Walker product exposure. Filing a trust claim requires legal representation and documentation of both diagnosis and exposure history. Workers and family members with relevant exposure histories are encouraged to consult an asbestos attorney to evaluate their eligibility before applicable filing deadlines expire.