Ucar Block / Unibestos Pipe Covering (Pittsburgh Corning)

Product Description

Ucar Block and Unibestos pipe covering were thermal insulation products manufactured by Pittsburgh Corning Corporation between approximately 1962 and 1972. Pittsburgh Corning was a joint venture formed by PPG Industries and Corning Glass Works, and the company became one of the more prominent producers of industrial insulation materials during the mid-twentieth century building and manufacturing boom.

These products were designed specifically for high-temperature pipe insulation applications in industrial environments. Ucar Block and Unibestos pipe covering were marketed to facilities requiring durable, heat-resistant insulation capable of withstanding the demands of industrial piping systems, including those found in power generation plants, chemical processing facilities, refineries, and heavy manufacturing operations. The products were fabricated as rigid or semi-rigid block and sectional pipe covering units, shaped to conform to pipe surfaces and then secured in place during installation.

Pittsburgh Corning’s insulation line, including the Unibestos brand, was widely distributed throughout the United States during its decade of production. The Unibestos name itself became associated with the company’s asbestos-containing insulation products and has since appeared extensively in asbestos litigation and trust fund documentation. Pittsburgh Corning eventually filed for Chapter 11 bankruptcy protection in 2000, a filing directly attributable to the volume of asbestos-related personal injury claims the company faced, which led to the establishment of the trust fund that now compensates eligible claimants.

Asbestos Content

Ucar Block and Unibestos pipe covering products contained chrysotile asbestos as a primary component of their composition. Chrysotile, sometimes referred to as white asbestos, is a serpentine mineral fiber that was widely used in insulation manufacturing because of its heat resistance, tensile strength, and binding properties. In rigid and sectional pipe insulation products of this era, chrysotile fibers were commonly combined with other binding and filler materials to create a cohesive insulating matrix capable of maintaining structural integrity under thermal stress.

The presence of asbestos in these products served a functional purpose during their manufacture and service life — the fibers contributed to both the thermal performance and the mechanical durability of the insulation. However, this same fibrous composition created a significant and well-documented health hazard when the material was disturbed, cut, shaped, or degraded.

Under standards established by the Asbestos Hazard Emergency Response Act (AHERA) and regulations promulgated by the Occupational Safety and Health Administration (OSHA), chrysotile asbestos is classified as a known human carcinogen. Inhalation of chrysotile fibers has been causally associated with mesothelioma, asbestosis, lung cancer, and other serious pulmonary diseases. OSHA’s permissible exposure limit for asbestos reflects the recognition that no safe threshold of occupational exposure has been established for asbestos fiber inhalation.

How Workers Were Exposed

Industrial workers across a range of occupational roles were exposed to airborne asbestos fibers released from Ucar Block and Unibestos pipe covering during both the installation and removal phases of the product’s service life. Because these products were rigid insulation materials applied directly to industrial piping systems, they required cutting, sawing, fitting, and shaping during initial installation — all activities that generated significant quantities of asbestos-containing dust.

Workers who applied the insulation, secured it in place, or worked in proximity to those performing these tasks were at risk of inhaling released fibers. In industrial settings, multiple trades and job classifications often worked simultaneously in confined areas, meaning that even workers not directly handling the insulation could receive substantial fiber exposures through ambient air contamination.

Maintenance and repair operations introduced additional exposure risks over the product’s service life. When existing Unibestos or Ucar Block insulation needed to be inspected, repaired, or replaced, the removal process disturbed the aging and often friable material, releasing concentrated amounts of asbestos dust. Insulation that had been subjected to years of thermal cycling, mechanical vibration, or physical damage was particularly prone to releasing fibers during disturbance.

Industrial workers employed in facilities such as power plants, petrochemical refineries, steel mills, paper mills, and similar heavy industry sites represent the primary population documented as having been exposed to Pittsburgh Corning’s Unibestos and related products. Workers in these settings often encountered asbestos-containing insulation materials from multiple manufacturers throughout their careers, compounding cumulative exposure levels. The latency period for asbestos-related diseases — frequently spanning twenty to fifty years from initial exposure — means that individuals exposed during the 1962–1972 production window may be receiving diagnoses of related illnesses in the present day.

Documented Trust Fund / Legal Options

Pittsburgh Corning Corporation filed for Chapter 11 bankruptcy protection in April 2000. The company’s reorganization plan, confirmed after extensive litigation and negotiation, established the Pittsburgh Corning Corporation Asbestos PI Trust to compensate individuals who sustained personal injuries as a result of exposure to Pittsburgh Corning asbestos-containing products, including Ucar Block and Unibestos pipe covering.

The Pittsburgh Corning Corporation Asbestos PI Trust is a Tier 1 trust fund resource, meaning that individuals who can document exposure to these specific products and who have received a qualifying asbestos-related diagnosis may be eligible to file claims directly with the trust rather than pursuing litigation through the civil court system. The trust operates under established Trust Distribution Procedures that define eligibility requirements, claim categories, and payment schedules.

Eligible claim categories recognized by the Pittsburgh Corning trust generally include mesothelioma, lung cancer with qualifying asbestos exposure history, other asbestos-related cancers, asbestosis, and other nonmalignant asbestos-related conditions. The applicable claim category and associated payment level are determined by the specific diagnosis and the supporting medical and occupational documentation submitted with each claim.

To file a claim with the Pittsburgh Corning Corporation Asbestos PI Trust, claimants or their legal representatives are typically required to provide medical documentation confirming a qualifying diagnosis, occupational history demonstrating exposure to Pittsburgh Corning products such as Unibestos or Ucar Block, and product identification evidence linking the claimant to the specific product and manufacturer. Employment records, coworker affidavits, union records, and facility work histories are among the types of documentation that can support product identification in trust fund submissions.

Individuals diagnosed with mesothelioma or other asbestos-related illnesses who have a documented work history in industrial settings where Pittsburgh Corning products were used should consult with an attorney experienced in asbestos trust fund claims. Because claimants may have been exposed to asbestos-containing products from multiple manufacturers over the course of their careers, it is common for eligible individuals to file claims with more than one asbestos trust simultaneously. Legal counsel can assist in identifying all applicable trusts and coordinating the documentation required for each filing.