Act Now

If you worked at Sun Shipbuilding in Chester, Pennsylvania and have been diagnosed with mesothelioma, lung cancer, or asbestosis, you have a limited window to act. The federal statute of limitations for maritime asbestos claims is three years from diagnosis under 46 U.S.C. § 30106. Navy veterans may also qualify for presumptive VA disability benefits under 38 CFR § 3.309 — with no filing deadline. These remedies are not mutually exclusive. A maritime asbestos attorney can pursue your VA claim, trust fund submissions, and civil lawsuit simultaneously. Contact a Navy asbestos exposure lawsuit attorney today for a free, confidential case evaluation.

Sun Shipbuilding: A Half-Century of Tanker & Oiler Construction

Sun Shipbuilding & Dry Dock Company operated for roughly six decades along the Delaware River waterfront in Chester, Pennsylvania — approximately 15 miles southwest of Philadelphia. Founded in 1916 by the Sun Oil Company, the yard grew into one of the most productive shipbuilding facilities on the East Coast, reportedly employing tens of thousands of workers at its wartime peak.

What Sun Ship built and repaired:

  • Tankers, oilers, cargo ships, and naval auxiliaries
  • Fleet oilers and attack transports under U.S. Navy contracts during World War II
  • Civilian commercial tankers and oilers through the postwar decades — vessels carrying massive asbestos insulation loads throughout their hulls
  • Overhaul and repair programs throughout its operational history
  • Operations continued until the early 1980s

Why the timeline matters for current cases: Sun Shipbuilding operated from 1916 through the early 1980s. Workers hired as late as the 1970s reportedly sustained exposures that may only now be producing diagnosed disease. Mesothelioma carries a latency period of 20–50 years between first exposure and diagnosis. A worker who handled asbestos pipe covering or block insulation at Sun Ship in 1965 may receive a mesothelioma diagnosis today — and retain full legal rights to pursue a Navy asbestos exposure lawsuit or VA claim.

Who Was Exposed? High-Risk Trades at Sun Shipbuilding

Every trade working inside Sun Shipbuilding’s hulls during construction, overhaul, or repair was allegedly exposed to airborne asbestos fibers. Certain occupations carried substantially heavier exposure burdens.

Highest-exposure occupations:

  • Pipe laggers and heat/frost insulators — worked directly with asbestos pipe covering and block insulation, cutting, shaping, and securing materials in confined engine-room spaces; allegedly generated some of the highest sustained fiber concentrations found in any industrial setting
  • Pipefitters — installed and removed metal pipe systems while insulation was being applied or torn out during overhaul and repair
  • Boilermakers — installed, repaired, and replaced boiler systems packed with asbestos gaskets and refractory materials
  • Electricians — cut through asbestos-insulated conduit and worked in cable runs contaminated with asbestos dust
  • Welders and burners — torched through asbestos-insulated pipes and bulkheads, releasing fibers in the process
  • Painters and sheet metal workers — sanded and prepared asbestos transite surfaces before finishing
  • Carpenters and laborers — swept and shoveled accumulated asbestos debris, often without respiratory protection of any kind

Asbestos Products Allegedly Used at Sun Shipbuilding

Asbestos was reportedly used throughout Sun Shipbuilding operations wherever fire resistance, thermal insulation, and sound deadening were required aboard large steel vessels. On tankers and oilers, thermal demands were especially acute in engine rooms, boiler spaces, turbine casings, and miles of steam piping.

Asbestos-containing materials (ACMs) allegedly installed and disturbed at Sun Ship:

  • Pipe covering and block insulation for steam lines and boiler systems, including Johns-Manville products and Owens-Illinois Kaylo rigid pipe insulation
  • Asbestos cement (transite) board — including Johns-Manville transite and Gold Bond asbestos board — used in bulkheads and engine-room partitions
  • Refractory brick and boiler packing in furnace and boiler installations, allegedly supplied by Combustion Engineering and Babcock & Wilcox
  • Woven asbestos gaskets and valve packing in piping systems, reportedly manufactured by Crane Co. and Garlock Sealing Technologies
  • Spray-applied fireproofing including Monokote and Zonolite products applied to structural steel throughout vessel hulls
  • Deck tiles and adhesives throughout crew and machinery spaces, allegedly containing products from Armstrong World Industries and W.R. Grace

Manufacturers allegedly supplying these products to Sun Shipbuilding:

  • Johns-Manville — pipe covering, transite board, block insulation, gaskets
  • Owens-Illinois (Kaylo) — rigid pipe insulation and block products, extensively used in naval and commercial shipyard applications
  • Combustion Engineering — boiler systems and refractory materials
  • Babcock & Wilcox — boiler packing and refractory products
  • Armstrong World Industries — deck tiles and asbestos-containing flooring products
  • W.R. Grace — spray fireproofing and insulation products
  • Owens Corning — thermal insulation products
  • Crane Co. — gaskets, valve packing, and piping components
  • Garlock Sealing Technologies — mechanical seals and gasket materials

When Was Asbestos Exposure Highest at Sun Ship?

The work phase — not the calendar year alone — determined fiber concentration and disease risk.

New Construction Phase

New construction allegedly created sustained, high-level exposures in enclosed, poorly ventilated spaces below decks. Installing Kaylo block insulation, Johns-Manville pipe covering, and Gold Bond transite bulkheads during outfitting reportedly generated continuous fiber clouds in engine rooms and boiler spaces for months at a stretch as a single large tanker or oiler was completed.

Overhaul and Drydock Repair — Highest Instantaneous Risk

Overhaul and drydock repair is associated with the highest instantaneous fiber release. Aging insulation — including Johns-Manville, Kaylo, and Owens-Illinois products — broken apart and discarded to allow system repairs crumbled and aerosolized with minimal disturbance. Workers at Sun Ship conducting overhaul work from the 1950s through the late 1970s were allegedly exposed to fiber concentrations far exceeding any recognized safe threshold, long before enforceable respiratory protections were in place. Removal of Monokote spray fireproofing and Zonolite products during structural modernization released additional fiber loads into confined vessel spaces.

Routine Maintenance and Component Replacement

Valve replacement, gasket removal, and thermal-system repair exposed mechanics and engineers to asbestos from Crane Co. gaskets, Garlock seals, and Johns-Manville piping components on an ongoing basis throughout each vessel’s operational life.

Why Protections Were Inadequate: OSHA, EPA, and Manufacturer Liability

Pre-OSHA Era (Before 1970)

Before OSHA’s creation in 1970, no federal agency regulated occupational asbestos exposure at civilian shipyards, including Sun Ship. Workers were exposed without any legal requirement for respiratory protection, medical monitoring, or engineering controls. Manufacturers including Johns-Manville, Owens-Illinois, W.R. Grace, and Combustion Engineering are alleged to have possessed internal knowledge of asbestos toxicity decades before that knowledge was disclosed to workers or shipyard operators.

OSHA Enforcement (1970s–1980s)

OSHA’s initial permissible exposure limit for asbestos, adopted in the early 1970s, was later tightened substantially as scientific understanding of fiber toxicity developed. Enforcement resources at large industrial facilities like Sun Ship were reportedly limited in the program’s early years. Public litigation records suggest OSHA inspected Delaware Valley shipyard facilities during the 1970s and early 1980s. Workers and their attorneys have alleged that even when inspectors identified violations, vessel owners and prime contractors were slow to abate hazardous conditions.

EPA NESHAP Oversight

Under EPA’s National Emission Standards for Hazardous Air Pollutants (NESHAP), facilities demolishing or renovating structures containing asbestos were required to provide advance notification and follow specific work practice standards. The NESHAP program became operative after 1973, covering asbestos-containing product removal and waste disposal. EPA NESHAP notification records for the Chester, Pennsylvania area and the broader Delaware Valley industrial corridor are available through EPA Region 3.

Asbestos-Related Diseases: Latency, Diagnosis & Why Cases Continue to Emerge

Mesothelioma — The Hallmark Asbestos Disease

Mesothelioma is an aggressive cancer of the lung lining (pleural mesothelioma) or abdominal lining (peritoneal mesothelioma) caused almost exclusively by asbestos exposure.

  • Latency period: 20–50 years between first exposure and diagnosis
  • Timeline example: A worker who handled Johns-Manville pipe covering or Kaylo block insulation at Sun Ship in 1965 may receive a mesothelioma diagnosis in 2024 or beyond
  • Prognosis: Generally fatal within 12–24 months of diagnosis without aggressive intervention
  • Legal trigger: Diagnosis starts the three-year federal maritime clock under 46 U.S.C. § 30106 — do not wait

Lung Cancer and Asbestosis

Asbestos-associated lung cancer and asbestosis — progressive, irreversible scarring of lung tissue — follow similar latency patterns and are still being newly diagnosed in former Sun Ship workers decades after their last exposure. Workers present with these conditions from contact with spray-applied products like Monokote and Zonolite during overhaul work conducted as far back as the 1960s.

Pleural Plaques and Other Asbestos Markers

Workers exposed at Sun Ship may also present with pleural plaques, pleural thickening, or rounded atelectasis — non-malignant findings but definitive markers of significant asbestos exposure. These are frequently discovered incidentally on chest X-rays or CT scans and may signal elevated risk of future progression to mesothelioma or lung cancer. An attorney should be consulted at this stage, before a malignant diagnosis, to preserve evidence and document work history.

Why New Cases Continue to Emerge

Sun Shipbuilding closed only in the early 1980s, near the tail end of the peak asbestos era. New diagnoses among former workers, family members exposed through take-home fiber contamination on work clothing, and members of the surrounding Chester community are still being reported. Mesothelioma and asbestos-disease lawsuits originating from Sun Ship exposures continue to be filed in federal courts. National maritime asbestos firms represent diagnosed workers and their families in all 50 states — geography is not a barrier to bringing a claim.

Civilian shipyard workers diagnosed with mesothelioma, lung cancer, or asbestosis have several overlapping legal avenues. Navy veterans have additional federal entitlements. These remedies are not mutually exclusive — an experienced maritime asbestos attorney can and should pursue all available pathways simultaneously.

1. Federal Maritime Asbestos Lawsuit Against Product Manufacturers

Statute of Limitations: Three years from the date of diagnosis under federal admiralty law (46 U.S.C. § 30106). Consult a maritime asbestos attorney promptly — time is of the essence, and the applicable limitations period must be confirmed based on your specific facts.

Defendants your attorney can pursue:

  • Johns-Manville — pipe covering, insulation, transite, gaskets; one of the largest historical suppliers of shipyard asbestos products and a named defendant in thousands of maritime cases
  • Owens-Illinois (Kaylo) — rigid pipe insulation used extensively throughout Sun Ship’s tanker and oiler construction programs; Owens-Illinois has faced substantial asbestos liability in maritime courts
  • **Combustion Engineering and

For informational purposes only. Not legal advice. No attorney-client relationship is created by reading this page. © 2026 Rights Watch Media Group LLC — Disclaimer · Privacy · Terms · Copyright