Shipyard Pipe Covering — Asbestos Exposure Crosswalk
What This Equipment Is
A modern naval combatant or large merchant ship contains miles of insulated piping — steam, condensate, feedwater, hot service water, hot fuel oil, refrigeration, and process piping — routed through engineering spaces, machinery rooms, and habitability compartments. From the 1930s through the late 1970s, the dominant insulation products for that piping were asbestos-bearing, including specific Navy-specification formulations developed for shipboard use:
- Amosite pipe covering — brown asbestos (amphibole) insulation, specified by the U.S. Navy for its high mechanical strength on shipboard piping; aggressively friable when disturbed
- 85% Magnesia pipe covering — see Magnesia Pipe Covering
- Calcium silicate pipe covering — see Calcium Silicate Block (parallel product family)
- Asbestos cloth and tape — outer wrap, removable blanket covers
- Insulating cement — joints and fittings (see Insulating Cement)
Specific Navy brand families with documented asbestos content include Unibestos (Pittsburgh Corning), Kaylo (Owens-Illinois → Owens-Corning), various Johns-Manville products, Eagle-Picher amosite block and pipe covering, and others.
Why Shipyard Pipe Covering Was a Heavy-Exposure Product
Shipboard space is confined. Insulators worked in narrow engineering compartments, pipe chases, and overhead voids with limited ventilation. Asbestos fiber from cutting, fitting, mixing cement, and finishing accumulated in those tight spaces at far higher concentrations than would occur in open industrial settings.
Navy specifications drove specific asbestos use. The U.S. Navy specified asbestos insulation in shipboard installations into the 1970s through formal procurement documents. Many product identifications in Navy-veteran cases trace directly to these specifications.
Rip-out during refit and overhaul was massive. Major naval shipyards (Mare Island, Long Beach, Puget Sound, Norfolk, Charleston, Portsmouth, Philadelphia, Brooklyn) performed periodic overhauls that involved stripping and replacing insulation across entire engineering spaces. Both shipyard workers and ship’s company sailors performing PMS (preventive maintenance) and emergency repairs encountered legacy fiber continuously.
Decades of latency. Many of the Navy veterans now being diagnosed with mesothelioma served on ships built in the 1940s–1960s and discharged in the 1950s–1970s.
Manufacturers Named in Shipyard / Navy Insulation Litigation
- Johns-Manville — comprehensive product line under Navy specifications
- Pittsburgh Corning — Unibestos brand (heavy Navy use)
- Owens-Corning / Fibreboard — Kaylo brand (originated at Owens-Illinois)
- Owens-Illinois — original Kaylo manufacturer
- Eagle-Picher — amosite block and pipe covering
- Armstrong World Industries — calcium silicate
- Combustion Engineering — insulation products
- Foster Wheeler — boiler-system insulation
- Babcock & Wilcox — boiler-system insulation
Documented Product References
Images sourced from publicly available product-identification reference materials. Inclusion does not constitute a finding of liability against any company.
Trust Funds That May Apply
- Manville Personal Injury Settlement Trust
- Pittsburgh Corning Corporation Asbestos PI Trust (Unibestos)
- Owens-Corning / Fibreboard Asbestos PI Trust (Kaylo)
- Eagle-Picher Industries PI Settlement Trust
- Armstrong World Industries Asbestos PI Settlement Trust
- Combustion Engineering 524(g) Asbestos PI Trust
- Babcock & Wilcox Company Asbestos PI Trust
- Foster Wheeler related trusts
Trades and Service Roles Most Exposed at Shipyard Pipe Covering
Civilian shipyard: insulators (Heat & Frost), pipefitters, boilermakers, machinist mates, electricians, sheet-metal workers, riggers, painters working alongside insulators, demolition crews on decommissionings.
Navy ship’s company: machinist’s mates (MM), boiler technicians (BT), enginemen (EN), hull maintenance technicians (HT), pipefitters (PF), damage controlmen (DC), engineering officers, and ship’s company performing routine and emergency maintenance in engineering spaces.
Jobsites and Vessels in the Network Documenting Shipyard Pipe Covering
- Every U.S. Navy ship built 1930s–1970s, plus selected later vessels
- Major U.S. shipyards on both coasts and the Great Lakes
- Civilian-trade post-Navy work documented across the MesoWatch Navy site and the state-site network (Navy veterans who continued in civilian trades — see Navy veteran civilian crossover sections)
- See companion pages: Naval Boiler Products, Marine Gaskets, Ship Engine Room Insulation, Pipe Insulation
Compiled from publicly filed asbestos litigation, U.S. Navy and shipyard procurement records, NIOSH and OSHA reports, and industry-publication histories. Product and company references reflect what has been alleged or documented in publicly filed litigation. This page does not constitute a finding of liability against any company. Not legal advice; consult a licensed attorney about your specific situation. Navy veterans should also pursue VA service-connected disability benefits in addition to any civil litigation; VA claims and civil litigation can run in parallel.