The Mahan class consisted of 18 destroyers commissioned between 1936 and 1937 at Bath Iron Works, Bethlehem Steel Quincy, and other yards as part of the 1930s naval expansion program. Mahan-class destroyers were early WWII Pacific Fleet combatants, participating in the early Pacific engagements before many were lost in combat or transferred to secondary duty. These pre-WWII destroyers used high-pressure steam turbine propulsion with asbestos insulation throughout the engineering plant consistent with the 1930s-era naval construction standards, predating any asbestos phase-down in Navy specifications.

Pre-WWII Steam Plant Asbestos

Mahan-class destroyers used steam turbine propulsion with full asbestos insulation:

  • Boiler plant — Mahan-class destroyers used high-pressure boilers with asbestos lagging on exterior surfaces, asbestos refractory brick in combustion chambers, and asbestos rope and packing at boiler access points. The pre-WWII boiler plant design incorporated asbestos at every insulation point in the boiler room
  • Main steam piping — the main steam piping from the Mahan-class firerooms to the engineroom and auxiliary steam loads used asbestos magnesia pipe covering throughout the steam distribution system. The 1930s construction used asbestos insulation as the standard pipe covering material with no alternatives to asbestos in the specification
  • Engineering auxiliaries — steam-driven auxiliary machinery aboard pre-WWII destroyers used asbestos-containing gasket and packing materials as standard components in the rotating equipment maintenance cycle

Pre-WWII Construction Asbestos Standards

Pre-WWII Navy destroyers represented the highest asbestos content period in Navy engineering:

  • The 1930s Naval construction era predated any awareness of asbestos health hazards and specified asbestos as the sole insulation material for hot steam piping, boiler insulation, and pipe joint sealing in Navy destroyer construction — meaning there was no non-asbestos option in the construction specification

VA Claims for Mahan-Class Veterans

VA presumptive service connection under 38 CFR § 3.309(d) covers asbestos exposure aboard pre-WWII and WWII-era steam destroyers. Engineering ratings who served aboard Mahan-class or other 1930s-era destroyers and have since been diagnosed with mesothelioma, asbestosis, or asbestos-related lung cancer may qualify for VA disability benefits.

Product & Manufacturer Reference

The asbestos-containing products documented on U.S. Navy vessels and at shipyards are catalogued by manufacturer on AsbestosIndex. These records cross-reference which companies supplied which materials and to which facilities.

Pipe Covering & Block Insulation Thermal insulation applied to steam lines, valves, and equipment in engine rooms and fire rooms Marine Products Insulation, gaskets, and packing products specified for naval and commercial marine applications Boilers & Steam Equipment Boiler manufacturers and insulation products — central to the fire room exposure pathway Gaskets & Packing Sheet and ring gaskets used throughout piping flanges, valve bonnets, and pump housings Electrical Products Wire insulation, switchgear arc chutes, and panel liners used throughout electrical spaces Full Product Index Search all 200+ manufacturers and 1,500+ documented asbestos products on AsbestosIndex™

Navy Ratings Most Exposed to Asbestos Aboard Mahan-Class Destroyers

The U.S. Department of Veterans Affairs and the public asbestos litigation record document that the following Navy ratings worked routinely in spaces where ACM was installed, maintained, ripped out, and replaced:

VA Presumptive Benefits — No Filing Deadline

The U.S. Department of Veterans Affairs recognizes mesothelioma, asbestos-related lung cancer, asbestosis, and pleural disease as conditions presumed to be service-connected for Navy veterans with documented asbestos exposure under 38 CFR § 3.309(d). No statute of limitations applies to VA disability compensation claims.

Available benefits may include monthly disability compensation, Dependency & Indemnity Compensation (DIC) for surviving spouses, priority VA healthcare enrollment, and Special Monthly Compensation for severe cases. Parallel claims against the asbestos bankruptcy trust funds established by the manufacturers of these products do not reduce VA compensation.

How to file a VA disability claim: VA claims are filed directly with the U.S. Department of Veterans Affairs — not with a law firm. Start at VA.gov › Hazardous Materials Exposure, call 1‑800‑827‑1000, or get free help filing from a Veterans Service Organization: DAV, VFW, or American Legion.

VA Claims Guide on This Site › Compare: VA vs. Civil Lawsuit

Source notes: equipment-manifest entries (where shown) are sourced from public-record BUSHIPS (Bureau of Ships) documentation, NARA archives, and the public asbestos litigation record. Manufacturer attributions link to documented asbestos-product histories on AsbestosIndex.com where available. Nothing on this page constitutes medical or legal advice.