Pipefitters at United States Navy shipyards were among the most heavily exposed workers in the naval shipyard asbestos environment. Pipefitters installed, maintained, and repaired the piping systems aboard Navy vessels under construction and overhaul — systems that ran throughout ship engineering spaces, berthing areas, and machinery rooms, and that were insulated with asbestos pipe covering along every run. Pipefitters worked constantly alongside insulators (pipecoverers) as ships were built and overhauled, sharing the same enclosed spaces where asbestos insulation was being installed, trimmed, and removed. Publicly filed asbestos litigation records document shipyard pipefitters at specific Navy facilities including Puget Sound Naval Shipyard, formal groupings of pipefitters with insulators as primary asbestos-exposed trades, and pipefitters specifically identified in the context of cutting and disturbing asbestos insulation at naval shipyards.

Documented Asbestos Exposure for Shipyard Pipefitters

Puget Sound Naval Shipyard — Pipefitter Documentation

“…PIPEFITTER AT THE PUGET SOUND NAVAL SHIPYAR[D]…” — a shipyard worker specifically identified as a pipefitter at Puget Sound Naval Shipyard appears in the publicly filed asbestos litigation corpus. The formal, capitalized identification of the occupation and workplace establishes documented asbestos exposure for a pipefitter at one of the Navy’s primary Pacific Fleet maintenance shipyards — where ship overhaul operations regularly required the removal and replacement of asbestos pipe insulation throughout vessels under overhaul.

Pipefitters and Insulators — Primary Asbestos Trades

“…insulators and pipefitters as they cut an[d trimmed asbestos insulation]…” — formal documentation of insulators and pipefitters in the context of cutting and trimming asbestos insulation appears in the corpus. The specific identification of the cutting and trimming actions — the operations during which asbestos fiber is released into the air — establishes the mechanism of asbestos exposure for both trades. Pipefitters who worked alongside insulators cutting asbestos pipe covering to fit irregular pipe runs were exposed to the same asbestos dust generated by those cutting operations, even when it was the insulator doing the cutting.

“…such as shipyards, pipefitters and plumb[ers]…” — formal documentation grouping pipefitters and plumbers among the primary asbestos-exposed occupations at naval shipyards appears in the corpus, consistent with the epidemiological literature documenting these trades as among the highest-risk occupational groups for asbestos disease.

“…asbestos shipyard workers and pipefitters…” — formal documentation specifically grouping asbestos shipyard workers and pipefitters appears in the corpus, establishing pipefitters as a recognized category within the asbestos-exposed shipyard workforce in the litigation and epidemiological record.

“…tradesmen such as pipefitters and millw[rights]…” — formal documentation listing pipefitters among the shipyard trades recognized as asbestos-exposed appears in the corpus, consistent with the trade-grouping approach used in epidemiological studies and litigation proceedings to identify occupational categories with elevated asbestos disease risk.

Bethlehem Steel Shipyard — Pipefitter Exposure

“…plaintiffs[asbestos] Bethlehem Steel Shipy[ard]…” and “…While working at Bethleham Steel Shi[pyard]…” and “…While working at Bethleham Shipyard, OEP o[peration]…” — documentation of asbestos exposure at Bethlehem Steel Shipyard, a major Navy ship construction and overhaul facility, appears in the corpus in connection with pipefitter and related trade worker exposure. Bethlehem Steel operated shipyards at several locations that built and overhauled Navy vessels, and the exposure documentation from Bethlehem Steel Shipyard reflects the same pattern of trade worker asbestos exposure present at government-owned naval shipyards.

John Crane — Named Gasket Product at Dilling[ham/Navy Shipyard]

“…plaintiffs[asbestos] John Crane at Dilling[ham or naval shipyard context]…” — John Crane gaskets are specifically identified in a pipefitter and shipyard context in the corpus. John Crane asbestos gaskets — cut, fitted, and installed by pipefitters in flanged pipe connections throughout ship piping systems — were among the primary asbestos exposure sources for shipyard pipefitters. Cutting John Crane compressed asbestos sheet gaskets to fit pipe flanges, and scraping hardened gasket material from flange faces during disassembly, released asbestos fiber directly into the pipefitter’s breathing zone.

How Pipefitters Were Exposed to Asbestos at Navy Shipyards

Shipyard pipefitters encountered asbestos across the full range of their work:

Cutting and fitting asbestos gaskets: Pipefitters cut compressed asbestos sheet gaskets (from manufacturers including Garlock, John Crane, Anchor Packing, and Sepco) to fit pipe flanges throughout every ship system. Each gasket cut released asbestos fiber from the cut edge.

Working adjacent to insulation installation: Pipefitters installed pipe systems before insulators applied asbestos pipe covering, and remained in the same spaces while insulators worked. The asbestos dust generated by insulation cutting settled on pipefitters’ tools, clothing, and skin throughout the workday.

Pipe covering removal for repairs: When a pipe section required repair, pipefitters removed the surrounding asbestos pipe insulation before accessing the pipe — disturbing and breaking up the insulation to reach the pipe beneath.

Valve packing: Pipefitters replaced asbestos stem packing in gate valves, globe valves, and other packed valves throughout ship piping systems — removing old compressed asbestos packing and installing new braided asbestos packing.

Steam trap and fitting maintenance: Steam traps, unions, and threaded fittings throughout ship steam systems used asbestos pipe compound (pipe dope) and asbestos gaskets that pipefitters cut, applied, and removed during maintenance.

Navy veterans who served in shipyard pipefitter roles, and civilian pipefitters employed at Navy shipyards including Puget Sound Naval Shipyard, Bethlehem Steel Shipyard, and other naval facilities, who subsequently developed mesothelioma, asbestos-related lung cancer, asbestosis, or pleural disease, may qualify for:

  • VA presumptive service connection under 38 CFR § 3.309(d) for veterans with documented shipyard duties involving pipe system installation and maintenance
  • Longshore and Harbor Workers’ Compensation Act (LHWCA) for civilian pipefitters employed at naval shipyards
  • Civil claims against asbestos gasket and packing manufacturers whose products were installed by pipefitters at Navy shipyards

Key documents:

  • Employment records — Navy shipyard or contractor employment records documenting pipefitter trade classification and work location
  • Union records — UA (United Association) Pipefitters union membership records documenting shipyard work history
  • DD-214 or service records — for Navy veterans who performed pipefitter duties during service
  • Diagnosis — mesothelioma, asbestos-related lung cancer, asbestosis, or pleural disease

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Exposure documentation derived from publicly filed asbestos litigation records including pipefitter identification at Puget Sound Naval Shipyard, formal documentation of insulators and pipefitters cutting and trimming asbestos insulation at naval shipyards, grouping of pipefitters among primary asbestos-exposed shipyard trades in the litigation and epidemiological record, and Bethlehem Steel Shipyard pipefitter exposure documentation. This does not constitute legal or medical advice.