Pressure vessels — boilers, reactors, heat exchangers, storage tanks, and process drums — are the critical containment systems at the heart of every refinery, chemical plant, and industrial facility. These vessels operate under enormous internal pressures and temperatures, holding back explosive, toxic, and corrosive materials that would be instantly lethal if released uncontrolled. When a pressure vessel fails, the stored energy is released in a catastrophic burst — a blast wave that can hurl vessel fragments hundreds of yards, a release of superheated steam or chemicals that scalds and poisons everyone nearby, and in many cases a subsequent fire or explosion that compounds the devastation. McFarlane Law represents Texas workers and community members injured by pressure vessel failures at industrial facilities.
Types of Pressure Vessel Failures
Pressure vessels fail through several mechanisms, each producing distinct hazard profiles. Brittle fracture occurs when vessel steel that has become embrittled — by cold temperatures, hydrogen exposure, or aging — cracks catastrophically under normal operating pressure, releasing the entire contents instantaneously. Fatigue failure results from cyclic stress — repeated pressurization and depressurization, thermal cycling, or vibration — that propagates cracks through the vessel wall over time until the remaining wall thickness can no longer contain the pressure. Corrosion failure occurs when chemical attack thins the vessel wall below the minimum required thickness. Creep failure happens in high-temperature service when the vessel metal slowly deforms under sustained stress until it ruptures. Overpressure failure occurs when internal pressure exceeds the vessel’s design limits — due to blocked outlets, runaway reactions, external fire exposure, or relief system failure. BLEVEs (boiling liquid expanding vapor explosions) represent the most devastating pressure vessel failure mode: when fire heats a vessel containing pressurized liquid, the liquid boils and the internal pressure rises while the vessel wall weakens from the heat, until the vessel fails catastrophically, releasing a massive expanding cloud of flammable vapor that ignites in a fireball potentially hundreds of feet in diameter.
Regulatory Requirements for Pressure Vessel Safety
Pressure vessels are subject to extensive design, fabrication, inspection, and maintenance requirements. The ASME Boiler and Pressure Vessel Code establishes minimum design and fabrication standards for pressure vessels, including material specifications, design calculations, welding procedures, and quality assurance requirements. OSHA’s Process Safety Management standard requires facilities to maintain written procedures for the safe operation of process equipment including pressure vessels, and mandates mechanical integrity programs that ensure vessels are inspected, tested, and maintained to prevent failures. The National Board Inspection Code (NBIC) provides standards for in-service inspection and repair of pressure vessels. API (American Petroleum Institute) standards including API 510 (Pressure Vessel Inspection Code) and API 579 (Fitness-for-Service) establish inspection intervals, examination methods, and evaluation criteria for pressure vessels in petroleum and chemical service. Despite this regulatory framework, pressure vessel failures continue to occur because operators defer inspections, ignore inspection findings, fail to replace degraded vessels, or operate vessels beyond their design parameters.
Catastrophic Injuries From Pressure Vessel Failures
Pressure vessel failures produce some of the most severe injuries in industrial settings. The blast wave from a vessel rupture can cause fatal blunt trauma at close range, throwing workers against structures or equipment with lethal force. Vessel fragments — which can weigh hundreds of pounds and travel at hundreds of miles per hour — are devastating projectiles that cause traumatic amputations, penetrating injuries, and crush injuries. The release of high-pressure steam causes flash steam burns that penetrate clothing and produce deep, extensive burns across large body surface areas. Chemical releases during vessel failures expose workers to concentrated toxic substances — acids, caustics, reactive chemicals — that cause severe chemical burns, respiratory injury, and systemic poisoning. Workers who survive the initial blast often suffer from multiple simultaneous injury mechanisms: blast injuries, fragment wounds, burns, chemical exposure, and blunt trauma from being thrown or struck by debris. The combination of multiple severe injuries significantly increases mortality risk and complicates medical treatment. Long-term consequences include permanent disability, chronic pain, PTSD, and reduced life expectancy.
Investigating Pressure Vessel Failure Claims
McFarlane Law’s approach to pressure vessel failure cases combines engineering investigation with regulatory analysis. We retain metallurgical engineers who examine the failed vessel using fractography, chemical analysis, and mechanical testing to determine the failure mechanism — whether the vessel failed from corrosion, fatigue, brittle fracture, overpressure, or a manufacturing defect. We obtain the vessel’s complete history: original design calculations, fabrication records, inspection reports from every scheduled examination, repair records, operating logs, and any fitness-for-service evaluations. We compare the actual inspection and maintenance history against the requirements of OSHA PSM, API 510, and the facility’s own mechanical integrity program to identify where the system failed. When the vessel itself was defective — manufactured with substandard materials, improper welding, or design errors — we pursue product liability claims against the manufacturer. When inspection or maintenance failures allowed a degrading vessel to remain in service, we pursue negligence claims against the facility operator and any third-party inspection firms involved. Contact McFarlane Law at (512) 222-4900 or (432) 803-5000.
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