Freeport LNG Explosion: PHMSA Fine, Restart, and Lawsuits

The Freeport LNG explosion happened at 11:28 a.m. on June 8, 2022, when a section of insulated piping at the export terminal on Quintana Island, Texas, ruptured and ignited because trapped liquefied natural gas had overheated behind an isolated pressure relief valve. No one was hurt, but the blast knocked one of the largest LNG export facilities in the United States offline for roughly eight months, rocked global gas markets already strained by the war in Ukraine, and triggered federal and state enforcement actions that took nearly three years to resolve.

What Happened on June 8, 2022

An 18-inch vacuum-insulated pipe failed catastrophically in what investigators classified as a Boiling Liquid Expanding Vapor Explosion, followed immediately by a vapor cloud deflagration. The initial rupture lasted about nine seconds and released roughly 10,570 pounds of methane gas along with two barrels of liquid LNG into the pipe rack area. The gas ignited almost immediately, and about half of the released methane burned in a visible fireball.¹

Debris from the first blast breached smaller nearby piping and started a secondary LNG pool fire in the pipe rack trench. Responders extinguished that fire with water monitors after about 45 minutes. An unignited LNG leak from damaged three-inch piping continued until about 5:25 p.m. The explosion damaged process piping, instrumentation, wiring, cable trays, and structural steel, but everything stayed within the fenced boundary of the facility. No offsite structures were damaged, and no one on-site or in the surrounding community was injured or killed.²¹

Why the Line Failed

An independent Root Cause Failure Analysis by IFO Group, approved by both PHMSA and FERC, traced the explosion to a chain of failures stretching back more than six weeks. On April 26, 2022, third-party contractors tested a pressure safety valve on the line involved in the incident. After the test, the valve’s inlet isolation was not reopened, which left the safety valve unable to function. Investigators identified this as the most likely point where the protective system was defeated.¹

On June 3, operators closed isolation valves that trapped LNG inside the pipe segment. With no functioning relief valve, the cryogenic liquid had nowhere to go as it warmed. By the morning of June 8, the temperature inside the line had climbed above roughly negative 107 degrees Fahrenheit and the pressure exceeded 717 psig. The line held for several more hours before failing.¹

Warnings appeared and went unrecognized. On June 6, an outside operator emailed a supervisor that piping connected to the affected line had moved significantly, fallen off its supports, and damaged a spring can. An engineer inspected the movement the following day and blamed a missing pipe support and a failed spring can, noting the pipe was visibly shaking. That engineer was reportedly unaware of the abnormal temperatures and pressures building inside the line. On the morning of June 8, contractors near the pipe rack reported hearing banging and other strange noises. An operator dispatched to investigate did not observe anything abnormal.¹

The joint federal investigation identified deeper systemic problems beyond the isolated valve. Temperature instruments installed in the pipe during commissioning had never been programmed to send alarms to the control room. Operating procedures allowed operators to isolate sections of LNG line routinely without adequate safeguards against rising pressure. The facility’s car-seal program for tracking valve positions was deficient, and management-of-change processes had not flagged the hazards introduced by procedural modifications.³

Operator fatigue from chronic understaffing was flagged as a probable contributor. In the first half of 2022, nearly 75 percent of operators worked at least 20 percent beyond their scheduled hours on 12-hour shifts, often picking up overtime on days off. More than 97 percent of employees reported working considerable overtime in the run-up to the incident. Investigators attributed some management decisions to what they called “hubris,” saying supervisors kept the terminal running rather than acknowledging operational problems in the days before the blast. The report also cited alarm fatigue from an excessive number of control room alarms, dead batteries in certain safety systems, and problems with the displays operators used to monitor the plant.⁴

A History of Safety Problems Before the Blast

The 2022 explosion followed a documented pattern. Between early 2015 and the blast, PHMSA had issued 11 enforcement actions against Freeport LNG and conducted six federal failure investigations, more than any other Gulf Coast LNG facility.⁵

In August 2019, months after the terminal began exporting LNG, a pipe failed when supercooled liquid was forced through it at more than ten times the pipe’s maximum rated pressure. That same month, a flange gasket failure caused a refrigerant leak. In 2020, an electrical fire broke out and the emergency response fell apart: the 911 call was routed to Houston, more than 60 miles away, and responding local firefighters could not find their way into the facility because there were not enough Freeport LNG personnel on hand to guide them. PHMSA issued a compliance action over that breakdown. In early 2022, the agency warned the company about inadequate procedures for its underground gas storage. A month before the explosion, a 100-gallon spill of triethylene glycol sent one employee to the hospital.⁵⁶

Federal and State Enforcement

Freeport LNG suspended operations immediately. On June 30, 2022, PHMSA issued a Notice of Proposed Safety Order, and by August 3 the agency and the company had signed a Consent Agreement and Order laying out the conditions for any restart. The order required Freeport LNG to obtain written approval from PHMSA’s Southwest Region Director before resuming normal operations, and mandated that an independent third party complete a Root Cause Failure Analysis within 90 days. The company also had to submit a comprehensive damage assessment plan, undergo independent evaluations of its operating procedures, control system inspection protocols, and personnel training, and develop a remedial work plan covering every identified deficiency.⁷

FERC separately required its own written authorization before any non-emergency restart, and the U.S. Coast Guard imposed waterway restrictions that remained in effect until January 23, 2023.²

The $1.5 Million PHMSA Fine

In November 2024, PHMSA issued a Notice of Probable Violation citing four specific safety rule breaches connected to the explosion. Each violation carried a proposed civil penalty of $385,200, totaling $1,540,800. The four violations were inadequate transfer procedures (no written procedures to prevent operators from unintentionally trapping LNG in a pipe segment); failure to monitor for hazards (temperature instruments never programmed to trigger alarms in the control room); failure to inspect and test relief valves (no one verified that the safety valve had been returned to service after the April 26, 2022 test); and inadequate training (personnel had not been trained to recognize and respond to abnormal operating conditions).

Freeport LNG’s general counsel signed a letter on January 17, 2025, agreeing to pay the fine and stating the company had already corrected the violations under the earlier PHMSA safety order. The penalty was paid in full by January 21, 2025, and PHMSA closed the case on April 9, 2025.⁸⁹¹⁰

Texas Air Pollution Penalties

The Texas Commission on Environmental Quality found that the June 8, 2022, event constituted an “excessive emissions event” lasting 5,912 hours, during which the facility released tens of thousands of pounds of carbon monoxide, nitrogen oxides, and volatile organic compounds through its flares. TCEQ assessed a penalty of $330,750 for unauthorized emissions in violation of the facility’s air permits.¹¹ A separate TCEQ action fined the company $152,173 for air pollution violations between 2019 and 2021, before the explosion.¹²

Shutdown and Phased Restart

The terminal’s three liquefaction trains came back online in stages during the first quarter of 2023, after months of repairs and federal reviews. FERC began issuing approvals on January 26, 2023, first authorizing the commissioning of LNG transfer piping and boil-off gas systems, then progressively clearing individual trains and loading operations. Trains 2 and 3 returned to full commercial operation in February. On March 8, 2023, FERC approved the restart of Train 1, the final unit, and the company described a conservative ramp-up to full three-train production over the following weeks.²¹³

The Market Impact

The explosion took roughly 2 billion cubic feet per day of LNG export capacity out of an already tight global gas market. Freeport LNG declared force majeure and canceled all cargoes through the end of June 2022. The timing mattered: Europe was scrambling to replace declining Russian pipeline gas after the full-scale invasion of Ukraine in February 2022, and international buyers were competing hard for every available cargo.¹⁴

U.S. natural gas prices whipsawed. Henry Hub front-month futures dropped $1.42, or 16 percent, on the day the shutdown was announced, as traders priced in the surplus of gas that could no longer be exported. Over the full year, Henry Hub front-month prices averaged $6.54 per million British thermal units, and historical volatility for U.S. wholesale natural gas reached 171 percent in February 2022, the highest level since at least 1994.¹⁵¹⁴

Lawsuits

Groups of insurers, including Allianz, Lloyd’s of London, Great Lakes Insurance SE, GuideOne National Insurance, and Tokio Marine America Insurance, filed two suits seeking a combined $1.3 billion in subrogation from the engineering and construction contractors who built the facility: Zachry Industrial, Chiyoda International Corporation, and CB&I. The insurers alleged the contractors had failed to install safeguards that would have alerted operators before the explosion. The cases ended up in U.S. Bankruptcy Court for the Southern District of Texas after Zachry Group filed for Chapter 11 protection in May 2024, a bankruptcy driven primarily by cost disputes on a separate LNG project, Golden Pass.¹⁶¹⁷

On November 21, 2024, Judge Marvin Isgur dismissed both insurer suits, ruling that risk-allocation provisions in the construction contracts, including a waiver of subrogation, stripped the insurers of standing. The insurers filed a notice of appeal on December 2, 2024.¹⁶

The Freeport LNG facility owners filed their own suit in April 2024 against the same joint-venture contractors, alleging that incorrectly installed electric motors had caused shutdowns and costly repairs. That case was also removed to bankruptcy court. In January 2025, Judge Isgur dismissed the owners’ claim for consequential damages with prejudice, finding the complaint failed to state a claim for gross negligence under Texas law and that a contractual waiver of consequential damages applied.¹⁸

Company Reforms and Where Things Stand Now

Freeport LNG committed to expanding its workforce by more than 30 percent to address the overtime and fatigue problems flagged by investigators. The company created new departments for training, operational excellence, and quality assurance, and launched a company-wide safety management initiative. It also overhauled its LNG storage and transfer procedures, control room alarm systems, valve testing processes, and operator training programs.⁴

The terminal has returned to full service, and PHMSA closed its safety order case on July 3, 2025.¹⁹ A previously approved fourth liquefaction train has not yet been built. In June 2025, the company requested a 40-month extension from FERC to push the construction deadline to December 1, 2031, citing the aftermath of the explosion and the need to finalize commercial agreements. FERC approved the extension in July 2025 with no public objections.²⁰

1
PHMSA. IFO Group Root Cause Failure Analysis Report
2
FERC. Freeport LNG Incident
3
PHMSA/FERC/USCG. Freeport LNG Incident and Regulatory Response Briefing
4
E&E News. Fatigue Contributed to Texas LNG Explosion, Probe Says
5
E&E News. LNG Plant Had History of Safety Issues Before Explosion
6
Facing South. Texas LNG Blast Underscores Risks to Nearby Communities
7
PHMSA. Consent Agreement and Order, CPF No. 4-2022-051-NOPSO
8
PHMSA. CPF 4-2024-033-NOPV Amended Proposed Compliance Order
9
E&E News. Texas LNG Plant Agrees to $1.5M Fine for Explosion
10
PHMSA. Enforcement Case 42024033NOPV
11
TCEQ. Docket No. 2023-1670-AIR-E
12
Westlaw/Reuters. Texas Fines Freeport LNG for Air Pollution Violations
13
PR Newswire. Freeport LNG Receives Regulatory Approval for Restart of Final Liquefaction Train
14
RBN Energy. Global Market Impacts of the Freeport LNG Outage
15
U.S. Energy Information Administration. U.S. Wholesale Natural Gas Price Volatility
16
Engineering News-Record. Insurers Appeal Court Dismissal of Suits Against Contractors in Texas LNG Explosion
17
Engineering News-Record. Zachry Details Big Texas LNG Project Woes in Suit Against Owners
18
GovInfo. FLNG Liquefaction LLC v. CB&I Inc. et al.
19
PHMSA. Enforcement Case 42022051NOPSO
20
Pipeline and Gas Journal. Freeport LNG Gets FERC Approval for Train 4 Extension Through 2031