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Manufacturing
7 min read
Areas of Expertise :
Oil And Gas, Chemical Engineering, Explosions, Industrial Safety, Aboveground Storage Tanks
Published Date:
Last Modified Date:
Jurisdiction:
Texas State
On March 27, 2000, the East Dry Butadiene Tank ruptured at Phillips Petroleum Company’s K-Resin unit in Houston after weeks of unstable process conditions. The facility used 1,3-butadiene to produce K-Resin, a styrene-butadiene polymer. Operators had removed the tank from service after hearing popping sounds associated with polymer formation. Dry butadiene later entered or remained in the vessel while it was unchilled. The nitrogen purge was lost, and a closed downstream block valve isolated the tank’s pressure safety valve. Pressure eventually rose rapidly, the vessel failed, and released butadiene contributed to a fire that killed one person, severely injured several others, and caused lesser injuries to additional Phillips employees.
Workers and family members later brought negligence claims against Kellogg Brown & Root, Inc. and Halliburton Company based on engineering services Kellogg had performed for Phillips in 1995 and 1996. They alleged that Kellogg should have considered additional overpressure scenarios and recommended further safeguards for the dry-butadiene system. Chemical engineers Peter Howell and Georges Melhem submitted expert affidavits for the workers. The trial court entered a take-nothing summary judgment for Kellogg, and the Texas Fourteenth Court of Appeals affirmed in 2007. The appellate court concluded that Phillips’s actions before the rupture constituted a new and independent cause and that Kellogg’s earlier engineering work was too remote to establish proximate cause.
Kellogg provided engineering services associated with the K-Resin unit several years before the tank failure. The later lawsuit included a dispute over which scope-of-work documents governed Kellogg’s responsibilities and what tasks those documents required.
Operators heard popping sounds inside the East Dry Butadiene Tank and began preparations to empty and clean the vessel. The sounds were associated with popcorn polymer, which can develop when uninhibited butadiene reacts with itself. Nitrogen and drain connections were used during the shutdown and cleaning process.
An isolation-valve problem on March 4 allowed thousands of gallons of dry butadiene to flow back into the East Tank. A block valve downstream of the pressure safety valve was closed, leaving the vessel without its normal pressure-relief path. Operators later recorded tank pressure of about 70 to 75 psi, discovered that the nitrogen purge had been lost, and again heard popping from inside the vessel.
At about 1:22 p.m., pressure inside the East Tank increased rapidly and the vessel failed catastrophically. Butadiene escaped from the tank, additional flammable material was released from nearby equipment, and a fire followed. Phillips later attributed the vessel failure to overpressure associated with polymerization and dimerization in an isolated tank without adequate relief or cooling.
Phillips employees filed suit in Texas against Kellogg Brown & Root and other defendants. Their allegations against Kellogg centered on engineering work completed several years before the accident. They contended that Kellogg should have addressed additional overpressure conditions and recommended further controls for the dry-butadiene system.
Kellogg and Halliburton filed amended summary-judgment motions challenging the claims on several grounds, including duty and proximate cause. The workers opposed the motions with expert affidavits from chemical engineers Peter Howell and Georges Melhem. The trial court later struck substantial portions of those affidavits and entered a take-nothing summary judgment on the claims against Kellogg.
The Texas Fourteenth Court of Appeals affirmed the trial court’s ruling in Arguelles v. Kellogg Brown & Root, Inc., 222 S.W.3d 714. Although the parties disputed aspects of Kellogg’s earlier engineering assignment, the appellate court ultimately resolved the claims on causation. It concluded that Phillips’s conduct before the accident constituted a new and independent cause and that Kellogg’s 1995 and 1996 work was too remote to satisfy the legal standard for proximate cause. No petition for review followed the appellate decision.
Court:
Fourteenth Court of Appeals
Case Name:
Arguelles v. Kellogg Brown & Root, Inc.
A butadiene storage tank ruptured at Phillips Petroleum's Houston K-Resin unit in March 2000, causing a fire that killed one worker and injured several others.
The failure involved polymerization-related overpressure, loss of the nitrogen purge, inadequate cooling, and an isolated pressure-relief path.
Workers alleged that Kellogg Brown & Root failed to evaluate overpressure scenarios and recommend adequate safeguards during earlier engineering work.
Chemical engineering experts addressed pressure-relief design, vessel safety, and additional controls that could have reduced the risk of failure.
In 2007, the Texas Fourteenth Court of Appeals affirmed summary judgment for Kellogg, finding that Phillips's intervening conduct broke the chain of proximate causation.
Chemical Fires and Explosions
Chemical Reaction
Pressure Vessels
Process Engineering
Chemical Process Equipment
Industrial Accidents
Hazard Control
Safety Engineering
Petrochemical
Storage tanks
On March 27, 2000, the East Dry Butadiene Tank ruptured at Phillips Petroleum Company’s K-Resin unit in Houston after weeks of unstable process conditions. The facility used 1,3-butadiene to produce K-Resin, a styrene-butadiene polymer. Operators had removed the tank from service after hearing popping sounds associated with polymer formation. Dry butadiene later entered or remained in the vessel while it was unchilled. The nitrogen purge was lost, and a closed downstream block valve isolated the tank’s pressure safety valve. Pressure eventually rose rapidly, the vessel failed, and released butadiene contributed to a fire that killed one person, severely injured several others, and caused lesser injuries to additional Phillips employees.
Workers and family members later brought negligence claims against Kellogg Brown & Root, Inc. and Halliburton Company based on engineering services Kellogg had performed for Phillips in 1995 and 1996. They alleged that Kellogg should have considered additional overpressure scenarios and recommended further safeguards for the dry-butadiene system. Chemical engineers Peter Howell and Georges Melhem submitted expert affidavits for the workers. The trial court entered a take-nothing summary judgment for Kellogg, and the Texas Fourteenth Court of Appeals affirmed in 2007. The appellate court concluded that Phillips’s actions before the rupture constituted a new and independent cause and that Kellogg’s earlier engineering work was too remote to establish proximate cause.
Kellogg provided engineering services associated with the K-Resin unit several years before the tank failure. The later lawsuit included a dispute over which scope-of-work documents governed Kellogg’s responsibilities and what tasks those documents required.
Operators heard popping sounds inside the East Dry Butadiene Tank and began preparations to empty and clean the vessel. The sounds were associated with popcorn polymer, which can develop when uninhibited butadiene reacts with itself. Nitrogen and drain connections were used during the shutdown and cleaning process.
An isolation-valve problem on March 4 allowed thousands of gallons of dry butadiene to flow back into the East Tank. A block valve downstream of the pressure safety valve was closed, leaving the vessel without its normal pressure-relief path. Operators later recorded tank pressure of about 70 to 75 psi, discovered that the nitrogen purge had been lost, and again heard popping from inside the vessel.
At about 1:22 p.m., pressure inside the East Tank increased rapidly and the vessel failed catastrophically. Butadiene escaped from the tank, additional flammable material was released from nearby equipment, and a fire followed. Phillips later attributed the vessel failure to overpressure associated with polymerization and dimerization in an isolated tank without adequate relief or cooling.
Phillips employees filed suit in Texas against Kellogg Brown & Root and other defendants. Their allegations against Kellogg centered on engineering work completed several years before the accident. They contended that Kellogg should have addressed additional overpressure conditions and recommended further controls for the dry-butadiene system.
Kellogg and Halliburton filed amended summary-judgment motions challenging the claims on several grounds, including duty and proximate cause. The workers opposed the motions with expert affidavits from chemical engineers Peter Howell and Georges Melhem. The trial court later struck substantial portions of those affidavits and entered a take-nothing summary judgment on the claims against Kellogg.
The Texas Fourteenth Court of Appeals affirmed the trial court’s ruling in Arguelles v. Kellogg Brown & Root, Inc., 222 S.W.3d 714. Although the parties disputed aspects of Kellogg’s earlier engineering assignment, the appellate court ultimately resolved the claims on causation. It concluded that Phillips’s conduct before the accident constituted a new and independent cause and that Kellogg’s 1995 and 1996 work was too remote to satisfy the legal standard for proximate cause. No petition for review followed the appellate decision.
Chemical Engineering Expert Witnesses (Plaintiffs)
Peter Howell: Howell offered opinions on the overpressure scenarios Kellogg should have evaluated and the pressure-relief safeguards it should have recommended. His opinions addressed relief capacity, rupture disks, temperature and pressure alarms, automatic venting and pressure control, a quench system, oxygen monitoring, continuous oxygen purging, chemical seals, and other proposed controls for the dry-butadiene system.
Georges Melhem: Melhem, a chemical engineer, submitted an expert affidavit on behalf of the workers. The appellate court identified him as one of their chemical engineering experts, while its detailed technical discussion focused primarily on Howell’s opinions.
Fire and Explosions Investigations Expert Witness
An expert in fire and explosion investigation could evaluate the sequence of the tank rupture, release of flammable butadiene, ignition, fire development, and the relationship between the initial vessel failure and subsequent releases.
Chemicals Expert Witness
A chemicals expert could address the properties and behavior of 1,3-butadiene, including polymerization, heat generation, pressure buildup, chemical storage conditions, and safe handling practices.
Dry Butadiene Can Produce Heat and Rising Pressure
Once the inhibitor is removed from butadiene, the chemical can react with itself and form polymers. That reaction generates heat. As temperature increases, the reaction can accelerate and produce additional heat and pressure. In the East Tank, dry butadiene remained unchilled for an extended period while polymer activity continued. The vessel eventually experienced a rapid increase in pressure before it failed.
The Safety Valve Was Isolated From Its Relief Path
The East Tank had a pressure safety valve designed to open automatically at 85 psi. A downstream block valve, however, had been placed in the closed position. With that valve closed, the pressure safety valve could not discharge through its intended route. Phillips later determined that normal operation of the safety valve would have lowered pressure and provided cooling through evaporation.
Operators Detected Several Warning Conditions
The conditions inside the East Tank changed over the weeks preceding the rupture. Operators measured pressure of approximately 70 to 75 psi, found that the nitrogen purge had been lost, observed that liquid remained in the vessel, and heard popping associated with polymer formation. These conditions were present before the sudden rise in pressure on March 27.
The Court Examined the Scope of Kellogg’s Engineering Work
The parties disagreed over the scope of Kellogg’s 1995 and 1996 engineering assignment. The appellate court found a factual issue over whether Kellogg’s contractual duties included tasks described in two scope-of-work documents, including reviewing relieving conditions and recommending new pressure safety valve or rupture-disk specifications for problem valves. The court separately held that Kellogg did not owe several broader duties asserted by the workers, including a duty to design or redesign the pressure-relief system or recommend additional engineering controls. The claims were ultimately resolved on proximate cause.
The Court Distinguished Engineering Opinions From Causation
The workers identified additional measures that they argued could have reduced the risk of vessel failure. The court separately examined the operating decisions and process conditions at the Phillips facility before the rupture. Those conditions included an isolated pressure-relief path, unchilled dry butadiene, loss of the nitrogen purge, elevated pressure, and continuing signs of polymer activity. The appellate court determined that Phillips’s conduct constituted a new and independent cause, preventing the workers from establishing proximate cause against Kellogg.
The claims against Kellogg centered on engineering work completed in 1995 and 1996, several years before the East Dry Butadiene Tank failed. The workers argued that Kellogg should have evaluated additional overpressure scenarios and recommended further safeguards, and they supported their claims with affidavits from chemical engineers Peter Howell and Georges Melhem. The trial court entered a take-nothing summary judgment for Kellogg. In 2007, the Texas Fourteenth Court of Appeals affirmed, concluding that Phillips’s conduct before the rupture constituted a new and independent cause and that Kellogg’s earlier engineering work was too remote to establish proximate cause.
What engineering work did KBR perform before the explosion?
Kellogg performed engineering services for Phillips Petroleum’s K-Resin unit in 1995 and 1996, several years before the East Dry Butadiene Tank ruptured. The later lawsuit included a dispute over which scope-of-work documents applied and whether Kellogg was required to review certain relieving conditions or recommend new pressure safety valve or rupture-disk specifications for problem valves. The appellate court rejected several broader duties asserted by the workers and ultimately resolved the claims on causation.
Why did pressure build inside the butadiene tank?
Dry butadiene remained in the East Tank while the vessel was unchilled. Polymerization and dimerization generated heat, which increased reaction activity and pressure. The nitrogen purge was also lost, while the normal pressure-relief route was unavailable because a downstream block valve had been closed.
Why could the pressure safety valve not relieve the tank?
The pressure safety valve was designed to open automatically at 85 psi, but a closed block valve downstream prevented flow through the normal relief path. As pressure increased inside the vessel, the isolated configuration prevented the safety valve from discharging as intended.
What safeguards did Peter Howell say KBR should consider?
Chemical engineer Peter Howell offered opinions that Kellogg should have considered additional overpressure scenarios and safeguards for the dry-butadiene system. His proposed measures included greater pressure-relief capacity, a rupture disk suitable for polymerizing service, temperature and pressure alarms, automatic venting and pressure control, a quench system, oxygen monitoring, continuous oxygen purging, and chemical seals.
Why did the court reject the claims against Kellogg?
Chemical Engineering Expert Witnesses (Plaintiffs)
Peter Howell: Howell offered opinions on the overpressure scenarios Kellogg should have evaluated and the pressure-relief safeguards it should have recommended. His opinions addressed relief capacity, rupture disks, temperature and pressure alarms, automatic venting and pressure control, a quench system, oxygen monitoring, continuous oxygen purging, chemical seals, and other proposed controls for the dry-butadiene system.
Georges Melhem: Melhem, a chemical engineer, submitted an expert affidavit on behalf of the workers. The appellate court identified him as one of their chemical engineering experts, while its detailed technical discussion focused primarily on Howell’s opinions.
Fire and Explosions Investigations Expert Witness
An expert in fire and explosion investigation could evaluate the sequence of the tank rupture, release of flammable butadiene, ignition, fire development, and the relationship between the initial vessel failure and subsequent releases.
Chemicals Expert Witness
A chemicals expert could address the properties and behavior of 1,3-butadiene, including polymerization, heat generation, pressure buildup, chemical storage conditions, and safe handling practices.
Dry Butadiene Can Produce Heat and Rising Pressure
Once the inhibitor is removed from butadiene, the chemical can react with itself and form polymers. That reaction generates heat. As temperature increases, the reaction can accelerate and produce additional heat and pressure. In the East Tank, dry butadiene remained unchilled for an extended period while polymer activity continued. The vessel eventually experienced a rapid increase in pressure before it failed.
The Safety Valve Was Isolated From Its Relief Path
The East Tank had a pressure safety valve designed to open automatically at 85 psi. A downstream block valve, however, had been placed in the closed position. With that valve closed, the pressure safety valve could not discharge through its intended route. Phillips later determined that normal operation of the safety valve would have lowered pressure and provided cooling through evaporation.
Operators Detected Several Warning Conditions
The conditions inside the East Tank changed over the weeks preceding the rupture. Operators measured pressure of approximately 70 to 75 psi, found that the nitrogen purge had been lost, observed that liquid remained in the vessel, and heard popping associated with polymer formation. These conditions were present before the sudden rise in pressure on March 27.
The Court Examined the Scope of Kellogg’s Engineering Work
The parties disagreed over the scope of Kellogg’s 1995 and 1996 engineering assignment. The appellate court found a factual issue over whether Kellogg’s contractual duties included tasks described in two scope-of-work documents, including reviewing relieving conditions and recommending new pressure safety valve or rupture-disk specifications for problem valves. The court separately held that Kellogg did not owe several broader duties asserted by the workers, including a duty to design or redesign the pressure-relief system or recommend additional engineering controls. The claims were ultimately resolved on proximate cause.
The Court Distinguished Engineering Opinions From Causation
The workers identified additional measures that they argued could have reduced the risk of vessel failure. The court separately examined the operating decisions and process conditions at the Phillips facility before the rupture. Those conditions included an isolated pressure-relief path, unchilled dry butadiene, loss of the nitrogen purge, elevated pressure, and continuing signs of polymer activity. The appellate court determined that Phillips’s conduct constituted a new and independent cause, preventing the workers from establishing proximate cause against Kellogg.
The claims against Kellogg centered on engineering work completed in 1995 and 1996, several years before the East Dry Butadiene Tank failed. The workers argued that Kellogg should have evaluated additional overpressure scenarios and recommended further safeguards, and they supported their claims with affidavits from chemical engineers Peter Howell and Georges Melhem. The trial court entered a take-nothing summary judgment for Kellogg. In 2007, the Texas Fourteenth Court of Appeals affirmed, concluding that Phillips’s conduct before the rupture constituted a new and independent cause and that Kellogg’s earlier engineering work was too remote to establish proximate cause.
What engineering work did KBR perform before the explosion?
Kellogg performed engineering services for Phillips Petroleum’s K-Resin unit in 1995 and 1996, several years before the East Dry Butadiene Tank ruptured. The later lawsuit included a dispute over which scope-of-work documents applied and whether Kellogg was required to review certain relieving conditions or recommend new pressure safety valve or rupture-disk specifications for problem valves. The appellate court rejected several broader duties asserted by the workers and ultimately resolved the claims on causation.
Why did pressure build inside the butadiene tank?
Dry butadiene remained in the East Tank while the vessel was unchilled. Polymerization and dimerization generated heat, which increased reaction activity and pressure. The nitrogen purge was also lost, while the normal pressure-relief route was unavailable because a downstream block valve had been closed.
Why could the pressure safety valve not relieve the tank?
The pressure safety valve was designed to open automatically at 85 psi, but a closed block valve downstream prevented flow through the normal relief path. As pressure increased inside the vessel, the isolated configuration prevented the safety valve from discharging as intended.
What safeguards did Peter Howell say KBR should consider?
Chemical engineer Peter Howell offered opinions that Kellogg should have considered additional overpressure scenarios and safeguards for the dry-butadiene system. His proposed measures included greater pressure-relief capacity, a rupture disk suitable for polymerizing service, temperature and pressure alarms, automatic venting and pressure control, a quench system, oxygen monitoring, continuous oxygen purging, and chemical seals.
Why did the court reject the claims against Kellogg?
The appellate court examined the operating conditions and decisions at the Phillips facility before the accident. The pressure-relief path had been isolated, dry butadiene remained unchilled, the nitrogen purge was lost, and operators detected elevated pressure and polymer activity. The court concluded that Phillips’s conduct constituted a new and independent cause and that Kellogg’s earlier engineering work was too remote to establish proximate cause.
Chemical Fires and Explosions
Chemical Reaction
Pressure Vessels
Process Engineering
Chemical Process Equipment
Industrial Accidents
Hazard Control
Safety Engineering
Petrochemical
Storage tanks
Manufacturing
Manufacturing, +4
Manufacturing
Human Factors, +4
Manufacturing
The appellate court examined the operating conditions and decisions at the Phillips facility before the accident. The pressure-relief path had been isolated, dry butadiene remained unchilled, the nitrogen purge was lost, and operators detected elevated pressure and polymer activity. The court concluded that Phillips’s conduct constituted a new and independent cause and that Kellogg’s earlier engineering work was too remote to establish proximate cause.