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Inspection Detail
Inspection: 640144 - Phillips Petroleum Company - Tioga Gas Plant
Inspection Information - Office: Bismarck Area Office
Site Address:
Phillips Petroleum Company - Tioga Gas Plant
One Mile East Of Tioga
Tioga, ND 58852
Mailing Address:
P. O. Box 549, Tioga, ND 58852
Union Status: NonUnion
SIC:2911
NAICS: 0
Inspection Type: Accident
Scope: Partial
Advanced Notice: Y
Ownership: Private
Safety/Health: Safety
Close Conference: 11/28/1985
Emphasis:
Case Closed: 07/14/1986
| Type | Activity Nr | Safety | Health |
|---|---|---|---|
| Accident | 360633523 |
| Violations/Penalties | Serious | Willful | Repeat | Other | Unclass | Total |
|---|---|---|---|---|---|---|
| Initial Violations | 2 | 2 | ||||
| Current Violations | 2 | 2 | ||||
| Initial Penalty | $1,280 | $0 | $0 | $0 | $0 | $1,280 |
| Current Penalty | $1,280 | $0 | $0 | $0 | $0 | $1,280 |
| FTA Penalty | $0 | $0 | $0 | $0 | $0 | $0 |
| # | Citation ID | Citaton Type | Standard Cited | Issuance Date | Abatement Due Date | Current Penalty | Initial Penalty | FTA Penalty | Contest | Latest Event | Note |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 01001 | Serious | 5A0001 | 01/17/1986 | 01/24/1986 | $640 | $640 | $0 | - | ||
| 2. | 01002 | Serious | 5A0001 | 01/17/1986 | 06/23/1986 | $640 | $640 | $0 | - |
Investigation Summary
An unfired pressure vessel with a 6,500 gallon liquid capacity, which was designed and manufactured to be used for propane gas storage, was being used at this natural gas processing refinery as an accumulator. The tank was subjected to forces greater than those for which it was designed, and it developed severe stress cracks. The tank, operating at approximately 250 psi, failed and exploded. Large quantities of flammable vapors from liquid hydrocarbons were released and ignited, causing a second explosion. Employee #1 was killed by the explosion. A large portion of the refinery was destroyed.
Keywords: FLAMMABLE VAPORS, PRESSURE VESSEL, WORK RULES, FIRE, NATURAL GAS, EQUIPMENT FAILURE, EXPLOSION, HIGH PRESSURE, REFINERY
| # | Inspection | Age | Sex | Degree of Injury | Nature of Injury | Occupation |
|---|---|---|---|---|---|---|
| 1 | 640144 | Fatality | Other | Occupation not reported |