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Safety Recommendation Details

Safety Recommendation P-73-050
Details
Synopsis: ON FEBRUARY 22, 1973, NATURAL GAS LIQUIDS LEAKED FROM A RUPTURED 10-INCH PIPELINE AT A PUMP STATION IN AUSTIN, TEXAS, FLOWED INTO DITCHES ALONGSIDE A ROAD ADJACENT TO THE STATION, AND VAPORIZED. A DODGE VAN DROVE INTO THE VAPOR-RICH ZONE AND STALLED. WHEN THE DRIVER ATTEMPTED TO RESTART THE ENGINE, THE VAPOR IGNITED, AND THE DRIVER AND SEVEN PASSENGERS WERE ENGULFED IN FLAMES. SIX OF THESE PERSONS DIED AND TWO WERE CRITICALLY BURNED.
Recommendation: THE NTSB RECOMMENDS THAT THE OFFICE OF PIPELINE SAFETY OF THE DEPARTMENT OF TRANSPORTATION: UNDERTAKE A STUDY OF THE EFFECTS OF PIPE STRESS CONCENTRATION CAUSED BY INPROPER WELD POSITIONING AND IMPROPER WELDING TECHNIQUES. BASED ON THE RESULTS OF THIS STUDY, INCORPORATED INTO 49 CFR 195 SPECIFICATIONS FOR PIPELINE REPAIR-WELDING PROCEDURES DESIGNED TO AVOID STRESS CONCENTRATIONS.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Unacceptable Action
Mode: Pipeline
Location: Austin, TX, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: 80284
Accident Reports:
Phillips Pipeline Company, Natural Gas Liquids Fire
Report #: PAR-73-04
Accident Date: 2/22/1973
Issue Date: 11/13/1973
Date Closed: 9/3/1985
Addressee(s) and Addressee Status: RSPA (Closed - Unacceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: RSPA
Date: 9/3/1985
Response:

From: RSPA
To: NTSB
Date: 3/21/1983
Response: RSPA LETTER: AS A RESULT OF MTB'S CONTINUING REVIEW OF THE EXISTING BODY OF REGULATIONS, RULEMAKING IS NOW UNDERWAY WHICH WILL ACOMPLISH RELATED, BUT HIGHER PRIORITY SAFETY OBJECTIVES ASSOCIATED WITH IMPROPER WELDING TECHNIQUES. THE RULEMAKING (ON NPRM) WOULD REQUIRE THE APPLICATION OF APPROPRIATE WELDING PROCEDURES, IN ACCORDANCE WITH SECTION 7 OF API 1104, TO MINIMIZE IMPROPER PIPELINE REPAIR WELDING TECHIQUES.

From: RSPA
To: NTSB
Date: 3/9/1976
Response: OPS WILL REEVALUATE THE APPROPRIATE SECTIONS OF THE REGULATIONS AND TAKE THE NECESSARY STEPS TO CLARIFY THE INTENT. 3/9/76 - STUDY TO BE COMPLETED IN 1977. 4/1/77 - ACTION PENDING AVAILABILITY OF OPSO RESOURCES.