NTSB Safety Recommendation P-83-036

NTSB safety recommendation P-83-036.

THE NTSB RECOMMENDS THAT THE EL PASO NATURAL GAS COMPANY: INSTALL EMERGENCY BLOWDOWN SYSTEM ACTIVATORS FOR COMPRESSOR PLANTS A AND B SO THAT THEY CAN BE OPERATED FROM AT LEAST TWO PLANT EXITS.

Priority: CLASS II

Overall Status: Closed - Acceptable Action

Issued Date: 1984-01-17

Adopted Date: 1983-12-12

Overall Date Closed: 1985-02-19

Synopsis: ON MAY 26, 1983, NATURAL GAS AT 815 POUNDS/SQUARE INCH GAGE (PSIG) BEGAN TO ESCAPE THROUGH A FAILED GASKET IN A COMPRESSOR AT THE EL PASO NATURAL GAS COMPANY'S BLANCO GASOLINE PLANT NEAR BLOOMFIELD, NEW MEXICO. THE COMPRESSOR STATION OPERATOR HEARD A LOUD NOISE, RAN TO THE VALVE MANIFOLD OUTSIDE THE COMPRESSOR BUILDING, AND TRIED TO SHUT OFF THE GAS SUPPLY TO COMPRESSOR NO. 14. ANOTHER EMPLOYEE, WHO ALSO HEARD THE NOISE, RAN INTO THE COMPRESSOR BUILDING AND TRIED TO SHUT DOWN THE COMPRESSOR ENGINE. BEFORE EITHER PERSON SUCCEEDED, THE ESCAPING GAS IGNITED, EXPLODED, AND BURNED. THE TWO EMPLOYEES WERE BURNED SEVERELY, ONE COMPRESSOR WAS DESTROYED, ANOTHER COMPRESSOR WAS DAMAGED, THE WINDOWS AND DOORS OF THE COMPRESSOR BUILDING WERE BLOWN OUT, AND OTHER STRUCTURAL DAMAGE RESULTED.

Probable Cause: The probable cause was the improper tightening of compressor head bolts, which caused a compressor head gasket to rupture and release natural gas that ignited; contributing factors were El Paso’s lack of proper bolt-tightening procedures and maintenance training, and inadequate emergency-procedure training that delayed blowdown and extended the emergency.

Ntsbnumber: DCA83MP019

Report Number: PAR-83-04

Addressee Name: El Paso Natural Gas Company

Addressee Status: Closed - Acceptable Action

Addressee Date Closed: 1985-02-19

Addressee Acronym: EPNG

Addressee Organization Type: P-Private Industry

Communication Date: 1984-03-02

Communication Type: Official Correspondence

Communication Contents: EL PASO NATURAL GAS COMPANY LETTER: EMERGENCY BLOWDOWN ACTIVATORS FOR COMPRESSOR PLANTS A & B AT BLANCO STATION WILL BE INSTALLED IN 1984. THEY WILL BE DESIGNED SO THEY CAN OPERATE FROM AT LEAST TWO PLANT EXITS.

Addressee Acronym: EPNG

Addressee Organization Type: P-Private Industry

Communication Date: 1984-09-06

Communication Type: Official Correspondence

Communication Contents: EL PASO LETTER: WITH RESPECT TO YOUR INQUIRY REGARDING INSTALLATION OF EMERGENCY BLOWDOWN ACTIVATORS FOR COMPRESSOR PLANTS A AND B, WE WOULD LIKE TO INFORM YOU THAT SUCH INSTALLATION IS APPROXIMATELY 65% PERCENT ACCOMPLISHED AND WILL BE COMPLETED DURING THE NEXT PLANT SHUTDOWN. SUBJECT TO LOAD DEMANDS, SUCH PLANT SHUTDOWN IS SCHEDULED TO OCCUR IN EARLY SEPTEMBER, 1984.

Addressee Acronym: EPNG

Addressee Organization Type: P-Private Industry

Communication Date: 1985-02-19

Communication Type: Official Correspondence

Addressee Acronym: EPNG

Addressee Organization Type: P-Private Industry

Communication Date: 1984-07-05

Communication Type: Official Correspondence