Guidanceguidance
P-76-019
NTSB Safety Recommendation P-76-019
Current as of 1976-02-08 Government source
RegulusPipeline researchRegulusPipeline researchP-76-019
NTSB safety recommendation P-76-019.
TRAIN EMPLOYEES WHO WILL INSTALL COMPRESSION COUPLINGS UNDER THE STANDARDS DEVELOPED AND MONITOR THEIR PERFORMANCE BY INSPECTING THEIR WORK. (URGENT)
Priority: CLASS I
Overall Status: Closed--No Longer Applicable
Issued Date: 1976-02-08
Adopted Date: 1976-04-29
Overall Date Closed: 1983-01-27
Synopsis: ON FEBRUARY 8, 1976, A HOUSE IN PHOENIX, ARIZONA, EXPLODED AND BURNED. OF TWO PERSONS WHO WERE HOSPITALIZED AS A RESULT OF THE ACCIDENT, ONE DIED.
Probable Cause: The National Transportation Safety Board's investigation of this accident disclosed that the natural gas at 39-psig pressure had leaked from the compression coupled connection of a 2-inch pipe appeared to have been inserted insufficiently through the gasket and into the coupling. Gas which leaked from this joint was trapped from above by heavily compacted soil; it consequently seeped into the house, where it was ignited by an unknown source. The 2-inch plastic pipe, which was installed in 1968 by the Arizona Public Service Company, was damaged by an excavator in 1969. The gas company repaired the leak by installing a 6-inch-ling compression coupling to connect each end of the severed 2-inch plastic pipe. The repaired section was wrapped with tape which extended 3 to 4 inches over the pipe on each side of the coupling.
Ntsbnumber: DCA76FP015
Report Number: None
Addressee Name: Arizona Public Service Company
Addressee Status: Closed--No Longer Applicable
Addressee Date Closed: 1983-01-27
Addressee Acronym: APS
Addressee Organization Type: P-Private Industry
Communication Date: 1982-11-12
Communication Type: Official Correspondence
Communication Contents: ARIZONA PUBLIC SERVICE COMPANY LTR: ALL EXISTING LOCATIONS OF THE SUBJECT COUPLINGS ARE PERIODICALLY LEAK SURVEYED PURSUANT TO THE GUIDELINES ESTABLISHED BY THE NTSB.
Addressee Acronym: APS
Addressee Organization Type: P-Private Industry
Communication Date: 1982-10-05
Communication Type: Official Correspondence
Addressee Acronym: APS
Addressee Organization Type: P-Private Industry
Communication Date: 1983-01-27
Communication Type: Official Correspondence
This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.