# NTSB Safety Recommendation P-79-028

- **operation:** document
- **citation:** P-79-028
- **title:** NTSB Safety Recommendation P-79-028
- **source type:** guidance
- **agency:** National Transportation Safety Board
- **status:** guidance
- **official:** true
- **published on:** 1979-10-04
- **effective on:** 1979-10-04
- **summary:** THE NTSB RECOMMENDS THAT THE LONE STAR GAS COMPANY: DETERMINE THROUGH SAMPLE INSPECTIONS, THE EXTENT OF THE PROBLEM OF CIRCUMFERENTIAL CRACKING ON ITS SERVICE LINE/GAS MAIN CONNECTIONS SIMILAR TO THAT AT THE ACCIDENT LOCATIONS. TAKE APPROPRIATE ACTION TO REDUCE THE PROBABILITY OF THE RECURRENCE OF SIMILAR ACCIDENTS. (URGENT)
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- **source url:** https://data.ntsb.gov/carol-main-public/sr-details/P-79-028
**body:**

NTSB safety recommendation P-79-028.

THE NTSB RECOMMENDS THAT THE LONE STAR GAS COMPANY: DETERMINE THROUGH SAMPLE INSPECTIONS, THE EXTENT OF THE PROBLEM OF CIRCUMFERENTIAL CRACKING ON ITS SERVICE LINE/GAS MAIN CONNECTIONS SIMILAR TO THAT AT THE ACCIDENT LOCATIONS. TAKE APPROPRIATE ACTION TO REDUCE THE PROBABILITY OF THE RECURRENCE OF SIMILAR ACCIDENTS. (URGENT)

Priority: CLASS I

Overall Status: Closed - Acceptable Action

Issued Date: 1979-10-04

Adopted Date: 1979-10-04

Overall Date Closed: 1980-05-05

Synopsis: ON JANUARY 19, 1979, IN NORTH RICHLAND HILLS, TEXAS AN ACCUMULATION OF NATURAL GAS IN A HOUSE WAS IGNITED BY AN UNKNOWN SOURCE. THE RESULTING EXPLOSION AND FIRE DESTROYED THE HOUSE. ONE RESIDENT WAS KILLED AND ANOTHER WAS CRITICALLY INJURED.

Ntsbnumber: FTW79FP004

Report Number: PAR-72-3

Addressee Name: Lone Star Gas Company

Addressee Status: Closed--No Longer Applicable

Addressee Date Closed: 1980-05-05

Addressee Organization Type: P-Private Industry

Communication Date: 1980-03-05

Communication Type: Official Correspondence

Communication Contents: LONE STAR GAS COMPANY LTR: THREE HUNDRED AND TWENTY-EIGHT (328) RANDOM SAMPLE INSPECTIONS OF SWING-JOINT AND MAIN CONNECTIONS WERE MADE IN ARLINGTON AND NORTH RICHLAND HILLS. NO IMMEDIATE DANGER WITH THESE CONNECTIONS WAS FOUND. THERE WERE NO INDICATIONS OF CIRCUMFERENTIAL STRESS CRACKING PROBLEMS AT THE CONNECTIONS OR ON THE THREADS. NO SWING-JOINT OR MAIN CONNECTION WAS FOUND TO BE IN EXCESSIVE STRAIN WHICH WOULD CAUSE CIRCUMFERENTIAL CRACKING AT ANY OF THE THREADED CONNECTIONS. LONE STAR ALSO REVIEWED LEAK REPAIR ORDERS INVOLVING SERVICE LINE REPLACEMENTS, SWING-JOINT, AND SERVICE TAP CONNECTIONS FOR INSTANCES OF MATERIAL FAILURE DUE TO SOIL MOVEMENT AND STRESS CRACKING AT THREADED CONNECTIONS. THE REVIEW REVEALED NO INSTANCES OF CIRCUMFERENTIAL CRACKING AT SERVICE LINE/GAS MAIN CONNECTIONS. LONE STAR WILL TAKE NO FURTHER ACTION.

Addressee Organization Type: P-Private Industry

Communication Date: 1980-05-05

Communication Type: Official Correspondence
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