# NTSB Safety Recommendation P-73-040

- **operation:** document
- **citation:** P-73-040
- **title:** NTSB Safety Recommendation P-73-040
- **source type:** guidance
- **agency:** National Transportation Safety Board
- **status:** guidance
- **official:** true
- **published on:** 1973-08-24
- **effective on:** 1973-08-24
- **summary:** THE NTSB RECOMMENDS THAT THE OFFICE OF PIPELINE SAFETY OF THE DEPARTMENT OF TRANSPORTATION: GIVE ADDITIONAL REGULATORY CONSIDERATION TO THE EFFECTS OF GRAPHITIZATION ON THE RESISTANCE OF CAST-IRON MAINS TO EXTERNAL LOADS. LOCALIZED AND GENERAL GRAPHITIZATION SHOULD BE DEFINED.
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- **source url:** https://data.ntsb.gov/carol-main-public/sr-details/P-73-040
**body:**

NTSB safety recommendation P-73-040.

THE NTSB RECOMMENDS THAT THE OFFICE OF PIPELINE SAFETY OF THE DEPARTMENT OF TRANSPORTATION: GIVE ADDITIONAL REGULATORY CONSIDERATION TO THE EFFECTS OF GRAPHITIZATION ON THE RESISTANCE OF CAST-IRON MAINS TO EXTERNAL LOADS. LOCALIZED AND GENERAL GRAPHITIZATION SHOULD BE DEFINED.

Priority: CLASS II

Overall Status: Closed - Acceptable Action

Issued Date: 1973-08-24

Adopted Date: 1973-08-16

Overall Date Closed: 1976-07-20

Synopsis: A GAS EXPLOSION OCCURRED ON AUGUST 31, 1972 IN THE ANNEX BUILDING OF AN ATLANTA, GA., HIGH SCHOOL. GAS HAD LEAKED INTO THE BUILDING FROM A CRACKED CAST-IRON MAIN LOCATED BENEATH THE STREET IN FRONT OF THE ANNEX. ATLANTA GAS LIGHT COMPANY (AGL) PERSONNEL ARRIVED AT THE LEAK SITE APPROXIMATELY 1 HOUR AFTER AGL WAS FIRST NOTIFIED OF THE LEAK AND APPROXIMATELY 1/2 HOUR BEFORE THE EXPLOSION. ONE PERSON DIED AND SEVEN OTHERS WERE INJURED AS A RESULT OF THE ACCIDENT.

Ntsbnumber: PLD72XR005

Report Number: PAR-73-03

Addressee Name: RSPA

Addressee Status: Closed - Acceptable Action

Addressee Date Closed: 1976-07-20
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