{"operation":"document","citation":"P-84-015","title":"NTSB Safety Recommendation P-84-015","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1984-06-15","effective_on":"1984-06-15","summary":"THE NTSB RECOMMENDS THAT THE GAS RESEARCH INSTITUTE: CONDUCT RESEARCH AND DEVELOP GUIDELINES CONCERNING SAFE BENDING RADII FOR PLASTIC PIPE CONTAINING BUTT, SADDLE, AND SOCKET FUSIONS.","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-84-015.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-84-015.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-84-015","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-84-015","body":"NTSB safety recommendation P-84-015.\n\nTHE NTSB RECOMMENDS THAT THE GAS RESEARCH INSTITUTE: CONDUCT RESEARCH AND DEVELOP GUIDELINES CONCERNING SAFE BENDING RADII FOR PLASTIC PIPE CONTAINING BUTT, SADDLE, AND SOCKET FUSIONS.\n\nPriority: CLASS II\n\nOverall Status: Closed - Acceptable Action\n\nIssued Date: 1984-06-15\n\nAdopted Date: 1984-05-17\n\nOverall Date Closed: 1995-06-02\n\nSynopsis: ON JULY 12, 1983, NATURAL GAS ESCAPING UNDER 60 POUNDS PRESSURE FROM A CRACK IN A BUTT FUSION JOINT IN A 2-INCH PLASTIC GAS MAIN ENTERED AN APARTMENT BUILDING IN CLEAR LAKE, IOWA, EXPLODED, AN THEN BURNED. TWO INTERSTATE POWER COMPANY EMPLOYEES WERE INJURED, ONE APARTMENT BUILDING WAS DESTROYED, AND THE ADJACENT APARTMENT BUILDING WAS DAMAGED HEAVILY. DAMAGE WAS ESTIMATED AT MORE THAN $1 MILLION; NONE OF THE RESIDENTS WERE INJURED OR KILLED.\n\nProbable Cause: None\n\nNtsbnumber: DCA83MP022\n\nReport Number: PAR-84-02\n\nAddressee Name: Gas Research Institute\n\nAddressee Status: Closed - Acceptable Action\n\nAddressee Date Closed: 1995-06-02\n\nAddressee Acronym: GRI\n\nAddressee Organization Type: A-Associations\n\nCommunication Date: 1984-06-29\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: GRI LETTER: FOR THE PAST SEVERAL YEARS, GRI HAS BEEN SUPPORTING RESEARCH ON BUTT-FUSED, SOCKET-FUSED, AND SADDLE-FUSED JOINTS OF POLYETHYLENE GAS PIPES AND FITTINGS. SOME PRELIMINARY WORK HAS BEEN COMPLETED ON BENDING STRESSES INFUSED PIPE AND HAS INDICATED THAT THE POTENTIAL EXISTS TO DEVELOP GUIDELINES FOR BENDING RADII FOR FUSED JOINTS (SEE ATTACHMENT A). AS A RESULT OF YOUR RECOMMENDATIONS, THIS PROJECT WILL BE EXPANDED BEGINNING IN THE LAST QUARTER OF 1984 TO INCLUDE THE DETERMINATION OF ALLOWABLE LIMITS ON BENDING RADII. TECHNICAL DATA AND GUIDELINES WILL BE AVAILABLE BY THE END OF 1986 FOR INITIAL REVIEW BY THE INDUSTRY.\n\nAddressee Acronym: GRI\n\nAddressee Organization Type: A-Associations\n\nCommunication Date: 1995-04-10\n\nCommunication Type: Official Correspondence\n\nAddressee Acronym: GRI\n\nAddressee Organization Type: A-Associations\n\nCommunication Date: 1984-09-17\n\nCommunication Type: Official Correspondence\n\nAddressee Acronym: GRI\n\nAddressee Organization Type: A-Associations\n\nCommunication Date: 1995-06-02\n\nCommunication Type: Official Correspondence","truncated":false,"body_characters":2265}