Mechanical Fitting Failure Data from Gas Distribution Operators (2011-2021)

Published by Pipeline and Hazardous Materials Safety Administration | Department of Transportation | Metadata Last Checked: December 12, 2025 | Last Modified: 2025-12-11

Mechanical Fitting Failure (MFF) reports from Gas Distribution Operators are no longer required by PHMSA. Zip file include 2011-2021 submissions. While individual MFF reports are no longer required, the Gas Distribution Annual Report form PHMSA F-7100.1-1 includes a count of mechanical joint failures resulting in a hazardous leak starting with calendar year 2021 reports.

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Complete Metadata

agencyDataSeriesURL	https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/data_statistics/pipeline/mechanical_fitting_failures_2011_present.zip
agencyProgramURL	https://www.phmsa.dot.gov/data-and-statistics/pipeline/mechanical-fitting-failure-data-gas-distribution-operators
analysisUnit	Annual Report information from pipeline operators
bureauCode	[ "021:50" ]
categoryDesignation	Administrative
collectionInstrument	Transportation
dataQuality	true
identifier	33.1
isPartOf	DOT-33
issued	2000-03-15
landingPage	https://data.transportation.gov/d/rdxy-82ey
language	[ "en-US" ]
phone	202-366-1878
primaryITInvestmentUII	021-339943484
programCode	[ "021:044" ]
references	[ "https://www.phmsa.dot.gov/data-and-statistics/pipeline/mechanical-fitting-failure-data-gas-distribution-operators" ]
spatial	Operator-specifc
temporal	R/1970-01-01/P1Y
theme	[ "Transportation" ]