PROP Systems Variables – Predicting Ruptures on Operating Pipeline

PROP System Variables

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OUR VARIABLES

VARIABLES ASSOCIATED WITH PIPELINE RUPTURE

Age

Size

Material Type

Pipe Wall Thickness

Pipe Dents and Gouges

Flow Reversals/ Change in Flow Rate

Graphitization

Internal Pipe Pressure

Hoop Stress

Soil type/ conditions

Vibration

Weather

Heat/ Cold

Other Construction Activity Nearby

Contractor Damage

Operator Error

Frost Cap

Pipe Depth

Frost Heaving

Internal and/ or External Corrosion

Gas Main Replacement Strategy

Gas Leak Survey Strategy

Soil Erosion

Water Main Breaks

Drought

Poor Workmanship

Traffic Loading Conditions

Other Utility Companies Construction Activity

Previous Gas Main Break Activity

Water Temperature

Air Temperature

Ground Settlement

Pipe/ Rock Contact

Loss of Bedding Support (Creating Bending or Flexural Stress)

Thermal Stresses

Pavement Type (Dead Load on Pipe)

Internal Pipe Friction

Mechanical Failure

Hydraulic Scouring

Weld Defects

Wrong Backfill Material Damaged Pipe or Coating

Earthquakes

Rain Deficit

Corrosion/ Stray Currents

Ground Temperature

Deteriorating Joints and Fittings

Soil Contamination

Ground Water

Sinkholes

Abandoned/ Corroded & Underground Facilities

Uncharted Underground Streams

Other Underground Facility Ruptures

Ground Movement/ Unstable Soil Conditions