Number of past failures: Number of past failures for a pipe section. The number of past failures may also be associated with a number of recent years. E.g. Number of failures in the last three years.

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Dominant failure type: The most common failure type of the following failure modes: Broken back, piece blown off, longitudinal crack, hole, leak, joint leak, tapping leak, 3rd party damage and none.

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Pipe segment installation year: Construction year of the pipe, burial year of the pipe or pipe installation year.

Accepted Values: 1850 to 2021

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Pipe material: Pipe material type including metallic and cement pipes.

Accepted Values: CI, CICL, AC

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Pipe nominal diameter (mm): Internal diameter of the pipe. Typically, the nominal diameter is expressed in mm conveniently rounded to roughly the manufactured internal diameter, however the imperial terms use inches.

Accepted Values: 50 to 1500 mm

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Pressure head: The operating pressure converted to a meter head value, particularly used in leak rate calculations. Units are in m.

Accepted Values: 0 to 300 m

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Soil Type: The soil type names are from AS 4419 (2018). The users can select a soil type from the list and the soil properties will be prefilled. Soil type could be any of the following soils:

Accepted Values: sand, loamy sand, sandy loam, fine sandy loam, loam, silty loam, sandy clay loam, fine sandy clay loam, clay loam, silty clay loam, sandy clay, light clay, silty clay, medium clay, heavy clay

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Corrosivity level: Used for metallic pipes to determine the:
Long-term, steady state corrosion rate, r_s
Intercept parameter for long-term corrosion, c_s
Transition period between short-term and long-term corrosion, τ

Accepted Values: Very low, low, moderate, high, very high

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Leak rate: Leak rate of a pipe is the measure of water escaping a pipe due to a defect. It can be measured in L/s. Leak rate is used only if water utilities have this value to determine a defect size based on the Orifice equation.

Accepted Values: 0 ≤ Q ≤ 500 L/s

(Click to see User Manual - Liner selection for more information)

Pressure head: The operating pressure converted to a meter head value, particularly used in leak rate calculations. Units are in m.

Accepted Values: 0 to 300 m

(Click to see User Manual - Liner selection for more information)