Select the substance in the pipeline:

• Natural gas
• Supercritical CO2
• Liquids

Depending on the selection made here, the Line Pack editor will display custom configuration fields and dialog boxes.

Specify the formula to use when calculating average temperature. Options include:

• Arithmetic mean — For Arithmetic mean, specify the maximum number of temperature inputs that will be used in the arithmetic mean Average Temperature calculation. This setting configures the number of temperature inputs allowed (n), in addition to the Temperature: 1 and Temperature: 2. Up to 20 inputs per pipeline segment are allowed.
• Weighted average — For Weighted average, the formula uses two temperature inputs: Inlet Temperature and Outlet Temperature. This is the default option.

See the Average Temperature formula for more information about how these options are calculated.

Specify the formula to use when calculating average pressure. Options include:

• Arithmetic mean — For Arithmetic mean, specify the maximum number of pressure inputs that will be used in the arithmetic mean Average Pressure calculation. This setting configures the number of pressure inputs allowed (n), in addition to the Pressure: 1 and Pressure: 2. Up to 20 inputs per pipeline segment are allowed.
• Two-thirds rule — For the Two-thirds rule, the formula uses two pressure inputs: Inlet Pressure and Outlet Pressure. This is the default option.
• Complex arithmetic mean — For Complex arithmetic mean, specify the maximum additional pressure inputs that will be used in the complex arithmetic mean Average Pressure calculation. The formula for this average requires Inlet Pressure and Outlet Pressure, in addition to multiple pressure values at different points on the pipeline segment. This setting configures the number of pressure inputs allowed (n), in addition to the Pressure: 1 and Pressure: 2. Up to 20 inputs per pipeline segment are allowed.

See the Average Pressure formula for more information about how these options are calculated.

Specify the formula to use when calculating the supercompressibility factor. Supercompressibility calculations take into account how different gas compositions compress. These differences can be applied to corrected volumes using the following supercompressibility calculation options:

• AGA 8 - Gross Method 2
• NX 19 - Legacy
• NX 19

See the Supercompressibility Factor for more information.

Specify the CO₂ density value to use in the rollup if both values are available for a segment. Options include:

• Pack from measured density — a density sensor in the pipeline provides a measured density value
• Pack from calculated density — a density value is derived from a lookup table of calculated density values

See the Overview for more information about density sources. The rollup calculation method can be overridden at the pack segment or pack sub-segment level if required.

Maximum Allowed Operating Pressure (MAOP) is an optional secondary value that is only calculated when the normal line pack calculation executes.

Specify the formula to use when calculating the Maximum Allowed Operating Pressure (MAOP). Options include:

• Not calculated
• Single input
• Same as average pressure

For Single input and Same as average pressure, specify how frequently to calculate (Calculate every number of seconds) the pack at the Maximum Allowed Operating Pressure (MAOP).

Specifies the bit to set on the output point if there is an error in the calculation.

Specifies the bit to set on any points used as an input in the Line Pack calculation.

Specifies the bit to set on a pack segment if one of its default or base inputs were used in the calculation.

Specifies the bit to set on any value that Line Pack sets.

Defines what action to take when a calculation input is missing or falls outside the range specified in the Base Inputs dialog box. Options include:

• Use last good input value and calculate will continue the Line Pack calculation for a pack segment that has an invalid input by using the last input value stored in the associated Last Segment Input: point.
• Stop calculation and use last good result halts the Line Pack calculation and uses the last calculated result and sets the unreliable bit.

See Configuring UDCs Mappings for more information about the Last Segment Input: points.

Determines which custom calculation rules to use when determining the input for a pack segment. Rules are evaluated in order from top to bottom. Options include:

• All rules are evaluated will evaluate all the rules. If multiple rules that validate to true set the same input, then the value set by the first rule will be used.
• When the Only the first rule to validate is used option is used, if any rule evaluates to be true, then that input is used and no other rules are evaluated.