Configuring Global Inputs

The Global Inputs grid is used to define global (default) input values, minimum and maximum ranges, and point values to use in a calculation when no such values are specified for a pack segment. The global inputs will be used only if the value is not specified by a custom calculation rule or base input rule. Each value is treated independently, so if a global minimum value is set, it would be used on a pack segment input that had no minimum value set, even if it did specify a maximum value. The input value can either be a set value or the value of a specified point. The inputs listed differ depending on the pipeline content and calculation choices.

Click the thumbnail to see
an example Global Inputs page

See the following subsections below for more information:

Inputs by Pipeline Content
Global Input Properties
System inputs

Inputs by Pipeline Content

The following table lists the various global inputs by pipeline content.

Natural Gas	Supercritical CO₂	Petroleum Liquids
Atmospheric Pressure Volume Correction Factor Specific Gravity Carbon Dioxide Carbon Monoxide Nitrogen Hydrogen Average temperature inputs (see below) Average pressure inputs (see below) Supercompressibility Factor Energy Content MAOP inputs (see below) System inputs Base temperature Base pressure Contract hour See Natural Gas UDCs for definitions of these inputs.	Atmospheric Pressure Average temperature inputs (see below) Average pressure inputs (see below) MAOP inputs (see below) Measured Inlet Density Measured Outlet Density System inputs Contract hour See Supercritical CO2 UDCs for definitions of these inputs.	Average temperature inputs (see below) Average pressure inputs (see below) MAOP inputs (see below) Commodity Type (see note below) Alpha 60 Pressure Equilibrium Vapor Observed Density Observed Temperature Observed Pressure System inputs Standard temperature Standard pressure Contract hour See Petroleum Liquids UDCs for definitions of these inputs.
Inputs Notes Note: Inputs depend on the calculation type selected on the Calculations page. Average temperature inputs Temperature: 1 — Temperature: n or Inlet Temperature and Outlet Temperature Average pressure inputs Pressure: 1 — Pressure: n or Inlet Pressure and Outlet Pressure or Inlet Pressure, Outlet Pressure, and Pressure: 1 — Pressure: n MAOP inputs MAOP or MAOP: 1 — MAOP: n or Inlet MAOP and Outlet MAOP or Inlet MAOP, Outlet MAOP, and MAOP: 1 — MAOP: n Commodity Type 0: Unknown (Requires the "Alpha 60 thermal expansion factor" to be set) 1: Crude 2: Refined unspecified 3: Refined Fuel Oils 4: Refined Jet Fuels 5: Refined Transition 6: Refined Gasolines 7: Lubricating Oil 8: Special Apps

Natural Gas

Supercritical CO₂

Petroleum Liquids

Atmospheric Pressure

Volume Correction Factor

Specific Gravity

Carbon Dioxide

Carbon Monoxide

Nitrogen

Hydrogen

Average temperature inputs (see below)

Average pressure inputs (see below)

Supercompressibility Factor

Energy Content

MAOP inputs (see below)

System inputs

Base temperature

Base pressure

Contract hour

See Natural Gas UDCs for definitions of these inputs.

Atmospheric Pressure

Average temperature inputs (see below)

Average pressure inputs (see below)

MAOP inputs (see below)

Measured Inlet Density

Measured Outlet Density

System inputs

Contract hour

See Supercritical CO2 UDCs for definitions of these inputs.

Average temperature inputs (see below)

Average pressure inputs (see below)

MAOP inputs (see below)

Commodity Type (see note below)

Alpha 60

Pressure Equilibrium Vapor

Observed Density

Observed Temperature

Observed Pressure

System inputs

Standard temperature

Standard pressure

Contract hour

See Petroleum Liquids UDCs for definitions of these inputs.

Inputs Notes

Note: Inputs depend on the calculation type selected on the Calculations page.

Average temperature inputs

Temperature: 1 — Temperature: n

Inlet Temperature and Outlet Temperature

Average pressure inputs

Pressure: 1 — Pressure: n

Inlet Pressure and Outlet Pressure

Inlet Pressure, Outlet Pressure, and Pressure: 1 — Pressure: n

MAOP inputs

MAOP

MAOP: 1 — MAOP: n

Inlet MAOP and Outlet MAOP

Inlet MAOP, Outlet MAOP, and MAOP: 1 — MAOP: n

Commodity Type

0: Unknown (Requires the "Alpha 60 thermal expansion factor" to be set)

1: Crude

2: Refined unspecified

3: Refined Fuel Oils

4: Refined Jet Fuels

5: Refined Transition

6: Refined Gasolines

7: Lubricating Oil

8: Special Apps

Global Input Properties

The properties for each section of this page are described below.

Column	Description
(Global Input) Name	The list of global inputs to be used in a calculation when no such value is specified for a pack segment. The inputs differ depending on the pipeline content and the calculation choices, as shown above. Calculating MAOP at the same average pressure requires two inputs: Inlet MAOP and Outlet MAOP. See Configuring UDC Mappings for descriptions for these inputs.
Min and Max	The Min and Max fields can be set to specify a range for the input. One, both, or neither of the fields can be set. If a value specified by a custom rule is out of range, a warning will be generated and the value from the base inputs is used.
Point	The Point column specifies the value to use if an input is not specified or set by a custom calculation rule. The value can either be a set value or the value (for example, 65) of the specified point (for example, ACME4.UIS::PRESSURE_IN). Click the small black arrow to select a point. -OR- Type a numerical value for the input. The Point column can hold either a point tag or a static value.
Unit	The Units column specifies the units for the input. The units cannot be changed. If a point is specified for the input value, the units of the point record must be convertible to the units of the input (for example, Kelvin to Fahrenheit). An input with no units specified has no requirement for units within the point record.

System inputs

The following properties are set for the entire pipeline hierarchy of pack segments.

The "base" or "standard" condition is a defined combination of temperature and pressure at which gas or liquid volumes are expressed for purposes of custody transfer, stock accounting, etc. The terms base and standard are used interchangeably, although in the CygNet Line Pack application we use "Base" for natural gas pipelines and "Standard" for liquid pipelines to differentiate between the API-defined base conditions and the contract conditions.

Accepted base or standard temperatures are 60°F, 15°C, and 20°C. Accepted base or standard pressures are 0 psia (for natural gas); and 0 psig (for non-volatile liquids at the standard temperature) or the liquid’s vapor pressure at the standard temperature (for volatile liquids).

Note: The temperature and pressure inputs do not apply to supercritical CO₂.

Property	Description
Base temperature or Standard temperature	Specifies the temperature input value used for the line pack calculation for each pack segment, but it is only configured once since it is the same for an entire location.
Base pressure or Standard pressure	Specifies the pressure input value used for the line pack calculation for each pack segment, but it is only configured once since it is the same for an entire location.
Contract hour	The contract hour to be used when calculating gas/CO2/liquids hour totals. This value is stored in memory only, no UDC is required.