Pipe

module wntr.network.elements

class Pipe

Bases: Link

Pipe class, inherited from Link.

Constructor

This class is intended to be instantiated through the add_pipe() method. Direct creation through the constructor is highly discouraged.

Parameters:

• name (string) – Name of the pipe

• start_node_name (string) – Name of the start node

• end_node_name (string) – Name of the end node

• wn (WaterNetworkModel) – The water network model this pipe will belong to.

Attributes

name	The link name (read-only)
link_type	returns "Pipe"
start_node	The start node object.
start_node_name	The name of the start node (read only)
end_node	The end node object.
end_node_name	The name of the end node (read only)
length	length of the pipe
diameter	diameter of the pipe
roughness	pipe roughness
minor_loss	minor loss coefficient
initial_status	The initial status (Opened, Closed, Active) of the Link
cv	does this pipe have a check valve
bulk_coeff	if not None, then a pipe specific bulk reaction coefficient
wall_coeff	if not None, then a pipe specific wall reaction coefficient
vertices	A list of curve points, in the direction of start node to end node.
tag	A tag or label for this link

Read-only simulation results

flow	(read-only) current simulated flow through the link
velocity	(read-only) current simulated velocity through the link
headloss	(read-only) current simulated headloss
friction_factor	(read-only) the current simulation friction factor in the pipe
reaction_rate	(read-only) the current simulation reaction rate in the pipe
quality	(read-only) current simulated average link quality
status	the current status of the pipe

---

__init__(name, start_node_name, end_node_name, wn)

to_dict()

Dictionary representation of the link

to_ref()

property bulk_coeff

if not None, then a pipe specific bulk reaction coefficient

Type:

float or None

property cv

does this pipe have a check valve

Type:

bool

property diameter

diameter of the pipe

Type:

float

property end_node

The end node object.

Type:

Node

property end_node_name

The name of the end node (read only)

Type:

str

property flow

(read-only) current simulated flow through the link

Type:

float

property friction_factor

(read-only) the current simulation friction factor in the pipe

Type:

float

property headloss

(read-only) current simulated headloss

Type:

float

property initial_setting

The initial setting for the link (if Active)

Type:

float

property initial_status

The initial status (Opened, Closed, Active) of the Link

Type:

LinkStatus

property length

length of the pipe

Type:

float

property link_type

returns "Pipe"

property minor_loss

minor loss coefficient

Type:

float

property name

The link name (read-only)

Type:

str

property quality

(read-only) current simulated average link quality

Type:

float

property reaction_rate

(read-only) the current simulation reaction rate in the pipe

Type:

float

property roughness

pipe roughness

Type:

float

property setting

(read-only) current simulated setting of the link

Type:

float

property start_node

The start node object.

Type:

Node

property start_node_name

The name of the start node (read only)

Type:

str

property status

the current status of the pipe

Type:

LinkStatus

property tag

A tag or label for this link

Type:

str

property velocity

(read-only) current simulated velocity through the link

Type:

float

property vertices

A list of curve points, in the direction of start node to end node.

The vertices should be listed as a list of (x,y) tuples when setting.

property wall_coeff

if not None, then a pipe specific wall reaction coefficient

Type:

float or None