Piping Input menu: Model > Spring Can 
Input Tools toolbar: Spring Can with Friction Builder
Displays the Spring Can with Friction Builder dialog. You can specify spring can assembly parameters and then create the can at the selected node. The pipe and pipe support (shoe, trunnion, or cradle) slides on the top plate of the spring can.
A spring can performs the same function as a spring hanger, except that it supports the pipe from below and carries piping loads when the pipe moves up or down due to thermal expansion. The spring can remains in contact with the pipe throughout the thermal cycle. The pipe experiences frictional forces when the pipe, trunnion, shoe, or cradle slides on the top plate of the spring can.
For details on spring can components and modeling methods, see Spring Cans with Friction and Spring Can Restraint Orientation on Skewed Pipe in the CAESAR II Application Guide.
Modeling Method
Comprehensive
Specifies a detailed design of the spring can assembly.
The comprehensive method can be used without manual modifications for horizontal
pipe. The comprehensive method can also be used with manual modifications for vertical
pipe and pipe skewed in the vertical plane.
Not Insulated
Select this option when you have not defined an insulation thickness for the selected element.
The design consists of an optional trunnion or shoe, a spring can, and an optional stanchion supporting a non-insulated pipe. The trunnion or shoe, if used, attaches to the pipe. If there is no trunnion or shoe, the pipe rests directly on the top plate of the spring can.
Hot Insulated
Select this option when you have defined an thickness for hot insulation of the selected element.
The design consists of a trunnion or shoe, a spring can, and an optional stanchion supporting a hot-insulated pipe. The trunnion or shoe attaches to the pipe.
Cold Insulated
Select this option when you have defined an thickness for cold insulation of the selected element..
The design consists of a cradle, a spring can, and an optional stanchion supporting a cold-insulated pipe. The cradle includes a clamp which supports the insulation cladding.
Simple
Select this method when you only require a simplified, generic design to model the spring can using the available space and the coefficient of friction.
The design applies to any hot-insulated, cold-insulated, or non-insulated condition. The simple design method provides the expected behavior of the pipe sliding on top of a spring can by modeling the supports to account for friction at the pipe centerline. The design does not include rigid elements for the pipe radius, trunnion, shoe, cradle, stanchion, and spring can.
The simple method can be used without manual modifications for horizontal, skewed,
and vertical pipe.
Spring Can Assembly Location, SL
From Node (node number)
Places the spring can assembly at the From node of the piping element.
To Node (node number)
Places the spring can assembly at the To node of the piping element.
Hanger Node, HN
Specifies a node number for the top of the spring can. This is an optional parameter and is only available for a Comprehensive model. If you do not define the hanger node, the software assigns a unique node number.
The hanger node number must be unique in the model.
Anchor Node, AN
Specifies a connecting node number for the bottom of the spring can assembly.
You can use an anchor node with a Cnode when the other end of the spring can assembly connects to another point in the model, such as equipment or supporting structure. This is an optional parameter. If you do not define the anchor node, the software assigns a unique node number.
The anchor node number must be different from the assembly nodes or the hanger node,
but can be another existing node in the model.
Available Installation Space, H
Specifies the installation clearance required to design the spring.
In a Simple model, H is the height of the spring can assembly.
In a Comprehensive model, H is the height from the spring can assembly foundation or support structure to the bottom of the trunnion, shoe, or cradle. If there is no trunnion, shoe, or cradle, then H is the distance from the spring can assembly foundation or support structure to the bottom of the pipe.
Trunnion/Shoe Height, h
Specifies the height of the trunnion or shoe in a Comprehensive Hot Insulated or Comprehensive Not Insulated model. This is an optional parameter for a Not Insulated model.
Cradle Height, h
Specifies the height of the cradle in a Comprehensive Cold Insulated model.
Coefficient of Friction, Mu
Specifies the coefficient of friction, m, between the top of spring can and the bottom of the trunnion, shoe, or cradle.
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