Applies To
	Product(s):	AutoPIPE,
	Version(s):	2004, XM, & V8i
	Environment:	N/A
	Area:	Modeling
	Subarea:
	Original Author:	Bentley Technical Support Group

Dec 2014, AutoPIPE V8i 09.06.01.10

Problem:

Would like to know the explanation about the line stop ignoring friction. In my opinion, this is not feasible especially when the line stops are placed nearby the nozzles. Moreover, high temperature  lines usually have high line stop loads to produce high frictional forces in the other 2 directions. These are being ignored by AutoPipe.

Answer:

Based on typical construction practice, a line stop is usually a lug or some sort of pipe attachment rigidly mounted that moves with the pipe in the axial direction. Most line stops have a predetermine gap for axial movement. When the pipe's axial movement is such that the gap closes, typically the Lug / attachment has come into contact with something (i..e concrete block, beam structure, etc..) that it prevents the pipeline from freely moving. This type of support is called a Line Stop

A Line stop has no friction involved as the lug / attachment is rigidly mounted to the pipe where it freely moves with the pipe. Also a pipe is not supported by a line stop, so there is no bearing force on a line stop support. The only contact for a Line stop is when the gap closes and it is resting against the anchor object.

See Also

Bentley AutoPIPE

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

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