01. How to model flanges using AutoPIPE?

Mike Dattilio — Tue, 19 Mar 2019 20:22:23 GMT

Current Revision posted to AutoPIPE Wiki by Mike Dattilio on 3/19/2019 8:22:23 PM

	Applies To
	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Area:	Modeling
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05

Problem:

How to model typical flanges using AutoPIPE?

Solution:

In AutoPIPE, flanges are a 1 point element with no length> The program only considers the flange weight and weld connection for SIF calculations. Assuming flange stiffness is same as the pipe is technically incorrect because a flange is more rigid than pipe. However, it does NOT affect analysis results to any significant extent. You can choose to model a flange as a single point or take into consideration the actual flange hub length.

Model a flange using one of the two modeling approaches below. Both approaches will insert a pair of mating 3"-300 lb Weldneck flanges on a pipe run.

Procedure #1: Model Flange set as a single point

A. On a Pipe run insert a node point at the flange matting surface (ex. Insert> Run> 1 ft from A00, creating node A11)

B. Insert Flange using Insert> Flange command.

Flange Type = Weld neck

Pressure Rating = 300 lbs

Weight = 15 lbs

Joint End Type = Weld Neck

Use Weld Factor for Bolt/nut weight = enabled (enabling this option will automatically update Bolt / Nut Weight accordingly)

Insert Mating Flange = enabled

Press OK to closed dialog

C. Done.

Procedure #2: Model Flange to include hub length

Again, the flange component is only a single node point where the SIF value & weight are calculated and inserted. Therefore where ever the flange is inserted will be the location of SIF and weight. The user as a choice of where to insert the flange:

Option 1. Insert Flange at Weld location, correctly identify the SIF and weight.

Option 2. Insert Flange at the face connection, set dialog settings as needed, note the Joint SIF value automatically calculated. Now change the Joint End type = User, and enter 1.0. Select the node point where the flange is welded to the pipe, insert User SIF = recall automatic value calculated in previous step.

This procedure will use Option 2.

A. Perform Procedure #1 above before continuing.

B. Change the Joint End type of both flanges from "Weldneck" to "User defined" and set Joint SIF = 1.0.

C. Insert the pipe run equal to the flange hub length ( ex. 3 1/8") before and after the matting surface node point (ex. A11)

D. Select both pipe runs representing the flange pair (ex. select range A12 tp A13)

Press Rigid Options Over Range (Insert > Properties > Rigid Options Over Range) command, When the dialog appears, the user has to decide if the given options are enabled or disabled.

Include weight

Option 1. Enabled - If enabled the weight of piping (pipe + insulation + Cladding + Lining + Contents) are added in the analysis. Depending on your Flange settings, the flange weight may be in addition to this weight. Reopen the flange component and adjust the weight accordingly to correctly calculate the total weight during the analysis.

Option 2. Disabled - If disabled the weight of piping (pipe + insulation + Cladding + Lining + Contents) are removed from the analysis. Depending on your Flange settings, the flange weight may correctly account for the weight of pipe + insulation + Cladding + Lining + Contents over the hub length. Reopen the flange component and adjust the weight accordingly to correctly calculate the total weight during the analysis.

Include thermal expansion

It is more of a design decision by the individual person if there would be expansion of the flange in the axial direction

Option 1. Enabled - thermal expansion per the temperature load case settings will be accounted over the assigned length of rigid properties during analysis.

Option 2. Disabled - all thermal expansion will not be accounted for the assigned length of rigid properties.

Note, consider adding a new PIPEID to represent the Flange hub length. One could set the Material Properties = NS, adjust the values as needed, However make Density = 0.00. Doing so would make it easier when modeling flanges because only the pipe weight would be ignored while the other pipe weight due to insulation + Cladding + Lining + Contents will be correctly calculated. The only drawback being that all the automatic values generated on the Press/Temp/Pipe ID tab will at this time will revert to values that would need to be manually updated as the temperature changed per load case from this point forward.

E. Select the node points representing the flange connection to the pipe (ex. A12 & A13).

F. Press Insert > Xtra Data> Joint Type user SIF. Select the correct type of end connection (ex. Butt Weld).

Final Model.

Conclusion:

Again, assuming flange stiffness is same as the pipe is technically incorrect because a flange is more rigid than pipe. However, it does NOT affect analysis results to any significant extent. You can choose to model a flange as a single point or take into consideration the actual flange hub length.

AutoPIPE can model a wide range of flange types by using a variation of the techniques mentioned above (i.e. Weldneck, Slip-on, Lap joint, Socket weld, Threaded, etc...).

01. How to model flanges using AutoPIPE?

Mike Dattilio — Tue, 19 Mar 2019 20:14:48 GMT

Revision 7 posted to AutoPIPE Wiki by Mike Dattilio on 3/19/2019 8:14:48 PM

	Applies To
	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Area:	Modeling
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05

Problem:

How to model typical flanges using AutoPIPE?

Solution:

Model a flange using one of the two modeling approaches below. Both approaches will insert a pair of mating 3"-300 lb Weldneck flanges on a pipe run.

Procedure #1: Model Flange set as a single point

A. On a Pipe run insert a node point at the flange matting surface (ex. Insert> Run> 1 ft from A00, creating node A11)

B. Insert Flange using Insert> Flange command.

Flange Type = Weld neck

Pressure Rating = 300 lbs

Weight = 15 lbs

Joint End Type = Weld Neck

Use Weld Factor for Bolt/nut weight = enabled (enabling this option will automatically update Bolt / Nut Weight accordingly)

Insert Mating Flange = enabled

Press OK to closed dialog

C. Done.

Procedure #2: Model Flange to include hub length

A. Perform Procedure #1 above before continuing.

B. Change the Joint End type of both flanges from "Weldneck" to "User defined" and set Joint SIF = 1.0.

C. Insert the pipe run equal to the flange hub length ( ex. 3 1/8") before and after the matting surface node point (ex. A11)

D. Select both pipe runs representing the flange pair (ex. select range A12 tp A13)

Press Rigid Options Over Range (Insert > Properties > Rigid Options Over Range) command, When the dialog appears, the user has to decide if the given options are enabled or disabled.

Include weight

Include thermal expansion

It is more of a design decision by the individual person if there would be expansion of the flange in the axial direction

Option 1. Enabled - thermal expansion per the temperature load case settings will be accounted over the assigned length of rigid properties during analysis.

Option 2. Disabled - all thermal expansion will not be accounted for the assigned length of rigid properties.

F. Select the node points representing the flange connection to the pipe (ex. A12 & A13).

Press Insert > Xtra Data> Joint Type user SIF. Select the correct type of end connection (ex. Butt Weld).

Final Model.

Conclusion:

AutoPIPE can model a wide range of flange types by using a variation of the techniques mentioned above (i.e. Weldneck, Slip-on, Lap joint, Socket weld, Threaded, etc...).

01. How to model flanges using AutoPIPE?

Mike Dattilio — Mon, 18 Apr 2016 18:15:56 GMT

Revision 6 posted to AutoPIPE Wiki by Mike Dattilio on 4/18/2016 6:15:56 PM


	Applies To

	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Environment:	N/A
	Area:	Modeling
	Subarea:
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05

Problem:

How to model typical flanges using AutoPIPE?

Solution:

Model a flange using one of the two modeling approaches below. Both approaches will insert a pair of mating 3"-300 lb Weldneck flanges on a pipe run.

Procedure #1: Model Flange set as a single point

A. On a Pipe run insert a node point at the flange matting surface (ex. Insert> Run> 1 ft from A00, creating node A11)

B. Insert Flange using Insert> Flange command.

Flange Type = Weld neck

Pressure Rating = 300 lbs

Weight = 15 lbs

Joint End Type = Weld Neck

Use Weld Factor for Bolt/nut weight = enabled (enabling this option will automatically update Bolt / Nut Weight accordingly)

Insert Mating Flange = enabled

Press OK to closed dialog

C. Done.

Procedure #2: Model Flange to include hub length

A. Perform Procedure #1 above before continuing.

B. Change the Joint End type of both flanges from "Weldneck" to "User defined" and set Joint SIF = 1.0.

C. Insert the pipe run equal to the flange hub length ( ex. 3 1/8") before and after the matting surface node point (ex. A11)

E. Select both pipe runs representing the flange pair (ex. select range A12 tp A13)

Press Insert > Rigid options over Range (Include Weight = OFF, Include Thermal Expansion = OFF), and press OK button. Pipe will be colored purple

Note: With regards to Rigid properties, It is more of a design decision by the individual person if there would be expansion of the flange in the axial direction, then the Rigid Properties > Thermal Expansion should be turned ON.

F. Select the node points representing the flange connection to the pipe (ex. A12 & A13).

Press Insert > Xtra Data> Joint Type user SIF. Select the correct type of end connection (ex. Butt Weld).

Final Model.

Conclusion:

AutoPIPE can model a wide range of flange types by using a variation of the techniques mentioned above (i.e. Weldneck, Slip-on, Lap joint, Socket weld, Threaded, etc...).

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to
the "Comments" area below. THANK YOU!

Tags: AutoPIPE, Modeling, Flange

01. How to model flanges using AutoPIPE?

Mike Dattilio — Mon, 18 Apr 2016 18:15:13 GMT

Revision 5 posted to AutoPIPE Wiki by Mike Dattilio on 4/18/2016 6:15:13 PM


	Applies To

	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Environment:	N/A
	Area:
	Subarea:
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05

Problem:

How to model typical flanges using AutoPIPE?

Solution:

Model a flange using one of the two modeling approaches below. Both approaches will insert a pair of mating 3"-300 lb Weldneck flanges on a pipe run.

Procedure #1: Model Flange set as a single point

A. On a Pipe run insert a node point at the flange matting surface (ex. Insert> Run> 1 ft from A00, creating node A11)

B. Insert Flange using Insert> Flange command.

Flange Type = Weld neck

Pressure Rating = 300 lbs

Weight = 15 lbs

Joint End Type = Weld Neck

Use Weld Factor for Bolt/nut weight = enabled (enabling this option will automatically update Bolt / Nut Weight accordingly)

Insert Mating Flange = enabled

Press OK to closed dialog

C. Done.

Procedure #2: Model Flange to include hub length

A. Perform Procedure #1 above before continuing.

B. Change the Joint End type of both flanges from "Weldneck" to "User defined" and set Joint SIF = 1.0.

C. Insert the pipe run equal to the flange hub length ( ex. 3 1/8") before and after the matting surface node point (ex. A11)

E. Select both pipe runs representing the flange pair (ex. select range A12 tp A13)

Press Insert > Rigid options over Range (Include Weight = OFF, Include Thermal Expansion = OFF), and press OK button. Pipe will be colored purple

F. Select the node points representing the flange connection to the pipe (ex. A12 & A13).

Press Insert > Xtra Data> Joint Type user SIF. Select the correct type of end connection (ex. Butt Weld).

Final Model.

Conclusion:

AutoPIPE can model a wide range of flange types by using a variation of the techniques mentioned above (i.e. Weldneck, Slip-on, Lap joint, Socket weld, Threaded, etc...).

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to
the "Comments" area below. THANK YOU!

Tags: AutoPIPE, Modeling, Flange

01. How to model flanges using AutoPIPE?

Mike Dattilio — Mon, 18 Apr 2016 18:09:23 GMT

Revision 4 posted to AutoPIPE Wiki by Mike Dattilio on 4/18/2016 6:09:23 PM


	Applies To

	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Environment:	N/A
	Area:
	Subarea:
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05

Problem:

How to model typical flanges using AutoPIPE?

Solution:

Model a flange using one of the two modeling approaches below. Both approaches will insert a pair of mating 3"-300 lb Weldneck flanges on a pipe run.

Procedure #1: Model Flange set as a single point

A. On a Pipe run insert a node point at the flange matting surface (ex. Insert> Run> 1 ft from A00, creating node A11)

B. Insert Flange using Insert> Flange command.

Flange Type = Weld neck

Pressure Rating = 300 lbs

Weight = 15 lbs

Joint End Type = Weld Neck

Use Weld Factor for Bolt/nut weight = enabled (enabling this option will automatically update Bolt / Nut Weight accordingly)

Insert Mating Flange = enabled

Press OK to closed dialog

C. Done.

Procedure #2: Model Flange to include hub length

A. Perform Procedure #1 above before continuing.

B. Change the Joint End type of both flanges from "Weldneck" to "User defined" and set Joint SIF = 1.0.

C. Insert the pipe run equal to the flange hub length ( ex. 3 1/8") before and after the matting surface node point (ex. A11)

E. Select both pipe runs representing the flange pair (ex. select range A12 tp A13)

Press Insert > Rigid options over Range (Include Weight = OFF, Include Thermal Expansion = OFF), and press OK button. Pipe will be colored purple

F. Select the node points representing the flange connection to the pipe (ex. A12 & A13).

Press Insert > Xtra Data> Joint Type user SIF. Select the correct type of end connection (ex. Butt Weld).

Final Model.

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to
the "Comments" area below. THANK YOU!

Tags: AutoPIPE, Modeling, Flange

01. How to model flanges using AutoPIPE?

Mike Dattilio — Mon, 18 Apr 2016 17:31:22 GMT

Revision 3 posted to AutoPIPE Wiki by Mike Dattilio on 4/18/2016 5:31:22 PM


	Applies To

	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Environment:	N/A
	Area:
	Subarea:
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05

Problem:

How to model typical flanges using AutoPIPE?

Solution:

Procedure #1: Model Flange set as a single point

Note: this procedure will insert a pair of mating 3"-300 lb flange on a pipe run. Modeled as a single node point.

A. On a Pipe run insert a node point at the flange matting surface (ex. Insert> Run> 1 ft from A00, creating node A11)

b. Insert Flange using Insert> Flange command.

Flange Type = Weld neck

Pressure Rating = 300 lbs

Weight = 15 lbs

Joint End Type = Weld Neck

Use Weld Factor for Bolt/nut weight = enabled (enabling this option will automatically update Bolt / Nut Weight accordingly)

Insert Mating Flange = enabled

Press OK to closed dialog

c. Done.

Procedure #2: Model Flange to include hub length

Note: this procedure will insert a pair of mating 3"-300 lb flange on a pipe run. Modeled with the flange hub length..

A. Start by inserting an anchor to represent the equipment flange side of the flange pair, Insert> Anchor.

B. Insert a short run of pipe equal to the actual flange length, Insert> Run (ex. 3.5").

C. Insert another pipe run to the next node point in the model, Insert > Run (ex. 4 ft).

D. Insert a flange at Nozzle / Equipment interface, in this example that would be the same node point as the anchor. Move active node point to the anchor, once there use Insert> Flange command.

On the flange dialog, change Joint End Type = "User Defined", set "Joint SIF" = 1.0

E. Select short length of pipe representing the actual flange length, press Insert > Rigid options over Range (Include Weight = OFF, Include Thermal Expansion = OFF), and press OK button. Pipe will be colored purple

F. Select the node point representing the flange connection to the pipe. Press Insert > Xtra Data> Joint Type user SIF. Select the correct type of end connection or enter a user SIF.

(From AutoPIPE V8i 9.5)

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to
the "Comments" area below. THANK YOU!

Tags: AutoPIPE, Modeling, Flange

01. How to model typical flanges using AutoPIPE?

Mike Dattilio — Mon, 18 Apr 2016 15:44:06 GMT

Revision 2 posted to AutoPIPE Wiki by Mike Dattilio on 4/18/2016 3:44:06 PM


	Applies To

	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Environment:	N/A
	Area:
	Subarea:
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05

Problem:

How to model typical flanges using AutoPIPE?

Solution:

See the following procedure to model the actual flange length:

Note: This procedure is modeling the connection point between 2 flanges ( vessel / equipment flange and mating flange.

A. Start by inserting an anchor to represent the equipment flange side of the flange pair, Insert> Anchor.

B. Insert a short run of pipe equal to the actual flange length, Insert> Run (ex. 3.5").

C. Insert another pipe run to the next node point in the model, Insert > Run (ex. 4 ft).

D. Insert a flange at Nozzle / Equipment interface, in this example that would be the same node point as the anchor. Move active node point to the anchor, once there use Insert> Flange command.

On the flange dialog, change Joint End Type = "User Defined", set "Joint SIF" = 1.0

F. Select the node point representing the flange connection to the pipe. Press Insert > Xtra Data> Joint Type user SIF. Select the correct type of end connection or enter a user SIF.

(From AutoPIPE V8i 9.5)

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to
the "Comments" area below. THANK YOU!

Tags: AutoPIPE, Modeling, Flange

01. How to model typical flanges using AutoPIPE?

Mike Dattilio — Mon, 18 Apr 2016 15:41:44 GMT

Revision 1 posted to AutoPIPE Wiki by Mike Dattilio on 4/18/2016 3:41:44 PM


	Applies To

	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Environment:	N/A
	Area:
	Subarea:
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05