Tutorial-Asme b311 With Hdpe

8/9/2019 Tutorial-Asme b311 With Hdpe

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Tutorial-ASME_B311_With_HDPE.docx Rev 0

AUTOPIPE

USING AUTOPIPE ASME B31.1 CODE WITH CODE

CASE N-755-1 (HDPE) SUPPORT

Rev. No. Date Prepared by Description

0 08/16/2013 Bilal Shah Initial structure for review / completion

1 08/19/2013 Josh Taylor Improved images in tutorial.

2 8/22/2013 Josh Taylor Updated images and steps to comply with ULNRC-

05553 results

3

4


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TABLE OF CONTENTS

1 Introduction .........................................................................................................................................................

2 Model Overview ...................................................................................................................................................

2.1 Metallic Pipe Properties .................................................................................................................................. 1

2.2 HDPE Pipe Properties ...................................................................................................................................... 2

3 Workflow - Using HDPE piping with ASME B31.1 ..................................................................................................

4 Setting Up the General Model Options .................................................................................................................

5 Defining Segment and Metallic Pipe Properties ....................................................................................................

6 Defining Pressure & Temperature Properties .......................................................................................................

7 Defining the Metallic Piping Model Geometry ......................................................................................................

8 Defining HDPE Pipe Properties ............................................................................................................................ 1

9 Defining Flange Connection ................................................................................................................................ 1

10 Inserting HDPE Run .............................................................................................................................................

11 Inserting HDPE Miter Bend .................................................................................................................................

12 Inserting HDPE Pipe Run .....................................................................................................................................

13 Inserting Anchor at A11 ...................................................................................................................................... 1

14 Define Soil Properties for the Buried Pipe Portion ............................................................................................... 1

15 Insert a User Joint Type and User SIF ................................................................................................................... 2

16 Define A Seismic Anchor Movement load case .................................................................................................... 2

17 Define A Soil Settlement Case ............................................................................................................................. 2

18 Define A Seismic Wave Propagation Case ............................................................................................................ 2

19 Define Static Analysis Set .................................................................................................................................... 2

20 Review Default Code Combinations for HDPE ...................................................................................................... 2

21 Setting HDPE Buried Pipe Result Options ............................................................................................................ 2

22 Setting Model Result Options ............................................................................................................................. 3

23 Generate Output Report ..................................................................................................................................... 3

24 View Code Stress Color Plots ............................................................................................................................... 3

25 View Code Stress on the Result Grid ................................................................................................................... 3

26 Comparison of Results with Callaway Report ...................................................................................................... 3


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27 Calculations from ULNRC-05553 .......................................................................................................................... 3


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1 INTRODUCTION

AutoPIPE version 9.6 supports ASME Boiler and Pressure Vessel code case N-755-1 for using polyethylene pipes for

class 3 buried piping system. This document provides a quick walk through for modeling, analyzing and generating

output reports for a model with code as ASME B31.1 and with HDPE material defined.

The menu options and dialog controls in this tutorial are displayed in Green Italic.

Additional notes and tips are displayed in Blue Italics.

2 MODEL OVERVIEW

High Density Polyethylene (HDPE) pipes are connected with metallic piping using a metallic flange and HDPE

adaptor.

The pipe properties for the provided model are adjusted to be similar to Supply Line of Callaway Plant Unit 1

(ULNRC-05553). The pipeline geometry of the supplied model however is different than that of the model in the

report. The results for some of the stress categories provided by AutoPIPE are also compared with the values in the

report.

2.1

METALLIC PIPE PROPERTIES

The pipe properties for the METAL supply line are as below:

Field Value Comments

Pipe Identifier METAL Steel Pipe

Outside diameter 30 in


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Wall thickness 0.375 in

Modulus 28.3 E6 psi

Density 489.0 lb/ft3

Poisson's ratio 0.3

2.2

HDPE PIPE PROPERTIES

The pipe properties for the HDPE supply line are as below:

Field Value Comments

Pipe Identifier HDPE HDPE Pipe

Outside diameter36 in Connected to steel pipe using metallic flange and HDPE

flange adaptor

Wall thickness 3.789 in

Dimension Ratio NS Non-standard dimension ratio

Modulus 0.0290 E6 psiDensity 59.9 lb/ft

3

Poisson's ratio 0.4

Note: For this tutorial, the properties of pipe used for HDPE miter bend are similar to that of connected HDPE Pipe.

ASME CC N-755-1 requires the minimum wall thickness of the miter bend to be at least 1.22 tfab minof the connected

pipe. A consistency check warning is provided by AutoPIPE in case the miter bend wall thickness is less than 1.22 tfab

minof the connected pipe.


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3 WORKFLOW - USING HDPE PIPING WITH ASME B31.1

Create new model and setup General

Model Options to work with HDPE

Define an HDPE pipe identifier

assigning outside diameter, DR,

erosion and associated properties for

PE material

Using the pipe HDPE pipe identifier,

define HDPE pipe runs and bends in

the model

Assign soil properties to the buried

portion of the model. This includes

assigning soil stiffness values, soil

overburden stresses and seismic

wave data associated with the soil.

Please refer to Tutorial - Soil

Overburden and Seismic Wave

Propagation in AutoPIPE v9_5.pdffor further details.

Model

Setup

DefiningHDPEpipeide

ntifier

DefineHDPEpipinggeometry

Definesoilpropertiesf

orburiedpiping


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Define loads on the model like

Seismic Anchor Movement, imposed

support displacement due to soil

settlement, equivalent seismic wave

propagation

Modify the options for the analysis

set including all required load cases

and setting Gaps/Friction/Soil option

for the analysis and non-linear

analysis options

Review default code combinations for

HDPE and define the HDPE buried

pipe options and model result options

Finally review the output report

results, generate color plots for code

stresses and review the results in the

output grids

Defineloads

Modelanalysis

Postprocessing

Reviewresults


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4 SETTING UP THE GENERAL MODEL OPTIONS

After launching AutoPIPE, click on File > Newto create a new model. Provide a location for the model to be saved

and give it a name. Enter the information in the table below on the General Model Options. General Model

Options dialog and review the information. Ensure that it matches the image below.

Field Selection for Walkthru Comments

Piping CodeB31.1 Power HDPE is currently supported for ASME NC, ASME ND

and B31.1 code only

Edition2012 HDPE is currently supported for code year editions 2004

and later only for above mentioned piping codes

Include ASME CC N-755-1

(HDPE)

Checked This field shall be checked if HDPE support is required in

the modelUnit file name - Input /

Output

English / EnglishEnter the input and output units for the model

Number of

thermal/pressure cases

5 Enter the number of thermal/pressure cases required.

Additional thermal cases should be defined if seismic

wave propagation effects are to be considered.

Ambient temperature

73F This is the ambient temperature defined for the model.

The cold modulus, and cold allowable will be fetched

from the library at this temperature.

Libraries - Component

AUTOPIPE This is the default component library for ASME ND

code. AutoPIPE switches automatically to HDPE

component library when working with HDPE points.

Libraries - Material B311-12 This is the default material library for B31.1 2012 code.AutoPIPE switches automatically to HDPE material

library when working with HDPE points.

Press OK on the General Model Options dialog.

5 DEFINING SEGMENT AND METALLIC PIPE PROPERTIES


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After the General Model Options, the Segment dialog will be displayed as shown below:

The first point name and the offsets from origin, if any, should be defined here. A Pipe data identifier needs to be

defined at this point. Define a metallic pipe with SA-106-B specifications here.

Note: The very first pipe identifier defined in the model using Segment dialog cannot be tagged as an HDPE pipe.

This is currently a limitation for AutoPIPE.

Enter the following on the Segment dialog:


Segment name A

Name of first point A00

Offsets Default

Pipe data identifier METAL This would be a metallic pipe

Press OKon the Segment dialog.

The Pipe Properties dialog would appear next. You would need to define the properties for the metallic piping on

the dialog:


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Enter the following on the Pipe Properties dialog:


Nominal Diameter 30.00 in

Schedule STD

Corrosion Allow 0.000 in

Mill tolerance Default (0.047)

Specific gravity for contents 1.00

Pipe Material NS

Press OKon the Pipe Properties dialog.


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6 DEFINING PRESSURE & TEMPERATURE PROPERTIES

The Operating Pressure & Temperature dialog would be displayed next. We will define one ambient case, three

operating cases and leave the last case to be updated for seismic wave propagation.

Enter the pressure and temperature details as displayed in the dialog above and press OKon the dialog.

7 DEFINING THE METALLIC PIPING MODEL GEOMETRY

Now you can start defining the metallic piping model geometry. On point A00, insert an anchor which would

represent the metallic pipe coming out of a building. With point A00 selected, invoke Insert > Anchor...and click OK

on the dialog without modifying any data.


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Next, define a pipe run by invoking Insert > Run... and enter the information on the dialog as shown below:

Note that the Generate Points is set to 2. The Pipe data identifier is METAL, as defined previously. Press OKon theRun Point dialog.


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8 DEFINING HDPE PIPE PROPERTIES

Now that the metal pipe has been created, define properties for an HDPE pipe to be inserted in the model. Invoke

Insert > Pipe Properties... to define a HDPE pipe identifier. The Pipe Properties dialog will be displayed. Check the

HDPE Materialcheckbox on the dialog, and note that the fields on the dialog are updated to accommodate HDPE

pipe properties.

Set the pipe properties as displayed in the screen capture above and press OKon the dialog.

Note: When HDPE Material checkbox is checked, a confirmation dialog is displayed to the user. Currently, HDPE

pipe identifier cannot be changed to a metallic pipe.

AutoPIPE will detect a change in material and would display the Operating Pressure & Temperature dialog for any

updates that the user wants to carry out.


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You can update the load duration field now on the Operating Pressure & Temperature dialog for each thermal

case. Notice that the dialog is now switched to accommodate HDPE piping point requirements and the Expansion,

Hot modulus, Hot allow and Poisson'sfields are being fetched from HDPE library. Make the changes as displayed in

the screen capture and press OKon the Operating Pressure & Temperature dialog.


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9 DEFINING FLANGE CONNECTION

At this point, you can define a flange connection at the point where the metallic piping and the HDPE piping would

be connected. While point A02 is selected, invoke Insert > Flange... to insert a flange connection at the point. The

Flange dialog will be displayed as shown below:

Enter the information as displayed in the screen capture above and press OK.

Note: Currently, no additional checks are performed for the HDPE-Metallic flange connection as no data is

available. User can define User Joint Type including B1, B2, and SIF values for the flange point.

10 INSERTING HDPE RUN

We can now insert an HDPE run with the pipe identifier defined for HDPE. Invoke Insert > Run... to insert an HDPE

run. Enter the information on the dialog as displayed below and press OK.


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11 INSERTING HDPE MITER BEND

As per CC N-755-1, HDPE system can only have run segments and bends. We will first define a separate pipe

identifier with thickness greater than that of the connecting pipe. Invoke Insert > Pipe Properties...to define pipe

properties for the miter bend. Enter the information as displayed below and press OK:

Note that the Dimension Ratiohas been modified to provide more thickness for the bend. We can now insert an

HDPE mitered bend using the pipe identifier defined. Invoke Insert > Bend...to insert a close miter elbow with 4

cuts (5 segments). Enter the information on the Bend Point dialog as displayed below and press OK.


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The bend is completed in two steps. User would need to define a run after the bend for AutoPIPE to identify the

direction of the bend. Invoke Insert > Run...to insert a run point after the bend. Enter the information as displayed

in the dialog below and press OK.

When OKis pressed on the Run Point dialog, AutoPIPE detects change in the Pipe Identifier on the Run Point

dialog. The Location dialog is displayed which asks the user where the change takes effect. Enter the information

on the Location dialog as displayed below and press OK.


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Note: ASME CC N-755-1 requires that the maximum DR of the bend segment be 13.5 and the minimum wall

thickness of mitered elbow segments shall be at least 1.22 tfab min. AutoPIPE allows to insert bend segments greater

than DR 13.5 and wall thickness less than 1.22 tfab min, however, a warning message is displayed in the consistency

check if any such bends are found in the model.

Note: ASME CC N-755-1 only permits insertion of 3 segment and 5 segment mitered bends. AutoPIPE limits the

number of cuts to 4 and 6 (3 and 5 segment bends).

Note: Alternatively, you can define the run with the same identifier as the pipe and modify the bend pipe identifier

later by selecting the bend and invoking Modify > Pipe Properties over Range... defined in next section.

12 INSERTING HDPE PIPE RUN

We will now define another bend and then insert an HDPE pipe run to complete the model geometry. Invoke Insert

> Bend...to define another mitered bend. Enter the information as displayed in the dialog below and press OK:

Define a run after the bend point by invoking Insert > Run...and entering the information below to complete the

bend and HDPE run insertion. Enter the information as displayed in the dialog below and press OK:


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Now we would modify the Pipe identifier for the bend at point A06 to be set to BEND. Select the bend so that it is

highlighted as below:

Invoke Modify > Pipe Properties Over Range...and select the Pipe Identifieron the Pipe Properties dialog as BEND

from the drop down:


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As soon as the pipe identifier is selected, AutoPIPE displays a note that previously defined pipe data will be used

and the Pipe Properties dialog is closed.

Also select the pipe section from A03 to A04 N to modify the pipe identifier for that range to HDPE.

After selecting the range, invoke Modify > Pipe Properties Over Range...and select the Pipe Identifier on the PipeProperties dialog as HDPE from the drop down. This will set the pipe identifier for the pipe before bend as HDPE

which is defined for the run portion.


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13 INSERTING ANCHOR AT A11

Finally you can insert an Anchor at the last point of HDPE run (A11) to complete the geometry for the walk through

model. Select point A11 and invoke Insert > Anchor...and click OKon the Anchor dialog using the default values:

14 DEFINE SOIL PROPERTIES FOR THE BURIED PIPE PORTION

We can now define the soil properties on the buried portion of the HDPE pipe run. Select the range from A05 to

A11 (click on A05 and then click on A11 while keeping SHIFT key down) and invoke Insert > Soil Properties...and

enter the information on the Soil Properties dialog as displayed below:


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Click on the Enter Soil Propertiesbutton to Invoke Edit Soil Properties dialog. Select the Soil Type as Medium Sandand click the Generatebutton to generate the Soil Stiffness Properties:


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Next, click on the Soil Overburden Loadsbutton to define soil overburden loads and other related properties. Enter

the information on the dialog as displayed below and press OKon the Soil Overburden Loads dialog:

Next, click on the Seismic Wave Databutton to enter seismic wave data to be associated with the soil identifier.Enter the information on the dialog as displayed below and press OKon the Seismic Wave Data dialog:


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Observe that the dTvalue on the Edit Soil Properties dialog is updated to display the ambient + dT due to seismic

wave propagation for the selected pipe identifier.

Press OKon the Edit Soil Properties dialog and press OKon the Soil Properties dialog.

15 INSERT A USER JOINT TYPE AND USER SIF

AutoPIPE allows the user to define a User joint type and SIF for a point. Select point A07 and invoke Insert > Xtra

Data > Joint Type & User SIF. Enter the information on the Joint Type & User SIF dialog as below and press OK:

The factor entered would now be used for the selected point in calculations.

16 DEFINE A SEISMIC ANCHOR MOVEMENT LOAD CASE


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We will now define a Seismic Anchor Movement load case which will be used in the Seismic Induced Combination.

Select point A00 and invoke Insert > Xtra Data > Imposed Support Displacement. Enter the values on the Imposed

Support Displacement dialogs as displayed below and press OK:

Next, analyze the selected SAM case S1. InvokeAnalyze > Seismic Anchor Movementand enter the information as

displayed below and press OK:

Ignore the consistency checks for now; they will be reviewed later.

17 DEFINE A SOIL SETTLEMENT CASE

Define a soil settlement case U1. Select point A09 and invoke Insert > Xtra Data > Imposed Support Displacement.Enter the values on the Imposed Support Displacement dialog as displayed below and press OK:


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18 DEFINE A SEISMIC WAVE PROPAGATION CASE

AutoPIPE allows the user to select a thermal case which can be modified to update the temperature for that

thermal case as an equivalent rise in temperature due to seismic wave propagation. Invoke Load > Seismic Thermal

Loadto modify a thermal case to act as an equivalent seismic wave propagation case. Make the changes on the

Generate Seismic Thermal Load Case as displayed below and press OK:

Observe that the temperature for the soil points for thermal case T1 are updated to the ambient + dT in the

Pres/Temp/PipeID grid of the Review Component Data grid.

19 DEFINE STATIC ANALYSIS SET

Now define the load cases for the analysis set to be used in stress summary. Invoke Load > Static Analysis Setstodisplay the Analysis Sets dialog. On the static analysis sets dialog, define the soil stiffness set to be used for the

analysis along with other properties. Double click analysis set 1 to edit the load case definition for this analysis set.

Make the changes on the Static Analysis Load Cases dialog as displayed below and press OK.


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Press OKon the Nonlinear Analysis dialog which is displayed without making any changes:

Press OKon the Analysis Sets dialog and press Yeson the Confirm dialog to run the analysis on the model.


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Click Yeson the Confirm dialog to review consistency check warning messages for the model. Observe the

consistency checks regarding the thickness for both the bends in the model.

For the consistency check, the following warnings are expected:

*** GLOBAL CONSI STENCY MESSAGES ***

* * * W A R N I N G - MODEL * * *W2164-66: For f ol l owi ng bend poi nt( s) "t he mi ni mumwal l t hi ckness of t hemi t ered el bow segment s s hal l be at l east 1. 22 t i mes mi ni mumf abri cat ed t hi ckness of att ached pi pe".

A04, A06

* * * W A R N I N G - MODEL * * *W726-7: Pi pe di ameter change wi t hout a r educer at f ol l owi ng poi nt( s)

A02

No err or 3 Warni ng( s)

Finally press OKon the Analyze All dialog to run the analysis.


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20 REVIEW DEFAULT CODE COMBINATIONS FOR HDPE

Next, review the default HDPE code combinations and create default Seismic Induced Stress combinations. Invoke

Tools > Combinations...to invoke the Load Combinations dialog. Click on the Code Comb. tab and the following

dialog shall be displayed:

Note: To view code combinations only meant for HDPE, click the Combination Optionbutton and select "Show only

HDPE combinations".

To be able to define HDPE Seismic Induced Combinations, select the required load cases for the combinations

using the "Seismic Induced Combinations" dialog. Click on the "Seismic Combs." button to invoke the "Seismic

Induced Combinations". Update the dialog as shown below to define a single Seismic Induced Combination using

T5 as the Equivalent Seismic Wave Propagation cases, S1 as the Seismic Anchor Movement Case, and U1 as the Soil

Settlement case. Also, check the "Reset load combinations" to reset the default load combinations to include the

Seismic Induced combination as well.


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The Seismic Induced combination shall be added to the default code combinations:

Note: Up to four seismic induced combinations can be defined using the dialog above. More seismic induced

combinations may be defined by duplicating an existing combination and changing the load cases in the duplicate

load combination.

The allowable values for all the combinations are calculated automatically. To override the automatic allowable

with a user defined value, uncheck the Auto Update check box for the combination and enter the desired

allowable value under Allowable Stress column. Update the allowable stress for "Circ. Comp-HDPE{1}" fromAutomatic to 340 psi as shown below:

Press OKto close the Code Combinations dialog.


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21 SETTING HDPE BURIED PIPE RESULT OPTIONS

Some of the properties which are used in the calculations can be controlled by the Buried Pipe Result Options.

Invoke Tools > Model Options > Buried Pipe Result Options. User can select the soil parameters set to be used for

calculation of categories which require soil properties on the Generaltab of the Buried Pipe Result Options. Enter

the information on the dialog as displayed below and press OK:

There are additional options for setting the modulus case and allowable cases for HDPE piping under the HDPE

Pipingtab of the Buried Pipe Result Options dialog. Enter the information as displayed below and press OKon the

Buried Pipe Result Options dialog:


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Note: If None is selected for any of the cases under HDPE Piping, AutoPIPE will use the Modulus/Allowable at

ambient temperature for that case.


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22 SETTING MODEL RESULT OPTIONS

You can set the Result Model Options by invoking Tools > Model Options > Result. The Result Model Options will

allow you to select different options like 'Use nominal thickness', 'Use nom. thk. for Hoop'etc. Enter the

information on the Result Model Options as displayed below and press OK:

Note: Some of the options on the Result Model Options may not be applicable to HDPE piping.


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23 GENERATE OUTPUT REPORT

Finally, you can generate an output report by invoking Result > Output Report. Edit the options on the Batch

Report dialog as displayed below and press OKto generate output report:

The output report will display the selected sections. Some sections from the generated output report are displayed

below:

Code Compliance Combinations:


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Code compliance:


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Result Description:

Code compliance report:


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Result summary:

You can compare the archive for the model created through this walkthrough example

(ASME_B311_With_HDPE_Rev0.DAT) and the output report generated for that model

(ASME_B311_With_HDPE_Rev0.OUT) with the output for the model generated after running this tutorial.


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24 VIEW CODE STRESS COLOR PLOTS

You can view color plots for the code stresses generated by the stress summary by invoking Result > Code Stresses.

Enter the information on the Code Stresses dialog as displayed below and press OKto view the color plot for all

HDPE code stresses as per the selected stress summary:

Clicking on a point will display the maximum stress or ratio at that point for the selected stress summary as

displayed below:

Moreover, you can also see all the code stresses at selected point by going through the Stresses dialog:


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Press the Escapekey to close down the color plot view.


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25 VIEW CODE STRESS ON THE RESULT GRID

You can review the stresses in the model along with the color plot using the Result Review dialog. Invoke the

Result Review dialog by invoking Result > Grids. Click on the "Code Stresses (CC N-755-1)" tab and make the

selections on the dialog as below to view the stresses for the categories at each point:

Close the Result Review after reviewing the results dialog.

Note: AutoPIPE provides the functionality of exporting the result grid or the model input grid to the user. Use the

options under File > Export to export your data to different formats.

26 COMPARISON OF RESULTS WITH CALLAWAY REPORT

We can now compare AutoPIPE results for selected categories with the results provided for HDPE pipe with similar

properties in the Callaway Plant report. Some of the values given below depends on the Modulus value used and

height of water on top of pipe. Values with both height of water on top of pipe taken as zero and taken as 11 feet

(as provided in the report) are compared with the results below:

StressCallaway result

AutoPIPE (No water above pipe)AutoPIPE (Water table 11' above

pipe)

Compression

of Sidewalls67.6 psi / 340 psi 67.6 psi / 340 psi 90.3 psi / 340 psi

Ring

Deflection0.72 in / 1.44 in 0.725 in / 1.48 in 0.9853 in / 1.48 in

Buckling due

to External

Pressure

19.0 psi / 132 psi 14.2 psi / 145.8 psi 19.0 psi / 131.4 psi

In order to obtain results for AutoPIPE (Water table 11 above pipe), set the Height of Water on top of Pipe for

SAND01 to 132 inches (11 feet). Refer to section 14 if needed:


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27 CALCULATIONS FROM ULNRC-05553

The following pages contain hand calculations for the above piping model, used in the Callaway Nuclear

Generating Station.

Documents

Tutorial-Asme b311 With Hdpe