PV Elite and CodeCalc

PV Elite and CodeCalc Verification and Quality Assurance Manual

Version 2014 (16.0)

November 2013

DICAS-PE-200110E

2 PV Elite and CodeCalc Verification and Quality Assurance Manual

Copyright

Copyright 1993-2013 Intergraph CAS, Inc. All Rights Reserved. Intergraph is part of Hexagon.

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PV Elite and CodeCalc Verification and Quality Assurance Manual 3

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Contents Introduction .................................................................................................................................................. 7

Intergraph CAS Quality Assurance ........................................................................................................... 9

Software Purpose.................................................................................................................................... 9 Intellectual Property Statement ............................................................................................................... 9 Management/Organization .................................................................................................................... 10 PV Elite Development ........................................................................................................................... 10 User Documentation ............................................................................................................................. 10 Product Support .................................................................................................................................... 11 Software Issue Tracking/Resolution ..................................................................................................... 11

Software Verification ................................................................................................................................. 13

Test Control ........................................................................................................................................... 13 Beta Tests ............................................................................................................................................. 14 Additional Manual Checks for Staff and Beta Users ............................................................................. 15 PV Elite Test Jobs ................................................................................................................................. 19 Corrective Action Standard ................................................................................................................... 20 Post-Development Procedures ............................................................................................................. 20 Distribution Control ............................................................................................................................... 21 Pre-Shipping Procedures ...................................................................................................................... 21 CodeCalc QA Checks ........................................................................................................................... 23

Introduction ..................................................................................................................................... 23 Shell and Head Checks .................................................................................................................. 24 Nozzle Checks ................................................................................................................................ 26 Flange Checks ................................................................................................................................ 28 Cone Checks .................................................................................................................................. 31 Floating Heads Checks .................................................................................................................. 32 Horizontal Vessel Checks .............................................................................................................. 34 Leg and Lug .................................................................................................................................... 34 ASME Tubesheets Checks ............................................................................................................ 36 TEMA Tubesheets Checks ............................................................................................................. 37 WRC 107 Checks ........................................................................................................................... 38 Pipe and Pad Checks ..................................................................................................................... 39 Base Ring Checks .......................................................................................................................... 39 Half-Pipe Check .............................................................................................................................. 40 Large Opening Checks ................................................................................................................... 41 Rectangular Vessel Checks ........................................................................................................... 42

PV Elite Sample Benchmark Problem Sets .......................................................................................... 45 Problem 1 - Natural Frequency Calculation ................................................................................... 45 Problem 2 - Example of Stiffening Ring Calculation ...................................................................... 49 Problem 3 - Nozzle Reinforcement, Weld Strength, Weld Size ..................................................... 52 Problem 4 - Vessel under Internal and External Pressure on Legs ............................................... 65 Problem 5 - Vertical Vessel with Wind and Seismic Loads ............................................................ 74 Problem 6 - Comparison against CAESAR II ................................................................................. 83 Problem 7 - ASME Section VIII Division 2 Sample Comparisons .................................................. 86 Problem 8 - EN-13445 Nozzle Reinforcement ............................................................................... 93

Contents


Index ......................................................................................................................................................... 101


S E C T I O N 1

The PV Elite/CodeCalc

Verification and Quality Assurance Manual provides a standard set of

PV Elite/CodeCalc jobs that are used in verifying both the operation of the software and the accuracy of the result for each release of the PV Elite/CodeCalc package. The examples presented in this manual are a representative cross-section of the jobs run by Intergraph CAS. The jobs selected for this manual compare the PV Elite/CodeCalc output with results published in industry journals and with results from other software products. The PV Elite/CodeCalc output is (also) verified with hand and/or MathCad calculations.

The component-analysis part of PV Elite, when sold separately, is called CodeCalc. CodeCalc-specific results can be found in the Software Verification section of this manual. In all other sections, the software is referred to simply as PV Elite.

This manual consists of two major sections: Intergraph CAS Quality Assurance and Software Verification.

Intergraph CAS Quality Assurance describes the quality assurance procedures employed by Intergraph CAS to ensure that PV Elite is producing correct results.

Software Verification explains a series of benchmark jobs that you can use to confirm software accuracy. These jobs compare PV Elite output to published results, to output from similar software, or to hand calculations. For each job in this section, a brief description of the job and any special considerations are discussed. Following the discussion is a graphical representation of the system with selected result comparisons. Because of the volume of output, important results like required thickness, maximum allowable working pressure (MAWP), and stress are listed in tables. Users interested in the entire output can re-analyze the jobs as necessary.

The PV Elite development team is constantly testing and adding new test jobs to the QA benchmark problem set. Currently, there are more than 250 test jobs run which test thousands of different calculations. It is impractical to include all of these tests in this manual. As new Quality Assurance procedures are published, they will be incorporated into the QA methods employed by Intergraph CAS. Users with questions, comments, or suggestions are encouraged to contact Intergraph CAS to discuss future revisions to this document. User requests for new features are always welcome. By working with the user, the PV Elite development staff will continue to develop a product that best meets the demands of pressure-vessel design and analysis users.

Introduction

Introduction



S E C T I O N 2

Software quality assurance is generally a speculative pursuit because, no matter how much testing is performed, the next test may reveal an error in the software. The goal of any quality assurance standard is to perform enough testing to achieve such a level of confidence in the software that errors are rare and unlikely. With this objective in mind, several organizations have published guidelines for use in software quality assurance.

In This Section Software Purpose .......................................................................... 9 Intellectual Property Statement...................................................... 9 Management/Organization ............................................................ 10 PV Elite Development .................................................................... 10 User Documentation ...................................................................... 10 Product Support ............................................................................. 11 Software Issue Tracking/Resolution .............................................. 11

Software Purpose PV Elite is a package of nineteen applications that work together to design and analyze pressure vessels and heat exchangers. The purpose of the software is to provide the mechanical engineer with easy-to-use, technically sound, well-documented calculations that will expedite and simplify vessel-design and re-rating tasks. The software also provides recent, industry-accepted analyses of the designs.

Calculations in PV Elite are based on the latest editions of national codes such as the ASME Boiler and Pressure Vessel Code, or other relevant industry standards that are not covered directly by ASME VIII-1, VIII-2 or other codes.

Intellectual Property Statement This manual and its contents should be considered proprietary. This material should not be copied or distributed to other parties without the expressed written consent of Intergraph CAS.

Intergraph CAS Quality Assurance



Management/Organization At Intergraph CAS, the Chief Architect, Software Engineering Manager, and Product Manager oversee the development and testing of the software product. Software development team members include: engineers, software developers, and a technical writer. All members of the development team support customers and test the software prior to each release. Specialized technical support representatives work closely with the development team. In addition, an on-staff, certified Nuclear Quality Assurance (NQA) lead auditor oversees the quality assurance program followed by the team.

PV Elite Development Intergraph CAS is wholly responsible for all software made available to the public that bears the Intergraph label on the distribution media.

Changes to PV Elite are made by or with the consent of the Product Manager. Additional members of the software team include engineers, who interact at the same level and communicate directly with the product manager. Therefore, all software issues can be brought to the attention of Product Manager quickly and easily.

Software engineers each bring a different kind of expertise to the team and write routines for specialized functions in the software. For example, the source code to perform structural steel checks may be written by an engineer at Intergraph CAS whose educational background permits him to do this efficiently.

All members of the development staff provide customer support for PV Elite, directly or indirectly. One member of the team is tasked with quality assurance procedures for each release.

User Documentation The PV Elite user has online access to documentation spanning all facets of the software, including all of the ancillary processors and interfaces. The standard PV Elite documentation set consists of the following documents:

PV Elite User's Guide

CodeCalc User's Guide

Quick Start Guide

All of these documents can be accessed online, from the Help tab in PV Elite. The PV Elite documentation accompanies each new version of the program and is supplied in both PDF and CHM (online help) formats.

Contact information for Intergraph CAS is included in these documents, as well as displayed in the help system, and in a variety of other locations in the software. We encourage users experiencing problems or confusion with the software to reference the documentation first, and then contact us for further resolution and suggestions.



Product Support Intergraph CAS welcomes input/suggestions from our users. Users having problems with our software may freely contact Intergraph CAS through our eCustomer support system, which is found on our company website.

Our Technical Support staff may ask users with a numerical/computational issue in PV Elite to submit the job to Intergraph CAS. This allows our support staff to identify the problem and locate the cause, and then contact the user for resolution.

Software Issue Tracking/Resolution PV Elite supports standard practices for tracking released software issues, including:

Incorporating user feedback directly back into the development process.

Notifying users regarding hot fix or service pack updates issued throughout development

Following software release criteria based on issue review and prioritization.


S E C T I O N 3

This section describes the test methods through which PV Elite software team performs Quality Assurance testing on PV Elite. In addition, the section describes test methods that you can implement to validate your PV Elite program data against industry-standard benchmarks.

In This Section Test Control ................................................................................... 13 Beta Tests ...................................................................................... 14 Additional Manual Checks for Staff and Beta Users ..................... 15 PV Elite Test Jobs ......................................................................... 19 Corrective Action Standard ............................................................ 20 Post-Development Procedures ...................................................... 20 Distribution Control ........................................................................ 21 Pre-Shipping Procedures ............................................................... 21 CodeCalc QA Checks .................................................................... 23 PV Elite Sample Benchmark Problem Sets ................................... 45

Test Control Currently in the United States there is no organization that formally establishes the credibility of pressure-vessel analysis software. Therefore, software suppliers take on this responsibility.

Generally, there are two ways to establish that any software product is performing correctly:

Comparing product results to hand calculations.

Comparing results to previously verified results from an external source.

If these methods compare favorably to software-generated results, then the software is assumed to be performing as expected. If the results do not compare favorably, the PV Elite development team identifies the differences and corrects the problem.

Testing Process

Before a new version of PV Elite is released, the development personnel perform alpha-level testing. This involves checking the Fortran/C++ or assembler code and running of basic test problems designed to test the functionality of the feature addition, error and abort conditions, and so forth. Next, the development staff generates a series of alpha jobs that:

Test new features against existing software.

Run tests against industry standard programs, such as Compress and BJAC teams.

Suggest to customers that they independently compare the results of PV Elite against their own in-house program or spreadsheets.

Test new features against hand calculations.

Test new features against published literature, such as the ASME VIII-1, PTB-3, and other codes.

Software Verification



Test the interaction between new features and features already existing in the software.

Once these selected alpha jobs are run and verified to the satisfaction of the lead developer, beta series testing begins.

The new job results are compared to the previously verified results. Program errors that have been identified are remedied and/or justified.

To summarize, at Intergraph CAS, we believe that thoroughly checking software results by hand and comparing these results to those of other software and to benchmarks assures a quality product. This method has worked very well in the past and we will check new versions using this same methodology.

Beta Tests Often before releasing the PV Elite software, we distribute the alpha-tested software to users to perform beta testing. At the end of the test period, we ask that beta users send evaluations to us, so that we can process the information, resolve any issues found, and archive feedback.

The following are the beta test files for the CodeCalc module available from within PV Elite. Intergraph CAS ships some of these files with the PV Elite software.

Beta Test Files

Checks.cci Shell.cci

Extra_qa.cci Texample.cci

Fexample.cci Texample2.cci

Fexample2.cci Vesexmpl.cci

Lg_nozzl.cci WRC107.cci

Lg_nozzl.cci Rctexmpl.cci

Mm_wrc.cci Appy.cci

ASME_Tubesheet.cci

The following section discusses manual checks that users can perform additional verification of the software.



Additional Manual Checks for Staff and Beta Users The tables below display a list of items that should be verified for each release of PV Elite. Different individuals should check each item multiple times.

Installation Checklist

Items to Check Initials Initials Comments

A. Program Installation

B. File Extraction

C. File CRC Check

Database Access Checklist


A. Structural Steel - AISC89.BIN

B. ASME Materials *

1. Check some material properties (selected randomly) with ASME Code

2. Check yield stress vs. temperature table.

* Specify different material ID in the input, and check the allowable stresses, density, TEMA number, and external pressure chart.

Units Checklist


A. Creation of input files

B. Verify change of units

Check each input field of the following modules to verify that the help facilities function properly.

Help Checklist


A. Check Modules




1. Shells and Heads

2. Nozzles

3. Flange

4. Conical Sections

5. Floating head

6. Horizontal Vessels

7. ASME Tubesheets

8. Tubesheets

9. WRC107/FEA

10. Leg and Lug

11. Pipe and Pad

12. Base Rings

13. Thin Bellows Exp. Joints

14. Thick Joints

15. Half-Pipe

16. Large Openings

17. Rectangular Vessels

18. WRC 297/Annex G

19. Appendix Y

B. Check HELP Index.

C. Search on a topic.

D. Print a HELP topic.



New Input Generation/General Operation Checklist


A. Check each module with a random example.

1. Shells and Heads

2. Nozzles

3. Flange

4. Conical Sections

5. Floating head

6. Horizontal Vessel

7. ASME Tubesheets

8. TEMA Tubesheets

9. WRC 107

10. Leg and Lug

11. Pipe and Pad

12. Base Rings

13. Thin Joints

14. Thick Joints

15. Half Pipes

16. Large Openings

17. Rectangular Vessels

18. WRC 297

19. Appendix Y

B. Graphics

1. Onscreen

2. Printed




C. Window operation

1. Merge operation

2. Insert/Delete an item

3. Add an item

4. Browse items

Output Review Checklist


A. Review output data in

1. Terminal

2. Printer

3. Disk file

B. Output Processor

1. Results on screen

2. Print the selected chapters

Operating Environments Checklist


A. Dealer Version

B. Windows

C. Network

1. PV Elite and data on network

2. PV Elite on network, data local

3. PV Elite local, data on network



Vessel Code Checklist


ASME Section VIII, Div. 1

ASME Section VIII, Div. 2

PD-5500

EN - 13445

Miscellaneous Checklist


A. ESL/SPLM (a)

B. Mouse Operations

C. Material Database Editor

1. Editing materials

2. Adding materials

(a) Insures program does not run without the ESL.

PV Elite Test Jobs The PV Elite QA benchmark problem set consists of over 250 different analysis jobs. Each of these jobs is run prior to release time and compared with the results from previous versions. A wide variety of jobs are checked, which includes tests of all wind and seismic codes, checks of baserings, weights, stresses, liquid pressures, MAWP, weights, volumes, required thickness and many others. By analyzing these jobs, the quality of the software is kept very high and consistent. Again, these are just a few sample problems run every time we test the software. Many of the jobs contained in this manual are listed in the table below.

Quality Assurance Test Form

Job Name Perform Analysis Analysis Date

104EX4

11436

ANDY1

APP1_7



Job Name Perform Analysis Analysis Date

APP1_7_2

APP1_7_3

APPLCHK

AS_450V2

BEDN237

+200 more jobs

Corrective Action Standard PV Elite users have many channels through which they can reach the Intergraph CAS development staff. The main way to contact us is through the eCustomer system. When a problem or error is detected, the development staff reviews the problem and takes corrective action. When a user problem is verified to be a defect, a TR (trouble report) is filled out using internal Intergraph software. After the TR is completed, the problem is fixed, and the user is notified by email through the eCustomer system. Updated PV Elite files are made available in a product Hot Fix or Service Pack, which can be downloaded from the eCustomer website. In many cases, software issues have workarounds. The Intergraph CAS technical support staff notifies users of workarounds whenever possible.

Post-Development Procedures After a new version of the software has been developed, Intergraph CAS uses the following quality assurance procedures to ensure that the new CDs are correct in content, contain the proper ESL protection schemes, and can be reproduced properly.

1. Scan the development machine for virus infection before producing any distribution set. Use the latest version of Trend Micro Office Scan virus-scanning software.

2. Assemble in a "clean" directory all of the files that comprise the installation set. This includes .EXE files, database files, and example files.

3. Run the CRCCHK program to build the CRC verification file.

4. Generate an installation program using Install Shield. Once the DVD is made, test it according to the Distribution Control procedures outlined below.



Distribution Control To control the distribution and integrity of the program DVDs before sending them out for mass production, Intergraph CAS adheres to the following procedures:

1. After the quality assurance procedures have been completed, use the lead developer's computer to make a production copy of PV Elite.

2. Modify the installation program to load any new executables that may be released with the new version.

3. Load PV Elite onto at least one PC in the production department to check the installation program and DVD integrity.

4. Use Office Scan virus-scanning software to scan each original, all disk drives, and memory for known viruses.

5. Using the appropriate ESL, install and test the masters on another computer. All EXE files accessing the ESL must be tested.

6. Install the masters on a production computer for further use. ESL-specific files should be copied into the appropriate subdirectories for organizational purposes.

7. Send the masters to the DVD duplicator.

8. Install the software from the DVD onto each of the PCs in the engineering and development groups at Intergraph CAS.

9. Load the required set of PV Elite executables onto at least one computer in the production department.

10. Using the DVD and installation checklists, perform periodic testing of the software as necessary.

The following section provides the tasks that must be performed by the development and production personnel to verify the quality of disk sets before shipment.

Pre-Shipping Procedures The following procedures help to ensure that the disk sets shipped by Intergraph CAS contain the correct product, are not infected with a virus, and are void of imperfections.

1. When DVDs are received from the duplicator, install and test a random selection from the batch. These final tests will ensure that the DVDs were correctly assembled by the duplicator, that they are not flawed, and that the ESL interaction routines are in order.

The tests are software-specific and are detailed elsewhere in this manual. None of these tests should use the environment support available from the programs. Run the tests from the installation directory. Ensure that the installation directory is empty before beginning this procedure.

2. Archive a set of DVDs from the first duplication for future use and referral.


S E C T I O N 4

CodeCalc QA Checks

In This Section Introduction .................................................................................... 23 Shell and Head Checks ................................................................. 24 Nozzle Checks ............................................................................... 26 Flange Checks ............................................................................... 28 Cone Checks ................................................................................. 31 Floating Heads Checks .................................................................. 32 Horizontal Vessel Checks .............................................................. 34 Leg and Lug ................................................................................... 34 ASME Tubesheets Checks ............................................................ 36 TEMA Tubesheets Checks ............................................................ 37 WRC 107 Checks .......................................................................... 38 Pipe and Pad Checks .................................................................... 39 Base Ring Checks ......................................................................... 39 Half-Pipe Check ............................................................................. 40 Large Opening Checks .................................................................. 41 Rectangular Vessel Checks ........................................................... 42

Introduction

This section provides the results of QA tests for CodeCalc, which is also the component-analysis part of PV Elite. For simplicity, this part of PV Elite will be referred to as CodeCalc in this chapter. The following CodeCalc modules have been subjected to Intergraph CAS quality assurance procedures.

Shell/Head

Nozzle

Flange

Cone

Floating Head

Horizontal Vessel

Leg and Lug

ASME Tubesheets

TEMA Tubesheets

WRC 107/537

Pipe and Pad

Base Ring

Thin Joint

Thick Joint



Half-Pipe

Large Opening

Rectangular Vessel

Shell and Head Checks

As a part of its quality assurance procedures, Intergraph CAS completed the following shell and head checks on CodeCalc:

ASME Appendix 1-4, 2 (CodeCalc job: Checks.cc2/ASME VIII-1 2011a, APP 1, 1-4, 2) - Ellipsoidal head under internal pressure.

Parameters CodeCalc ASME

MAWP (psi) 338.87 339

ASME Appendix 1-4, D (CodeCalc job: Checks.cc2/ASME VIII-1 2011a, APP 1, 1-4, D) -Torispherical head under internal pressure


Req. thickness (in.) 0.4488 0.45

ASME Appendix 1-4, D2 (CodeCalc job: Checks.cc2/ASME VIII-1 2011a, APP 1, 1-4, D2) -Torispherical head under internal pressure


MAWP (psi) 167.16 167

ASME Appendix L-6.1 (CodeCalc job: Checks.cc2/ASME VIII-1 2011a, APP L, L-6.1) - Ellipsoidal head under external pressure


A 0.0004623 0.000462

B 5662.91* 5100

EMAWP (psi) 20.9427* 18.9

ASME Appendix L-6.2 (CodeCalc job: Checks.cc2/ASME VIII-1 2011a, APP L, L-6.2) -Torispherical head under external pressure




A 0.0004157 0.00042

B 5092.85* 4700

EMAWP (psi) 16.9385* 15.6

ASME Appendix L-6.3 (CodeCalc job: Checks.cc2/APP L, L-6.3) -Hemispherical head under external pressure


A 0.0004623 0.00046

B 5662.91* 5200

EMAWP (psi) 20.9427* 19.23

ASME Appendix L-6.4 (CodeCalc job: Checks.cc2/APP L, L-6.4) - Conical head under external pressure


Design Len. 102.30 102.30

A 0.0005912 0.0006

B 7004.29 6900

EMAWP (psi) 38.1777 37.5

ASME Appendix L-9.2.1 (CodeCalc job: Checks.cc2/APP L, L-9.1, 2) - Minimum design metal temperature (MDMT) of a cylinder


Unadjusted MDMT (F) 31 31

Adjusted MDMT (F) 12 12

ASME Appendix. L-5 (CodeCalc job: Checks.cc2/APP L, L-5): Selection of a circumferential stiffening ring for a cylinder under external pressure. A bar type 2 in. x 3.75 in. stiffening ring selected.




Moment of Inertia (in. 4) 16.541 16.57

Required Moment of Inertia (in.

4)

16.1933 16.25

Weld load 643.78 644

Weld Allowable load 1828.75 1830

Minimum Weld Thickness 0.25 0.25

* As of this printing the ASME Appendix L6.1, 6.2, 6.3 appear to be in error in determining the B value from the External Pressure chart CS-2 for SA-285C, with E = 24.5 x 106 psi. When points lie in the linear portion of the chart CS-2 (as in cases 4, 5, 60, CodeCalc uses the formula B = A*E/2.

Nozzle Checks

Nozzle checks involve the area of reinforcement and failure path calculations. Intergraph CAS performed the following nozzle checks using CodeCalc:

ASME Appendix L-7.3b (CodeCalc Job: Checks.cc2/APP L, L-7.3B): Insert-type Nozzle lying on a longitudinal weld of a cylindrical shell. A 19-in. Diameter and 0.5-in. thick reinforcement pad is selected.


Req. Thk. Shell (in.) 0.5300 0.530

Req. Thk. Noz (in.) 0.0893 0.0893

Reinforcement Area Req. (in.2) 6.228 6.23

Total Area available (in.2) 6.267 6.27

Total weld load, W (lb) 72539.17 72600

Weld load for path 1-1, W1-1 (lb) 71556.86 71600



Strength of failure path 1-1 (lb) 203289 203000





ASME Appendix L-7.4 (CodeCalc Job Checks.cc2/APP L, L-7.4): Abutting-type Nozzle on a cylindrical shell. A 26-in. Diameter and 2.75-in. (average value) thick reinforcement pad is selected.


Req. Thk. Shell (in.) 1.8593 1.83

Req. Thk. Noz (in.) 0.3542 0.292



Total weld load, W (lb) 317668.22 318000



ASME Appendix L-7.6 (CodeCalc Job Checks.cc2/APP L, L-7.6): Insert-type Nozzle without pad on a 2:1 ellipsoidal head.


Req. Thk. Head (in.) 0.0912 0.091

Req. Thk. Noz (in.) 0.0512 0.051



Total weld load, W (lb) 302.43* 250





*The differences in dimensions, of the order of 1E-3, are magnified after being multiplied by the allowable stress.

ASME Appendix L-7.7 (CodeCalc Job Checks.cc2/APP L, L-7.71): Abutting-type Hillside Nozzle on a cylindrical shell.




Req. Thk. Shell (in.) 1.1364 1.14

Req. Thk. Noz (in.) 0.1389 0.139

Area Req. in circumferential dir. (in.

2)

3.720 3.68

Area available in circumferential dir. (in.

2)

7.486 7.16

Area Req. in longitudinal dir. (in.

2)

4.545 4.56

Area available in longitudinal dir. (in.

2)

2.607 2.59

The area available in the longitudinal direction is insufficient. The new area values after increasing the nozzle thickness from 0.5 in. to 0.875 in.


Area Req. in longitudinal dir. in.2) 4.545 4.56

Area available in longitudinal dir. (in.

2)

5.198 5.18

Minimum Weld throat. (in.2) 0.25 0.25

Actual Weld throat. (in.2) 0.3535 0.35

Flange Checks

Intergraph CAS completed the following flange checks on CodeCalc:

Taylor Forge, Bulletin 502 (CodeCalc Job: Checks.cc2/TAYLOR FORGE)- Integral weld neck flange.

Parameters CodeCalc Taylor Forge

Gasket Reaction Diameter, G (in.) 33.888 33.88

Operating

Bolt Load WM1 (lb) 432484.688 432484

Gasket Seating Force, HG (lb) 71713.25 71713

End Pressure, MD (in. lb) 623292 623292




Face Pressure, MT (in. lb) 79248 79242

Gasket Load, MG (in. lb) 111600 111599

Total Moment, Mo (in. lb) 814128 814133

Longitudinal Hub Stress (psi) 22865.0 22865

Radial Flange Stress (psi) 10981.8 10982

Tangential Stress Flange (psi) 6799.5 6800

Seating

Bolt Load, WM2 (lb) 120608.648 120609

Flange Design Bolt Load, W (lb) 464192.38 464192

Total Moment, MG (in. lb) * 722364 722371



Tangential Stress Flange (psi) 6033.1 6033

*Total Moment is MG in the Taylor Forge bulletin 502 and MA in CodeCalc output.

Taylor Forge, Bulletin 502 (CodeCalc Job: Checks.cc2/ FULL FACE SLIP)- Loose, Slip on Flange with a full face gasket.


Dist. to Gasket Load Reaction hg, (in.) 1.328 1.325


Full Face ID Pressure Load, HGY (lb) 48614.715 48555

Operating

Bolt Load, WM1 (lb) 96302.469 96286




Total Moment, MO (in. lb) 110676 110695






Tangential Flange Stress (psi) 13470.3 13176

Bolt Circle Stress (psi) 2585.7 2679

Seating

Bolt Load, WM2 (lb) 71806.469 23196


Reverse Moment MG (in. lb) * 29160 29101

*Reverse Moment is MG in Taylor Forge bulletin 502 and MR in CodeCalc output. See "Notes" below.

a. The value of hg, in the Taylor Forge Bulletin is off by 0.0029, using

With C = 29.5 in. and B =24 in. this comes out to be 1.3279 and not 1.325. This error is magnified resulting in error in the calculations of G, WM1, W, H

G, MT, MO, MG, and HGY.

b. The value of WM2 computed in the Taylor Forge Bulletin is incorrect,

Where b = 1.375, y = 200

Gives WM2 = 71806.5

An example taken from Process Equipment Design by Brownell and Young. (P-243) (CodeCalc Job: Checks.cc2/BROWNELL&YOUNG)- Loose-ring type flange.

*Total Flange Moment is MA in Brownell & Young and RMA in CodeCalc output.

Parameters

CodeCalc

Brownell & Young


Operating

Bolt Load, WM1 (lb) 151790.469 152100





Parameters

CodeCalc

Brownell & Young


Gasket Load, MG (in. lb) 13464 18900

Total Moment, MO (in. lb) 231816 270100

Seating

Bolt Load, WM2 (lb) 96623.617 93600


Total Moment MG (in. lb) * 1806036 140500

Cone Checks

Cone checks involve area-of-reinforcement and moment-of-inertia requirements. Intergraph CAS performed the following cone checks using CodeCalc:

ASME Appendix L-2.3 (CodeCalc Job: Checks.cc2/ASME VIII-1 2011a, APP L, L-2.3): - A cone-to-cylinder transition under internal pressure.


Large end

Line Force, QL (lb) 2749.608 2750

Reinforcement Area Req., Arl (in.2) 12.8802 4.54

Total Area available , Ael(in.2) 0.3490 0.500

Small end

Line Force, QA (lb) 1312.383 1312.5

Reinforcement Area Req., Ars (in.2) 2.2146 2.22

Total Area available, Aes (in.2) 0.7799 0.78

ASME Appendix L-3.3 (CodeCalc File: Checks.cc2/APP L, L-3.3): - A cone-to-cylinder transition under external pressure.


Large end

Line Force, QL (lb) 9.6960 2781

Reinforcement Area Req., Arl (in.2) 12.6509 12.7

Total Area available, Ael (in.2) 23.5682 28.9



Small end

Line Force, QS (lb) 697.3355 696.9

Reinforcement Area Req., Ars (in.2) 0.7046 0.71

Area available in Shell, Aes ( in.2)* 2.5022 2.05*

Area available in Pad (in.2) 2.6250 2.63

Total Area available, Aes (in.2) 5.8318 4.68

The small end available area from the shell does not match as a result of different values of tr, the minimum required thickness of cone at small end. CodeCalc calculates this value iteratively so that the cone can withstand the design pressure.

With, E = 25.125 * 106 psi, A = 4.453 * 10-6, B = 5595.042, D/T = 149.191

CodeCalc computes a tr of 0.392 in., resulting in a MAWP of

which matches the design pressure of 50 psi. The ASME example uses a tr = 0.55 in., which seems incorrect.

Floating Heads Checks

Intergraph CAS completed the following floating heads checks on CodeCalc:

Tested against Exxons in-house design program PEAs- A Type D floating head under both external and internal pressure. (CodeCalc job: Extra_Qa.cc2/TYPE D)

Tubeside Internal Pressure Results:

Parameters CodeCalc PEAs

Operating

Head Req. Thickness (in.) 0.3601 0.360

Flange Req. Thickness (in.) 3.2956 3.296

Operating Bolt Load, WM1 (lb) 302398.0 302398

Gasket Seating Force, HG (lb) 44348.5 44348.4

Flo. Head Moment, Mh (in. lb) -136812 -136739.5

Total Moment, Internal, MO (in. lb) 127584 127660.90

Seating Flange Req. Thickness, Internal Bolt-Up (in.)

3.4527 3.453




Flange Design Bolt Load, W (lb) 335559.0 335559.0

Total Moment, Internal MG (in. lb) * 235939.9 235939.92

Shellside External Pressure Results:


Operating

Head Req. Thickness (in.) 0.6158 0.609


Operating Bolt Load, WM1 (lb) 302398.0 302398

Gasket Seating Force, HG (lb) 430082.6 430082.59

Flo. Head Moment, Mh (in. lb) -228012 -227899.17

Total Moment, MO (in. lb) 141715.56 141604.46

Seating


Flange Design Bolt Load, W (lb) 335559.0 335559.0

Total Moment MG (in. lb) ** 235939.94 235939.92

The results below are for Soehrens Calculations for Stresses in Spherical Heads and Flanges. The following table displays the Nomenclature and Equation Numbers per ASME Paper 57-A-247.

Parameters

CodeCalc Tubeside Int.

Parameter

CodeCalc Shellside Ext.

PEA Shellside Ext.

Ttl Stress at Head OD, psi Eqn. 30

6611.2 6611.218 21175.1 21175.1

Ttl Stress at Head ID, psi Eqn. 31

1202.5 1202.488 -33058.6 -33058.6

Ttl Flange Stress, Upper psi Eqn. 35

746.6 746.647 5081.8 5081.8

Ttl Flange Stress, Lower psi Eqn. 36

-7432.6 -7432.58 -3803.6 -3803.6



Horizontal Vessel Checks

Intergraph CAS completed the following horizontal vessel checks on CodeCalc:

ASME APP L, L-2.2 (CodeCalc job Checks.cc2/ASME PG 530): Insert-type Nozzle lying on a longitudinal weld of a cylindrical shell. A 19-in. diameter and 0.5-in. thick reinforcement pad selected.


Factor K.2 * 0.7906 0.7904

Total weight of the vessel, full (lb) 345837.91 350000

Longitudinal Compressive Shell allowable (psi)

9440.10 9446

The factor k.2 is an important factor used by CodeCalc to compute the stresses using Zick analysis. ASME has used a different method to find the required thickness. Moreover, ASME does not compute shear stresses at the saddles in this example.

Leg and Lug

Intergraph CAS completed the following leg and lug checks on CodeCalc:

Design of legs for a vertical vessel under internal pressure and wind loading, verified by hand calculations (CodeCalc job: ExtraQa.cc2/Hand Check Legs). Angle legs attached in the diagonal orientation (both legs attached to the vessel).

Wind velocity is 100 miles/hr.

Importance factor = 1

Force coefficient = 1

Exposure category = C

Parameters CodeCalc Hand Check

Wind Pressure (psf) 28.038 28.88

Total Wind Force (lb) 1345.848 1376.7

Shear at Top of Leg (lb) 530.53 542.02

Total Overturning Moment at Top of Legs (ft-lb)

3364.6 3441.85

Axial Compression on Leg

Furthest from Neutral Axis (psi)

910.71 915.76



Unity Check on the Legs:

Parameters CodeCalc Hand Check

Actual Allowable Actual Allowable

Weak Axis Bending Stress (psi) 16384.77 24227.28 16723.5 24227

Strong Axis Bending Stress (psi)

11613.22 24227.28 11869 24227

Axial Compressive Stress (psi) 910.71 16053.99 915.7 16068

Unity Check Ratio 1.212 1.237

Design of a support lug for a vertical vessel. Taken from the Pressure Vessel Design Handbook by Bednar, 2nd edition (page 154) example 5.1 (CodeCalc job: Lugs.cc2/BEDNAR EX. 5.1).

Parameters CodeCalc BEDNAR

Force on One Lug, F (lb) 41,000.64 41,000

Bending Stress in the Base Plate (psi)

13,814.78 18,700

Gusset Plate Allowable

Compressive Stress, SgaB (psi)

9,785.29 9,885

The bending stress in the base plate s which, is Spl2 in the CodeCalc printouts is calculated as,

This expression is for stress on a rectangular plate under uniform pressure p, with three edges fixed and one edge free. (Formulas for Stress and Strain, Roark and Young, 5th edition page 396.)

With,

Where,

a = 15 in.,

b = 12 in.,

t = 1.125 in.

The factor is taken from a table in Roark and Young for a known of a/b, which in this case is

1.25. The correct value of after interpolating is 0.524, which gives a value of 13580.22 psi.

While Bednar took the next higher value of as 0.72, this results in a different value of .



This example is for the design of a support lug with Full Ring-Girder type reinforcement ring. Taken from the Pressure Vessel Design Handbook by Bednar, 2

nd edition (page 158) example

5.2 (CodeCalc job: Lugs.cc2/BEDNAR EX. 5.2).

Parameters CodeCalc Bednar

Force on one lug (compression side), Flug (lb.)

5000.00 5000

Force acting in the plane of ring, P (lb.)

2500.00 2500

Ring load pt

Bending moment, M1 (lb-in) 29841.55 29900

Tangential thrust, T1 (lb.) 0.00 0.0

Ring mid pt

Bending moment, M2 (lb-in) 42583.66 17062.5

Tangential thrust, T2 (lb.) 1250.00 1250

ASME Tubesheets Checks

These examples follow the 1997 edition of the ASME code.

ASME Part UHX - 20.1.1 (c) (CodeCalc job: ASME_Tubesheet.cc2/UHX-20.1.1): U-tube type heat exchanger with integral tubesheet construction.


Eff. Tube hole dia., d*(in.) 0.7500 0.75

Eff. Tube pitch, p*(in.) 1.1508 1.15

Axial Shell bending Stress, s,b (psi) -17575.04 -17600

ASME Part UHX - 20.2.1 (c) (CodeCalc job: ASME_Tubesheet.cc2/UHX-20.2.1) A fixed tubesheet with tubesheet extended as flange and gasketed channel side. This is compared with ASME UHX 20.2.1, step 10 case 7.


Shell Membrane Stress due to Joint Interaction, sm (psi)

-99.1947 -96.1

Shell Bending Stress due to Joint Interaction, s, b (psi)

-61109 -61100

Shell Stress Summation, s (psi) 61217.12 61200




s, Allow 61500.00 61500

Bending stress (Pres. Only) (psi)

Effective pres. Pe (Temp. only) (psi)

Bending stress (Temp. only) (psi)

TEMA Tubesheets Checks

A fixed tubesheet with the tubesheet extended has a flange and a gasketed channel side. This is compared with B-JAC

TM teams, a heat exchanger design package. (CodeCalc job:

Checks.cc2/COMPARISON).

Parameters CodeCalc B-JACTM

Eff. Shell side design Pres., bend., PSU (psi)

5.664 5.8

Eff. Tube side design Pres., bend., PTU (psi)

55.069 55.1

Req. Thk. Shellside, Trs (in.) 0.8304 0.8205

Req. Thk. Tubeside. Trc (in.) 2.5893 2.524

Equiv. Differential Exp. Pres., PD (psi) -0.488 0.0*

Shell longitudinal stress (Tensile), STSMAX (psi)

44 0.0*

Shell longitudinal stress (Comp.), STSMIN (psi)

278 296

Tube longitudinal stress (Tensile), STTMAX (psi)

12556.94 12772

Tube longitudinal Stress (Comp.), STTMIN (psi)

117.77 0*

Tube to Tubesheet load, WJ (lb) 1355.03 1378

This difference in the value of Pd and stresses is due to different interpretation of factor J,



TEMA suggests that if, (a)

Then, J can be assumed equal to 0, this is used by BJAC. According to some experts J should be taken 0 if,

and (b)

CodeCalc uses this interpretation. Consequently, there are differences in the Pd, the Shell longitudinal tensile stress, and the Tube longitudinal compressive stress values obtained from both the programs.

WRC 107 Checks

This example is a comparison with another computer program, called CompressTM

. This example compares a round solid attachment on a cylindrical shell. (CodeCalc job: Extra_qa.cc2/COMPAR. TO COMP).

Using WRC 107 March 1979 Version

Parameters CodeCalc CompressTM

Beta 0.230 0.23

Total circumferential stress @ Au (psi)

-34281 -30118

Total Longitudinal stress @ Bl (psi) 30083 32407

Total shear stress @ Cu (psi) -92 -92

Stress Intensity, @ Al (psi) 30283 32574

Stress Intensity, @ Bu (psi) 47999 45950

Stress Intensity, @ Cl (psi) 41165 43630

Stress Intensity, @ Du (psi) 58573 51845

Stress Intensity, @ Dl (psi) 40655 43100



Pipe and Pad Checks

A B31.3 intersection area of reinforcement and MAWP calculations tested with MathCad calculations. (CodeCalc Job: Extra_Qa.cc2 /Hand_Calcs).


Req. thk. of header (in.) 0.450 0.449

Req. thk. of branch (in.) 0.194 0.194

Req. reinforcement area (in.2) 3.4855 3.485

Available reinforcement area (in.2) 3.6052 3.604

MAWP of Header (psi) 694.18 694.13

MAWP of Branch (psi) 1385.28 1385.19

Est. MAWP of Assembly (psi) 609.60 609.55

Base Ring Checks

This example is benchmarked with hand calculations. A base ring with a continuous top ring. (CodeCalc job: Checks.cc2/PVHB EXAMPLE).

The following illustrates the comparison of results for a simplified analysis for base ring thickness from Jawad and Farr.

Parameters CodeCalc Hand Calcs

Load per bolt, (lb) 43527.7344 43528

Req. Area/Bolt, (in.2) 1.7411 1.741

Bolt stress, approx. analysis (psi) 18925.10 16413

Concrete stress, operating condition (psi)

813.64 875.31

Basering Thk., simplified (in.) 1.8677 1.937

More accurate analysis using neutral axis shift calculations for base ring thickness, from Singh and Soler.


Bolt stress (psi) 14244.13 12549




Concrete stress (psi) 493.33 478.84

Basering Thk. (in.) 1.4573 1.432

Continuous Top Ring Calculations:


Req. Thk. as fixed beam (in.) 1.7850 1.916

Req. Thk. per Moss (in.) 1.3669 1.467

Gusset Thickness:


Req. Thk. in tension (in.) 0.3286 0.378

Req. Thk. in compression (in.) 0.672 0.672

Skirt Thickness at Operating Condition:


Req. Thk. in tension (in.) 0.3286 0.398

Req. Thk. in compression (in.) 0.2835 0.287

Half-Pipe Check

ASME Appendix EE-3 (CodeCalc Job: Checks.cc2/ ASME EXAMPLE): A cylindrical shell with a half-pipe.


Min. req. thk. of shell, Int. press. (in.) 0.2392 0.24

Max. permissible pressure, P

(Pprime) (psig) 385.3763 366

Longitudinal tensile stress in shell, S

(Sprime) (psi) 6080.0000 6080

Req. half-pipe thk., T (in.) 0.0502 0.050




Min. fillet weld size, Fillet (in.) 0.1180 0.12

Large Opening Checks

Shell with a large nozzle (CodeCalc Job: Checks.cc2/SENIOR GB TEST): Tested against hand calculations performed by a client.

Parameters CodeCalc Hand Calcs.

Longitudinal hub stress, SH* (psi) 19520 19494

Radial flange stress, SR* (psi) 1036 1032

Tangential flange stress, ST* (psi) 10945 10960

Stresses at the head-shell junction,


Longitudinal hub stress, Shs (psi) 13314.04 13161

Radial stress, Srs (psi) 603.63 610

Tangential stress, Sts (psi) 5578.62 5564

Stresses at the opening head junction,


Longitudinal hub stress, Sho (psi) 16997.471 16960

Radial stress, Sro (psi) 902.257 898

Tangential stress, Sto (psi) 9750.84 9759



Rectangular Vessel Checks

ASME APP. 13, 13-17(b) (CodeCalc job: Rctexmpl.cc2/EXAMPLE A2): A rectangular vessel with two long sides having different thickness (sketch A2), designed for internal pressure.


Membrane

Short side plate, (psi) 1242.00 1242

Long side plate, t2 (psi) 488.39 488

Long side plate, t22 (psi) 100.81 101

Bending

Short side plate, @ Q (psi) 2560.62 2571

Short side plate, @ Q1 (psi) 15775.12 15778

Long side plate, @ M (psi) 3679.71 3683

Long side plate, @ Q (psi) 250.06 250

Long side plate, @ M1 (psi) 9556.91 9572

Long side plate, @ Q1 (psi) 6162.16 6153

ASME APP. 13, 13-17(c) (CodeCalc job Rctexmpl.cc2/EXAMPLE A3): A rectangular vessel with uniform wall thickness and corners bend to a radius (sketch A3) designed for internal pressure.

Parameters* CodeCalc ASME

Membrane

Short side plate, @ C (psi) 450.00 450

Long side plate, @ A (psi) 300.00 300

Corner section, (psi) 485.41 485

Bending

Moment at mid pt of long side, Ma (in.-lb)

-2812.6814 -2820

Short side plate, Inner @ C (psi) 10123.91 10084

Short side plate, Outer @ C (psi) -10123.91 -10084

Short side plate, Inner @ D (psi) 5623.91 -5583*

Short side plate, Outer @ D (psi) -5623.91 5583*

Long side plate, Inner @ A (psi) -16876.09 -16927



Parameters* CodeCalc ASME

Long side plate, Outer @ A (psi) 16876.09 16927

Long side plate, Inner @ B (psi) 1123.91 1080

Long side plate, Outer @ B (psi) -1123.91 -1080

Corner section, Inner (psi) 12248.52 12209

Corner section, Outer (psi) -12248.52 -12209

As of this printing, ASME is in error about the stress state at point D. The stress at the point D on the short side is as per ASME Section VIII Div. 1 Appendix 13-7 Equation 29.

With,

MA = -2812.68 in-lb

P = 15 psi

I1 = 0.0833 in4

L1 = 10 in.

L2 = 20 in.

R = 10 in.

For the inner side,

c=ci=0.5

Which gives, (Sb)Di = 5623.91 psi,

while ASME has a stress value of -5583 psi.

ASME Appendix 13, 13-17(g) (CodeCalc job: Extra_QA.cc2/ASME EXAMPLE 13): A vessel of obround cross section, with an I-section reinforcement member welded on, Sketch B2.

Taking the pressure P = 29.9 psi. to get the ASME stress values.


Combined MOI, I11 (in.4) 6.8592 6.859

Membrane

Short side plate, @ C (psi) 978.19 978.32

Long side plate, @ A (psi) 489.09 489.16

Bending

Short side plate, Outer @ C (psi) -15647.72 -15641.75

Long side plate, Outer @ A (psi) 16935.70 16928.78




Total

Short side plate, Outer @ C (psi) -14669.54 -14662.96

Long side plate, Outer @ A (psi) 17424.79 17417.946

ASME Appendix 13, 13-17(i) (CodeCalc job: Rctexmpl.cc2/EXAMPLE C1): A vessel of circular cross section, with a single diametral staying plate, Sketch C1.

These stresses are maximum stresses occurring at the shell-plate junction.


Membrane

Shell section (psi) 800.00 800

Diametral plate (psi) 2.10 2.1

Bending

Shell section, Inner (psi) 8884.12 8856

Diametral plate, Inner (psi) 25140.69 25020

Total

Shell section, Inner (psi) 9684.12 9656

Diametral plate, Inner (psi) 25142.79 25022


S E C T I O N 5

PV Elite Sample Benchmark Problem Sets

In This Section Problem 1 - Natural Frequency Calculation ................................... 45 Problem 2 - Example of Stiffening Ring Calculation ...................... 49 Problem 3 - Nozzle Reinforcement, Weld Strength, Weld Size .... 52 Problem 4 - Vessel under Internal and External Pressure on Legs ....................................................................................................... 64 Problem 5 - Vertical Vessel with Wind and Seismic Loads ........... 74 Problem 6 - Comparison against CAESAR II ................................ 83 Problem 7 - ASME Section VIII Division 2 Sample Comparisons . 86 Problem 8 - EN-13445 Nozzle Reinforcement .............................. 93

Problem 1 - Natural Frequency Calculation

The purpose of this problem is to ensure that PV Elite is computing the fundamental frequency of a vertical tower correctly. This problem is a comparison against the sample presented in Henry Bednars Pressure Vessel Design Handbook, 2nd Edition (Page 126). The result for this problem should be approximately 1.15 sec/cycle or 0.9 hertz.



PV Elite Vessel Analysis Program: Input Data

Natural Frequency Comparison to Bednar p126

Design Internal Pressure (for Hydrotest) 100.00 psig

Design Internal Temperature 200 F

Type of Hydrotest UG99-b

Hydrotest Position Vertical

Projection of Nozzle from Vessel Top 0.0000 in.

Projection of Nozzle from Vessel Bottom 0.0000 in.

Minimum Design Metal Temperature - 1994 F

Type of Construction Welded

Special Service None

Degree of Radiography RT 1

Miscellaneous Weight Percent 0.0

Use Higher Longitudinal Stresses (Flag) Y

Select t for Internal Pressure (Flag) N

Select t for External Pressure (Flag) N

Select t for Axial Stress (Flag) N

Select Location for Stiff. Rings (Flag) N

Consider Vortex Shedding

Perform a Corroded Hydrotest

Is this a Heat Exchanger N

User Defined Hydro. Press (Used if > 0) 0.0000 psig

User defined MAWP 0.0000 psig

Load Case 1 NP+EW+WI+BW

Load Case 2 NP+EW+EQ+BS

Load Case 3 NP+OW+WI+BW

Load Case 4 NP+OW+EQ+BS

Load Case 5 NP+HW+HI

Load Case 6 NP+HW+HE

Load Case 7 IP+OW+WI+BW

Load Case 8 IP+OW+EQ+BS

Load Case 9 EP+OW+WI+BW

Load Case 10 EP+OW+EQ+BS

Load Case 11 HP+HW+HI

Load Case 12 HP+HW+HE

Wind Design Code ASCE-7 93

Basic Wind Speed [V] 0.0000 mile/hr

Surface Roughness Category C: Open Terrain

Importance Factor 1.0

Base Elevation 0.0000 ft.

Percent Wind for Hydrotest 0.0

Using User defined Wind Press. Vs. Elev. N

Damping Factor (Beta) for Wind (Ope) 0.0000

Damping Factor (Beta) for Wind (Empty) 0.0000

Damping Factor (Beta) for Wind (Filled) 0.0000

Seismic Design Code ASCE-7 88

Seismic Zone 0.0000

Importance Factor 1.0000

Soil Type S1

Horizontal Force Factor 2.0000

Percent Seismic for Hydrotest 0.0000

Design Nozzle for M.A.W.P. + Static Head Y

Consider MAP New and Cold in Noz. Design

Consider External Loads for Nozzle Des. N

Use ASME VIII-1 Appendix 1-9 N

Material Database Year 1997

Configuration Directives:

Do not use Nozzle MDMT Interpretation VIII-1 01-37 No

Use Table G instead of exact equation for "A" No

Shell Head Joints are Tapered No

Compute "K" in corroded condition No

Use Code Case 2286 No

Use the MAWP to compute the MDMT No

Using Metric Material Databases, ASME II D No

Complete Listing of Vessel Elements and Details:

Element From Node 10

Element To Node 20

Element Type Skirt Sup.

Description

Distance "FROM" to "TO" 10.000 ft.

Skirt Inside Diameter 60.000 in.

Diameter of Skirt at Base 60.000 in.

Skirt Thickness 0.5000 in.

Internal Corrosion Allowance 0.0000 in.

Design Temperature Internal Pressure 100 F

Design Temperature External Pressure 100 F

Effective Diameter Multiplier 1.2



Material Name SA516-70

Allowable Stress, Ambient 17500. psi

Allowable Stress, Operating 17500. psi

Allowable Stress, Hydrotest 26250. psi

Material Density 0.0010000 lb./cu.in.

P Number Thickness 1.25 in.

Yield Stress, Operating 38000. psi

UCS-66 Chart Curve Designation B

External Pressure Chart Name CS-2

UNS Number K02700

Product Form Plate

Efficiency, Longitudinal Seam 1.0

Efficiency, Head-to-Skirt or Circ. Seam 1.0


Detail Type Weight

Detail ID F

Dist. from "FROM" Node / Offset dist 5.0000 ft.

Miscellaneous Weight 10000. lb.

Offset from Element Centerline 0.0000in.

--------------------------------------------------------


Element To Node 40

Element Type Cylinder

Description


Inside Diameter 60.000 in.

Element Thickness 0.5000 in.


Nominal Thickness 0.0000 in.

External Corrosion Allowance 0.0000 in.

Design Internal Pressure 10.000 psig


Design External Pressure 10.000 psig



Material Name SA-516 70


Efficiency, Circumferential Seam 1.0


Detail Type Weight

Detail ID E

Dist. from "FROM" Node/Offset dist 10.000 ft.


Offset from Element Centerline 0.0000 in.

--------------------------------------------------------


Element To Node 50


Description
















Detail Type Weight

Detail ID C




--------------------------------------------------------




Element To Node 80


Description
















Detail Type Weight

Detail ID B




--------------------------------------------------------


Element To Node 80


Description
















Detail Type Weight

Detail ID B




--------------------------------------------------------


Element To Node 90


Description














Efficiency,. Circumferential Seam 1.0


Detail Type Weight

Detail ID A




PV Elite is a trademark of Intergraph CADWorx & Analysis Solutions, Inc. 2014

Natural Frequency for the Operating Case (No Liquid), Freese Method

Natural Frequency Calculation



| | Element | Centroid | Elem. End | Elem. Ang. | Element

From| To | Total Wgt. | Deflection | Deflection | Rotation | Empty Wgt.

| | lbm | in. | in. | | lbm

-------------------------------------------------------------------------

10 | 20 | 10011.4 | 0.077412 | 0.30044 | 0.0048560 | 10011.4

20 | 40 | 15022.8 | 1.13129 | 2.39547 | 0.012092 | 15022.8

40 | 50 | 10021.7 | 3.91854 | 5.68701 | 0.016406 | 10021.7

50 | 60 | 10021.7 | 7.63959 | 9.72088 | 0.018672 | 10021.7

60 | 80 | 20043.8 | 11.5172 | 13.3188 | 0.018782 | 20043.8

80 | 90 | 20043.8 | 15.1227 | 16.9273 | 0.018798 | 20043.8

The Natural Frequency for the Vessel (Empty.) is 0.90323 Hz.

Natural Frequency for the Operating Case, Freese Method

Natural Frequency Calculation

| | Element | Centroid | Elem. End | Elem. Ang. | Element

From| To | Total Wgt. | Deflection | Deflection | Rotation | Emtpy Wgt.

| | lbm | in. | in. | | lbm

10 | 20 | 10011.4 | 0.077412 | 0.30044 | 0.0048560 | 10011.4

20 | 40 | 15022.8 | 1.13129 | 2.39547 | 0.012092 | 15022.8

40 | 50 | 10021.7 | 3.91854 | 5.68701 | 0.016406 | 10021.7

50 | 60 | 10021.7 | 7.63959 | 9.72088 | 0.018672 | 10021.7

60 | 80 | 20043.8 | 11.5172 | 13.3188 | 0.018782 | 20043.8

80 | 90 | 20043.8 | 15.1227 | 16.9273 | 0.018798 | 20043.8

The Natural Frequency for the Vessel (Ope...) is 0.90323 Hz.

Natural Frequency for the Filled Case, Freese Method

The Natural Frequency for the Vessel (Filled) is 0.48376 Hz.

PV Elite is a trademark of Intergraph CADWorx & Analysis Solutions, Inc. 2014.

Problem 2 - Example of Stiffening Ring Calculation

This sample problem was taken from the ASME Section VIII Division 1 pressure vessel code page 531-532 A-98 addenda. This stiffening ring is a channel welded to the outside of a 169-inch OD vessel. The test here is to compute the required moment of inertia of the ring. The ASME code calculated value for Is (the required moment of inertia) 15.61 in

4. PV Elite obtains

an almost identical result of 16.2 in4. The difference is due to the fact that PV Elite computes the

strain factor A to more significant figures than the code example.



PV Elite Vessel Analysis Program: Input Data

Design Internal Pressure (for Hydrotest) 0.0000 psig

Design Internal Temperature 0 F

Type of Hydrotest Not Specified

Hydrotest Position Horizontal

Projection of Nozzle from Vessel Top 0.0000 in.

Projection of Nozzle from Vessel Bottom 0.0000 in.

Minimum Design Metal Temperature -20 F

Type of Construction Welded

Special Service None

Degree of Radiography RT 1

Miscellaneous Weight Percent 0.0

Use Higher Longitudinal Stresses (Flag) Y

Select t for Internal Pressure (Flag) N

Select t for External Pressure (Flag) N

Select t for Axial Stress (Flag) N

Select Location for Stiff. Rings (Flag) N

Consider Vortex Shedding Y

Perform a Corroded Hydrotest N

Is this a Heat Exchanger N

User Defined Hydro. Press. (Used if > 0) 0.0000 psig

User Defined MAWP 0.0000 psig

User Defined MAPnc 0.0000 psig

Load Case 1 NP+EW+WI+FW+BW

Load Case 2 NP+EW+EE+FS+BS

Load Case 3 NP+OW+WI+FW+BW

Load Case 4 NP+OW+EQ+FS+BS

Load Case 5 NP+HW+HI

Load Case 6 NP+HW+HE

Load Case 7 IP+OW+WI+FW+BW

Load Case 8 IP+OW+EQ+FS+BS

Load Case 9 EP+OW+WI+FW+BW

Load Case 10 EP+OW+EQ+FS+BS

Load Case 11

PV Elite and CodeCalc

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