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Description: AutoPIPE Class 1 (NB) SampleProduct: AutoPIPEVersion number: V8iSubmitted by: MU

Define Model and Class 1Components

Define Loadings:

Operating & Design Pressure &TemperatureStatic Seismic

Response, Time History etc

Run Thermal Transient Analysis(TTA) -> Enter GRD and Delta Ts

back into the Model

Review Load Combinations

Define Stress Summaries forDifferent Service Levels

Review On Screen StressesPrint Stress Reports

Define and Run Static and DynamicAnalyses

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ASME Class 1 (NB-3630) CriteriaThe flowchart below describes the ASME NB design and analysis process. For code yearsafter 1995 the rules for dealing with the ratchet stress check changed and it becamenecessary for all load set pairs to be considered not just failed ones. The difference isindicated by different colored routes blue for Pre 1995 and green for Post 1995. Only LevelA service limits are shown.

Fail

Fail

Model geometry, confirm allpiping components and pipe

conform to permissible ASME NBstandards.

Determine material propertiesand allowable stresses

NB-3653.6 Evaluate theCumulative Usage factor

Fatigue

Satisfactory system

Modify design, reducepessimism in assumptionsor add failed componentsto maintenance schedule

Usage < 1

NB-3652 Satisfy the PrimaryStress Intensity Equation 9 1

Pre 1995

Passed load set pairs

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Define Class 1 Reducers

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Define Class 1 Tees & Branches

Insert / Modify Tee shows following dialog

Class 1 Tee Types Welding Fabricated-longl. as weld Fabricated-longl. flush weld Branch Other [User Defined]

4 different Branch configuration types:

A) Uniform, < 45 deg B) Uniform, = 90 deg C) Sloped D) Unreinforced

where :

A Uniformly thickened, straight transition (refer to Fig. NB-3643.3(a)-1(a))

B Uniformly thickened, rounded transition (refer to Fig. NB-3643.3(a)-1(b))

C Linearly varying reinforcement (refer to Fig. NC-3643.3(a)-1(c))

D No branch reinforcement (refer to Fig. NC-3643.3(a)-1(d))

Tee Type

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Define Class 1 Joint Types

Insert > Xtra Data > Joint Type & User SIFOnly 1 joint type at each point

Joint Type Plot NameAs-Welded Butt Weld BW

Flush Butt Weld FBWAs-Welded Butt Weld NB-4250 Transition BWT

Flush Butt Weld NB-4250 Transition FBWTAs-Welded Butt Weld 1:3 Transition BWT1:3

Flush Butt Weld 1:3 Transition FBWT1:3Socket/Fillet Weld SW

User-Defined User

Show Joint Types on the Plot

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Define Design Pressure and Temperature

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Enter GRD backinto the model

Enter GRD backinto the model

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Enter Delta Ts back into Operating

Temperature & Pressure Dialog

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Define Thermal Gross Discontinuity Stress

Calculated from the Thermal Transient Analysis

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Gross Discontinuity Stress and Delta T1, T2values are seen in the Pre-Verification and

Fatigue stress reports

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Perform a Static Analysis

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Setup Post Processing Combinations

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Analyzedloadcases

Choose whichCombinations

to Print

Convert automatic to aUser combination

Click forAutomatic

Combinations1

Define 40 characterDescription

Color coding Results are outdated with the model revision and

the appropriate analysis needs to be re-run. (LoadCases Grid only) Code Combination is used in the Stress Summary

for ASME NB, NC or ND piping codes only User combination is used in another User

combination and therefore cannot be deleted Invalid code or non-code combinations since results

are missing for one or more components containedin the combination

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View Class 1 Stress Results

Class 1 Pre-Verification Stresses

What are Pre-Verification Stresses?

To Evaluate Basic Operating Load stresseswithout a full Class 1, 2 or 3 Code compliance

Solve Deadweight Supporting problems

Solve Thermal Flexibility problems

Evaluate Seismic Loadings

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COLOR PLOT

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Full Class 1 Stresses

Stresses automatically sorted On-Screen

Result Grid

Color Plot

Sorted ResultsFilter by CombinationFilter by Service LevelFind Max Stress Quickly

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Stress Reports

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Detailed Full Verification Stress ReportEasy to observed points of failure

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Level C or D Reversing Dynamic for 1994or later codes

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Final Fatigue Usage factor calculated= actual / allowable Cycles

Iterations

Load Set Pair Calculations

Detailed Fatigue Report