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Input Echo, Leg & Lug Item 1, Description: Guide

The document provides analysis results for a guide trunnion attachment on a vessel. Key results include: 1) The trunnion lifting load and stresses are all zero as the operating weight is zero. Calculated stresses are below the allowable limits. 2) A WRC-107 analysis of the trunnion attachment shows stresses in the vessel are below the allowable limits with the exception of a warning about the ratio of pad radius to mean radius. 3) Detailed calculations are provided for trunnion geometry, bending stresses, shear stresses, and bearing contact stresses which all meet criteria.

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Siri Siri
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194 views4 pages

Input Echo, Leg & Lug Item 1, Description: Guide

The document provides analysis results for a guide trunnion attachment on a vessel. Key results include: 1) The trunnion lifting load and stresses are all zero as the operating weight is zero. Calculated stresses are below the allowable limits. 2) A WRC-107 analysis of the trunnion attachment shows stresses in the vessel are below the allowable limits with the exception of a warning about the ratio of pad radius to mean radius. 3) Detailed calculations are provided for trunnion geometry, bending stresses, shear stresses, and bearing contact stresses which all meet criteria.

Uploaded by

Siri Siri
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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PV Elite 23 SP2 Licensee: #Replace this text with your company name and th 1

FileName : Guide -----------------------------------------


Leg & Lug Analysis Guide Item: 1 12:09p Jul 20,2022

Input Echo, Leg & Lug Item 1, Description: Guide

Design Internal Pressure 195.01 psig


Design Temperature for Attachment TEMP 350.57 F
Vessel Outside Diameter OD 14.000 in.
Vessel Wall Thickness Ts 0.6562 in.
Vessel Corrosion Allowance Cas 0.1260 in.
Vessel Material SA-106 B
Vessel Material UNS Number K03006
Vessel Allowable Stress at Design S 17100.00 psi
Analysis Type: Trunnion

Empty Weight of Vessel Wemp 0.00 lb.


Operating Weight of Vessel (vertical load ) W 0.00 lb.

Trunnion Material SA-106 B


Trunnion Material UNS Number K03006
Trunnion Yield Stress SY 30443.71 psi
Trunnion Outside Diameter TOD 4.500 in.
Trunnion Thickness TTHK 0.3370 in.
Trunnion Length TL 5.9055 in.
Bail/Sling Width TT 0.3937 in.
Pad Outside Diameter POD 9.055 in.
Pad Thickness PTHK 0.5906 in.
Ring Outside Diameter Rod 11.81 in.
Ring Thickness Rthk 0.59 in.
Trunnion Type Hollow
Lift Orientation Vertical
Impact Factor Impfac 1.50

Force Along Vessel Axis Fax 0.00 lb.


Force Normal to Vessel Fn 881.83 lb.
Force Tangential to Vessel Ft 0.00 lb.
Perform WRC-107 Analysis on the Trunnion Yes

Occasional Load Factor (AISC A5.2) Occfac 1.00

Results for Trunnions, Description : Guide

Trunnion Lifting Load [Tlf]:


= ((Fa^2 + Ft^2)^1/2)
= ((.00^2 + 0.00^2)^1/2) * 1.50
= 0.00 lb.

Z = pi * (TOD^4 - TID^4) / (32.0 * TOD)


= 3.14 * ( 4.50^4 - 3.83^4) / (32.0 * 4.50 )
= 4.27 in.^3

Trunnion Bending Moment [Tmom]:


= (TL - 0.5 * TT)/12.000* Tlf
= ( 5.91 - 0.5 * 0.39 )/12.000 * 0.00
= 0.00 ft.lb.

Trunnion Calculated Bending Stress [SBC]:


= TMOM * 12.000/ Z
= 0.00 *12.000/ 4.27
= 0.00 psi [Passed] SBC < Min(0.66* SY* Occfac, 0.75* SY) (20092.85)

Trunnion Cross Section Area [Txsa]:


= pi / 4 * (TOD^2- TID^2)
= 3.14 /4 * ( 4.50^2- 3.83^2)
= 4.41 in^2
PV Elite 23 SP2 Licensee: #Replace this text with your company name and th 2
FileName : Guide -----------------------------------------
Leg & Lug Analysis Guide Item: 1 12:09p Jul 20,2022

Trunnion Calculated Shear Stress [SSC]:


= Tlf / Txsa
= 0.00 / 4.41
= 0.00 psi [Passed] SSC < 0.4 * SY * Occfac (12177.48)

Trunnion Unity Check [UCHK]:


= SBC / SBA + SSC / SSA
= 0.00 / 20092.85 + 0.00 / 12177.48
= 0.00 [Passed] UCHK, Must be less than 1.

Trunnion Bearing Contact Area [Tbca]:


= TOD * TT
= 4.50 * 0.39
= 1.77 in^2

Trunnion Bearing Stress [SBEC]:


= Tlf / Tbca
= 0.00 / 1.77
= 0.00 psi [Passed] SBEC < Min(0.75* SY* Occfac, 0.9* SY) (22832.78)

Results of WRC-107 Analysis on the trunnion:

Note: This following Stress Analysis assumes that the Trunnion


passes through the pad and is welded to the shell via a groove weld.
Additionally the re-pad is welded to the shell at the outside
edge via a fillet weld.

Stress Attenuation Diameter (for Insert Plates) per WRC 297:


= NozzleOD + 2 * 1.65 * sqrt( Rmean( t - ca ) )
= 4.500 + 2 * 1.65 * sqrt( 6.735 ( 0.656 - 0.126 ) )
= 10.736 in.

WRC 107 Stress Calculation for OCCasional loads:


Radial Load P -1322.8 lb.
Circumferential Shear VC 0.0 lb.
Longitudinal Shear VL 0.0 lb.
Circumferential Moment MC 0.0 ft.lb.
Longitudinal Moment ML 0.0 ft.lb.
Torsional Moment MT 0.0 ft.lb.

Dimensionless Parameters used : Gamma = 6.27

Dimensionless Loads for Cylindrical Shells at Attachment Junction:


-------------------------------------------------------------------
Curves read for 1979 Beta Figure Value Location
-------------------------------------------------------------------
N(PHI) / ( P/Rm ) 0.280 4C 1.072 (A,B)
N(PHI) / ( P/Rm ) 0.280 3C 0.938 (C,D)
M(PHI) / ( P ) 0.280 2C1 0.075 (A,B)
M(PHI) / ( P ) 0.280 1C 0.101 (C,D)
N(PHI) / ( MC/(Rm**2 * Beta) ) 0.280 3A 0.204 (A,B,C,D)
M(PHI) / ( MC/(Rm * Beta) ) 0.280 1A 0.095 (A,B,C,D)
N(PHI) / ( ML/(Rm**2 * Beta) ) 0.280 3B 0.715 (A,B,C,D)
M(PHI) / ( ML/(Rm * Beta) ) 0.280 1B 0.043 (A,B,C,D)

N(x) / ( P/Rm ) 0.280 3C 0.938 (A,B)


N(x) / ( P/Rm ) 0.280 4C 1.072 (C,D)
M(x) / ( P ) 0.280 1C1 0.103 (A,B)
M(x) / ( P ) 0.280 2C 0.075 (C,D)
N(x) / ( MC/(Rm**2 * Beta) ) 0.280 4A 0.360 (A,B,C,D)
M(x) / ( MC/(Rm * Beta) ) 0.280 2A 0.056 (A,B,C,D)
N(x) / ( ML/(Rm**2 * Beta) ) 0.280 4B 0.204 (A,B,C,D)
M(x) / ( ML/(Rm * Beta) ) 0.280 2B 0.072 (A,B,C,D)
PV Elite 23 SP2 Licensee: #Replace this text with your company name and th 3
FileName : Guide -----------------------------------------
Leg & Lug Analysis Guide Item: 1 12:09p Jul 20,2022

Stress Concentration Factors: Kn = 1.00, Kb = 1.00

Stresses in the Vessel at the Attachment Junction (psi)

| Stress Intensity Values at |


Type of | |
Stress Load | Au Al Bu Bl Cu Cl Du Dl|
------------------------------------------------------------------------------------------------
Circ. Memb. P | 179| 179| 179| 179| 157| 157| 157| 157|
Circ. Bend. P | 476| -476| 476| -476| 637| -637| 637| -637|
Circ. Memb. MC | 0| 0| 0| 0| 0| 0| 0| 0|
Circ. Bend. MC | 0| 0| 0| 0| 0| 0| 0| 0|
Circ. Memb. ML | 0| 0| 0| 0| 0| 0| 0| 0|
Circ. Bend. ML | 0| 0| 0| 0| 0| 0| 0| 0|
| |
Tot. Circ. Str.| 656| -296| 656| -296| 795| -480| 795| -480|
------------------------------------------------------------------------------------------------
Long. Memb. P | 157| 157| 157| 157| 179| 179| 179| 179|
Long. Bend. P | 649| -649| 649| -649| 475| -475| 475| -475|
Long. Memb. MC | 0| 0| 0| 0| 0| 0| 0| 0|
Long. Bend. MC | 0| 0| 0| 0| 0| 0| 0| 0|
Long. Memb. ML | 0| 0| 0| 0| 0| 0| 0| 0|
Long. Bend. ML | 0| 0| 0| 0| 0| 0| 0| 0|
| |
Tot. Long. Str.| 806| -491| 806| -491| 654| -295| 654| -295|
------------------------------------------------------------------------------------------------
Shear VC | 0| 0| 0| 0| 0| 0| 0| 0|
Shear VL | 0| 0| 0| 0| 0| 0| 0| 0|
Shear MT | 0| 0| 0| 0| 0| 0| 0| 0|
| |
Tot. Shear| 0| 0| 0| 0| 0| 0| 0| 0|
------------------------------------------------------------------------------------------------
Str. Int. | 806| 491| 806| 491| 795| 480| 795| 480|

WARNING: Ratio of Pad Radius/Rm (.672) is not between 0.01 and 0.571.

Dimensionless Parameters used : Gamma = 12.70


Dimensionless Loads for Cylindrical Shells at Pad edge:
-------------------------------------------------------------------
Curves read for 1979 Beta Figure Value Location
-------------------------------------------------------------------
N(PHI) / ( P/Rm ) 0.588 4C ! 1.442 (A,B)
N(PHI) / ( P/Rm ) 0.588 3C ! 0.824 (C,D)
M(PHI) / ( P ) 0.588 2C1 ! 0.018 (A,B)
M(PHI) / ( P ) 0.588 1C ! 0.055 (C,D)
N(PHI) / ( MC/(Rm**2 * Beta) ) 0.588 3A ! 0.511 (A,B,C,D)
M(PHI) / ( MC/(Rm * Beta) ) 0.588 1A ! 0.070 (A,B,C,D)
N(PHI) / ( ML/(Rm**2 * Beta) ) 0.588 3B ! 1.047 (A,B,C,D)
M(PHI) / ( ML/(Rm * Beta) ) 0.588 1B ! 0.014 (A,B,C,D)

N(x) / ( P/Rm ) 0.588 3C ! 0.824 (A,B)


N(x) / ( P/Rm ) 0.588 4C ! 1.442 (C,D)
M(x) / ( P ) 0.588 1C1 ! 0.034 (A,B)
M(x) / ( P ) 0.588 2C ! 0.032 (C,D)
N(x) / ( MC/(Rm**2 * Beta) ) 0.588 4A ! 1.353 (A,B,C,D)
M(x) / ( MC/(Rm * Beta) ) 0.588 2A ! 0.034 (A,B,C,D)
N(x) / ( ML/(Rm**2 * Beta) ) 0.588 4B ! 0.522 (A,B,C,D)
M(x) / ( ML/(Rm * Beta) ) 0.588 2B ! 0.027 (A,B,C,D)

Note - The ! mark next to the figure name denotes curve value exceeded.

Stress Concentration Factors: Kn = 1.00, Kb = 1.00


PV Elite 23 SP2 Licensee: #Replace this text with your company name and th 4
FileName : Guide -----------------------------------------
Leg & Lug Analysis Guide Item: 1 12:09p Jul 20,2022

Stresses in the Vessel at the Edge of Reinforcing Pad (psi)

| Stress Intensity Values at |


Type of | |
Stress Load | Au Al Bu Bl Cu Cl Du Dl|
------------------------------------------------------------------------------------------------
Circ. Memb. P | 533| 533| 533| 533| 305| 305| 305| 305|
Circ. Bend. P | 494| -494| 494| -494| 1554| -1554| 1554| -1554|
Circ. Memb. MC | 0| 0| 0| 0| 0| 0| 0| 0|
Circ. Bend. MC | 0| 0| 0| 0| 0| 0| 0| 0|
Circ. Memb. ML | 0| 0| 0| 0| 0| 0| 0| 0|
Circ. Bend. ML | 0| 0| 0| 0| 0| 0| 0| 0|
| |
Tot. Circ. Str.| 1028| 39| 1028| 39| 1859| -1249| 1859| -1249|
------------------------------------------------------------------------------------------------
Long. Memb. P | 305| 305| 305| 305| 533| 533| 533| 533|
Long. Bend. P | 959| -959| 959| -959| 902| -902| 902| -902|
Long. Memb. MC | 0| 0| 0| 0| 0| 0| 0| 0|
Long. Bend. MC | 0| 0| 0| 0| 0| 0| 0| 0|
Long. Memb. ML | 0| 0| 0| 0| 0| 0| 0| 0|
Long. Bend. ML | 0| 0| 0| 0| 0| 0| 0| 0|
| |
Tot. Long. Str.| 1264| -653| 1264| -653| 1436| -368| 1436| -368|
------------------------------------------------------------------------------------------------
Shear VC | 0| 0| 0| 0| 0| 0| 0| 0|
Shear VL | 0| 0| 0| 0| 0| 0| 0| 0|
Shear MT | 0| 0| 0| 0| 0| 0| 0| 0|
| |
Tot. Shear| 0| 0| 0| 0| 0| 0| 0| 0|
------------------------------------------------------------------------------------------------
Str. Int. | 1264| 692| 1264| 692| 1859| 1249| 1859| 1249|

SUMMARY OF RESULTS:

Trunnion unity check value: 0.0000

Actual Allowable Pass/Fail


Bending Stress (psi ) 0.00 20092.85 Pass
Shear Stress (psi ) 0.00 12177.48 Pass
Bearing Stress (psi ) 0.00 22832.78 Pass

Vessel Maximum Stress Intensity Comparison:


At Nozzle Edge: 806.74 Allowable: 1.5 * S: 25650.00 psi [Passed]
At Pad Edge : 1859.87 Allowable: 1.5 * S: 25650.00 psi [Passed]

PV Elite is a trademark of Hexagon AB, 2021, All rights reserved.

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