PV Elite® 2019
PV Elite 2019 Licensee: SL Client
FileName : CodeCalc1 Page 1 of 3
Leg & Lug Analysis Tailing Lug Item: 1 10:10a Mar 24,2020
Input Echo, Leg & Lug Item 1, Description: Tailing Lug
Design Internal Pressure 10.00 kgf/cm^2
Design Temperature for Attachment TEMP 85.00 C
Vessel Outside Diameter OD 872.000 mm
Vessel Wall Thickness Ts 6.0000 mm
Vessel Corrosion Allowance Cas 0.0000 mm
Vessel Material SA-240 316L
Vessel Material UNS Number S31603
Vessel Allowable Stress at Design S 1174.13 kgf/cm^2
Analysis Type: Lifting Lug
Empty Weight of Vessel Wemp 700.00 kgf
Operating Weight of Vessel (vertical load ) W 0.00 kgf
Lifting Lug Material SA-516 70
Lifting Lug Material UNS Number K02700
Lifting Lug Yield Stress YIELD 2465.69 kgf/cm^2
Lifting Lug Orientation to Vessel Perpendicular
Total Height of Lifting Lug w 170.0000 mm
Thickness of Lifting Lug t 12.0000 mm
Diameter of Hole in Lifting Lug dh 30.0000 mm
Radius of Semi-Circular Arc of Lifting Lug r 35.0000 mm
Height of Lug from bottom to Center of Hole h 100.0000 mm
Offset from Vessel OD to Center of Hole off 106.0000 mm
Minimum thickness of Fillet Weld around Lug tw 5.0000 mm
Length of weld along side of Lifting Lug wl 24.0000 mm
Length of Weld along Bottom of Lifting Lug wb 340.0000 mm
Lift Orientation Horizontal
Force Along Vessel Axis Fax 0.00 kgf
Force Normal to Vessel Fn 725.00 kgf
Force Tangential to Vessel Ft 392.00 kgf
Impact Factor Impfac 1.50
Occasional Load Factor (AISC A5.2) Occfac 1.00
Results for lifting lugs, Description : Tailing Lug
Weld Group Inertia about the Circumferential Axis ILC 73.345 cm**4
Weld Group Centroid distance in the Long. Direction YLL 17.000 mm
Dist. of Weld Group Centroid from Lug bottom YLL_B 12.000 mm
Weld Group Inertia about the Longitudinal Axis ILL 3277.117 cm**4
Weld Group Centroid Distance in the Circ. Direction YLC 11.000 mm
Applying the Impact factor to the loads:
Ft = 392.00 * 1.50 = 588.00 kgf
Fn = 725.00 * 1.50 = 1087.50 kgf
Primary Shear Stress in the Welds due to Shear Loads [Ssll]:
= Sqrt( Fax^2+Ft^2+Fn^2 ) / ( (2*wl+wb) * tw )
= Sqrt(0^2+588^2+1087^2) / ( (2*24.0 +340.0 ) * 5.0000 )
= 63.73 kgf/cm^2
Shear Stress in the Welds due to Bending Loads [Sblf]:
= (Fn*(h-YLL_B)) *YLL/ILC + (Fax*off *YLL/ILC) + (Ft*off *YLC/ILL)
= (1087 *(100.000 -12.000 )) * 17.000 /73.345 +
(0 *106.000 * 17.000 /73.345 ) +
PV Elite® 2019
PV Elite 2019 Licensee: SL Client
FileName : CodeCalc1 Page 2 of 3
Leg & Lug Analysis Tailing Lug Item: 1 10:10a Mar 24,2020
(588 *106.000 * 11.000 /3277.117 )
= 223.91 kgf/cm^2
Total Shear Stress for Combined Loads [St]:
= Ssll + Sblf
= 63.726 + 223.906
= 287.63 kgf/cm^2
Allowable Shear Stress for Combined Loads [Sta]:
= 0.4 * Yield * Occfac (AISC Shear All.)
= 0.4 * 2465 * 1.00
= 986.27 kgf/cm^2
Shear Stress in Lug above Hole [Shs]:
= Sqrt( Fax^2 + Fn^2 + Ft^2 ) / Sha
= Sqrt( 0^2 + 1087^2 + 588^2 ) / 4.800
= 257.56 kgf/cm^2
Allowable Shear Stress in Lug above Hole [Sas]:
= 0.4 * Yield * Occfac
= 0.4 * 2465 * 1.00
= 986.27 kgf/cm^2
Pin Hole Bearing Stress [Pbs]:
= Sqrt( Fax^2 + Fn^2 ) / ( t * dh )
= Sqrt( 0^2 + 1087^2 ) / ( 12.000 * 30.000 )
= 302.08 kgf/cm^2
Allowable Bearing Stress [Pba]:
= Min( 0.75 * Yield * Occfac, 0.9*Yield ) AISC Bearing All.
= Min( 0.75 * 2465 * 1.00 , 2219.1 )
= 1849.26 kgf/cm^2
Bending stress at the base of the lug [Fbs]:
= Ft*off / (w*t^(2) / 6) + Fax*off / (w^(2)*t / 6)
= 588 * 106.000 / (170.000 * 12.000^(2) / 6) +
0 * 106.000 / (170.000^(2) * 12.000 / 6)
= 1527.65 kgf/cm^2
Tensile stress at the base of the lug [Fa]:
= Fn / (w * t) = 1087 / (170.000 * 12.000 )
= 53.31 kgf/cm^2
Total Combined Stress at the base of the lug:
= Fbs + Fa = 1581.0 kgf/cm^2
Lug Allowable Stress for Bending and Tension:
= Min( 0.66 * Yield * Occfac, 0.75*Yield )
= Min( 0.66 * 2465 * 1.00 , 1849.3 ) = 1627.4 kgf/cm^2
Note: Check the Shell Stresses using method such as WRC-107.
Summary of Results
Stress (kgf/cm2
Primary Shear Stress of Weld : 287.63 986.27 Ok |
Shear Stress above Hole : 257.56 986.27 Ok |
Pin Hole Bearing Stress : 302.08 1849.26 Ok |
Total Combined Stress at the lug base : 1580.96 1627.35 Ok |
PV Elite® 2019
PV Elite 2019 Licensee: SL Client
FileName : CodeCalc1 Page 3 of 3
Leg & Lug Analysis Tailing Lug Item: 1 10:10a Mar 24,2020
PV Elite is a trademark of Intergraph CADWorx & Analysis Solutions, Inc. 2019
