Available nozzle wall thickness new, tn = 0.875*0.688 = 0.602 in

The nozzle neck thickness is adequate.

External Pressure, (Corroded & at 450 F) UG-28(c)

L / Do = 16.9932 / 12.75 = 1.3328Do / t = 12.75 / 0.0506 = 252.0895From table G: A = 0.000246From tableCS-2: B = 3,317.7143 psi

Pa = 4*B / (3*(Do / t))= 4*3,317.71 / (3*(12.75 / 0.0506))= 17.55 psi

Design thickness for external pressure Pa = 17.55 psi

ta = t + Corrosion = 0.0506 + 0.125 = 0.1756"

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VENT (V)

ASME Section VIII Division 1, 2013 Edition

Note: round inside edges per UG-76(c)Location and Orientation

Located on Top Head

Orientation 0

End of nozzle to datum line 212"

Calculated as hillside Yes

Distance to head center, R 20"

Passes through a Category A joint NoNozzle

Description NPS 6 (Thk = 0.375")Access opening No

Material specification SA-106 B Smls pipe (II-D p. 14, ln. 19)Inside diameter, new 5.875"

Nominal wall thickness 0.375"

Corrosion allowance 0.125"

Opening chord length 7.9106"

Projection available outside vessel, Lpr 5.4138"Projection available outside vessel to flange face, Lf 8.9138"Local vessel minimum thickness 0.4375"

Liquid static head included 0 psi

Longitudinal joint efficiency 1Reinforcing Pad

Material specification SA-516 70 (II-D p. 22, ln. 6)

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Diameter, Dp 11.4603"

Thickness, te 0.4375"

Is split No

Welds

Inner Fillet, Leg41 0.5"

Outer Fillet, Leg42 0.325"

Nozzle to vessel groove weld 0.375"

Pad groove weld 0.375"

ASME B16.5-2009 Flange

Description NPS 6 Class 150 WN A105

Bolt Material SA-193 B7 Bolt

UCS-66 Material Toughness Requirements Pad

Governing thickness, tg = 0.4375"

Exemption temperature from Fig UCS-66 Curve B = -13F

tr = 150*48.25*0.993145 / (2*20,000*1 - 0.2*150) = 0.1798"Stress ratio = tr*E* / (tn - c) = 0.1798*1 / (0.4375 - 0.125) = 0.5755Reduction in MDMT, TR from Fig UCS-66.1 = 45.1F

MDMT = max[ MDMT - TR, -55] = max[ -13 - 45.1 , -55] = -55FMaterial is exempt from impact testing at the Design MDMT of -20F.

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Reinforcement Calculations for MAWP

The thickness requirements of UG-45 govern the MAWP of this nozzle.

UG-37 Area Calculation Summary (in2) UG-45Summary (in)For P = 169.43 psi @ 450 F

The opening is adequately reinforcedThe nozzle passes

UG-45

Arequired

Aavailable A1 A2 A3 A5

Awelds treq tmin

1.6217 2.7614 0.8572 0.2932 -- 1.3125 0.2985 0.3281 0.3281

UG-41 Weld Failure Path Analysis Summary (lbf)All failure paths are stronger than the applicable weld loads

Weld loadW

Weld loadW1-1

Path 1-1strength

Weld loadW2-2

Path 2-2strength

Weld loadW3-3

Path 3-3strength

16,224.77 38,084 87,302.1 12,393.88 139,858.5 40,755.88 95,839.87

UW-16 Weld Sizing Summary

Weld description Required weldsize (in)

Actual weldsize (in) Status

Nozzle to pad fillet (Leg41) 0.175 0.35 weld size is adequate

Pad to shell fillet (Leg42) 0.1562 0.2275 weld size is adequate

Nozzle to pad groove (Upper) 0.175 0.375 weld size is adequate

Nozzle to shell groove (Lower) 0.175 0.25 weld size is adequate

Calculations for internal pressure 169.43 psi @ 450 F

Parallel Limit of reinforcement per UG-40

LR = MAX(d, Rn + (tn - Cn) + (t - C))= MAX(7.9106, 3.9553 + (0.375 - 0.125) + (0.4375 - 0.125))= 7.9106 in

Outer Normal Limit of reinforcement per UG-40

LH = MIN(2.5*(t - C), 2.5*(tn - Cn) + te)= MIN(2.5*(0.4375 - 0.125), 2.5*(0.375 - 0.125) + 0.4375)= 0.7813 in

Nozzle required thickness per UG-27(c)(1)

trn = P*Rn / (Sn*E - 0.6*P)= 169.4262*3.0625 / (17,100*1 - 0.6*169.4262)= 0.0305 in

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