Prepared by: Baher EL Shaikh
Page ( 6 / 41 )
ASME Code VIII VIII Div. I Edition 2004, Addenda 2005
Nozzle (N1)
Pressure Vessel Calculation
(8")
Sheet (1/2)
Head Data SA-516 Gr 70 M 138000
:- Shell material. 20,000
:- (Sv), Max. allowable stress -(Kpa, (psi)) :- (E1) , efficiency of shell at nozzle.
1.00 mm 14
in 0.551
:- (tv), wall thick, uncorroded
2.362
0.093
:- (tr), required wall thickness
914.5 4.000
36.0
:- (Rsi), inside radius of shell
0.157
:- (c), corrosion allowance
Nozzle Data: SA-106 Gr. B M 1.00 1.00 12.5%
:- Nozzle material. :- (E) Nozzle Efficiency. :- (F) Correction factor. :- (Utp), undertolerance of nozzle pipe.
88.9 Kpa
3.500 psig
:- (Do) , Outside diameter - (mm, (in))
118000.00 358.73
17,100 51.0
:- (Sn), Max. allowable stress : (P), (P=Pi+Ps) Internal Pressure
Nozzle Required Wall Thickness (trn) UG-27 (C)& Appendex 1-1
trn = P*(Do/2)/(Sn*E+0.4*P)
=51*(3.5/2)/(17100*1+0.4*51)=
0.005
in
0.13
mm
By addi adding ng corr corros osio ion n all. all. (AC) (AC)= = trn+ trn+2* 2*c c
=0.0 =0.005 05+( +(2* 2*0. 0.15 157) 7) =
0.16 0.163 3
in
4.13
mm
By adding pipe tolerance = AC+UTP*trn
=0.163+0.125*0.005 =
0.163 in 0.719 in
4.15 mm 18.26 mm
UT = tc =
0.090 0.472
in in
2.28
d=
2.557
in
Ron =
1.75 1.28
in in
Use Nozzle 8" Sch120 B36.10M (tn) Variables: Under tolerance(UT) = Nozzle corroded thickness (tc)
=
tn*UTp = 0.719 * 0.125 tn-c-UT = 0.719-0.157-0.09
Nozzle Inside corroded Diameter (d) =
Do-2*tc = 3.5 - 2*0.472
Nozzle corroded inside raduis (Ron) =
Do/2
= 2.557/2
Nozzle uncorroded inside raduis (Rn) =
d/2
= 2.56/2
Rn =
Vessle corroded thk.(t) =
tv-c
= 0.551 - 0.157
t= ti=
Nominal thk. of internal projection of nozzle wall (ti) =tn-2c
=0.719-(2*0.157) =
0.394 0.404
h=
11.98 mm 64.94 mm 44.45 mm
32.47 mm in 10.00 mm in 10.26 mm
Extension of nozzle beyond the inside surface of the vessel wall (h) = min. of {(2.5*tv),(2.5*ti) h = Min.{(2.5*0.551),(2.5*0.404)=
mm
fr1 = MI MIN(Sn/Sv,1)
= MIN(17100/20000, 1)
fr1 =
1.010 in 0.855
fr2 = MI MIN(Sn/Sv,1)
= MIN(17100/20000, 1)
fr2 =
0.855
fr3 = MIN(Sn/Sv,Sp/Sv,1)
= MIN(17100/20000, 0/20000,1)
fr3 =
0.000
fr4 = MIN(Sp/Sv,1)
= MIN(0/20000,1)
fr4 =
0.000
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ASME Code VIII Div. I Edition 2004, Addenda 2005
Page ( 7 / 41 )
Pressure Vessel Calculation
Nozzle (N1) (8")
Sheet (2/2)
Nozzle Neck Thickness (UG-45): Wall thickness per UG-45(a) tr1=trn+c
=0.005+0.157 =
0.163
in
4.13
mm
Wall thickness per UG-45(b) tr2=tr+c Wall thickness per UG-16(b) tr3=0.0625+c Wall thickness per UG-45(b)(4) tr4=(t std -Utp)+c
=0.093+0.157 =
0.250
in
mm
=0.0625+0.157 =
0.220
in
6.36 5.59
=0.189+0.157 =
0.346
in
8.80
The greater greater of tr2 or tr3 tr5 = The lesser of tr4 or tr5 tr6 = Required per UG-45 largest of tr1 or tr6 tr7=
=Max(0.25,0.22) =
0.250
in
=Min(0.346,0.25) =
0.250
in
6.36 6.36
=Max(0.163,0.25) =
0.250
in
6.36
mm mm
=0.25 ≤0.719-0.09
Ok
0.750
in
19.05
mm
0.551
in
14.00
mm
0.250
in
6.35
mm
0.386
in
mm
0.250
in
9.80 6.35
0.354
in
mm
0.472
in
8.98 12.00
0.000 0.000 0.000
in in in
0.00 0.00 0.00
mm
tr7≤ tn-Utp*tn
mm mm mm
Calulating Size of Fillet Weld (Leg41,Leg42) used UW-16&Fig. UW-16: tmin1= from UW-16(b) Between Nozzle and Shell tmin= Min(tv,tn,tmin1) =MIN(0.551,0.719,0.75) a u a on o c tc1 =0.7*0.551 = tc2= 0.7*tmin =Mim.(0.25,0.386) tc= Min.(tc1,tc2) By considering equal fillet weld 1/2
Le of outw outward ard nozzle nozzle weld weld = 2 *tc use Leg41 = Leg43
=2^1/2*0.25
Between Reinforcing and Shell tmin= Min(tv,te,tmin1) =MIN(0.551,0,0.75) 1/2 =2^1/2*0/2 Le of outward nozzle weld = 2 *tmin/2 Use Leg42 =
mm
mm
mm mm
MDMT for the nozzle :1- For W.N. flange B16.5
MDMT W/O impact test {UCS-66(C)}
-20
O
F
-29
O
C
2- For nozzle pipe SA-106 Gr. B, curve B Min temp. at nominal thk. W/O impact test (UCS-66) Nominal thk. of nozzle (tn) Required thk. of nozzle wall (trn) Ratno = trn * E / ( tn - c ) O
Reduction in MDMT = (1 - ratio)*100 F (Fig. UCS-66.1)
MDMT at required thk. W/O impact test (UCS-66.1) MDMT for the nozzle (assembly)
O 13 F 0.719 in 0.005 in 0.01 < O -99.07 F O -86.07 F
-20
O
F
O
C -11 18.2 8.263 mm 0.13 mm 0.35 O -72.74 C O -65.53 C -29
O
C
