1. REV. 1 DATE 30/07/2015
REV. 0 DATE 1/6/2015
UDR No.
NEM LD UD 03
DRAWING NO.
NEM LD 03 01 (Rev.0)
BY CHK'D BY APPRV'D BY
LPG DRUM
JOB ORDER
As per ASME Boiler and Pressure Vessels Code
Section VIII Division 1 Ed. 2013
DESIGN CALCULATION SHEET
FOR
NEM - LD - 03
2. page 2 of 17
ASME Code VIII Div. I Edition 2013
Page Contents
1 Cover
2 Table of contents
3 Summary
4 Loadings
5 Shell thickness calculations
5 Shell stress relief calculations
6 MDMT for shell calculations
6 PWHT calculations
6 Hydrostatic test calculations
7 End head calculations
8 N1, N2, N3 & N4 calculations
10 MDMT for nozzles calculations
11 N5 & N6 calculations
13 Seismic load calculations
14 Wind load calculations
16 Saddle calculations
REV. 0
Pressure Vessel Calculation
3. page 3 of 17
ASME Code VIII Div. I Edition 2013
Pressure Vessel Summary
LPG Drum
Project LPG Drum
Location EGYPT - Alex.
Jop NO. NEM - LD - 03
Design Conditions
Service `
Hydrostatic test press. 0.65 MPa
Internal Desgin press. (MAWP) 0.5 Mpa
External Design Pressure
Design Temp. 70 ºc
Vessel External Diameter 273 mm
MDMT -10 ºc
Material Impact Tested
PWHT
Certification Mark
Code / Edition
Joint Efficiency
`
Material SA-106 GR.B (Shell)
SA-105 (Flanges)
SA- 234 WPB (Caps)
SA-193/B7 - SA-194/2H (Stud Bolts - Nuts)
SA- 105 (Coupling & plugs)
THK. 9.27 mm (Shell & Heads)
Corrosion Allowance 3 mm
Overall length
Empty Weight
Year Built
Lethal Service UW-2
REV. 1
ASME VIII-1 Edition 2013
Pressure Vessel Calculation
LPG
NR
NA
NR
NR
YES "U"
Seamless pipe = 1
Category B = 1
Category C = 1
2015
1754 mm
148 Kg
4. page 8 of 17
ASME Code VIII Div. I Edition 2013
Nozzle calculations : N1, N2, N3 & N4 (150# )
Shell Data
SA-106 Gr. B :- Shell material.
118.00 :- (Sv), Max. allowable stress - (MPa)
:- (E1), efficiency of shell at nozzle.
mm
9.27 :- (tv), wall thick, uncorroded
3.556 :- (tr), required wall thickness
127.23 :- (Rsi), inside radius of shell
3 :- (c), corrosion allowance
Nozzle Data:
SA-106 Gr. B :- Nozzle material.
:- (E) Joint Efficiency.
: (sp.gr.) Fluid specific gravity.
:- (Utp), undertolerance of nozzle pipe.
73 :- (Do), Outside diameter - (mm)
Mpa
118 : (Sn), Max. allowable stress
0.50 : (Pi), Internal design Pressure at top vessel
0.003 : (Ps) static pressure (at bottom of vessel)
0.503 : (P), (P=Pi+Ps) Internal Pressure
Reinforcing Data: Reinforcement is not required as per UG-36 (c)(3)
NR :- Reinforcing plate material.
0 :- (Sp), Max.allowable stress - (Kpa)
0 :- (te), reinforcement thick - (mm)
:- (F) Correction factor.
Nozzle Required Wall Thickness (trn) UG-27 (C)& Appendex 1-1
trn = P*(Do/2)/(Sn*E+0.4*P) 2.19 mm
By adding corrosion all. (AC)= trn+c 5.19 mm
By adding pipe tolerance = AC+UTP*trn 5.46 mm
Use Nozzle DN 65 (2.5") Sch 80 B36.10M (tn) 7.01 mm
Variables:
Under tolerance(UT) = tn*Utp= 7.01*12.5% UT = 0.88 mm
Nozzle corroded thickness (tc) = tn-c-UT= 7.01-3-0.88 tc = 3.13 mm
Nozzle Inside corroded Diameter (d) = Do-2*tc 73-2*3.13 d = 66.76 mm
Nozzle outside raduis (Ron) = Do/2 73/2 Ron = 36.50 mm
Nozzle corroded inside raduis (Rn) = d/2 66.76/2 Rn = 33.38 mm
Vessle corroded thk.(t) = tv-c 9.27-3 t = 6.27 mm
fr1 = MIN(Sn/Sv,1) fr1 = 1.000
fr2 = MIN(Sn/Sv,1) fr2 = 1.000
fr3 = MIN(Sn/Sv,Sp/Sv,1) fr3 = 0.000
fr4 = MIN(Sp/Sv,1) fr4 = 0.000
REV. 1
Pressure Vessel Calculation
1.00
1.000
12.5%
1.00
1.00
5. page 10 of 17
ASME Code VIII Div. I Edition 2013
Nozzle angle used in area Calculation 90 o
A = d*tr*F+2*tc*tr*F*(1-fr1) (Area Required) A 237.4 mm2
A11= d * ( E1 * t + F * tr ) - 2 * tnc * ( E1 * t ) *( 1 - fr1 ) A11 237.4 mm2
A12= 2*(t+tc)*(E1*t-F*tr)-2*tc(e1*t-F*tr)*(1-fr1) A12 51.04 mm2
A1= The greater of A11 , A12 A1 237.4 mm2
A21= 5*(tc-trn)*fr2*t A21 68.43 mm2
A22= 2*(tc-trn)*(2.5*tc+te)*fr2 A22 34.2 mm2
A2= (Area available in nozzle)=The Lesser of A21 ,A22 A2 34.20 mm2
A5= (Dp-d-2*tc)*te*fr4 =(5.256-2.628-2*0.123)*0*0 = A5 0.0 mm2
A41 = (Leg41)2
*fr3 A41 0.00 mm2
A42 = (Leg42)2
*fr4 A42 0.00 mm2
Actual Area = A1+A2+A5+A41+A42 272 mm2
Actual Area > Area Required Ok
MDMT for the nozzle :-
For W.N. flange B16.5 2" (DN 65) 150#
MDMT W/O impact test {UCS-66(C)} -29
O
C
For nozzle pipe SA-106 Gr. B, curve B
Min temp. at nominal thk. W/O impact test (UCS-66) -29
O
C
Nominal thk. of nozzle (tn) 7.01 mm
Required thk. of nozzle wall (trn) 2.191 mm
Ratno = trn * E / ( tn - c ) 0.24 < 0.35
Reduction in MDMT = (1 - ratio)*56 O
C (Fig. UCS-66.1) -42.56 O
C
MDMT for the nozzle (assembly) -29
O
C
Check on distance between the nozzles centerline
As per UG-36 (c )(3)(-c)
No two isolated unreinforced openings shall have their centers closer to each other than the sum of their diameters
since the distance between the nozzles openning is 450 mm, it is higher than the sum of nozzles diameters.
so the distance between the nozzles in safe.
REV. 1
Pressure Vessel Calculation
6. page 11 of 17
ASME Code VIII Div. I Edition 2013
Nozzle calculations : N5 & N6 (3000#)
Shell Data
SA-106 Gr. B :- Shell material.
118.00 :- (Sv), Max. allowable stress - (MPa)
:- (E1), efficiency of shell at nozzle.
mm
9.27 :- (tv), wall thick, uncorroded
3.556 :- (tr), required wall thickness
127.23 :- (Rsi), inside radius of shell
3 :- (c), corrosion allowance
Nozzle Data:
SA-105 :- Nozzle material.
:- (E) Nozzle Efficiency.
: (sp.gr.) Fluid specific gravity.
:- (Utp), undertolerance of nozzle pipe.
76 :- (Do), Outside diameter - (mm)
Mpa
138 : (Sn), Max. allowable stress
0.50 : (Pi), Internal design Pressure at top vessel
0.003 : (Ps) static pressure (at bottom of vessel)
0.503 : (P), (P=Pi+Ps) Internal Pressure
Reinforcing Data:
Reinforcement calculations is exempted as per UG 36(c)(3)(b)
Weld strength calculations is exempted as per UW 15 (b)
N / A :- Reinforcing plate material.
0 :- (Sp), Max.allowable stress - (Kpa)
0 :- (te), reinforcement thick - (mm)
:- (F) Correction factor.
Nozzle Required Wall Thickness (trn) UG-27 (C)& Appendex 1-1
trn = P*(Do/2)/(Sn*E+0.4*P) 0.82 mm
By adding corrosion all. (AC)= trn+c 3.82 mm
By adding pipe tolerance = AC+UTP*trn 3.92 mm
Threads depth as per UG 31 c)(2) = 20/n(the number of threads per inch) = 20/11.5 = 1.74 mm
5.66 mm
Use Nozzle 2" (D N 50) Sch 160 B16.11 Table 7, class 3000 threaded 8.74 mm
Minimum Nozzle Thinkness Requirement (UG-45):
UG-45 (ta) = trn+CA+Threads
0.82 + 3 + 1.74 5.56 mm
5.56 < Nozzle Thickness 8.74 X 0.875 = 7.64 Acceptable
Shell Nominal Thickness (9.27 mm) > Nozzle Nominal Thickness (8.74 mm)
Calulating Size of Fillet Weld used UW-16&Fig. UW-16:
Throat Weld = 0.7 x 8.74 6.11 mm
REV. 1
Pressure Vessel Calculation
1.00
1.000
12.5%
1.00
1.00
7. ASME Code VIII Div. I Edition 2013
Seismic load calculations at test conditions( UBC - 1997 ) :
Dimensions:
: (H) - Height of Vessel (mm)
: (B) - Distance from centerline to base plate
: (Ls) - Distance between two saddles
: (b) - Longitudinal width of saddle
: (E) - Transverse width of saddle
: (W) - Hydrostatic weight -(kg)
Seismic factor:
0.035 : (Ct) Numerical factor
1 : (I) Occupancy factor
2.75 : (RW) - Numerical Coefficient
1 : (S) - Site Coefficient for Soil characteristics
0.15 : (Z) - Seismic Zone Factor - Zone - 2A
Fundamental Period of Vibration (T) = Ct XH^3/4
=0.035*684^3/4= 4.681 Sec. 3020.14
Numerical Coefficient (C) = 1.25 S / T^2/3
=1.25*1/4.681^2/3= 0.447
Total Seismic shear at base(V) = ZIC*W / RW
=0.15*1*0.447*300/2.75 7.309 kgf 4715.7
Longitudinal Force FsL = V 7.309 kgf
Transvese Force Fst = 0.5V 3.655 kgf
Reaction force per saddle:
longitudinal reaction (QL) = (W/2) + (FsL*B/Ls)
=(300/2)+(7.309*400/900)= 153.249 kgf 69.51249
Transverse reaction (Qt) = W/2 +3* Fst*B/E
=(300/2)+(3*3.655*400/346) = 162.675 kgf 73.78836
Reaction force per saddle = max of (QL,Qt) 162.675 kgf
73.78836
mm
90
REV. 1
page 12 of 17
Pressure Vessel Calculation
900
684
400
346
300
Max. 2.75
8. REV. 1
page 17 of 17
ASME Code VIII Div. I Edition 2013
Xo= (Do/2)*sin=5.375*sin120/2.62 = 45 mm
d= Y-Xo =35.43-2 = 855 mm
Bending moment (M=85.8*33.66 = 234 Kg.mm
Bending stress = M=2695.84*9.49/3140.95 = 0.573 Kpa
Sa = 0.66* SY =0.66*38000= 1763 Kpa
(< 0.66 Sy) Accepted
Pressure Vessel Calculation
12. Technical Delivery Specification
SA 105
REV. 1
DOC. NO. TDS-LD-01
PAGE 04/10
DATE 30/07/2015
Job: NEM-LD-03 DWG No.: NEM-LD-03-01
Item
Quantity
Size pressure class
Tolerance
Product standard
Flange face finish
Material specification
Test reports required
Marking required
Optional requirements
Supplementary requirements
: 4 (Flanges)
: As per Material Requisition Report attached.
: As per Material Requisition Report attached.
: As per ASME B 16.5, 2009.
: ASME B 16.5, 2009.
: As per ASME B 16.5, 2009.
: SA 105, meeting ASME Sec. II Part-A, Edition 2013.
: Material test report, as per SA 961 of ASME Sec. II Part-A Edition 2013,
Para. 19.
: As per ASME B 16.5, 2009.
: None.
: None
PREPARED APPROVED REVIWED
Name Hossam Sobhy Mohamed Samieh Mohamed Abdallah
Signature
Title TOE TOM QCM
Date 01/06/2015 01/06/2015 01/06/2015
14. Technical Delivery Specification
SA 193
REV. 1
DOC. NO. TDS-LD-01
PAGE 09/10
DATE 30/07/2015
Job: NEM-LD-03 DWG No.: NEM-LD-03-01
Item
Quantity
Size
Material specification
Heat treatment
Finish
Thread
Test report required
Marking required
Optional requirements
Supplementary requirements
: 10 (Alloy steel studs)
: As per Material Requisition Report attached.
: As per Material Requisition Report attached.
: SA 193 Gr. B7, meeting ASME Sec. II Part-A Edition 2013.
: As per material specification.
: Zinc plated.
: UNC 8 UN.
: Not required
: As per SA 193 of ASME Sec. II Part-A Edition 2013, Para. 19.
: None.
: None
PREPARED APPROVED REVIWED
Name Hossam Sobhy Mohamed Samieh Mohamed Abdallah
Signature
Title TOE TOM QCM
Date 01/06/2015 01/06/2015 01/06/2015