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TMIN CALCS
CALCULATE CORR RATE & TMIN DATE
CALCULATE TMIN DATE
(or THICKNESS at a TMIN DATE)
Calculated by:
Perry D. Koch
2 Thickness Meas's when Corr Rate is Unknown
ENTERED DATA
DATE
Meas
Earliest
02/01/95
0.460
Latest
07/22/99
0.200
CALCULATED DATA
Tmin
0.100
ENTERED DATA
DATE
Meas
Meas
Meas
Meas
Meas
Meas
Meas
Meas
Earliest
02/01/87
0.460
0.450
Latest
03/01/94
0.240
0.210
Date Revised: 09/09/2015 00:30:28
Calculated by:
Perry D. Koch
One Thickness Meas. & a Known Corr Rate
Corr
Rate
58.1
Yrs to
Tmin
1.7
TMIN
DATE
04/09/01
CALCULATED DATA
Tmin
0.100
Corr
Rate
31.1
33.9
0.0
0.0
0.0
0.0
0.0
0.0
Yrs to
TMIN
Tmin
DATE
4.5
09/01/98
6.2
05/09/00
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ENTERED DATA
Date of
Meas
06/18/97
Last
Meas
0.380
Tmin
0.120
Corr
Rate
30.9
CALC'D DATA
Yrs to
Tmin
8.4
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PDK
TMIN CALCS
CALCULATE PRESSURE VESSEL TMIN or DESIGN PRESSURE
PRESSURE VESSEL TMIN CALCS (Cylindrical shells INSIDE RADIUS) - enter DATA IN BOXES FOR CALC'N
t= PR/SE-0.6P
Minimum Required Thickness, inches
P= SEt/R+0.6t Design Pressure, psi
P=
10
Design Pressure, psi
t=
3.120
minimum required thickness
R=
457.2
INSIDE Radius of shell, inches
R=
29.0
INSIDE Radius of shell, inches
S=
1055
Maximum Allowable Stress, psi
S=
17500
Maximum Allowable Stress, psi
E=
1.00
Joint Efficiency
E=
1.00
Joint Efficiency
t=
4.360
inches,
per ASME Sect 8 UG-27(c)1
P=
1883
psi,
per ASME Sect 8 UG-27(c)1
PRESSURE VESSEL TMIN CALCS (Cylindrical shells OUTSIDE RADIUS) - enter DATA IN BOXES FOR CALC'N
t= PR/SE+0.4P
Minimum Required Thickness, inches
P= SEt/R-0.4t Design Pressure, psi
P=
40
Design Pressure, psi
t=
0.128
minimum required thickness
R=
175.6
OUTSIDE Radius of shell, inches
R=
12.0
OUTSIDE Radius of shell, inches
S=
20000
Maximum Allowable Stress, psi
S=
16600
Maximum Allowable Stress, psi
E=
1.00
Joint Efficiency
E=
0.85
Joint Efficiency
t=
0.351
FORMED ELLIPSODIAL
t= PD/2SE-0.2P
P=
10
D=
914.400
S=
1230.372
*E=
1.00
t=
3.719
inches,
ASME Sect 8 UG-27 APP 1-1
P=
150
psi
ASME Sect 8 UG-27 APP 1-1
HEADS, PRESSURE ON CONCAVE SIDE (INSIDE RADIUS) - enter DATA IN BOXES FOR CALC'N
Minimum Required Thickness, inches
P= 2SEt/D+0.2t Design Pressure, psi
Design Pressure, psi
t=
3.115
minimum required thickness
INSIDE Diametr head skirt, inches
D=
60.0
INSIDE Diametr head skirt, inches
Maximum Allowable Stress, psi
S=
16600
Maximum Allowable Stress, psi
Joint Efficiency (see table below for eff)
*E=
0.85
Joint Efficiency (see table below for eff)
inches,
per ASME Sect 8 UG-32(d)
Date Revised: 09/09/2015 00:30:29
P=
Page 4 of 12
1450
psi,
per ASME Sect 8 UG-32(d)
PDK
TMIN CALCS
FORMED ELLIPSODIAL
t= PD/2SE+1.8P
P=
3300
D=
18.0
S=
17600
*E=
0.85
t=
1.656
HEADS, PRESSURE ON CONVCAVE SIDE (OUTSIDE RADIUS) - enter DATA IN BOXES FOR CALC'N
Minimum Required Thickness, inches
P= 2SEt/D-1.8t Design Pressure, psi
Design Pressure, psi
t=
1.656
minimum required thickness
OUTSIDE Diametr head skirt, inches
D=
30.0
OUTSIDE Diametr head skirt, inches
Maximum Allowable Stress, psi
S=
17600
Maximum Allowable Stress, psi
Joint Efficiency (see table below for eff)
*E=
0.85
Joint Efficiency (see table below for eff)
inches,
P=
per ASME Sect 8 UG-32(d)
* EFFICIENCY (E) TO BE USED IN CALCULATIONS OF
SEAMLESS HEADS
TYPE OF
TYPE OF DEGREE OF EXAMINATION
HEAD
JOINT
OF HEAD TO SHELL JOINT
FULL
SPOT
NONE
Hemi-shpr
#1
1.00
0.85
0.80
Hemi-shpr
#2
0.90
0.80
0.80
All others
ANY
1.00
0.85
0.80
Excerpted from PRESSURE VESSEL HANDBOOK
Date Revised: 09/09/2015 00:30:29
Page 5 of 12
1834
psi,
per ASME Sect 8 UG-32(d)
STRESS VALUES of MATERIALS
1000 psi
SPEC
TEMP
NO.
GRADE
-20 to 650
SA-285
C
13.8
SA-515
60
15.0
SA-515
70
17.5
SA-516
60
15.0
SA-516
70
17.5
PDK
TMIN CALCS
CALCULATE PIPING TMIN
Chemical Plant & Petroleum Refinery Piping, ANSI B31.3
Straight Pipe Under Internal Pressure, 304.1.2 - enter DATA IN BOXES FOR CALC'N
t= PD/2(SE+PY) Pressure Design Thickness, inches
P=
150
Internal Design Gage Pressure
D=
6.625
Outside Diameter of Pipe, inches
SE=
15000
Allowable Stress, excluding quality or joint factors (E=1 if seamless pipe)
Y=
0.40
Coefficient from Table 304.1.1, Y=0.4 for all Ferritic Steels up to 900 F
t=
0.033
inches,
per ANSI B31.3, Para. 304.1.2
CALCULATE PIPING MAXIMUM PRESSURE
Chemical Plant & Petroleum Refinery Piping, ANSI B31.3
Straight Pipe Under Internal Pressure, 304.1.2 - enter DATA IN BOXES FOR CALC'N
P= 2SEt/(D-2tY) Internal Design Pressure, psig
t=
0.155
Pressure Design Thickness, inches
Thickness is UT 0.20 - 0.02 corrosion allowance
D=
1.05
Outside Diameter of Pipe, inches
SE=
18800
Allowable Stress, excluding quality or joint factors (E=1 if seamless pipe)
Y=
0.40
Coefficient from Table 304.1.1, Y=0.4 for all Ferritic Steels up to 900 F
P=
6294
psig,
a Kg/cm2=
442.49
per ANSI B31.3, Para. 304.1.2
CALCULATE PIPING MAXIMUM PRESSURE
Gas Transmission and Distribution Piping Systems, ANSI B31.8
Date Revised: 09/09/2015 00:30:29
Page 6 of 12
PDK
TMIN CALCS
P= (2St/D)xFxEx Internal Design Pressure, psig
S=
35000
Specified minimum yield strength
D=
16.00
Nominal outside diameter, inches
t=
0.18
Nominal wall thickness, inches
F=
0.60
Construction type design factor from Table 841.111, Construction Type B factor = 0.60, TYPE C = 0.50
E=
1.00
Lonlgitudinal joint factor from Table 841.112, 1.00 for seamless pipe
T=
1.00
Temperature derating factor from Table 841.113, for 250F or less T=1.00
P=
473
psig
CALCULATE PIPELINE INTERNAL DESIGN PRESSURE
49 CFR, Part 195, para 195.106
Straight Pipe Under Internal Pressure, 304.1.2 - enter DATA IN BOXES FOR CALC'N
P= (2St/D)xExF Internal design pressure in psig
S=
13800
YIELD strength in psi
t=
2.580
Nominal wall thickness of the pipe in inches
D=
16.0
Nominal outside diameter of the pipe in inches
E=
1.00
Seam joint factor, E=1 for all seamless pipe
F=
0.72
Design factor, F= 0.72, except for off-shore platforms
P=
3204.4
psig
Date Revised: 09/09/2015 00:30:29
Page 7 of 12
PDK
TMIN CALCS
orr Rate
CALC'D DATA
TMIN
DATE
11/14/05
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Date Revised: 09/09/2015 00:30:29
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PDK
TMIN CALCS
Date Revised: 09/09/2015 00:30:29
Page 9 of 12
PDK
TMIN CALCS
Date Revised: 09/09/2015 00:30:29
Page 10 of 12
PDK
TMIN CALCS
Date Revised: 09/09/2015 00:30:29
Page 11 of 12
PDK
TMIN CALCS
Date Revised: 09/09/2015 00:30:29
Page 12 of 12
PDK
