1
Pipe wall thickness calculation according ASME B31.3 [1]
Data
Pipe (CS) material (Note 0)
Weld joint type
(Note1)
dn =
Nominal diameter
Design pressure
P=
Design temperature
temp =
Corrosion allowance
TC =
Thread (Yes/No)
Thread =
1.-Pipe exterior diameter
de =
Pipe_Imp_CS_Dext_dn
dn =
2
in
de =
#VALUE! mm
A 53 Gr. B
2.-Material allowable stress
ASME B31.1,Table A-1 (sheet 3)
s allow =
130.3
MPa
S
2
1.03
260
1.59
Yes
in
MPa
ºC
mm
Select welding type from data validation list
S
Seamless pipe
ERW Elecric Resisitance Welded pipe
EFW Electric FusionWelded pipe
FBW Furnace Butt Welded pipe
Note 2
Nominal diameter from drop down list
Note 3
Basic alowable stresses in tension for metals
Material allowable stress interpolated for the
temperature "t", from sheet: 3.- B31.3_Table A-1
Note 4
Quality factor "E" is determined from Table A-1B,
(Sheet 3)
(Note 4)
Basic thickness
P⋅d e
t basic =
Eq . (3 a)
2⋅[ σ⋅E+P⋅Y ]
Y: coefficient from Table 304.1.1
Note 1
(Note 3)
Material:
A 53 Gr. B
and a longitudinal weld
type:
S
ASME B31.3, Tabla A-1B gives
E=
1
(3a of ASME B31.3 paragraph 304.1.2
P: design internal pressure
de: pipe exterior diameter
s: material allowable stress
E: Quality factor
Select material from data validation list
Data is taken from sheet: 3.- B31.3_Table A-1
The selected material must be able to produce
valid answers in the points:
3.-Material allowable stress
4.- Quality factor "E" for the given longitudinal weld type
5.- "Y" coefficient for equation (3a)
3.- Quality factor "E" for the given longitudinal weld type
1.-Basic thickness (Internal pressure design thickness)
The basic thickness " tbasic " is calculated according equation
tbasic: design thickness by pressure
Note 0
(Sheet 4)
5.- "y" coefficient for equation (3a)
Tabla 304.1.1 should be used for t < d/6
d=
#VALUE! mm
d/6 =
#VALUE! mm
#VALUE!
ASME 304.1.1-304.2.1, Table 304.1.1. gives for:
(Note 5)
material type:
Ferritic_steel
[mm]
[Mpa gauge]
and Temperature:
260
[mm]
[MPa]
[-]
"y coefficient"
y=
[-]
6.- Basic thickness acc. B31.3 (3a)
tbasic = P * de / ( 2* (st,max * E + P* Y) )
0.4
(Sheet 5)
P=
de =
1.03
MPa
#VALUE!
mm
st,max =
E=
y=
130.3
1
0.4
MPa
-
tbasic =
from sheet 4.- Tabla A-1B, for the selected
material and weld joint type.
ºC
Note 5
"y" coeficient of Eq. 3a is determined by interpolation
from Table 304.1.1, for the selected material and
temperature (sheet 5. y coefficient).
Available VBA function: y_ferritic_t
Note 6
Use any consistent set uf units
t basic =
P⋅d e
2⋅[ σ⋅E+P⋅Y ]
Eq . (3 a)
#VALUE! mm
2
7. Thread depth
Thread =
For
dn =
NT =
TD =
(Note 7)
Other check
Yes
2
11.5
1.91
in
threads/inch
mm
a.- Nominal thickness
tnom =
#VALUE!
b.- Worst case of nominal thickness
tnom:WC =
tnom * 0.875
8.- Allowances (Over Thickness)
tallowances = TC + TD
TC =
TD =
1.59
1.91
mm
mm
tallowances =
3.50
mm
tnom =
#VALUE!
mm
tnom.WC =
#VALUE!
mm
threads per inch is obtained from Table 2 and the
thread heigh from Table 1 of sheet 6.
Note 8 Table 2, ASME B1.20.1-1983, gives the number of
threads per inch
Note 9 For a number of threads per inch NT, Table 1,
c.- Basic thickness
tbasic =
9.- Schedule selected
Sch =
80
Note 7 When thread is to be considered, the number of
mm
(Note 8)
(Nota 9)
#VALUE!
ASME B1.20.1-198 gives a thread depth TD
mm
(Note 10)
d.- Basic and Allowances thickness
tbasicAll =
tbasic + tAllowances
Note 10 Select a shedule, that with the used nominal
diameter, will satisfy the requirements.
tbasic =
#VALUE!
mm
tallowances =
3.50
mm
tbasicAll =
#VALUE!
mm
10.- Nominal thickness
tnom =
dn =
Sch =
tnom =
Pipe_Imp_CS_Thickness_dn_sch
2
80
in
#VALUE!
mm
e.- Requisite
11.- Rated thickness
trated =
tnom * 0.875 - tAllowances
tNom =
#VALUE!
mm
tallowances =
trated =
3.50
mm
#VALUE!
mm
tnom.WC >=
tBasicAll
tnom.WC =
#VALUE!
mm
tbasicAll =
#VALUE!
mm
#VALUE!
Dt =
#VALUE!
mm
12.- Requisite
trated >=
tBasic
trated =
#VALUE!
mm
tBasic =
#VALUE!
#VALUE!
mm
Dt =
#VALUE!
mm
3
Material allowable stress (Note 3)
t=
260
°C
(For t < 38 °C, the table uses 38 °C)
Row =
14
(Selected material)
If there is thread, Tables 2 and Tab 3 deliver the depth of thread (Not
Table 1 and 2, from sheet 6
From sheet 3
Col_A =
Col_B =
7
tA =
8
tB =
260.0
316
Matrix Table_2
Matrix Table_1
°C
sA =
130.3
MPa
Table_2
Table_ 1
°C
sB =
119.3
MPa
NPS
1/16
1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
Threads/in
8
10
12
14
16
18
20
24
8
8
8
8
8
8
8
8
sB + (sA - sB) * (tb - t)/(tb - ta)
130.3
MPa
S=
S=
Factor "E" from sheet 4.- Tabla A-1B, Table A-1B (Note 4)
Material
Welding type
E-factor
A 53
S
1
Coeficiente "Y" for the temperature "t" (Note 5)
t=
482
Col_A =
1
tA =
482
°C
YA =
0.4
Col_B =
2
tB =
510
°C
YB =
0.5
3
1
482
1
0.4
0
0.4
0.4
3
2
510
2
0.4
N/A
0.5
0.4
4
4
593
4
0.5
N/A
0.7
0.4
6
5
621
5
0.7
N/A
0.7
0.4
7
Cell storing
°C
mat. number
1
2
3
4
Austenitic_steel
Cast_iron
Ferritic_steel
Other_ductile_metals
1
Y=
Y=
2
(For t < 482 °C, the table uses 482 °C)
(For t > 621 °C, the table uses 621 °C)
YA + (t - tA) / (tb - tA) * (YB - YA)
0.4
Use of VBA function
y=
y_ferritic_t(t)
3
566
3
0.4
N/A
0.7
0.4
5
27
27
18
18
14
14
11 1/2
11 1/2
11 1/2
11 1/2
8
8
8
8
8
8
Threads/in H (mm)
27
0.81
18
14
11.5
8
1.22
1.57
1.91
2.75
When thread is to be considered, the
number of threads per inch is obtained
from Table 2 and the thread heigh from
Table 1 of sheet 6.
t=
y=
482
#VALUE!
ºC
-
4
Validation list for CS pipes
dn
in
1/2
3/4
1
1 1/2
2
3
4
5
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
Sch
5
10
20
30
40
60
80
100
120
140
160
STD
XS
XXS
Validation list for thread selection
Yes
No
Pag. 1 of 2
Cálculo de espesor de cañería, de acuerdo a ASME B31.3
Datos
A 53 Gr. B
Material (acero carbono) de la cañería
Tipo de soldadura longitudinal (Nota 1)
dn =
Diámetro nominal
Presión de diseño
2
in
2.- Diámetro exterior de la cañería
dn =
2
in
de =
3.-Esfuerzo admisible para el material
(Nota3)
ASME B31.1,Table A-1
s allow =
138
(Hoja 3)
2
Mpa
4
80
°C
5
Tolerancia de corrosión
TC =
1.59
mm
Hilo (Si/No)
Hilo =
Sí
El espesor de diseño por presión "t" se calcula de acuerdo a
la ecuación (3a) de ASME B31.3 párrafo 304.1.2
tdis:
2⋅[ σ⋅E + P⋅Y ]
4.- Factor de calidad "E" para la soldadura longitudinal del caso
(Nota 4)
Material:
A 53 Gr. B
tipo:
#REF!
y una soldadura longitudinal
La norma ASME B31.3, Tabla A-1B entrega
E=
(Hoja 1)
(3 a)
6
MPa
7
1.-Espesor de diseño por presión
t dis =
(Nota2)
3
P=
P⋅d ext
mm
2
temp =
Temperatura de diseño
#VALUE!
1
#N/A
(Hoja4)
5.- Coeficiente "Y" para la ecuación (3a)
Tabla 304.1.1 debe ser usada para t < d/6
d=
#VALUE! mm
espesor de diseño por presión
[mm]
P: Presión interna de diseño, manométr
de: diámetro exterior de la cañería
[MPa]
ASME 304.1.1-304.2.1, Tabla 304.1.1. entrega para: (Nota 4)
[mm]
[MPa]
[-]
[-]
Tipo de material:
Temperatura:
el siguiente "coeficiente Y"
Y=
0.4
s: Esfuerzo permitido para el material
E: factor de calidad
Y: coeficiente de Tabla 304.1.1
d/6 =
#VALUE!
mm
#VALUE!
Ferritic_steel
80
8
ºC
(Hoja5)
En columnas P a W, se pueden ver los pasos del cálculo
y las notas.
Para ver estas columnas, si están ocultas, hacer click
en el signo "+", en la parte superior de la hoja.
Las nueve (9) celdas en amarillo son los inputs requeridos.
El último input corresponde a la "cédula" que debe ser seleccionada
para que el espesor de la cañería sea superior al espesor mínimo
requerido calculado en el punto #10.
Lista de validación para selección de hilo
Para chequeo, ver Hoja 14. Example
Ver Hoja 7. Recommended minimum thickness
#2.- El diámetro exterior de la cañería se obtiene con la función
Para ver hojas escondidas:
- Click con botón derecho sobre cualquiera de la lengüetas de la hojas
- Click em "Mostrar" (o Unhide)
#3.-
Sí
No
#1.
ASME B31.3 - 2002 - 1
Ferritic steel
Austenitic steel
Cast iron
Sheet 5
Coefficient Y
ASME 304.1.1-304.2.1
Table 304.1.1.
For t < d/6
t <=
Y=
ASME B31.3 # 303. Pressure design of componentes
ASME B31.3, #304.1.1, Eq. (2)
Equation (3a) of ASME B31.3 paragraph 304.1.2
t:
P:
dext:
s =
E:
Y:
pipe wll thickness (measure or minimum per
purchase specification
internal design pressure gauge
[Pa]
Exterior pipe diameter [mm]
Stress value for materialfrom Table A-1
[Pa]
quality factor from Table A-1A or A-1B
coefficient from Table 304.1.1 , valid fo t < dext / 6
Y=
t=
P⋅d ext
d int +2⋅c
t ≥ dext / 6
d ext + d int +2⋅c
( 3 a)
2⋅[ σ⋅E+ P⋅Y ]
⟩ or
¿ t < ( d ext / 6 ) ¿
P⋅( d int +2⋅c )
⟩t=
( 3 b)
2⋅[ σ⋅E− P⋅( 1−Y ) ]
¿
t=
( 3 a)
2⋅[ σ⋅E+ P⋅Y ]
⟩ or
¿ t < ( d ext / 6 ) ¿
P⋅( d int +2⋅c )
⟩t=
( 3 b)
2⋅[ σ⋅E− P⋅( 1−Y ) ]
¿
Austenitic steel
Coefficient Y
ASME 304.1.1-304.2.1
Table 304.1.1.
482
0.4
ºC
e design of componentes
ASME code for pressure piping, B31
ASME B31.3-2002
Chapter 1. Scope and Definitions
FSC :
D
Material = ASTM A 53
Type :
F
1
2
3
API 5L
ASTM A 53, Type F
ASTM A 134 not made from ASTM 285 plate
Table A-1. Basic alowable stresses in tension for metals (Page 157 - 161) from ASME B31.3-2002
14
1
Spec & Grade
1
Allowable stress as function of temperature [MPa]
2
Material
2
3
38
3
4
93
4
5
149
5
6
204
6
7
260
7
8
316
8
9
343
9
TEMPERATURE °C
10
11
371
399
10
11
12
427
12
13
454
13
14
482
14
15
510
15
16
538
16
17
566
17
18
593
18
1
A 106 Gr. A
110.3
110.3
110.3
110.3
110.3
102.0
100.0
99.3
73.8
64.1
54.5
44.8
31.0
17.2
11.0
6.9
2
A 106 Gr. B
137.9
137.9
137.9
137.9
130.3
119.3
117.2
113.8
89.6
74.5
60.0
44.8
31.0
17.2
N/A
N/A
3
A 106 Gr. C
160.6
160.6
160.6
157.9
148.9
135.8
133.8
132.4
102.0
82.7
N/A
N/A
N/A
N/A
N/A
N/A
4
A 134 Gr.
A 285 Gr. A
103.4
100.7
97.9
94.5
89.6
81.4
80.0
79.3
71.0
62.1
53.8
45.5
N/A
N/A
N/A
N/A
5
A 134 Gr.
A 285 Gr. B
115.1
113.1
110.3
106.2
100.7
91.7
90.3
89.6
77.2
66.2
55.8
44.8
N/A
N/A
N/A
N/A
6
A 134 Gr.
285 Gr. B
126.2
126.2
122.0
118.6
111.7
102.0
100.0
99.3
82.7
70.3
57.2
44.8
N/A
N/A
N/A
N/A
7
A 135 Gr. A
110.3
110.3
110.3
110.3
110.3
102.0
100.0
99.3
73.8
64.1
54.5
44.8
31.0
17.2
11.0
6.9
8
A 333 Gr. 6
137.9
137.9
137.9
137.9
130.3
119.3
117.2
113.8
89.6
74.5
60.0
44.8
31.0
17.2
N/A
N/A
N/A
9
A 334 Gr. 6
137.9
137.9
137.9
137.9
130.3
119.3
117.2
113.8
89.6
74.5
60.0
44.8
31.0
17.2
N/A
10
A 369 Gr. FPA
110.3
110.3
110.3
110.3
110.3
102.0
100.0
99.3
73.8
64.1
54.5
44.8
31.0
17.2
11.0
6.9
11
A 369 Gr. FPB
137.9
137.9
137.9
137.9
130.3
119.3
117.2
113.8
89.6
74.5
60.0
44.8
31.0
17.2
N/A
N/A
12
A 53 Gr. Gr. A
110.3
110.3
110.3
110.3
110.3
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
13
A 53 Gr. A
110.3
110.3
110.3
110.3
110.3
102.0
100.0
99.3
73.8
64.1
54.5
44.8
31.0
17.2
11.0
6.9
14
A 53 Gr. B
137.9
137.9
137.9
137.9
130.3
119.3
117.2
113.8
89.6
74.5
60.0
44.8
31.0
17.2
N/A
N/A
15
AP5L Gr. A
110.3
110.3
110.3
110.3
110.3
102.0
100.0
99.3
73.8
64.1
54.5
44.8
31.0
17.2
11.0
6.9
16
API5L Gr. A25
Butt weld
103.4
2861.3
1065.2
95.1
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
17
API5L Gr. A25
Smls
103.4
2861.3
1065.2
95.1
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
18
API5L Gr. B
137.9
137.9
137.9
137.9
130.3
119.3
117.2
113.8
89.6
74.5
60.0
44.8
31.0
17.2
N/A
N/A
19
API5L Gr. X42
137.9
137.9
137.9
137.9
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
20
API5L Gr. X46
144.8
144.8
144.8
144.8
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
21
API5L Gr. X52
151.7
151.7
151.7
151.7
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
22
API5L Gr. X56
1
163.4
3
163.4
4
163.4
5
163.4
6
N/A
7
N/A
8
N/A
9
N/A
10
N/A
11
N/A
12
N/A
13
N/A
14
N/A
15
N/A
16
N/A
17
N/A
18
Type F
2
Allowable stress
14
Table A-1. Basic alowable stresses in tension for metals (Page 157 - 161) from ASME B31.3-2002
ASME B31.3-2002
Table A-1. Basic alowable stresses in tension for metals (Page 157 - 161)
Allowable stress as function of temperature [MPa]
Material
Type F
Butt weld
Smls
A 285 Gr. A
A 285 Gr. A
285 Gr. B
A 285 Gr. B
A 285 Gr. B
A 516 Gr. 60
A 515 Gr. 60
A 515 Gr. 61
A 516 Gr. 62
A 516 Gr. 65
A 515 Gr. 65
A 515 Gr. 65
A 516 Gr. 65
A 516 GR. 70
A 515 GR. 70
A 515 GR. 70
A 516 GR. 70
Spec
A 53
A 53
A 53
A 106
A106
A106
A 135
A 333
A 334
A 369
A 369
A 381
API 5L
API 5L
API 5L
API 5L
API 5L
API 5L
API 5L
API 5L
A 134
A 672
A 134
A 672
A 134
A 671
A 671
A 672
A 672
A 671
A 671
A 672
A 672
A 671
A 671
A 672
A 672
Grade
Gr. A
A
B
A
B
C
A
6
6
FPA
FPB
Y35
A
A25
A25
B
X42
X46
X52
X56
…
A45
A 50
CC60
C860
B60
C60
CC65
C865
B65
C65
CC70
CB70
B70
C70
38
110.3
110.3
137.9
110.3
137.9
160.6
110.3
137.9
137.9
110.3
137.9
137.9
110.3
103.4
103.4
137.9
137.9
144.8
151.7
163.4
103.4
103.4
115.1
115.1
126.2
137.9
137.9
137.9
137.9
149.6
149.6
149.6
149.6
159.3
159.3
159.3
159.3
93
110.3
110.3
137.9
110.3
137.9
160.6
110.3
137.9
137.9
110.3
137.9
137.9
110.3
2861.3
2861.3
137.9
137.9
144.8
151.7
163.4
100.7
100.7
113.1
113.1
126.2
134.4
134.4
134.4
134.4
146.9
146.9
146.9
146.9
155.1
155.1
155.1
155.1
149
110.3
110.3
137.9
110.3
137.9
160.6
110.3
137.9
137.9
110.3
137.9
137.9
110.3
1065.2
1065.2
137.9
137.9
144.8
151.7
163.4
97.9
97.9
110.3
110.3
122.0
136.5
136.5
136.5
136.5
142.7
142.7
142.7
142.7
149.6
149.6
149.6
149.6
204
110.3
110.3
137.9
110.3
137.9
157.9
110.3
137.9
137.9
110.3
137.9
137.9
110.3
95.1
95.1
137.9
137.9
144.8
151.7
163.4
94.5
94.5
106.2
106.2
118.6
126.2
126.2
126.2
126.2
137.9
137.9
137.9
137.9
141.3
141.3
141.3
141.3
TEMPERATURE °C
371
399
427
454
482
510
538
566
593
100.0
117.2
100.0
117.2
133.8
100.0
117.2
117.2
100.0
117.2
117.2
100.0
99.3
113.8
99.3
113.8
132.4
99.3
113.8
113.8
99.3
113.8
113.8
99.3
73.8
89.6
73.8
89.6
102.0
73.8
89.6
89.6
73.8
89.6
89.6
73.8
64.1
74.5
64.1
74.5
82.7
64.1
74.5
74.5
64.1
74.5
74.5
64.1
54.5
60.0
54.5
60.0
44.8
44.8
44.8
44.8
31.0
31.0
31.0
31.0
17.2
17.2
17.2
17.2
11.0
6.9
11.0
6.9
54.5
60.0
60.0
54.5
60.0
60.0
54.5
44.8
44.8
44.8
44.8
44.8
44.8
44.8
31.0
31.0
31.0
31.0
31.0
31.0
31.0
17.2
17.2
17.2
17.2
17.2
17.2
17.2
11.0
6.9
11.0
6.9
11.0
6.9
119.3
117.2
113.8
89.6
74.5
60.0
44.8
31.0
17.2
81.4
81.4
91.7
91.7
102.0
108.9
108.9
108.9
108.9
119.3
119.3
119.3
119.3
126.9
126.9
126.9
126.9
80.0
80.0
90.3
90.3
100.0
106.9
106.9
106.9
106.9
117.2
117.2
117.2
117.2
126.2
126.2
126.2
126.2
79.3
79.3
89.6
89.6
99.3
106.2
106.2
106.2
106.2
115.8
115.8
115.8
115.8
102.0
102.0
102.0
102.0
71.0
71.0
77.2
77.2
82.7
89.6
89.6
89.6
89.6
95.8
95.8
95.8
95.8
82.7
82.7
82.7
82.7
62.1
62.1
66.2
66.2
70.3
74.5
74.5
74.5
74.5
78.6
78.6
78.6
78.6
64.1
64.1
64.1
64.1
53.8
53.8
55.8
55.8
57.2
60.0
60.0
60.0
60.0
62.1
62.1
62.1
62.1
44.8
44.8
44.8
44.8
45.5
44.8
44.8
44.8
44.8
44.8
44.8
44.8
44.8
44.8
44.8
44.8
44.8
31.0
31.0
31.0
31.0
31.0
17.2
0.0
17.2
11.0
0.0
11.0
6.9
11.0
11.0
11.0
6.9
6.9
6.9
11.0
11.0
11.0
6.9
6.9
6.9
260
110.3
110.3
130.3
110.3
130.3
148.9
110.3
130.3
130.3
110.3
130.3
130.3
110.3
316
343
102.0
119.3
102.0
119.3
135.8
102.0
119.3
119.3
102.0
119.3
119.3
102.0
130.3
89.6
89.6
100.7
100.7
111.7
119.3
119.3
119.3
119.3
130.3
130.3
130.3
130.3
335.8
335.8
335.8
335.8
31.0
31.0
31.0
31.0
31.0
31.0
31.0
31.0
31.0
17.2
17.2
17.2
17.2
17.2
17.2
17.2
17.2
17.2
17.2
17.2
17.2
11.0
11.0
11.0
6.9
6.9
6.9
6.9
ASME B31.3-2002
Table A-1. Basic alowable stresses in tension for metals (Page 157 - 161)
Allowable stress as function of temperature [ksi]
1 ksi =
Material
Type F
Butt weld
Smls
A 285 Gr. A
A 285 Gr. A
A 285 Gr. B
A 285 Gr. B
285 Gr. B
A 516 Gr. 60
A 515 Gr. 60
A 515 Gr. 61
A 516 Gr. 62
A 516 Gr. 65
A 515 Gr. 65
A 515 Gr. 65
A 516 Gr. 65
A 516 GR. 70
A 515 GR. 70
A 515 GR. 70
A 516 GR. 70
6.89476
Spec
A 53
A 53
A 53
A 106
A106
A106
A 135
A 333
A 334
A 369
A 369
A 381
API 5L
API 5L
API 5L
API 5L
API 5L
API 5L
API 5L
API 5L
A 134
A 672
A 134
A 672
A 134
A 671
A 671
A 672
A 672
A 671
A 671
A 672
A 672
A 671
A 671
A 672
A 672
Mpa
Grade
Gr. A
A
B
A
B
C
A
6
6
FPA
FPB
Y35
A
A25
A25
B
X42
X46
X52
X56
…
A45
A 50
CC60
C860
B60
C60
CC65
C865
B65
C65
CC70
CB70
B70
C70
38
93
149
100
16
16
20
16
20
23.3
16
20
20
16
20
20
16
15
15
20
20
21
22
23.7
15
15
16.7
16.7
18.3
20
20
20
20
21.7
21.7
21.7
21.7
23.1
23.1
23.1
23.1
200
16
16
20
16
20
23.3
16
20
20
16
20
20
16
415
415
20
20
21
22
23.7
14.6
14.6
16.4
16.4
18.3
19.5
19.5
19.5
19.5
21.3
21.3
21.3
21.3
22.5
22.5
22.5
22.5
16
16
20
16
20
23.3
16
20
20
16
20
20
16
154.5
154.5
20
20
21
22
23.7
14.2
14.2
16
16
17.7
19.8
19.8
19.8
19.8
20.7
20.7
20.7
20.7
21.7
21.7
21.7
21.7
300
204
260
316
343
400
16
16
20
16
20
22.9
16
20
20
16
20
20
16
13.8
13.8
20
20
21
22
23.7
13.7
13.7
15.4
15.4
17.2
18.3
18.3
18.3
18.3
20
20
20
20
20.5
20.5
20.5
20.5
500
16
16
18.9
16
18.9
21.6
16
18.9
18.9
16
18.9
18.9
16
c
18.9
v
600
14.8
17.3
14.8
17.3
19.7
14.8
17.3
17.3
14.8
17.3
17.3
14.8
650
TEMPERATURE °C
371
399
Temperature °F
700
750
14.5
17
14.5
17
19.4
14.5
17
17
14.5
17
17
14.5
14.4
16.5
14.4
16.5
19.2
14.4
16.5
16.5
14.4
16.5
16.5
14.4
10.7
13
10.7
13
14.8
10.7
13
13
10.7
13
13
10.7
17.3
17
16.5
13
13
14.6
14.6
16.2
17.3
17.3
17.3
17.3
18.9
18.9
18.9
18.9
48.7
48.7
48.7
48.7
11.8
11.8
13.3
13.3
14.8
15.8
15.8
15.8
15.8
17.3
17.3
17.3
17.3
18.4
18.4
18.4
18.4
11.6
11.6
13.1
13.1
14.5
15.5
15.5
15.5
15.5
17
17
17
17
18.3
18.3
18.3
18.3
11.5
11.5
13
13
14.4
15.4
15.4
15.4
15.4
16.8
16.8
16.8
16.8
14.8
14.8
14.8
14.8
427
454
482
510
538
566
593
800
850
900
950
1000
1050
1100
9.3
10.8
9.3
10.8
12
9.3
10.8
10.8
9.3
10.8
10.8
9.3
7.9
8.7
7.9
8.7
7.9
8.7
8.7
7.9
8.7
8.7
7.9
6.5
6.5
6.5
6.5
4.5
4.5
4.5
4.5
2.5
2.5
2.5
2.5
1.6
1.6
-
1
6.5
6.5
6.5
6.5
6.5
6.5
6.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1.6
1.6
1.6
1
13
10.8
8.7
6.5
4.5
2.5
-
10.3
10.3
11.2
11.2
12
13
13
13
13
13.9
13.9
13.9
13.9
12
12
12
12
9
9
9.6
9.6
10.2
10.8
10.8
10.8
10.8
11.4
11.4
11.4
11.4
9.3
9.3
9.3
9.3
7.8
7.8
8.1
8.1
8.3
8.7
8.7
8.7
8.7
9
9
9
9
6.5
6.5
6.5
6.5
6.6
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
2.5
2.5
2.5
2.5
2.5
1.6
1
2.5
1.6
1
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1
1
1
1
1
1
1
1
1
1
1
1
ASME B31.3-2002
Table A-1. Basic alowable stresses in tension for metals (Page 157 - 1
38
Material
A 285 Gr. A
A 285 Gr. A
Spec
A 134
A 672
Grade
…
A45
to
100
15
15
Butt weld
smls
API 5L
API 5L
A25
A25
15
15
A 53
Gr. A
16
A 53
A 106
A 135
A 369
API 5L
A
A
A
FPA
A
16
16
16
16
16
A 285 Gr. B
A 285 Gr. B
285 Gr. B
A 134
A 672
A 134
A 50
16.7
16.7
18.3
A 516 Gr. 60
A 515 Gr. 60
A 515 Gr. 61
A 516 Gr. 62
A 671
A 671
A 672
A 672
CC60
C860
B60
C60
20
20
20
20
A 53
A106
A 333
A 334
A 369
A 381
API 5L
B
B
6
6
FPB
Y35
B
20
20
20
20
20
20
20
Type F
100
API 5L
API 5L
API 5L
API 5L
X42
X46
X52
X56
20
21
22
23.7
A 516 Gr. 65
A 515 Gr. 65
A 515 Gr. 65
A 516 Gr. 65
A 671
A 671
A 672
A 672
CC65
C865
B65
C65
A 516 GR. 70
A 515 GR. 70
A 515 GR. 70
A 516 GR. 70
A 671
A 671
A 672
A 672
CC70
CB70
B70
C70
23.1
23.1
23.1
23.1
A106
C
23.3
100
21.7
21.7
21.7
21.7
100
API 5L
API 5L
API 5L
API 5L
X60
X65
X70
X80
25
25.7
27.3
30
Allowable stress as function of temperature [MPa]
16
1
Spec & Grade
1
A 106 Gr. A
A 106 Gr. B
A 106 Gr. C
A 134 Gr.
A 134 Gr.
A 134 Gr.
A 135 Gr. A
A 333 Gr. 6
A 334 Gr. 6
A 369 Gr. FPA
A 369 Gr. FPB
A 381 Gr. Y35
A 53 Gr. Gr. A
A 53 Gr. A
A 53 Gr. B
A 671 Gr. CC60
A 671 Gr. C860
A 671 Gr. CC65
A 671 Gr. C865
2
Material
2
A 285 Gr. A
A 285 Gr. B
A 285 Gr. B
Type F
A 516 Gr. 60
A 515 Gr. 60
A 516 Gr. 65
A 515 Gr. 65
3
38
3
110.3
137.9
160.6
103.4
115.1
126.2
110.3
137.9
137.9
110.3
137.9
137.9
110.3
110.3
137.9
137.9
137.9
149.6
149.6
4
93
4
110.3
137.9
160.6
100.7
113.1
126.2
110.3
137.9
137.9
110.3
137.9
137.9
110.3
110.3
137.9
134.4
134.4
146.9
146.9
5
149
5
110.3
137.9
160.6
97.9
110.3
122.0
110.3
137.9
137.9
110.3
137.9
137.9
110.3
110.3
137.9
136.5
136.5
142.7
142.7
6
204
6
110.3
137.9
157.9
94.5
106.2
118.6
110.3
137.9
137.9
110.3
137.9
137.9
110.3
110.3
137.9
126.2
126.2
137.9
137.9
7
260
7
110.3
130.3
148.9
89.6
100.7
111.7
110.3
130.3
130.3
110.3
130.3
130.3
110.3
110.3
130.3
119.3
119.3
130.3
130.3
8
316
8
102.0
119.3
135.8
81.4
91.7
102.0
102.0
119.3
119.3
102.0
119.3
119.3
N/A
102.0
119.3
108.9
108.9
119.3
119.3
9
343
9
100.0
117.2
133.8
80.0
90.3
100.0
100.0
117.2
117.2
100.0
117.2
117.2
N/A
100.0
117.2
106.9
106.9
117.2
117.2
TEMPERATURE °C
10
11
371
399
10
11
99.3
73.8
113.8
89.6
132.4
102.0
79.3
71.0
89.6
77.2
99.3
82.7
99.3
73.8
113.8
89.6
113.8
89.6
99.3
73.8
113.8
89.6
113.8
89.6
N/A
N/A
99.3
73.8
113.8
89.6
106.2
89.6
106.2
89.6
115.8
95.8
115.8
95.8
12
427
12
64.1
74.5
82.7
62.1
66.2
70.3
64.1
74.5
74.5
64.1
74.5
74.5
N/A
64.1
74.5
74.5
74.5
78.6
78.6
13
454
13
54.5
60.0
N/A
53.8
55.8
57.2
54.5
60.0
60.0
54.5
60.0
60.0
N/A
54.5
60.0
60.0
60.0
62.1
62.1
14
482
14
44.8
44.8
N/A
45.5
44.8
44.8
44.8
44.8
44.8
44.8
44.8
44.8
N/A
44.8
44.8
44.8
44.8
44.8
44.8
15
510
15
31.0
31.0
N/A
N/A
N/A
N/A
31.0
31.0
31.0
31.0
31.0
31.0
N/A
31.0
31.0
31.0
31.0
31.0
31.0
16
538
16
17.2
17.2
N/A
N/A
N/A
N/A
17.2
17.2
17.2
17.2
17.2
17.2
N/A
17.2
17.2
17.2
17.2
17.2
17.2
17
566
17
11.0
N/A
N/A
N/A
N/A
N/A
11.0
N/A
N/A
11.0
N/A
N/A
N/A
11.0
N/A
N/A
11.0
N/A
11.0
18
593
18
6.9
N/A
N/A
N/A
N/A
N/A
6.9
N/A
N/A
6.9
N/A
N/A
N/A
6.9
N/A
N/A
6.9
N/A
6.9
A 671 Gr. CC70
A 671 Gr. CB70
A 672 Gr. A45
A 672 Gr. A 50
A 672 Gr. B60
A 672 Gr. C60
A 672 Gr. B65
A 672 Gr. C65
A 672 Gr. B70
A 672 Gr. C70
AP5L Gr. A
API5L Gr. A25
API5L Gr. A25
API5L Gr. B
API5L Gr. X42
API5L Gr. X46
API5L Gr. X52
API5L Gr. X56
1
A 516 GR. 70
A 515 GR. 70
A 285 Gr. A
A 285 Gr. B
A 515 Gr. 61
A 516 Gr. 62
A 515 Gr. 65
A 516 Gr. 65
A 515 GR. 70
A 516 GR. 70
Butt weld
Smls
2
159.3
159.3
103.4
115.1
137.9
137.9
149.6
149.6
159.3
159.3
110.3
103.4
103.4
137.9
137.9
144.8
151.7
163.4
3
155.1
155.1
100.7
113.1
134.4
134.4
146.9
146.9
155.1
155.1
110.3
2861.3
2861.3
137.9
137.9
144.8
151.7
163.4
4
149.6
149.6
97.9
110.3
136.5
136.5
142.7
142.7
149.6
149.6
110.3
1065.2
1065.2
137.9
137.9
144.8
151.7
163.4
5
141.3
141.3
94.5
106.2
126.2
126.2
137.9
137.9
141.3
141.3
110.3
95.1
95.1
137.9
137.9
144.8
151.7
163.4
6
135.8
135.8
89.6
100.7
119.3
119.3
130.3
130.3
135.8
135.8
110.3
N/A
N/A
130.3
N/A
N/A
N/A
N/A
7
126.9
126.9
81.4
91.7
108.9
108.9
119.3
119.3
126.9
126.9
102.0
N/A
N/A
119.3
N/A
N/A
N/A
N/A
8
126.2
126.2
80.0
90.3
106.9
106.9
117.2
117.2
126.2
126.2
100.0
N/A
N/A
117.2
N/A
N/A
N/A
N/A
9
102.0
102.0
79.3
89.6
106.2
106.2
115.8
115.8
102.0
102.0
99.3
N/A
N/A
113.8
N/A
N/A
N/A
N/A
10
82.7
82.7
71.0
77.2
89.6
89.6
95.8
95.8
82.7
82.7
73.8
N/A
N/A
89.6
N/A
N/A
N/A
N/A
11
64.1
64.1
62.1
66.2
74.5
74.5
78.6
78.6
64.1
64.1
64.1
N/A
N/A
74.5
N/A
N/A
N/A
N/A
12
44.8
44.8
53.8
55.8
60.0
60.0
62.1
62.1
44.8
44.8
54.5
N/A
N/A
60.0
N/A
N/A
N/A
N/A
13
31.0
31.0
44.8
44.8
44.8
44.8
44.8
44.8
31.0
31.0
44.8
N/A
N/A
44.8
N/A
N/A
N/A
N/A
14
17.2
17.2
31.0
31.0
31.0
31.0
31.0
31.0
17.2
17.2
31.0
N/A
N/A
31.0
N/A
N/A
N/A
N/A
15
N/A
11.0
17.2
17.2
17.2
17.2
17.2
17.2
11.0
11.0
17.2
N/A
N/A
17.2
N/A
N/A
N/A
N/A
16
N/A
6.9
11.0
11.0
11.0
11.0
11.0
11.0
6.9
6.9
11.0
N/A
N/A
N/A
N/A
N/A
N/A
N/A
17
N/A
N/A
6.9
6.9
6.9
6.9
6.9
6.9
N/A
N/A
6.9
N/A
N/A
N/A
N/A
N/A
N/A
N/A
18
Allowable stress
@ 260 1C
A 53 Gr. B
130.3
Mpa
wable stresses in tension for metals (Page 157 - 161)
93
149
200
14.6
14.6
14.2
14.2
300
204
260
316
343
371
400
13.7
13.7
500
13
13
600
11.8
11.8
650
11.6
11.6
13.8
13.8
-
14.8
14.8
14.8
14.8
14.8
14.5
14.5
14.5
14.5
14.5
415
415
154.5
154.5
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
399
427
454
482
510
538
566
593
750
10.3
10.3
800
9
9
850
7.8
7.8
900
6.6
6.5
950
1000
1050
1100
11.5
11.5
4.5
2.5
1.6
1
14.4
14.4
14.4
14.4
14.4
10.7
10.7
10.7
10.7
10.7
9.3
9.3
9.3
9.3
9.3
7.9
7.9
7.9
7.9
7.9
6.5
6.5
6.5
6.5
6.5
4.5
4.5
4.5
4.5
4.5
2.5
2.5
2.5
2.5
2.5
1.6
1.6
1.6
1.6
1.6
1
1
1
1
1
700
-
16.4
16.4
18.3
16
16
17.7
15.4
15.4
17.2
14.6
14.6
16.2
13.3
13.3
14.8
13.1
13.1
14.5
13
13
14.4
11.2
11.2
12
9.6
9.6
10.2
8.1
8.1
8.3
6.5 6.5
6.5 -
4.5
2.5
1.6
1
19.5
19.5
19.5
19.5
19.8
19.8
19.8
19.8
18.3
18.3
18.3
18.3
17.3
17.3
17.3
17.3
15.8
15.8
15.8
15.8
15.5
15.5
15.5
15.5
15.4
15.4
15.4
15.4
13
13
13
13
10.8
10.8
10.8
10.8
8.7
8.7
8.7
8.7
6.5
6.5
6.5
6.5
4.5
4.5
4.5
4.5
2.5 2.5
2.5
2.5
1.6
1.6
1.6
1
1
1
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
18.9
18.9
18.9
18.9
18.9
18.9
18.9
17.3
17.3
17.3
17.3
17.3
17.3
17.3
17
17
17
17
17
17
17
16.5
16.5
16.5
16.5
16.5
16.5
16.5
13
13
13
13
13
13
13
10.8
10.8
10.8
10.8
10.8
10.8
10.8
8.7
8.7
8.7
8.7
8.7
8.7
8.7
6.5
6.5
6.5
6.5
6.5
6.5
6.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
-
200
300
20
21
22
23.7
400
20
21
22
23.7
300
20.7
20.7
20.7
20.7
400
21.3
21.3
21.3
21.3
300
21.7
21.7
21.7
21.7
400
22.5
22.5
22.5
22.5
23.3
23.3
200
200
500
600
650
700
750
700
16.8
16.8
16.8
16.8
750
17
17
17
17
750
800
850
900
950
1000
1050
1100
1050
1100
20
21
22
23.7
500
20
20
20
20
600
18.9
18.9
18.9
18.9
500
650
17.3
17.3
17.3
17.3
20.5
20.5
20.5
20.5
48.7
48.7
48.7
48.7
600
18.4
18.4
18.4
18.4
650
18.3
18.3
18.3
18.3
700
14.8
14.8
14.8
14.8
22.9
21.6
19.7
19.4
19.2
800
13.9
13.9
13.9
13.9
850
11.4
11.4
11.4
11.4
800
12
12
12
12
14.8
900
9
9
9
9
850
9.3
9.3
9.3
9.3
12 -
950
6.5
6.5
6.5
6.5
900
6.5
6.5
6.5
6.5
1000
4.5
4.5
4.5
4.5
950
4.5
4.5
4.5
4.5
2.5 2.5
2.5
2.5
1000
2.5 2.5
2.5
2.5
1.6
1.6
1.6
1050
1.6
1.6
1.6
1
1
1
1100
1
1
1
25
25.7
27.3
30
25
25.7
27.3
30
25
25.7
27.3
30
A 106
A 134
A 135
A 139
A 179
A 333
A 334
A 369
A53
API5L
Tabla factor E (Table A-1B)
E factor for a given material and welding type Welding type
Seamless pipe
Electric resistance welded pipe
Electric fusion welded pipe, double butt, straight or spiral seam
Furnace butt welded
S
ERW
EFW
FBW
1
NA
NA
NA
NA
NA
0.8
NA
NA
0.85
NA
NA
NA
NA
0.8
NA
1
NA
NA
NA
1
NA
NA
NA
1
NA
NA
NA
1
NA
NA
NA
1
0.85
NA
0.6
1
0.85
0.95
0.6
1
2
Column:
2
3
4
5
Welding type
Column number
Quality factor for longitudinal weld joint
Seamless pipe
Elecric Resisitance Welded pipe
Electric FusionWelded pipe
Furnace Butt Welded pipe
Input
S
ERW
EFW
FBW
Output
1
2
3
4
Welding type from sheet Wall thickness
Input:
S
Output + 1
2
3
4
5
IF(S24=S13,1,IF(AND(S24=S14),2,IF(AND(S24=S15),3,IF(AND(S24=S16,4))))
Column =
2
Output
1
Material
Column
E-factor
A 53
2
1
VLOOKUP(L34,'4.- Tabla A-1B'!K12:O21,'4.- Tabla A-1B'!L23+1,FALSE)
Column
A-1B)
e Welding type
double butt, straight or spiral seam
. K12:O21
S24=S16,4))))
B'!L23+1,FALSE)
1
2
3
4
5
6
7
8
9
10
Coefficient Y
For t < d/6
VBA function y_ferritic
t=
y=
y=
t <=
Y=
ASME 304.1.1-304.2.1
Table 304.1.1.
VBA function y_ferritic
482
ºC
y_ferritic_t(I24)
#VALUE! -
482
0.4
ºC
-
t=
y=
y=
496
ºC
y_ferritic_t(I24)
#VALUE! -
t=
y=
y=
510
ºC
y_ferritic_t(I24)
#VALUE! -
H
ASME B1.20.1 83
Table 2. Basic dimensions of American National Standard Taper Pipe Thread
Tread Depth: TD
ASME B1.20.1-1983
Tabla 2
For a nominal diameter
Table 2 gives
2
11.5
in
Threads / in
Tabla 1
For
11.5
Threads / in
Table 2 gives a Height of Sharp V Thread
TD =
0.07531 in
TD =
1.91
mm
NPS
1/16
1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
Table 2.
Threads/in
27
27
18
18
14
14
11.5
11.5
11.5
11.5
8
8
8
8
8
Table 1
Threads/in
27
18
14
11.5
8
6
8
10
12
14
16
18
20
24
8
8
8
8
8
8
8
8
8
Height of Sharp V Thread
H=
0.07531 in
H=
1.91
mm
Height of Sharp V Thread
H=
H=
0.10825
2.75
Table 1
Threads/in H (mm)
27
0.814832
18
1.221994
14
1.571244
11.5
1.912874
8
2.74955
in
mm
H (in)
0.03208
0.04811
0.06186
0.07531
0.10825
tional Standard Taper Pipe Thread
H (mm)
0.814832
1.221994
1.571244
1.912874
2.74955
H (in)
0.03208
0.04811
0.06186
0.07531
0.10825
ASTM A106
Minimum wall thickness
Eq. (a)
ASTM A53
API 5L
ASTM A106
1-0.875
0.125
12.5
%
Mill tolerance for A 106
Eq. (a)
Minimum wall thickness & mill tolerance
A 106, App. X2. Minimum wall thickness
tmin =
tnom * 0.875
Eq. (a)
tmin : minimum wall thickness
tnom : nominal (average) wall thickness
0.875 : factor from A 103, Table X2.1
0.875: factor from A 53, 13.3
MT =
12.5
ASTM A 106
ASTM A 53
API 5L
ASTM A 106, ASTM A 53 and API 5L
Table 9.- Tolerances for Wall Thickness
Tolerance in percent of specified thickness
Mill tolerance
MT =
12.5
%
mill tolerance
wall thickness
all thickness
%
Size (inches)
1/2"
3/4"
1"
1 1/2"
2"
3"
4"
6"
8"
10"
12"
14"
16"
18"
20"
22"
24"
26"
28"
30"
36"
3.- RECOMMENDATIONS FOR MINIMUM THICKNESSES
CARBON STEEL
STAINLESS STEEL
API RP14E
CORPORATE INCL. API RP14E
CORPORATE
1.5mm CA
Min Sch
Min Thk
Min Sch
Min Thk
Min Sch
Min Thk
mm
mm
mm
Sch 160
4.78
Sch 80 or XS
3.73
Sch 80S
3.73
Sch 160
5.56
Sch 80 or XS
3.91
Sch 80S
3.91
Sch 80
4.55
Sch 80 or XS
4.55
Sch 80S
4.55
Sch 80
5.08
Sch 80 or XS
5.08
Sch 80S
5.08
Sch 80
5.54
Sch 80 or XS
5.54
Sch 80S
5.54
Sch 80
7.62
Sch 80 or XS
7.62
Sch 40S
7.62
Sch 40 or STD
6.02
Sch 40S
6.02
Sch 40 or STD
7.11
Sch 10S
7.11
Sch 20
6.35
Sch 10S
3.76
Sch 20
6.35
Sch 10S
4.19
Sch 20
6.35
Sch 10S
4.57
Sch 20
7.92
Sch 10S
4.78
Sch 20
7.92
Sch 10S
4.78
Sch 20
9.53
Sch 10S
4.78
Sch 20 or STD
9.53
Sch 10S
5.54
Sch 20 or STD
6.35
Sch 10S
6.35
Sch 20 or STD
9.53
Sch 10S
6.35
Sch 20 or XS
12.7
Sch 10
7.92
Sch 20 or XS
12.7
Sch 10
7.92
Sch 20 or XS
12.7
Sch 10
7.92
Sch 20 or XS
12.7
Sch 10
7.92
Mechanical
Strength
Requirement
Min Thk
mm
1
1
1.5
1.5
1.5
1.5
2
2
2.5
3
3.5
3.5
4
4.5
5
5.5
5.5
6
7
7.5
7.5
ASME B36.10M SCHEDULE / IDENTIFICATION
Size
1/2"
3/4"
1"
1.5"
2"
3"
4"
6"
8"
10"
12"
14"
16"
18"
20"
22"
24"
26"
28"
30"
32"
34"
36"
38"
40"
42"
44"
46"
48"
Size
1/2"
3/4"
1"
1.5"
2"
3"
4"
6"
8"
10"
12"
14"
16"
18"
20"
22"
24"
26"
28"
30"
32"
34"
36"
dext
Sch 60
0
0
0
0
0
0
0
0
10.31
12.7
14.27
15.09
16.66
19.05
20.62
22.23
24.61
0
0
0
0
0
0
Sch 80
3.73
3.91
4.55
5.08
5.54
7.62
8.56
10.97
12.7
15.09
17.48
19.05
21.44
23.83
26.19
28.58
30.96
0
0
0
0
0
0
Sch 100
0
0
0
0
0
0
0
0
15.09
18.26
21.44
23.83
26.19
29.36
32.54
34.93
38.89
0
0
0
0
0
0
Sch 120
0
0
0
0
0
0
11.13
14.27
18.26
21.44
25.4
27.79
30.96
34.93
38.1
41.28
46.02
0
0
0
0
0
0
Sch 140
0
0
0
0
0
0
0
0
20.62
25.4
28.58
31.75
36.53
39.67
44.45
47.63
52.37
0
0
0
0
0
0
Sch 160
4.78
5.56
6.35
7.14
8.74
11.13
13.49
18.26
23.01
28.58
33.32
35.71
40.49
45.24
50.01
53.98
59.54
0
0
0
0
0
0
STD
2.77
2.87
3.38
3.68
3.91
5.49
6.02
7.11
8.18
9.27
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
XS
3.73
3.91
4.55
5.08
5.54
7.62
8.56
10.97
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
ASME B36.19M & ASME B36.10M SCHEDULE / IDENTIFICATION
Sch 5S Sch 10S
Sch 10
Sch 20
Sch 30
Sch 40S Sch 40
1.65
2.11
0
0
2.41
2.77
2.77
1.65
2.11
0
0
2.41
2.87
2.87
1.65
2.77
0
0
2.9
3.38
3.38
1.65
2.77
0
0
3.18
3.68
3.68
1.65
2.77
0
0
3.18
3.91
3.91
2.11
3.05
0
0
4.78
5.49
5.49
2.11
3.05
0
0
4.78
6.02
6.02
2.77
3.4
0
0
0
7.11
7.11
2.77
3.76
0
6.35
7.04
8.18
8.18
3.4
4.19
0
6.35
7.8
9.27
9.27
3.96
4.57
0
6.35
8.38
9.53
10.31
3.96
4.78
6.35
7.92
9.53
0
11.13
4.19
4.78
6.35
7.92
9.53
0
12.7
4.19
4.78
6.35
7.92
11.13
0
14.27
4.78
5.54
6.35
9.53
12.7
0
15.09
4.78
5.54
6.35
9.53
12.7
0
0
5.54
6.35
6.35
9.53
14.27
0
17.48
0
0
7.92
12.7
0
0
0
0
0
7.92
12.7
15.88
0
0
6.35
7.92
7.92
12.7
15.88
0
0
0
0
7.92
12.7
15.88
0
17.48
0
0
7.92
12.7
15.88
0
17.48
0
0
7.92
12.7
15.88
0
19.05
Sch 60
0
0
0
0
0
0
0
0
10.31
12.7
14.27
15.09
16.66
19.05
20.62
22.23
24.61
0
0
0
0
0
0
Sch 80S
3.73
3.91
4.55
5.08
5.54
7.62
8.56
10.97
12.7
12.7
12.7
0
0
0
0
0
0
0
0
0
0
0
0
Sch 80
3.73
3.91
4.55
5.08
5.54
7.62
8.56
10.97
12.7
15.09
17.48
19.05
21.44
23.83
26.19
28.58
30.96
0
0
0
0
0
0
Sch 100
0
0
0
0
0
0
0
0
15.09
18.26
21.44
23.83
26.19
29.36
32.54
34.93
38.89
0
0
0
0
0
0
Sch 120
0
0
0
0
0
0
11.13
14.27
18.26
21.44
25.4
27.79
30.96
34.93
38.1
41.28
46.02
0
0
0
0
0
0
Sch 140
0
0
0
0
0
0
0
0
20.62
25.4
28.58
31.75
36.53
39.67
44.45
47.63
52.37
0
0
0
0
0
0
Sch 160
4.78
5.56
6.35
7.14
8.74
11.13
13.49
18.26
23.01
28.58
33.32
35.71
40.49
45.24
50.01
53.98
59.54
0
0
0
0
0
0
21.3
26.7
33.4
48.3
60.3
88.9
114.3
168.3
219.1
273
323.8
355.6
406.4
457
508
559
610
660
711
762
813
864
914
965
1016
1067
1118
1168
1219
Sch 5
1.65
1.65
1.65
1.65
1.65
2.11
2.11
2.77
2.77
3.4
3.96
3.96
4.19
4.19
4.78
4.78
5.54
0
0
6.35
0
0
0
Sch 10
2.11
2.11
2.77
2.77
2.77
3.05
3.05
3.4
3.76
4.19
4.57
6.35
6.35
6.35
6.35
6.35
6.35
7.92
7.92
7.92
7.92
7.92
7.92
Sch 20
0
0
0
0
0
0
0
0
6.35
6.35
6.35
7.92
7.92
7.92
9.53
9.53
9.53
12.7
12.7
12.7
12.7
12.7
12.7
Sch 30
2.41
2.41
2.9
3.18
3.18
4.78
4.78
0
7.04
7.8
8.38
9.53
9.53
11.13
12.7
12.7
14.27
15.88
0
15.88
15.88
15.88
15.88
Sch 40
2.77
2.87
3.38
3.68
3.91
5.49
6.02
7.11
8.18
9.27
10.31
11.13
12.7
14.27
15.09
0
17.48
0
0
0
17.48
17.48
19.05
XXS
7.47
7.82
9.09
10.15
11.07
15.24
17.12
21.95
22.23
25.4
25.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
25.4
31.75
0
0
0
0
0
0
0
0
0
0
0
0
0
STD
2.77
2.87
3.38
3.68
3.91
5.49
6.02
7.11
8.18
9.27
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
9.53
XS
3.73
3.91
4.55
5.08
5.54
7.62
8.56
10.97
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
XXS
7.47
7.82
9.09
10.15
11.07
15.24
17.12
21.95
22.23
25.4
25.4
0
0
0
0
0
0
0
0
0
0
0
0
1. Corrosion Allowance for ASME B31.3 Piping"
"Per Code, I have calculated a minimum pressure design thickness of
some 6" Sch. 80, ASTM A-335, P-11 Piping. How do you arrive at a figure
to allow for corrosion allowance. A corrosion allowance of 0.063" (1/16") is
typical, but is there a formula or table to provide this number? Does a
mandatory corrosion allowance have to be figured in to satisfy the Code?"
CA =
0.063
in
CA =
1.60
mm
B31.3 does not stipulate a corrosion
allowance (CA). Corrosion allowances are normally established by
the end user and are somewhat based on personal preferences
and industry tradition. 0.062" for piping is a common CA; however,
you are free to set whatever corrosion allowances you wish,
unless a state or local agency has adopted and superceded B31.3.
To specify the pipe, add the CA to the minimum design thickness
and select a pipe schedule that is equal to or greater than the
Min. + CA.
Corrosion Allowance
The corrosion allowance should be based on the required service life, acid concentration, temperature,
In general, the roof of a storage tank should be designed with a minimum 3 mm corrosion allowance. T
http://www.sulphuric-acid.com/techmanual/Storage/storagetanks.htm#Corrosion%20Allowance
2. Design pressure and temperature
acid concentration, temperature, geographic location and upon whether or not anodic protection or an internal protective coatin
um 3 mm corrosion allowance. The shell and tank bottom should have a minimum of 6 mm corrosion allowance.
Corrosion%20Allowance
n or an internal protective coating is installed.
rrosion allowance.
1
Appendix M. Guide to classifying fluid services
ASTM
A106,
API 5LAPI
and ASTM
A 53 Seamless
pipes. Pressure
and Temperature
ASTM
A106,
5L and
ASTMcarbon
A53steel
Seamless
Carbon
SteelRatings
Pipes - Pressure
Ratings
Pressure (kPa) and temperature (oC) ratings of ASTM A106, API 5L and ASTM A53 Seaml
temperatures ranging from -29ºC to 450ºC
Maximum allowable pressure and temperature ratings for petroleum refinery piping and chemical plant piping systems grade B with plane ends to ANSI/ASME B31.
Maximum Allowable Pressure (kPa)
Nominal
Size
(mm)
Wall
Thickness
(mm)
-67
205
2.77
3.73
4.78
7.47
2.87
3.91
5.56
7.82
3.38
4.55
6.35
9.09
3.56
4.85
6.35
9.7
3.68
5.08
7.14
10.16
3.91
5.54
8.74
11.07
5.16
7.01
9.53
14.02
5.49
7.62
11.13
15.24
6.02
8.56
137,800
34,416
48,092
62,830
98,245
28,070
39,418
58,152
83,107
26,251
36,283
52,481
77,030
21,614
30,178
40,596
64,601
19,444
27,402
39,738
58,779
16,378
23,653
38,866
50,793
17,914
24,818
34,615
53,081
15,558
21,986
33,079
46,976
13,187
19,058
137,800
34,416
48,092
62,830
98,245
28,070
39,418
58,152
83,107
26,251
36,283
52,481
77,030
21,614
30,178
40,596
64,601
19,444
27,402
39,738
58,799
16,378
23,653
38,866
50,793
17,914
24,818
34,615
53,081
15,558
21,968
33,079
46,976
13,187
19,058
Schedule no.
STD
XS
15
20
25
32
40
50
65
80
100
XXS
STD
XS
XXS
STD
XS
XXS
STD
XS
XXS
STD
XS
XXS
STD
XS
XXS
STD
XS
XXS
STD
XS
XXS
STD
XS
40
80
160
40
80
160
40
80
160
40
80
160
40
80
160
40
80
160
40
80
160
40
80
160
40
80
Temperature (oC)
260
Maximum Allowable Stres
130,221
32,528
45,466
59,378
92,836
26,526
37,247
54,955
78,539
24,804
34,285
49,594
72,793
20,421
28,518
38,364
61,045
18,375
25,900
37,599
55,547
15,468
22,351
36,731
48,003
16,929
23,447
32,714
50,159
14,969
20,780
31,253
44,392
12,464
18,010
120
160
100
125
150
XXS
STD
XS
XXS
STD
XS
XXS
STD
XS
40
80
120
160
40
80
120
160
20
30
40
60
80
100
120
140
XXS
200
STD
XS
XXS
250
160
20
30
40
60
80
100
120
140
160
20
30
STD
40
XS
XXS
300
STD
60
80
100
120
140
160
10
20
30
40
XS
60
80
100
350
11.13
13.49
17.12
6.55
9.53
12.7
15.88
19.05
7.11
10.97
14.27
18.26
6.35
7.04
8.18
10.31
12.7
150.9
18.26
20.62
22.23
23.01
6.35
7.8
9.27
12.7
15.09
18.26
21.44
25.4
28.58
6.35
8.38
9.53
10.31
12.7
14.27
17.48
21.44
25.4
28.58
33.32
6.35
7.92
9.53
11.13
12.7
15.09
19.05
23.83
25,190
31,019
40,348
11,561
17,060
23,130
29,407
35,897
10,550
16,474
21,745
28,325
7,138
7,924
9,246
11,741
14,572
17,452
21,345
24,308
26,334
27,340
5,698
7,028
8,385
11,596
13,863
16,922
20,036
23,998
27,229
4,795
6,359
7,241
7,854
9,722
10,969
13,525
16,736
20,015
22,682
26,740
4,361
5,457
6,580
7,717
8,833
10,541
13,421
16,949
25,190
31,019
40,348
11,561
17,060
23,130
29,407
35,897
10,550
16,474
21,745
28,325
7,138
7,924
9,246
11,741
14,572
17,452
21,345
24,308
26,334
27,340
5,698
7,028
8,385
11,596
13,863
16,922
20,036
23,998
27,229
4,795
6,359
7,241
7,854
9,722
10,969
13,525
16,736
20,015
22,682
26,740
4,361
5,457
6,580
7,717
8,833
10,541
13,421
16,949
23,805
29,310
38,129
10,921
16,122
21,855
27,787
33,926
9,928
15,571
20,553
26,768
6,745
7,489
8,737
11,093
13,766
16,488
20,174
22,971
24,877
25,838
5,388
6,642
7,923
10,955
13,098
15,992
18,934
16,474
25,734
4,534
6,008
6,842
7,421
9,191
10,363
12,850
15,819
18,913
21,435
25,273
4,120
5,161
6,222
7,310
8,351
9,963
12,684
16,019
350
STD
XS
400
STD
XS
450
STD
XS
500
STD
XS
600
120
140
160
10
20
30
40
60
80
100
120
140
160
10
20
30
40
60
80
100
120
140
160
10
20
30
40
60
80
100
120
140
160
10
20
30
40
60
80
100
120
140
160
27.79
31.75
35.71
6.35
7.92
9.53
12.7
16.66
21.44
26.19
30.96
36.53
40.49
6.35
7.92
9.53
11.13
12.7
14.27
19.05
23.83
29.36
34.93
39.67
45.24
6.35
9.53
12.7
15.09
20.62
26.19
32.54
38.1
44.45
50.01
6.35
9.53
12.7
14.27
17.48
24.61
30.96
38.89
46.02
52.37
59.54
19,933
22,964
26,051
3,810
4,768
5,746
7,703
10,176
13,208
16,274
19,409
23,130
25,824
3,383
4,230
5,099
5,967
6,835
7,696
10,349
13,043
16,219
19,464
22,282
25,638
3,038
4,582
6,139
7,317
10,080
12,898
16,171
19,085
22,475
25,450
2,529
3,810
5,097
5,739
7,055
10,018
12,691
16,102
19,223
22,048
25,279
19,933
22,964
26,051
3,810
4,768
5,746
7,703
10,176
13,208
16,274
19,409
23,130
25,824
3,383
4,230
5,099
5,967
6,835
7,696
10,349
13,043
16,219
19,464
22,282
25,638
3,038
4,582
6,139
7,317
10,080
12,898
16,171
19,085
22,475
25,450
2,529
3,810
5,097
5,739
7,055
10,018
12,691
16,102
19,223
22,048
25,279
18,837
21,703
24,618
3,603
4,507
5,429
7,283
9,618
12,478
15,378
18,341
21,855
24,404
3,197
3,996
4,816
5,643
6,456
7,276
9,784
12,326
15,323
18,389
21,056
24,225
2,873
4,327
5,801
6,911
9,522
12,188
15,287
18,037
21,242
24,094
2,391
3,603
4,816
5,423
6,670
9,467
12,002
15,220
18,168
20,835
23,888
Due to possible conversion of carbon to graphite (graphitization) - carbon steel pipes should be a
425oC. Instead Alloy steel should be used.
1)
1 Pa = 10-6 N/mm2 = 10-5 bar = 0.1020 kp/m2 = 1.02x10-4 m H2O = 9.869x10-6 atm = 1.45x10-4
T(oF) = [T(oC)](9/5) + 32
mperature
n SteelRatings
Pipes - Pressure and Temperature
ASTM A106, API 5L, and ASTM A53 seamless CS p
API 5L and ASTM A53 Seamless Carbon Steel Pipes at
stems grade B with plane ends to ANSI/ASME B31.3 Process Piping.
le Pressure (kPa)
Temperature (oC)
350
370
400
Maximum Allowable Stress (kPa)
117,130
115,752
89,570
29,255
28,910
22,372
40,878
40,396
31,260
53,404
52,777
40,837
83,507
82,522
63,857
23,860
23,578
18,245
33,506
33,106
25,617
49,429
48,843
37,799
70,643
69,809
54,024
22,310
22,048
17,060
30,862
30,474
23,584
44,606
44,082
34,112
65,476
64,704
50,070
18,369
18,155
14,049
25,651
25,348
19,616
34,505
34,099
26,389
54,906
54,266
41,988
16,529
16,329
12,636
23,295
23,019
17,811
33,816
33,416
25,858
49,966
49,374
38,205
13,925
13,759
10,645
20,105
19,871
15,378
33,037
32,652
25,266
43,173
42,670
33,017
15,227
15,048
11,644
21,097
20,849
16,129
29,420
29,076
22,503
45,116
44,585
34,498
13,222
13,063
10,108
18,693
18,472
14,290
28,111
27,780
21,497
39,928
39,459
30,536
11,210
11,079
8,571
16,198
16,012
12,388
4301)
450
74,412
18,589
25,969
33,929
53,053
15,158
21,283
31,398
44,881
14,173
19,595
28,339
41,595
11,672
16,295
21,924
34,884
10,550
14,800
21,483
31,742
8,847
12,774
20,987
27,429
9,674
13,401
18,693
28,662
8,399
11,871
17,859
25,369
7,124
12,094
59,943
14,972
20,918
27,333
42,739
12,209
17,142
25,293
36,152
11,417
15,785
22,827
33,506
9,404
13,125
17,659
28,097
8,454
11,919
17,308
25,569
7,124
10,287
16,908
22,096
7,793
10,797
15,055
23,088
6,766
9,563
14,386
20,436
5,739
8,289
21,407
26,368
34,298
9,825
14,503
19,657
24,997
30,516
8,924
14,007
18,448
24,074
6,063
6,732
7,855
9,977
12,388
14,834
18,148
20,656
22,386
23,240
4,844
5,974
7,131
9,853
11,781
14,386
17,032
20,394
23,143
4,072
5,402
6,153
6,676
8,268
9,322
11,492
14,227
17,011
19,278
22,730
3,707
4,644
5,595
6,559
7,510
8,964
11,410
14,407
21,159
26,058
33,892
9,708
14,331
19,430
24,701
30,158
8,819
13,842
18,265
23,784
5,994
6,656
7,765
9,860
12,237
14,655
17,935
20,415
22,124
22,964
4,789
5,905
7,048
9,736
11,644
14,214
16,825
20,153
22,875
4,024
5,540
6,084
6,601
8,165
9,212
11,362
14,062
16,811
19,051
22,461
3,665
4,589
5,533
6,477
7,421
8,861
11,272
14,242
16,371
20,160
26,230
7,510
11,093
15,034
19,113
23,337
6,828
10,707
14,138
18,410
4,637
5,147
6,008
7,627
9,474
11,341
13,876
15,799
17,115
17,769
3,707
4,568
5,450
7,538
9,012
10,996
13,022
15,599
17,700
3,114
4,134
4,706
5,015
6,318
7,131
8,792
10,879
13,008
14,744
17,383
2,831
3,548
4,279
5,016
5,739
6,855
9,723
11,017
13,601
16,750
21,786
6,243
9,212
12,492
15,881
19,388
5,370
8,895
11,747
15,296
3,852
4,279
4,995
6,339
7,868
9,426
11,527
13,125
14,221
14,765
3,080
3,796
4,527
6,263
7,483
9,136
10,817
12,960
14,703
2,591
3,431
3,914
4,244
5,250
5,925
7,303
9,040
10,804
12,244
14,441
2,356
2,949
3,555
4,168
4,768
5,691
7,248
9,157
10,995
13,208
17,549
5,038
7,421
10,059
12,795
15,620
4,568
7,165
9,460
12,319
3,100
3,445
4,024
5,105
6,338
7,593
9,288
10,569
11,458
11,892
2,480
3,059
3,652
5,043
6,028
7,359
8,716
10,438
11,844
2,088
2,763
3,149
3,417
4,230
4,768
5,884
7,283
8,702
9,866
11,630
1,895
2,377
2,866
3,355
3,845
4,589
5,836
7,372
16,943
19,519
22,144
3,238
4,051
4,885
6,545
8,654
11,224
13,835
16,481
19,657
21,952
2,873
3,597
4,334
5,071
5,808
6,545
8,799
11,086
13,787
16,543
18,941
21,793
2,574
3,893
5,216
6,215
8,564
10,962
13,746
16,226
19,106
21,675
2,150
3,238
4,334
4,878
5,994
8,516
10,783
13,690
16,336
18,741
21,489
16,743
19,292
21,883
3,197
4,004
4,830
6,470
8,550
11,093
13,670
16,302
19,430
21,697
2,839
3,555
4,286
5,016
5,739
6,463
8,695
10,955
13,622
16,350
18,713
21,531
2,556
3,852
5,154
6,146
8,468
10,831
13,580
16,033
18,879
21,421
2,129
3,197
4,286
4,823
5,925
8,420
10,659
10,528
16,150
18,520
21,235
12,960
14,931
16,936
2,474
3,100
3,734
5,009
6,614
8,585
10,576
12,616
15,034
16,784
2,198
2,749
3,314
3,879
4,437
5,002
6,725
8,475
10,542
12,650
11,483
16,660
1,977
2,976
3,989
4,754
6,552
8,385
10,514
12,409
14,614
16,577
1,647
2,474
3,314
3,734
4,589
6,511
8,254
10,466
12,491
14,331
16,433
10,762
12,402
14,069
2,060
2,577
3,100
4,126
5,498
7,131
8,785
10,480
12,492
13,945
1,826
2,287
2,756
3,225
3,686
4,155
5,588
7,042
8,757
10,507
12,030
13,842
1,640
2,474
3,314
3,948
5,443
6,966
8,730
10,307
12,140
13,766
1,364
2,060
2,756
3,100
3,810
5,409
6,856
8,695
10,383
11,906
13,649
8,675
9,990
11,334
1,660
2,074
2,501
3,349
4,430
5,746
7,076
8,440
10,059
11,238
1,474
1,839
2,219
2,598
2,969
3,349
4,499
5,670
7,055
8,468
9,694
11,155
1,323
1,991
2,666
3,183
4,382
5,608
7,035
8,302
9,777
11,093
1,102
1,660
2,219
2,494
3,066
4,361
5,519
7,007
8,364
9,591
10,996
carbon steel pipes should be avoided for temperatures above
= 9.869x10-6 atm = 1.45x10-4 psi (lbf/in2)
t=
d ext −2⋅Cext
−1. 155⋅P
⋅ 1−Exp
2
σ allow
[
(
)]
c: the sum of the mechanical allowances ( thread or gr
ci: internal allowances
co: external allowances
For macined surfaces or groves whre the tolerance is n
B31.3, K304 Pressure design of high pressure compon
For threaded components, the nominal thread depth (d
B31.3, K304 Pressure design of high pressure compon
API 5L, and ASTM A53 seamless CS pipes - Pressure and temperature ratings
[
⋅ 1−Exp
(
−1. 155⋅P
σ allow
)]
he mechanical allowances ( thread or groove depth) plus corrosion and erosion allowances.
urfaces or groves whre the tolerance is not specified, the tolerance shall be assumed to be 0.5 mm in addition to thespecified depth of the cut
Pressure design of high pressure componentes
omponents, the nominal thread depth (dimension H of ASME B1.20.1 or equivalent) shall pply, except the following four cases.
Pressure design of high pressure componentes
especified depth of the cut
wing four cases.
ANSI B16.5 - Maximum Pressure and Temperature Ratings
Non-shock pressure (psig) and temperature ratings for steel pipe flanges and flanged fittings
Maximum allowable non-shock pressure (psig) and temperature ratings for steel pipe flanges and flanged fittings according the American Natio
Maximum Allowable non-shock Pressure (psig)
Temperature
(oF)
Pressure Class (lb)
150
300
400
600
900
1500
450
1125
1500
2225
3350
5575
-20 to 100
285
740
990
1480
2220
3705
200
260
675
900
1350
2025
3375
300
230
655
875
1315
1970
3280
400
200
635
845
1270
1900
3170
500
170
600
800
1200
1795
2995
600
140
550
730
1095
1640
2735
650
125
535
715
1075
1610
2685
700
110
535
710
1065
1600
2665
750
95
505
670
1010
1510
2520
800
80
410
550
825
1235
2060
850
65
270
355
535
805
1340
900
50
170
230
345
515
860
950
35
105
140
205
310
515
1000
20
50
70
105
155
260
Hydrostatic Test Pressure (psig)
Maximum Allowable non-shock Pressure (bar g)
Temperature
(oF)
Pressure Class (lb)
150
300
400
600
900
1500
31.0
77.6
103.4
153.4
231.0
384.4
-20 to 100
19.7
51.0
68.3
102.0
153.1
255.5
Hydrostatic Test Pressure (bar g)
93
17.9
46.5
62.1
93.1
139.6
232.7
149
15.9
45.2
60.3
90.7
135.8
226.1
204
13.8
43.8
58.3
87.6
131.0
218.6
260
11.7
41.4
55.2
82.7
123.8
206.5
316
9.7
37.9
50.3
75.5
113.1
188.6
343
8.6
36.9
49.3
74.1
111.0
185.1
371
7.6
36.9
49.0
73.4
110.3
183.7
399
6.6
34.8
46.2
69.6
104.1
173.7
427
5.5
28.3
37.9
56.9
85.2
142.0
454
4.5
18.6
24.5
36.9
55.5
92.4
482
3.4
11.7
15.9
23.8
35.5
59.3
510
2.4
7.2
9.7
14.1
21.4
35.5
538
1.4
3.4
4.8
7.2
10.7
17.9
s and flanged fittings
flanged fittings according the American National Standard ANSI B16.5 - 1988.
2500
9275
6170
5625
5470
5280
4990
4560
4475
4440
4200
3430
2230
1430
860
430
2500
639.5
425.4
387.8
377.1
364.0
344.0
314.4
308.5
306.1
289.6
236.5
153.8
98.6
59.3
29.6
ANSI B16.5 - Maximum Pressure and Temperature Ratings
Non-shock pressure (psig) and temperature ratings for steel pipe flanges and flanged fi
for steel pipe flanges and flanged fittings
Sample wall thickness calculation according Process Piping [4], page 28
t = tbasic (Eq. 3a)
OT = CA + TD
Reference [ 4 ] uses following relation
for the calculation of the minimum
pipe thickness:
t req
T̄ min=
( 4 . 10)
0 . 875
The requirement to be acomplished
is that the nominal wall thickness t nom
shall be grater than the minimum wall
thickness t min
t nom > T̄ min
Eq .(f )
treq = tBasic + OT
Microsoft Equation
3.0
tm =
t + CA + TD
mm
t=
0.009 in
0.24
CA =
TD =
tm =
0.063 in
0.07 in
1.59
1.78
0.14 in
3.60
d=
sch =
s=
2
in
80
### in
mm
Method from Process Piping [4]
#VALUE!
Basic thickness
acc. ASME B31.3, Eq. (3a)
t Basic=
t=
P=
d=
sallow =
E=
Y=
tBasic =
P⋅d ext
2⋅[ σ⋅E+ P⋅Y ]
( 3 a)
P * dext / ( 2* (sallow * E + P* Y) )
1.03
#VALUE! mm
130.3
1
0.4
MPa
-
#VALUE! mm
Over thickness
OT =
CA + TD
CA =
1.59
TD =
1.91
OT =
MPa
3.50
mm
mm
mm
Required thickness
treq =
tBasic + OT
tBasic =
OT =
treq =
#VALUE! mm
3.50
mm
#VALUE! mm
Set of equations (e) and (f) applied in
reference [4]
Set of equations from ref [ 4 ]
t req
t min >
Eq .( e)
MT
- with its requirement
t nom > t min
Eq .(f )
Minimum thickness
tmin =
treq =
Tol =
tmin =
Selected pipe
mat:
dn =
SCH =
Nominal pipe tickness
s=
tnom =
t req
MT
- with its requirement
t nom > t min
t min >
Eq .( e)
Eq .(f )
Procedure according Process Piping [4
11.-Mill tolerance (
tmin =
treq /Tol
treq =
Tol =
tmin =
###
0.875
###
12. Requirement
tnom >
tmin
tnom =
tmin =
Microsoft Equation
3.0
###
###
#VALUE!
1.- Data
Material: CS A53 pipe
NPS 2, threaded
Design pressure
4.- Longitudinal weld joint value "E"
(Seamless pipe)
Sheet 4
dn =
Design temperature
P=
P=
temp =
2
150
1.03
500
Corrosion allowance
temp =
CA =
260 °C
1/16 in
Allowable stress
CA =
0.0625 in
CA =
sallow =
18,900 psi
de =
Exterior diameter
Thread depth
in
psi
MPa
°F
ASME B31.3, Table A-1B
Longitudinal weld joint
Type S
E=
1
5.- Coefficient Y
ASME 304.1.1-304.2.1
Table 304.1.1.
1.59 mm
t <=
482
Y=
0.4
TD =
2.375 in
0.07 in
6.- Basic thickness
TD =
1.78 mm
acc. ASME B31.3, Eq. (3a)
(For TD, Value from Table 1 will be used)
t Basic =
2.- Pipe exterior diameter
dn =
2
in
de =
Sheet 5
tBasic =
#VALUE! mm
P=
d=
sallow =
3. Allowed stress
For A 53 Gr. B_ (Table A-1, sheet 3)
sallow =
130.3 MPa
E=
Y=
tBasic =
P⋅d ext
tm / 0.875
tm =
0.14
0.875
in
3.6
Tmin =
0.16
in
4.12 mm
[4], (4.10)
Table 2
mm
P * dext / ( 2* (sallow * E + P* Y
1.03
MPa
#VALUE! mm
130.3
1
0.4
s=
0.16
in
#VALUE! in
#VALUE!
4.12 mm
### mm
=
ASME B1.20.1-1983
Sheet 6
2
11.5
Sheet 6
For a number of threads
Tmin =
MPa
-
#VALUE! mm
For a nominal diameter
Table 2 gives
Tabla 1
( 3 a)
2⋅[ σ⋅E+ P⋅Y ]
7.- Tread Depth: TD
Tmin =
ºC
11.5
Table 2 gives a Height of Sharp V Thread
TD =
0.07531 in
TD =
1.91
mm
Minimum thickness
treq / Tol
#VALUE! mm
0.875
#VALUE! mm
Selected pipe
CS
2
80
in
Nominal pipe tickness
Pipe_Imp_CS_Thickness_dn_sch
#VALUE! mm
tnom > tmin
9.- Required thickness (treq)
ASME B31.3, #304.1.1, Ec. (2)
treq =
tBasic + OT
tBasic =
OT =
treq =
Set of equations (a) and (b) applie
(Sheet 1)
#VALUE! mm
3.50
mm
#VALUE! mm
10.- Selected shedule (SCH) and resulting thickness
SCH =
80
(Note 8)
9
by the standard ASTM A 106
Set of equations AS
t min=t nom⋅MT
- with its requiremen
t min > t req
dn =
s=
tnom =s =
2
in
Pipe_Imp_CS_Thickness_dn_sch
#VALUE! mm
ure according Process Piping [4]
(Note 9)
Eq. (e)
mm
-
t min=t nom⋅MT
- with its requiremen
t min > t req
(Sheet 7)
mm
Eq. (f)
Procedure according ASTM A 106
11.-Mill tolerance (MT) (Note 9)
tmin = tnom * Tol
Eq. (a)
tnom =
#VALUE! mm
Tol =
tmin =
#VALUE!
Eq. (b)
mm
#VALUE!
#VALUE!
mm
Although the set of equations applied by ref [4] and
by ASME standard are different, both are equivalent.
See
(Sheet 16. Mil tolerance)
mm
#VALUE!
treq =
mm
#VALUE!
(Sheet 7)
12. Requirement
tmin >
treq
tmin =
mm
0.875
Return to sheet Wall thickness
1
8.- Over Thickness "OT"
OT =
CA + TD
CA=
TD =
OT =
1.59
1.91
3.50
mm
mm
mm
=
0.14 in
=
in
#VALUE!
9.- Required thickness (treq)
ASME B31.3, #304.1.1, Ec. (2)
tm = treq = tBasic + OT
tBasic =
OT =
tm = treq =
#VALUE! mm
3.50
mm
#VALUE! mm
10.- Minimum thickness tmin
tmin =
tm = treq =
(sallow * E + P* Y) )
MT =
tmin =
treq / MT
[4], equation (4.10)
#VALUE!
0.875
#VALUE! mm
=
in
#VALUE!
11.- Selected schedule
SCH =
80
12.- Nominal thickness
in
#VALUE!
ASME B1.20.1-1983
in
Threads / in
Threads / in
harp V Thread
s=
dn =
SCH =
tnom = s =
Pipe_Imp_CS_Thickness_dn_sch
2
#VALUE! mm
13. Requirement
tnom >
tmin
tnom =
tmin =
in
80
5.54
=
#VALUE!
Eq. (f)
mm
#VALUE! mm
#VALUE!
0.218
#VALUE!
Note. This requirement is used in[4]. Is a valid method.
(see page 3)
2
3
Set of equations (a) and (b) applied
by the standard ASTM A 106
Set of equations ASTM A 106
t min=t nom⋅MT
Eq .( a)
- with its requirement
t min > t req
Eq .( b)
t min=t nom⋅MT
Eq .( a)
- with its requirement
t min > t req
Eq .( b)
4
Carbon steel pipes
dn
in
1/2
3/4
1
1 1/2
2
3
4
5
6
8
10
12
Sch
5
10
20
30
40
60
80
100
120
140
160
STD
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
XS
XXS
For pressure rating and piping class, see file
Maximum allowable pipe pressures for A53, A106 and API 5L seamless pipes _­CS flanges Press.-Temp. ratings
Sheet:
CS flanges-Press & Temp ratings
Maximum temperature and pressure ratings of flanges conforming dimensions ASME B16.5 Pipe Flanges and Flanged Fittings
and materials specification to ASTM A-105 Specification for Carbon Steel Forgings for Piping Applications - temperature
in Celcius degrees and pressure in bar
For maximum allowable pressures see file
Maximum allowable pipe pressures for A53, A106 and API 5L seamless pipes _­CS flanges Press.-Temp. ratings
Sheet:
Max. Allowable Pressures
Maximumm allowable pressures [Mpa], for seamless pipes, steels grade B: A53, A106 and d API 5L, for nominal
and schedule "Sch", acording "Ec 3a", ASME B31.3, temperatures from 38°C to 593°C. (E = 1 and Y = 0,4)
nges Press.-Temp. ratings
B16.5 Pipe Flanges and Flanged Fittings -
Applications - temperature
nges Press.-Temp. ratings
53, A106 and d API 5L, for nominal diameter "d n"
°C. (E = 1 and Y = 0,4)
Required thickness
treq =
tdis + OT
Mill tolerance
(2)
treq: minimum required thickness,
including mechanical, corrosion
and erosion allowances
treq (also tm), according
ASME B31.3, #304.1.1, Eq. (2)
(see sheet B31.3_304)
tdis (also t) pressure design
thickness, as calculated in
accordance with para. 304.1.2
for internal pressure, Eq (3a)
(see sheet B31.3_304)
Design thickness
P⋅D
t dis =
2⋅( S⋅E+P⋅Y )
(3a )
OT: Over thickness (also c)
OT =CA+ TD
OT: the sum of the mechanical
allowances (thread or grove
depth) plus corrosion and
erosion allowances.
CA: Corrosion allowance
TD: Thread Depth
Microsoft Equation
3.0
Comparison between the use
indicated in ASTM A 53 /A 106
and the use indicated in [4]
Eq. (a)
Reference [ 4 ]
This reference gives following equation
to consider the mill tolerance
t req
t min >
Eq .(e )
MT
and the requirement to be acomplished
is that the nominal wall thickness t nom
shall be grater than the minimum wall
thickness t min
t nom > t min
Eq . (f )
Reference ASTM A106
This reference gives following equatio
to consider the mill tolerance
t min=t nom⋅MT
Eq .(a)
and the requirement to be acomplished
is that the minimum thickness t min
shall be grater than the required
thickness t req
MT
and the requirement to be acomplished
is that the nominal wall thickness t nom
shall be grater than the minimum wall
thickness t min
t nom > t min
Eq . (f )
Replacing equation (e ) into equation ( f )
t req
t nom > t min >
MT
t
t nom > req
Eq .( g)
MT
t min=t nom⋅MT
Eq .(a)
and the requirement to be acomplished
is that the minimum thickness t min
shall be grater than the required
thickness t req
t min > t req
Eq .(b)
Set of equations from ref [ 4 ]
t req
t min >
Eq .( e)
MT
- with its requirement
t nom > t min
Eq .(f )
Set of equations from ASTM A106
t min=t nom⋅MT
Eq .(a)
- with the requirement
t min > t req
Eq .(b)
Microsoft Equation
3.0
ASTM A 53/ ASTM A 106
Sheet "14. Example" [4]
For the example in sheet "Wall thickness"
For the example in sheet "14. E
dn =
2
sch =
80
"
dn =
sch =
the nominal thickness is
tnom =
5.54
the nominal thickness is
tnom =
mm
For the example conditions, the required thickness is
treq =
3.74
mm
For the example conditions, the
treq =
According A 53 and A 106, the minimum wall thickness is
According [4], Eq. (4.10)
(see sheet "7. MT"
(see sheet "14. Example)
tmin =
tmin =
tnom * 0.875
4.85
Eq. (a)
mm
The requirement that must be fulfilled is that the minimum
value of the pipe thickness shall be greater than the
calculated required thickness
tmin =
tmin =
The requirement that must be fu
value of the pipe thickness sha
calculated minimum thickness
tmin >
treq
tnom >
Eq. (b)
In this case, the selecterd shedule is correct since
4.85
>
3.74
In this case, the selecterd shedu
5.54
[5] ASTM A106
[4]
Eq. (a)
Tmin = minimum wall thicknes
tn = nominal wall thickness
Applicatioin in
Sheet "Wall thickness"
Applicatioin in
Sheet "14. Example"
Rated thickness
Thickness to be applied in the
the calculations, for a selected
Pipe dimensions
de = Pipe_SI_SS_Dext_dn
dext =
di =
pipe (rated thickness).
di =
Rated thickness
trated =
[6]
tNom * 0.875 - tAllowances
Data of application example
Material:
SS
t=
tNom =
###
mm
Pipe_SI_SS_Dint_dn_sch
###
mm
Pipe_SI_SS_Thickness_dn_sch
###
mm
Basic thiskness acc. B31.3 (3a)
t = P * dext / ( 2* (st,max * E*W + P* Y) )
tBasic =
### mm
P=
2.0
MPa
dn =
300
mm
st,max =
34.5
Mpa
E=
1.0
-
W=
1.0
-
tcorr =
1.59
mm
Y=
0.4
-
tthread =
0.0
mm
tallowances =
1.59
mm
Allowances
Allowances considered
tallowances = tcorr + tthread
tcorr =
1.59
mm
tthread =
0.0
mm
Shedule initialy assumed
sch
80S
-
Rated thickness
trated =
tNom * 0.875 - tAllowances
tNom =
#VALUE!
mm
tallowances =
1.59
mm
trated =
###
mm
ASTM A 53
Reference [4]
tmin >= 0.875 * tnom
Eq. (a)
tmin >= treq / 0.875
(4.10)
tnom: nominal (average) wall thickness
tmin: minimum wall thickness
Minimum pipe thickness
ASTM 106
Reference [ 4] uses following relation
for the calculation of the minimum
pipe thickness:
t req
T̄ min=
( 4.10)
0.875
see sheet 14. Example
Minimum wall thickness on inspection for
Nominal (Average) pipe wall thickness
13.3 Thickness- The minimum wall thickness
" tmin" at any point shall not be more than 12.5 %
under the nominal wall thckness specified " tnom"
The requirement that must be fulfilled, is that the
minimum value of the pipe thickness shall be
greater than the calculated required thickness
tmin >
treq
Eq. (b)
The requirement to be acomplished
is that the nominal wall thickness t nom
shall be grater than the minimum wall
thickness t min
t nom > t min
Eq .(f )
tnom >
tmin
Microsoft Equation
3.0
Eq. (f)
In page 2 it is shown that the set of equations (a) and (b) is equivalent to the set of equations (4.10) and (f)
In page 3 it is shown the application of both cases.
Mill tolerance MT
According ASTM A 106 and ASTM A53,
the minimum wall thickness t min is
t min=t nom⋅MT
Eq .(a )
(see sheet 7. MT )
Dividing both sides of eq
t nom⋅MT > treq
by MT, one obtains
t req
t >
Mill tolerance MT
According ASTM A 106 and ASTM A53,
the minimum wall thickness t min is
t min=t nom⋅MT
Eq .(a )
(see sheet 7. MT )
where
t min : minimum wall thickness
mm
t nom : nominal (average) wall thickness mm
(this is the standard dimension, in this application,
according to ANSI B36 .10M)
MT: mill tolerance ( in this case: 0.875)
The requirement to be acomplished is that the
minimum wall thickness t min shall be greater
than the calculated required thickness t req
t min > t req
Eq .(b)
Replacing equation (a) into equation (b)
the relation between the nominal thickness
and the calculated required thickness is
t nom⋅MT > t req
Eq .( c)
M A106
ives following equation
mill tolerance
Eq .(a)
ment to be acomplished
mum thickness t min
han the required
Equating equation
tmin =t nom⋅MT
Eq .(a)
with equation
t min > t req
Eq .(b)
one has
t nom⋅MT > treq
Eq .(c)
Dividing both sides of equation
Dividing both sides of eq
t nom⋅MT > treq
by MT, one obtains
t req
t nom >
MT
Microsoft Equation
3.0
According ASTM A 106 and
t req
t nom >
Eq
MT
And according Ref 4,
t req
t nom >
MT
Eq
Eq .(a)
ment to be acomplished
mum thickness t min
han the required
t min > t req
Eq .(b)
one has
t nom⋅MT > treq
Eq .(c)
Dividing both sides of equation
by MT
t nom⋅MT treq
>
MT
MT
one obtains
t req
t nom >
Eq .(d )
MT
Eq .(b)
ns from ASTM A106
T
Eq .(a)
quirement
Eq .(b)
Microsoft Equation
3.0
Microsoft Equation
3.0
Sheet "14. Example" [4]
For the example in sheet "14. Example"
2
"
80
the nominal thickness is
5.54
mm
For the example conditions, the required thickness is
3.74
mm
According [4], Eq. (4.10)
(see sheet "14. Example)
treq / 0.875
4.27
Eq. (4.10)
mm
The requirement that must be fulfilled is that the nominal
value of the pipe thickness shall be greater than the
calculated minimum thickness
And according Ref 4,
t req
t nom >
MT
Eq
thus both references have an
requirement, although the ca
procedure is different .
tmin
In this case, the selecterd shedule is correct since
>
4.27
Process Piping
Charles Becht
ASME Press. New York 2002
Tmin = minimum wall thickness
tn = nominal wall thickness
Applicatioin in
Sheet "14. Example"
Requisite
_SS_Dext_dn
_SS_Dint_dn_sch
[6]
trated >=
tBasic
trated =
###
mm
no more than 87.5 % of the nominal wall
tBasic =
###
mm
thickness of listed pipes less allowances
#VALUE!
applied for the pipe
Pipe components should be rated using
trated = tNom * 0.875 - Allowances
SS_Thickness_dn_sch
cc. B31.3 (3a)
(st,max * E*W + P* Y) )
Thus, a SS pipe with a nominal
dn =
300
mm
Note 1
and a shedule
Pipe basic allowable stress
sch =
80S
-
which has a nominal thickness
tNom =
#VALUE!
mm
at maximum temperature
Table A-1, ASME B31.3
t=
300
ºF
accomplish with ASME B31.3
sallow =
16.7
ksi
requirements.
sallow =
115.1
MPa
For strength calculations, the
thickness to be used is
Maximum tension stress
st,max =
sallow * (sb/sallow)
75 - tAllowances
trated =
###
mm
st/sallow =
0
sallow =
115.1
MPa
st,max=
0.00
MPa
The value of the security factor
st/sallow =
0.3
is not fundamented and is
mantained to follow the example
Return to sheet Wall thickness
1
Microsoft Equation
3.0
Microsoft Equation
3.0
g both sides of equation
T > treq
Eq .( c)
, one obtains
t req
Eq .(d )
2
g both sides of equation
T > treq
Eq .( c)
, one obtains
t req
Eq .(d )
MT
Microsoft Equation
3.0
3
STM A 106 and ASTM A53,
Eq .(d )
g Ref 4,
Eq .( g)
g Ref 4,
Eq .( g)
erences have an equivalent
although the calculation
different .
Microsoft Equation
3.0
4
should be rated using
% of the nominal wall
pes less allowances
875 - Allowances
page 1 of 1
[1]
[2]
ASME B1.20.1 83
Table 2. Basic dimensions of American
National Standard Taper Pipe Thread
[3]
American National Standard ANSI B16.5 - 1988.
[4]
Process Piping
Charles Becht
ASME Press. New York 2002
[5]
ASTM A 106 - 99