Pipe wall thickness calculation according ASME B31.3 [1]
Data
Pipe (CS) material (Note 0)
Weld joint type
(Note1)
Nominal diameter
Design pressure
Design temperature
Corrosion allowance
Thread (Yes/No)
1.-Pipe exterior diameter
de =
Pipe_Imp_CS_Dext_dn
dn =
8
in
de =
#ADDIN?
mm
A 106 Gr. B
2.-Material allowable stress
ASME B31.1,Table A-1 (sheet 3)
sallow =
137.9
ERW
dn =
8
1.03
150
1
No
P=
temp =
TC =
Thread =
in
MPa
ºC
mm
Basic thickness
P⋅d e
t basic =
Eq . ( 3 a )
2⋅[ σ⋅E + P⋅Y ]
MPa
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,
and a longitudinal weld
(Sheet 4)
#ADDIN?
(Note 5)
Ferritic_steel
and Temperature:
150
s: material allowable stress
E: Quality factor
[mm]
[MPa]
[-]
"y coefficient"
y=
Y: coefficient from Table 304.1.1
[-]
6.- Basic thickness acc. B31.3 (3a)
tbasic =
P * de / ( 2* (st,max * E + P* Y) )
0.4
from sheet 4.- Tabla A-1B, for the selected
material and weld joint type.
ºC
(Sheet 5)
P=
de =
1.03
MPa
#ADDIN?
mm
st,max =
E=
y=
137.9
NA
0.4
MPa
-
tbasic =
#ADDIN?
mm
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 )
Other check
No
8
8
0.00
in
threads/inch
mm
a.- Nominal thickness
tnom =
#ADDIN?
b.- Worst case of nominal thickness
tnom:WC =
tnom * 0.875
TC + TD
TC =
TD =
1.00
0.00
mm
mm
tallowances =
1.00
mm
tnom =
#ADDIN?
mm
tnom.WC =
#ADDIN?
mm
Note 9
#ADDIN?
(Note 10)
80
Note 8
c.- Basic thickness
tbasic =
9.- Schedule selected
Sch =
Note 7
mm
(Note 8)
(Nota 9)
8.- Allowances (Over Thickness)
tallowances =
Select welding type from data validation list
S
Seamless pipe
ERW
Elecric Resisitance Welded pipe
EFW
Electric FusionWelded pipe
FBW
Furnace Butt Welded pipe
(Sheet 3)
5.- "y" coefficient for equation (3a)
Tabla 304.1.1 should be used for t < d/6
d=
#ADDIN?
mm
d/6 =
#ADDIN?
mm
ASME 304.1.1-304.2.1, Table 304.1.1. gives for:
material type:
[mm]
[Mpa gauge]
(Note 7)
Note 1
(Note 3)
(Note 4)
Material:
A 106 Gr. B
type:
ERW
ASME B31.3, Tabla A-1B gives
E=
NA
(3a of ASME B31.3 paragraph 304.1.2
7. Thread depth
Thread =
For
dn =
NT =
TD =
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
P: design internal pressure
de: pipe exterior diameter
Note 0
mm
Note 10
d.- Basic and Allowances thickness
tbasicAll =
10.- Nominal thickness
tnom =
dn =
Sch =
tnom =
Pipe_Imp_CS_Thickness_dn_sch
8
80
in
#ADDIN?
tbasic + tAllowances
tbasic =
#ADDIN?
mm
tallowances =
1.00
mm
tbasicAll =
#ADDIN?
mm
mm
e.- Requisite
11.- Rated thickness
trated =
tnom * 0.875 - tAllowances
tNom =
#ADDIN?
tallowances =
1.00
mm
trated =
#ADDIN?
mm
mm
tnom.WC >=
tBasicAll
tnom.WC =
#ADDIN?
mm
tbasicAll =
#ADDIN?
mm
#ADDIN?
Dt =
#ADDIN?
mm
12.- Requisite
trated >=
tBasic
trated =
#ADDIN?
mm
#ADDIN?
#ADDIN?
mm
#ADDIN?
mm
tBasic =
Dt =
If there is thread, Tables 2 and Tab 3 deliver the depth of thread (Note
Table 1 and 2, from sheet 6
Material allowable stress (Note 3)
t=
150
°C
(For t < 38 °C, the table uses 38 °C)
Row =
2
(Selected material)
From sheet 3
Matrix Table_2
Col_A =
5
tA =
148.9
°C
sA =
137.9
MPa
Table_2
Col_B =
6
tB =
204
°C
sB =
137.9
MPa
NPS
1/16
1/8
1/4
3/8
1/2
3/4
1/1
5/4
3/2
2/1
5/2
3/1
7/2
4/1
5
6
sB + (sA - sB) * (tb - t)/(tb - ta)
137.9
MPa
S=
S=
Factor "E" from sheet 4.- Tabla A-1B, Table A-1B (Note 4)
Material
Welding type
E-factor
A 106
ERW
NA
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
mat. number
1
2
3
4
Austenitic_steel
Cast_iron
Ferritic_steel
Other_ductile_metals
1
Y=
Y=
2
°C
(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
3
566
3
0.4
N/A
0.7
0.4
5
8
10
12
14
16
18
20
24
Threads/in
27/ 1
27/ 1
18/ 1
18/ 1
14/ 1
14/ 1
23/ 2
23/ 2
23/ 2
23/ 2
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
8/ 1
Use of VBA function
y=
y_ferritic_t(t)
t=
482
y=
#ADDIN?
ºC
-
Validation list for CS pipes
dn
in
1/ 2
3/ 4
1
3/ 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
1
he given longitudinal weld type
sisitance Welded pipe
eet: 3.- B31.3_Table A-1
determined by interpolation
e selected material and
2
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.
Table 2, ASME B1.20.1-1983, gives the number of
threads per inch
For a number of threads per inch NT, Table 1,
ASME B1.20.1-198 gives a thread depth TD
Select a shedule, that with the used nominal
diameter, will satisfy the requirements.
3
es 2 and Tab 3 deliver the depth of thread (Note
Matrix Table_1
Table_ 1
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.
4
ASME B31.3 - 2002 - 1
ASME B31.3, #304.1.1, Eq. (2)
Equation (3a) of ASME B31.3 paragraph
t:
pipe wll thickness (measure or minimum per
purchase specification
internal design pressure gauge
Exterior pipe diameter [mm]
Stress value for materialfrom Table A-1
quality factor from Table A-1A or A-1B
coefficient from Table 304.1.1 , valid for
P:
dext:
s=
E:
Y:
Y=
t=
⟩t=
d int +2⋅c
d ext + d int +2⋅c
P⋅d ext
2⋅[ σ⋅E + P⋅Y ]
⟩ or
P⋅( d int + 2⋅c )
2⋅[ σ⋅E − P⋅( 1 −Y ) ]
¿
}
¿
t < ( d ext / 6 )
(3 a )
( 3 b)
⟩t=
2⋅[ σ⋅E + P⋅Y ]
⟩ or
P⋅( d int + 2⋅c )
2⋅[ σ⋅E − P⋅( 1 −Y ) ]
¿
}
¿
t < ( d ext / 6 )
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=
482
0.4
ºC
( 3 b)
ASME B31.3 # 303. Pressure design of componentes
ME B31.3, #304.1.1, Eq. (2)
uation (3a) of ASME B31.3 paragraph 304.1.2
[Pa]
[Pa]
t < dext / 6
t ≥ dext / 6
(3 a )
]
c
)
−Y ) ]
/ 6
)
( 3 b)
]
c
)
−Y ) ]
/ 6
)
( 3 b)
ASME code for pressure piping, B31
ASME B31.3-2002
Chapter 1. Scope and Definitions
ME code for pressure piping, B31
ME B31.3-2002
apter 1. Scope and Definitions
FSC :
Material =
Type :
D
ASTM A 53
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
Allowable stress as function of temperature [MPa]
2
1
Spec & Grade
1
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Type F
2
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
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
427
454
482
102.0
119.3
102.0
119.3
135.8
102.0
119.3
119.3
102.0
119.3
119.3
102.0
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
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
130.3
119.3
117.2
113.8
89.6
74.5
60.0
44.8
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
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
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
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
285 Gr. A
285 Gr. A
285 Gr. B
285 Gr. B
285 Gr. B
516 Gr. 60
515 Gr. 60
515 Gr. 61
516 Gr. 62
516 Gr. 65
515 Gr. 65
515 Gr. 65
516 Gr. 65
516 GR. 70
515 GR. 70
515 GR. 70
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
800
850
900
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
13
10.8
8.7
6.5
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
6.5
6.5
6.5
6.5
6.5
6.5
6.5
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
A
A
A
516
515
516
515
Gr.
Gr.
Gr.
Gr.
60
60
65
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
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
A
A
A
A
A
A
A
A
A
516
515
285
285
515
516
515
516
515
516
GR. 70
GR. 70
Gr. A
Gr. B
Gr. 61
Gr. 62
Gr. 65
Gr. 65
GR. 70
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
16
538
16
17
566
17
18
593
18
17.2
11.0
6.9
17.2
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
17.2
11.0
6.9
17.2
N/A
N/A
17.2
N/A
N/A
17.2
11.0
6.9
17.2
N/A
N/A
N/A
N/A
N/A
17.2
11.0
6.9
17.2
N/A
N/A
17.2
11.0
6.9
N/A
N/A
N/A
N/A
N/A
N/A
17.2
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
16
N/A
17
N/A
18
Allowable stress
@ 260 1C
14
A 53 Gr. B
130.3
Mpa
510
538
566
593
31.0
31.0
31.0
31.0
17.2
17.2
17.2
17.2
11.0
6.9
11.0
6.9
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
31.0
17.2
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
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
510
538
566
593
950
1000
1050
1100
4.5
4.5
4.5
4.5
2.5
2.5
2.5
2.5
1.6
1.6
-
1
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
4.5
2.5
-
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 - 161)
38
93
149
14.2
14.2
204
260
316
343
371
399
427
454
482
510
400
13.7
13.7
500
13
13
600
11.8
11.8
650
11.6
11.6
750
10.3
10.3
800
9
9
850
7.8
7.8
900
6.6
6.5
950
11.5
11.5
13.8
13.8
-
14.8
14.8
14.8
14.8
14.8
14.5
14.5
14.5
14.5
14.5
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
Material
A 285 Gr. A
A 285 Gr. A
Spec
A 134
A 672
Grade
…
A45
to
100
15
15
200
14.6
14.6
Butt weld
smls
API 5L
API 5L
A25
A25
15
15
415
415
A 53
Gr. A
16
16
16
16
16
A 53
A 106
A 135
A 369
API 5L
A
A
A
FPA
A
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
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
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
A
A
A
A
A
A
A
A
CC60
C860
B60
C60
20
20
20
20
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
B
B
6
6
FPB
Y35
B
20
20
20
20
20
20
20
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
Type F
516
515
515
516
Gr.
Gr.
Gr.
Gr.
60
60
61
62
671
671
672
672
A 53
A106
A 333
A 334
A 369
A 381
API 5L
300
154.5
154.5
700
4.5
-
100
API
API
API
API
5L
5L
5L
5L
X42
X46
X52
X56
200
20
21
22
23.7
100
A
A
A
A
516
515
515
516
Gr.
Gr.
Gr.
Gr.
65
65
65
65
A
A
A
A
516
515
515
516
GR.
GR.
GR.
GR.
300
20.7
20.7
20.7
20.7
400
21.3
21.3
21.3
21.3
400
200
A
A
A
A
671
671
672
672
CC65
C865
B65
C65
21.7
21.7
21.7
21.7
A
A
A
A
671
671
672
672
CC70
CB70
B70
C70
23.1
23.1
23.1
23.1
22.5
22.5
22.5
22.5
300
21.7
21.7
21.7
21.7
C
23.3
23.3
23.3
100
70
70
70
70
300
20
21
22
23.7
400
20
21
22
23.7
A106
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
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
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
API
API
API
API
5L
5L
5L
5L
X60
X65
X70
X80
25
25.7
27.3
30
25
25.7
27.3
30
25
25.7
27.3
30
25
25.7
27.3
30
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
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
538
566
593
1000
1050
1100
2.5
1.6
1
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
2.5
1.6
1
2.5 2.5
2.5
2.5
1.6
1.6
1.6
1
1
1
2.5
2.5
2.5
2.5
2.5
2.5
2.5
-
1000
1000
1050
1100
1050
1100
2.5 2.5
2.5
2.5
1000
1.6
1.6
1.6
1050
1100
1.6
1.6
1.6
1
1
1
1
1
1
Tabla factor E (Ta
E factor for a given material and welding
Seamless pipe
Electric resistance welded pipe
Electric fusion welded pip
A 106
A 134
A 135
A 139
A 179
A 333
A 334
A 369
A53
API5L
S
1
NA
NA
NA
1
1
1
1
1
1
1
2
Column:
3
ERW
NA
NA
0.85
NA
NA
NA
NA
NA
0.85
0.85
EFW
NA
0.8
NA
0.8
NA
NA
NA
NA
NA
0.95
3
4
Welding type
Quality factor for longitudinal weld joint
Seamless pipe
Elecric Resisitance Welded pipe
Electric FusionWelded pipe
Furnace Butt Welded pipe
Input
S
ERW
EFW
FBW
Welding type from sheet Wall thickness
Input:
IF(S24=S13,1,IF(AND(S24=S14),2,IF(AND(S24=S15),3,IF(AND(S24=S16,4)
Column =
Output
2
Material
Column
E-factor
A 106
3
NA
VLOOKUP(L34,'4.- Tabla A-1B'!K12:O21,'4.- Tabla A-1B'
Tabla factor E (Table A-1B)
material and welding type Welding type
welded pipe
ctric fusion welded pipe, double butt, straight or spiral seam
Furnace butt welded
FBW
NA
NA
NA
NA
NA
. K12:O21
NA
NA
NA
0.6
0.6
5
Column number
Output
1
2
3
4
Output + 1
2
3
4
5
ERW
5),3,IF(AND(S24=S16,4))))
3
2:O21,'4.- Tabla A-1B'!L23+1,FALSE)
Column
1
2
3
4
5
6
7
8
9
10
Coefficient Y ASME 304.1.1-304.2.1
For t < d/6
Table 304.1.1.
VBA function y_ferritic
t=
y=
y=
t <=
Y=
482
ºC
y_ferritic_t(I24)
#ADDIN?
-
482
0.4
ºC
-
t=
y=
y=
496
ºC
y_ferritic_t(I24)
#ADDIN?
-
t=
y=
y=
510
ºC
y_ferritic_t(I24)
#ADDIN?
-
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
Tabla 1
For
11.5
Table 2 gives a Height of Sharp V Thread
TD =
0.07531
TD =
1.91
Table 2.
NPS
Threads/in
1/16
27
1/8
27
1/4
18
3/8
18
1/2
14
3/4
14
1/1
11.5
5/4
11.5
3/2
11.5
2/1
11.5
5/2
8
3/1
8
7/2
8
4/1
8
5/1
8
in
Threads / in
Threads / in
in
mm
Table 1
Threads/in
27
18
14
11.5
8
H (mm)
0.814832
1.221994
1.571244
1.912874
2.74955
H (in)
0.03208
0.04811
0.06186
0.07531
0.10825
6/1
8/1
1 0/1
1 2/1
1 4/1
1 6/1
1 8/1
2 0/1
2 4/1
8
8
8
8
8
8
8
8
8
Height of Sharp V Thread
H=
0.07531
H=
1.91
Height of Sharp V Thread
in
mm
H=
H=
Table 1
Threads/in
27
18
14
11.5
8
0.10825
2.75
H (mm)
0.814832
1.221994
1.571244
1.912874
2.74955
in
mm
H (in)
0.03208
0.04811
0.06186
0.07531
0.10825
ASTM A106
Minimum wall thickness
ASTM A53
API 5L
Eq. (a)
ASTM A 106
ASTM A 53
API 5L
ASTM A106
1-0.875
0.125
12.5
%
Mill tolerance for A 106
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 and API 5L
Table 9.- Tolerances for Wall Thickness
Tolerance in percent of specified thickness
Mill tolerance
MT =
12.5
%
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
API RP14E
CORPORATE INCL. API RP14E
1.5mm CA
Min Sch
Min Thk
Min Sch
Min Thk
mm
mm
Sch 160
4.78
Sch 80 or XS
3.73
Sch 160
5.56
Sch 80 or XS
3.91
Sch 80
4.55
Sch 80 or XS
4.55
Sch 80
5.08
Sch 80 or XS
5.08
Sch 80
5.54
Sch 80 or XS
5.54
Sch 80
7.62
Sch 80 or XS
7.62
Sch 40 or STD
6.02
Sch 40 or STD
7.11
Sch 20
6.35
Sch 20
6.35
Sch 20
6.35
Sch 20
7.92
Sch 20
7.92
Sch 20
9.53
Sch 20 or STD
9.53
Sch 20 or STD
6.35
Sch 20 or STD
9.53
Sch 20 or XS
12.7
Sch 20 or XS
12.7
Sch 20 or XS
12.7
Sch 20 or XS
12.7
STAINLESS STEEL
CORPORATE
Min Sch
Sch 80S
Sch 80S
Sch 80S
Sch 80S
Sch 80S
Sch 40S
Sch 40S
Sch 10S
Sch 10S
Sch 10S
Sch 10S
Sch 10S
Sch 10S
Sch 10S
Sch 10S
Sch 10S
Sch 10S
Sch 10
Sch 10
Sch 10
Sch 10
Min Thk
mm
3.73
3.91
4.55
5.08
5.54
7.62
6.02
7.11
3.76
4.19
4.57
4.78
4.78
4.78
5.54
6.35
6.35
7.92
7.92
7.92
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
dext
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"
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
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 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
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
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"
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
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, temperatu
In general, the roof of a storage tank should be designed with a minimum 3 mm corrosion allowance
http://www.sulphuric-acid.com/techmanual/Storage/storagetanks.htm#Corrosion%20Allowance
2. Design pressure and temperature
at a figure
3" (1/16") is
the Code?"
ce life, acid concentration, temperature, geographic location and upon whether or not anodic protection or an internal protective
a minimum 3 mm corrosion allowance. The shell and tank bottom should have a minimum of 6 mm corrosion allowance.
ks.htm#Corrosion%20Allowance
dic protection or an internal protective coating is installed.
of 6 mm corrosion allowance.
1
Appendix M. Guide to classifying fluid services
http://www.engineeringtoolbox.com/astm-steel-pipes-pressure-temperature-40_742.html
ASTM A106, API 5L and ASTM A 53 Seamless carbon steel pipes. Pressure and Temperature Ratin
ASTM A106, API 5L and ASTM A53 Seamless Carbon Steel Pipes - Pressu
Pressure (kPa) and temperature (oC) ratings of ASTM A106, API 5L and ASTM A53 Sea
450ºC
Maximum allowable pressure and temperature ratings for petroleum refinery piping and chemical plant piping systems grade B w
Maximum Allowable Pressur
Nominal Size
(mm)
Wall
Thickness
(mm)
-67
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
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
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
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
Due to possible conversion of carbon to graphite (graphitization) - carbon steel pipes should b
used.
1)
1 Pa = 10-6 N/mm2 = 10-5 bar = 0.1020 kp/m2 = 1.02x10-4 m H2O = 9.869x10-6 atm = 1.45x1
T(oF) = [T(oC)](9/5) + 32
e-temperature-40_742.html
pes. Pressure and Temperature Ratings
Carbon Steel Pipes - Pressure and Temperature Ratings
A106, API 5L and ASTM A53 Seamless Carbon Steel Pipes at temperatures ranging from -29ºC to
ng and chemical plant piping systems grade B with plane ends to ANSI/ASME B31.3 Process Piping.
Maximum Allowable Pressure (kPa)
205
260
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
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
Temperature (oC)
350
370
Maximum Allowable Stress (kPa)
117,130
115,752
29,255
28,910
40,878
40,396
53,404
52,777
83,507
82,522
23,860
23,578
33,506
33,106
49,429
48,843
70,643
69,809
22,310
22,048
30,862
30,474
44,606
44,082
65,476
64,704
18,369
18,155
25,651
25,348
34,505
34,099
54,906
54,266
16,529
16,329
23,295
23,019
33,816
33,416
49,966
49,374
13,925
13,759
20,105
19,871
33,037
32,652
43,173
42,670
15,227
15,048
21,097
20,849
29,420
29,076
45,116
44,585
13,222
13,063
18,693
18,472
28,111
27,780
39,928
39,459
11,210
11,079
16,198
16,012
400
4301)
89,570
22,372
31,260
40,837
63,857
18,245
25,617
37,799
54,024
17,060
23,584
34,112
50,070
14,049
19,616
26,389
41,988
12,636
17,811
25,858
38,205
10,645
15,378
25,266
33,017
11,644
16,129
22,503
34,498
10,108
14,290
21,497
30,536
8,571
12,388
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
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
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
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
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
ation) - carbon steel pipes should be avoided for temperatures above 425 oC. Instead Alloy steel should be
m H2O = 9.869x10-6 atm = 1.45x10-4 psi (lbf/in2)
ASTM A106, API 5L, and ASTM A53 seamless CS pipes - Pressure and temperature
nging from -29ºC to
450
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
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
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
Alloy steel should be
t=
[
d ext −2⋅Cext
−1. 155⋅P
⋅ 1− Exp
2
σ allow
(
)]
c: the sum of the mechanical allowances ( thread or groove depth) plus corrosion a
ci: internal allowances
co: external allowances
For macined surfaces or groves whre the tolerance is not specified, the tolerance s
B31.3, K304 Pressure design of high pressure componentes
For threaded components, the nominal thread depth (dimension H of ASME B1.20
B31.3, K304 Pressure design of high pressure componentes
S pipes - Pressure and temperature ratings
ead or groove depth) plus corrosion and erosion allowances.
ance is not specified, the tolerance shall be assumed to be 0.5 mm in addition to thespecified depth of the cut
componentes
depth (dimension H of ASME B1.20.1 or equivalent) shall pply, except the following four cases.
componentes
ecified depth of the cut
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
Maximum Allowable non-shock Pressure (psig)
Temperature
( F)
o
Pressure Class (lb)
150
300
400
600
Hydrostatic Test Pressure (psig)
450
1125
1500
2225
-20 to 100
285
740
990
1480
200
260
675
900
1350
300
230
655
875
1315
400
200
635
845
1270
500
170
600
800
1200
600
140
550
730
1095
650
125
535
715
1075
700
110
535
710
1065
750
95
505
670
1010
800
80
410
550
825
850
65
270
355
535
900
50
170
230
345
950
35
105
140
205
1000
20
50
70
105
Maximum Allowable non-shock Pressure (bar g)
Temperature
( F)
o
Pressure Class (lb)
150
300
400
600
Hydrostatic Test Pressure (bar g)
31.0
77.6
103.4
153.4
-20 to 100
19.7
51.0
68.3
102.0
93
17.9
46.5
62.1
93.1
149
15.9
45.2
60.3
90.7
204
13.8
43.8
58.3
87.6
260
11.7
41.4
55.2
82.7
316
9.7
37.9
50.3
75.5
343
8.6
36.9
49.3
74.1
371
7.6
36.9
49.0
73.4
399
6.6
34.8
46.2
69.6
427
5.5
28.3
37.9
56.9
454
4.5
18.6
24.5
36.9
482
3.4
11.7
15.9
23.8
510
2.4
7.2
9.7
14.1
538
1.4
3.4
4.8
7.2
e flanges and flanged fittings
langes and flanged fittings according the American National Standard ANSI B16.5 - 1988.
ock Pressure (psig)
sure Class (lb)
900
1500
2500
3350
5575
9275
2220
3705
6170
2025
3375
5625
1970
3280
5470
1900
3170
5280
1795
2995
4990
1640
2735
4560
1610
2685
4475
1600
2665
4440
1510
2520
4200
1235
2060
3430
805
1340
2230
515
860
1430
310
515
860
155
260
430
900
1500
2500
231.0
384.4
639.5
153.1
255.5
425.4
139.6
232.7
387.8
135.8
226.1
377.1
131.0
218.6
364.0
123.8
206.5
344.0
113.1
188.6
314.4
111.0
185.1
308.5
c Test Pressure (psig)
ck Pressure (bar g)
sure Class (lb)
Test Pressure (bar g)
110.3
183.7
306.1
104.1
173.7
289.6
85.2
142.0
236.5
55.5
92.4
153.8
35.5
59.3
98.6
21.4
35.5
59.3
10.7
17.9
29.6
ANSI B16.5 - Maximum Pressure and Temp
Non-shock pressure
SI B16.5 - Maximum Pressure and Temperature Ratings
n-shock pressure (psig) and temperature ratings 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 tnom
shall be grater than the minimum wall
thickness t min
t nom> T̄ min
Eq . ( f )
Method from Process Piping [4]
treq = tBasic + OT
tm =
t + CA + TD
t=
0.0094 in
CA =
TD =
tm =
0.0625 in
0.07 in
d=
sch =
s=
0.14
in
2
80
###
in
in
Basic thickness
acc. ASME B31.3, Eq. (3a)
t Basic=
t=
P=
P⋅d ext
2⋅[ σ⋅E + P⋅Y ]
( 3 a)
P * dext / ( 2* (sallow * E + P* Y) )
1.03
MPa
d=
#ADDIN?
mm
sallow =
130.3
1
0.4
MPa
-
#ADDIN?
mm
E=
Y=
tBasic =
Over thickness
OT =
CA + TD
CA =
1.59
TD =
1.91
OT =
3.50
mm
mm
mm
Required thickness
treq =
tBasic + OT
tBasic =
OT =
treq =
#ADDIN?
3.50
mm
mm
#ADDIN?
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 )
Set of equations from ref [ 4 ]
t req
t min>
Eq .(e )
MT
- with its requirement
t nom> t min
Eq .( f )
1.- Data
Material: CS A53 pipe
dn =
NPS 2, threaded
Design pressure
Design temperature
P=
P=
temp =
2
150
1.03
500
in
psi
MPa
°F
Corrosion allowance
temp =
CA =
260
1/16
°C
in
Allowable stress
0.0625 in
CA =
sallow =
1.59
de =
Exterior diameter
Thread depth
(Eq. 3a)
eq
CA =
= tBasic + OT
mm
18,900 psi
TD =
2.375
0.07
in
in
TD =
1.78
mm
(For TD, Value from Table 1 will be used)
2.- Pipe exterior diameter
dn =
2
de =
#ADDIN?
in
mm
3. Allowed stress
For A 53 Gr. B_ (Table A-1, sheet 3)
sallow =
130.3
MPa
mm
0.24
Tmin =
tm / 0.875
1.59
1.78
tm =
0.14
0.875
in
3.6
3.60
Tmin =
0.16
in
4.12
mm
mm
Tmin =
0.16
#ADDIN?
#ADDIN?
in
in
4.12
###
mm
mm
s=
#ADDIN?
[4], (4.10)
mm
Minimum thickness
tmin =
treq / Tol
treq =
Tol =
tmin =
#ADDIN?
0.875
mm
#ADDIN?
mm
Selected pipe
mat:
dn =
SCH =
CS
2
80
in
Nominal pipe tickness
s=
Pipe_Imp_CS_Thickness_dn_sch
tnom =
#ADDIN?
mm
tnom > tmin
9.- Required thickness (treq)
ASME B31.3, #304.1.1, Ec. (2)
treq =
tBasic + OT
tBasic =
OT =
treq =
#ADDIN?
3.50
mm
mm
#ADDIN?
mm
(Sheet 1)
10.- Selected shedule (SCH) and resulting thickness
SCH =
dn =
s=
tnom =s =
80
(Note 8)
9
2
in
Pipe_Imp_CS_Thickness_dn_sch
#ADDIN?
mm
Procedure according Process Piping [4]
Procedure according ASTM A 106
11.-Mill tolerance (MT)
tmin =
treq /Tol
11.-Mill tolerance (MT)
tmin =
tnom * Tol
treq =
Tol =
tmin =
(Note 9)
#ADDIN? mm
0.875
-
Eq. (e)
tnom =
(Sheet 7)
#ADDIN? mm
12. Requirement
tnom >
tmin
tnom =
#ADDIN? mm
tmin =
#ADDIN? mm
#ADDIN?
Eq. (f)
#ADDIN?
0.875
Tol =
tmin =
#ADDIN?
12. Requirement
tmin >
tmin =
treq =
#ADDIN?
#ADDIN?
#ADDIN?
Although the set of equations applied by ref [4] and
by ASME standard are different, both are equivalent.
See
(Sheet 16. Mil tolerance)
treq
Return to sheet Wall thickness
4.- Longitudinal weld joint value "E"
(Seamless pipe)
Sheet 4
ASME B31.3, Table A-1B
Longitudinal weld joint
E=
1
8.- Over Thickness "OT"
OT =
CA + TD
CA=
TD =
OT =
Type S
1.59
1.91
3.50
9.- Required thickness (treq)
5.- Coefficient Y
ASME 304.1.1-304.2.1
Table 304.1.1.
ASME B31.3, #304.1.1, Ec. (2)
tm = treq =
tBasic + OT
Sheet 5
t <=
482
Y=
0.4
ºC
tBasic =
#ADDIN?
OT =
tm = treq =
3.50
#ADDIN?
6.- Basic thickness
10.- Minimum thickness tmin
acc. ASME B31.3, Eq. (3a)
t Basic =
tBasic =
P=
d=
sallow =
1.03
#ADDIN?
MPa
mm
130.3
1
MPa
-
0.4
#ADDIN?
Tabla 1
SCH =
=
in
#ADDIN?
ASME B1.20.1-1983
2
11.5
in
Threads / in
Sheet 6
For a number of threads
#ADDIN?
11.- Selected schedule
Sheet 6
For a nominal diameter
Table 2 gives
#ADDIN?
0.875
MT =
tmin =
mm
treq / MT
tm = treq =
P * dext / ( 2* (sallow * E + P* Y) )
7.- Tread Depth: TD
Table 2
( 3 a)
2⋅[ σ⋅E + P⋅Y ]
E=
Y=
tBasic =
tmin =
P⋅d ext
11.5
Table 2 gives a Height of Sharp V Thread
TD =
0.07531
in
TD =
1.91
mm
Threads / in
80
12.- Nominal thickness
s=
dn =
Pipe_Imp_CS_Thickness_dn
2
SCH =
tnom = s =
#ADDIN?
13. Requirement
tnom >
tmin
tnom =
5.54
tmin =
80
#ADDIN?
#ADDIN?
Note. This requirement is used in[4]. Is a vali
(see page 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 )
Set of equations ASTM A 106
t min=t nom⋅MT
Eq .(a )
- with its requirement
t min> t req
Eq .(b )
ing ASTM A 106
(Note 9)
Eq. (a)
mm
(Sheet 7)
mm
Eq. (b)
mm
mm
Carbon steel pipes
dn
in
1/ 2
3/ 4
1
3/ 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
n to sheet Wall thickness
1
mm
mm
mm
=
0.14 in
=
#ADDIN?
mm
mm
mm
in
[4], equation (4.10)
mm
=
in
#ADDIN?
_Imp_CS_Thickness_dn_sch
in
mm
=
#ADDIN?
Eq. (f)
mm
0.218
mm
#ADDIN?
ent is used in[4]. Is a valid method.
2
3
4
bon steel pipes
Sch
5
10
20
30
40
60
80
100
120
140
160
STD
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.-Te
Sheet:
CS flanges-Press & Temp ratings
Maximum temperature and pressure ratings of flanges conforming dimensions ASME B16.5 Pipe Flanges and Flanged Fitti
and materials specification to ASTM A-105 Specification for Carbon Steel Forgings for Piping Applications - te
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.-Te
Sheet:
Max. Allowable Pressures
Maximumm allowable pressures [Mpa], for seamless pipes, steels grade B: A53, A106 and d API 5L, for nomin
and schedule "Sch", acording "Ec 3a", ASME B31.3, temperatures from 38°C to 593°C. (E = 1 a
s _CS flanges Press.-Temp. ratings
e Flanges and Flanged Fittings -
r Piping Applications - temperature
s _CS flanges Press.-Temp. ratings
6 and d API 5L, for nominal diameter "d n"
°C to 593°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
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 tnom
shall be grater than the minimum wall
thickness t min
Reference ASTM A
This reference giv
to consider the mil
t min =t nom⋅MT
and the requireme
is that the minimu
shall be grater than
t min >
Eq . ( e )
MT
and the requirement to be acomplished
is that the nominal wall thickness tnom
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 req
t nom >
Eq .( g )
MT
t min =t nom⋅MT
and the requireme
is that the minimu
shall be grater than
thickness t req
t min > t req
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
t min=t nom⋅MT
- with the requi
t min> t req
ASTM A 53/ ASTM A 106
For the example in sheet "Wall thickness"
dn =
2
sch =
80
"
the nominal thickness is
tnom =
5.54
mm
For the example conditions, the required thickness is
treq =
3.74
mm
According A 53 and A 106, the minimum wall thickness is
(see sheet "7. MT"
tmin =
tnom * 0.875
tmin =
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 >
treq
Eq. (b)
In this case, the selecterd shedule is correct since
4.85
>
3.74
[5] ASTM A106
Eq. (a)
Applicatioin in
Sheet "Wall thickness"
Rated thickness
Thickness to be applied in the
the calculations, for a selected
Pipe dimensions
de =
dext =
di =
pipe (rated thickness).
di =
Rated thickness
trated =
[6]
tNom * 0.875 - tAllowances
Data of application example
Material:
SS
t=
tNom =
Basic thiskness acc. B31.3
t = P * dext
tBasic =
P=
2.0
MPa
dn =
300
mm
st,max =
34.5
Mpa
E=
1.0
-
W=
1.0
-
tcorr =
Y=
0.4
-
tthread =
Allowances considered
tallowances =
tallowances =
Allowances
tcorr =
1.59
mm
tthread =
0.0
mm
Rated thickness
trated =
Shedule initialy assumed
sch
80S
tNom =
-
tallowances =
trated =
between the use
ASTM A 53 /A 106
indicated in [4]
ASTM A 53
tmin >= 0.875 * tnom
Eq. (a)
tnom: nominal (average) wall thickness
tmin: minimum wall thickness
ASTM 106
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)
In page 2 it is shown that the set of equations (a) and (b) is equivalent to the set of equations (4.10) a
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 tmin is
t min=t nom⋅MT
Eq .(a )
Eq. (a)
Mill tolerance MT
According ASTM A 106 and ASTM A53,
the minimum wall thickness tmin 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 tmin shall be greater
than the calculated required thickness treq
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 )
ference ASTM A106
is reference gives following equation
consider the mill tolerance
Eq . (a)
in =t nom⋅MT
d the requirement to be acomplished
hat the minimum thickness tmin
all be grater than the required
Equating equation
t min=t nom⋅MT
Eq .(a )
with equation
t min> t req
Eq .(b )
one has
t nom⋅MT > t req
Eq .( c )
Dividing both sides of equation
Eq . (a)
d the requirement to be acomplished
hat the minimum thickness tmin
all be grater than the required
ckness t req
Eq .( b)
in > t req
in =t nom⋅MT
et of equations from ASTM A106
Eq .( a )
min =t nom⋅MT
with the requirement
Eq .(b )
min > t req
Sheet "14. Example"
t min> t req
Eq .(b )
one has
t nom⋅MT > t req
Eq .( c )
Dividing both sides of equation
by MT
t nom⋅MT t req
>
MT
MT
one obtains
t req
t nom>
Eq .( d )
MT
[4]
For the example in sheet "14. Example"
dn =
2
sch =
80
"
the nominal thickness is
tnom =
5.54
mm
For the example conditions, the required thickness is
treq =
3.74
mm
According [4], Eq. (4.10)
(see sheet "14. Example)
tmin =
treq / 0.875
tmin =
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
tnom >
tmin
In this case, the selecterd shedule is correct since
5.54
>
4.27
[4]
Process Piping
Charles Becht
ASME Press. New York 2002
Tmin = minimum wall thickness
tn = nominal wall thickness
Applicatioin in
Sheet "14. Example"
Pipe dimensions
Requisite
Pipe_SI_SS_Dext_dn
#ADDIN? mm
Pipe_SI_SS_Dint_dn_sch
trated >=
tBasic
trated =
#ADDIN? mm
tBasic =
#ADDIN?
mm
#ADDIN? mm
#ADDIN?
Pipe_SI_SS_Thickness_dn_sch
#ADDIN? mm
Thus, a SS pipe with a nominal
dn =
Basic thiskness acc. B31.3 (3a)
t = P * dext / ( 2* (st,max * E*W + P* Y) )
#ADDIN? mm
mm
and a shedule
sch =
80S
-
which has a nominal thickness
tNom =
Allowances considered
tcorr + tthread
300
#ADDIN?
mm
accomplish with ASME B31.3
requirements.
1.59
mm
0.0
mm
For strength calculations, the
1.59
mm
thickness to be used is
trated =
Rated thickness
tNom * 0.875 - tAllowances
#ADDIN?
1.59
mm
mm
#ADDIN? mm
#ADDIN? mm
Return to sheet Wall thickness
Reference [4]
tmin >= treq / 0.875
(4.10)
Minimum pipe thickness
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
The requirement to be acomplished
is that the nominal wall thickness tnom
shall be grater than the minimum wall
thickness t min
t nom> t min
Eq .( f )
tnom
>
tmin
Eq. (f)
t to the set of equations (4.10) and (f)
A53,
Eq .(a )
Dividing both sides of equation
t nom⋅MT > t req
Eq . ( c )
by MT, one obtains
t req
A53,
Eq .(a )
Dividing both sides of equation
t nom⋅MT > t req
Eq . ( c )
by MT, one obtains
t req
t nom>
Eq .( d )
MT
mm
ss mm
s application,
75 )
s that the
greater
s treq
Eq .(b )
(b )
kness
is
Eq . (c )
n
Eq .(a )
Eq .(b )
Eq .( c )
es of equation
According ASTM A 106 and ASTM A53,
t req
t nom>
Eq .(d )
MT
And according Ref 4,
t req
t >
Eq .( g )
Eq .(b )
Eq .( c )
es of equation
MT
And according Ref 4,
t req
t nom>
MT
Eq .( g )
thus both references have an equivalent
requirement, although the calculation
procedure is different.
Eq .( d )
[6]
Pipe components should be rated using
no more than 87.5 % of the nominal wall
thickness of listed pipes less allowances
applied for the pipe
trated =
tNom * 0.875 - Allowances
Note 1
Pipe basic allowable stress
at maximum temperature
Table A-1, ASME B31.3
t=
300
ºF
sallow =
16.7
ksi
sallow =
115.1
MPa
Maximum tension stress
st,max =
sallow * (sb/sallow)
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
1
2
M A53,
3
valent
tion
4
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