ASME Section VIII div 2 2010. ASME Boiler and Pressure Vessel Code. Alternative Rules
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2010 SECTION VIII, DIVISION 2
4-185
Table 4.11.1 – Design Of Closure Member Of Jacket To Shell
Detail Requirements Figure
5 Closure details (a), (b), and (c) shall only
be used when the requirements of
paragraph 4.11.3.3 are satisfied.
These closures may be used on any of
the types of jacketed vessels shown in
Figure 4.11.1. For Type 1 jacketed
vessels, the required minimum closure
bar thickness shall be determined from
the equations in Table 4.11.1, Detail 4.
For all other types of jacketed vessels, the
required minimum closure bar thickness
and the maximum allowable width of the
jacket space shall be determined from the
following equations:
1.414
js
rc
c
PR j
t
S
⎛⎞
=
⎜⎟
⎝⎠
()
2
2
2
s
j
cs
jj
tt
St
j
PR
+
=−
Weld sizes connecting the closure bar to
the inner vessel shall be as follows:
[
]
min 1.5 , 1.5
cs
Ytt≥
, and shall be
measured as the sum of dimensions
a
and
b as shown.
Z is equal to the minimum fillet size
necessary when used in conjunction with
a groove weld or another fillet weld to
maintain the minimum required Y
dimension.
t
c
(a)
R
s
a
b
Z
Z
Z
Z
Y = a + b
t
s
Y = a + b
R
s
t
s
a
b
Z
Z
Z
Z
t
c
a
b
t
s
Z
Z
Z
t
c
Z
Y = a + b
R
s
(b)
(c)
2010 SECTION VIII, DIVISION 2
4-186
Table 4.11.1 – Design Of Closure Member Of Jacket To Shell
Detail Requirements Figure
6 Closure details (a), (b), and (c) shall only
be used when the requirements of
paragraph 4.11.3.3 are satisfied.
The jacket to closure bar attachment
welds shown in Details (a), (b) and (c)
may be used on any of the types of
jacketed vessels shown in Figure 4.11.1.
Attachment welds shown in Details (d),
(e) and (f) may be used on any of the
types of jacketed vessels shown in Figure
4.11.1 where
rj
t
does not exceed 16 mm
(0.625 in.).
The required minimum closure bar
thickness and the maximum allowable
width of the jacket space shall be
determined from the following equations:
1.414
js
rc
c
PR j
t
S
⎛⎞
=
⎜⎟
⎝⎠
()
2
2
2
s
j
cs
jj
tt
St
j
PR
+
=−
(a)
See paragraph 4.2
t
c
t
j
min.
t
j
R
j
R
j
t
c
t
j
Backing Strip
May Be Used
45° min.
Backing Strip
May Be Used
R
j
t
c
2t
j
min.
See paragraph 4.2
t
j
R
j
t
c
t
j
min.
0.7 t
j
min.
Not
Less
Than a
a
t
j
t
c
1.5 t
j
(Elongated to
Maintain min.
Throat Dimension)
t
j
min.
R
j
0.83 t
j
min.
t
j
t
c
t
j
30° max.
t
j
min.
min. Throat
Dimension = t
j
R
j
(c)
(b)
(d)
(e)
(f)
See paragraph 4.2
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2010 SECTION VIII, DIVISION 2
4-187
Table 4.11.1 – Design Of Closure Member Of Jacket To Shell
Detail Requirements Figure
7 Closure details (a), (b), and (c) shall only
be used when the requirements of
paragraph 4.11.3.3 are satisfied.
These closures may be used on Type 3
jacketed vessels shown in Figure 4.11.1
shall have attachment welds in
accordance with Details (a), (b) or (c).
This construction is limited to jackets
where
rj
t does not exceed 16 mm (0.625
in.).
For torispherical, ellipsoidal, and
hemispherical heads, the outside
diameter of jacket head shall not be
greater than the outside diameter of the
vessel head, or the inside diameter of the
jacket head shall be nominally equal to
the outside diameter of vessel head.
See Welding Details(h-2) and (h-3)
Detail (h-1)
A
t
3
tj=16 mm (0.625 in) max
t
j
max.
Z = 0.83 t
j
min.
Y = 1.5 t
j
min.
B
A
t
3
Full
Penetration
Weld
tj=16 mm (0.625 in) max
B
A
t
3
(a) for A > B
Full
Penetration
Weld
t
j
=16 mm (0.625 in) max
B
(b) for A = B
(c) for A < B
8
Closures for conical or toriconical jackets
shall comply with the requirements for
Type 2 jacketed vessels shown in Figure
4.11.1.
See Details 5 and 6
Conical Shell
Toriconical Head
2010 SECTION VIII, DIVISION 2
4-188
Table 4.11.2 – Design Of Jacket Penetration Details
Detail Requirements Figure
1 This closure details shall only be used
when the requirements of paragraph
4.11.3.3 are satisfied.
The nozzle wall may be used as the
closure member where the jacket is
welded to the nozzle.
2min
j
at= and min
j
bt=
Vessel
Wall
Jacket
Wall
t
s
t
j
b
t
Nozzle
Neck
a
Nozzle
C
L
Backing
Strip May
Be Used
2 This closure details shall only be used
when the requirements of paragraph
4.11.3.3 are satisfied.
The minimum required thickness,
rc
t , for
the geometries shall be calculated as a
shell under external pressure in
accordance with paragraph 4.4.
2min
j
at=
and
min
j
bt=
Attachment A shall be made using details
in Table 4.2.6.
t
s
t
n
t
c
a
t
n
t
j
Attachment A
Backing
Strip May
Be Used
R
p
Nozzle
C
L
3 This closure details shall only be used
when the requirements of paragraph
4.11.3.3 are satisfied.
The minimum required thickness,
rc
t ,
shall be equal to
rj
t .
Attachment A shall be made using details
in Table 4.2.6.
Attachment A
t
s
t
n
t
c
r
r = 3 t
j
min.
t
n
t
j
Backing Strip
May Be Used
Nozzle
C
L
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2010 SECTION VIII, DIVISION 2
4-189
Table 4.11.2 – Design Of Jacket Penetration Details
Detail Requirements Figure
4
This closure details shall only be used
when the requirements of paragraph
4.11.3.3 are satisfied.
The minimum required thickness,
rc
t ,
shall be calculated as a shell under
external pressure in accordance with
paragraph 4.4.
Attachment A shall be made using details
in Table 4.2.6.
5 This closure details shall only be used
when the requirements of paragraph
4.11.3.3 are satisfied.
The thickness required of the closure
member attached to the inner vessel,
1rc
t ,
shall be calculated as a shell under
external pressure in accordance with
paragraph 4.4. The required thickness of
the flexible member,
2rc
t , shall be
determined as follows:
When a tubular section does not exist
between jacket and torus:
2
-0.6
rc
cj
Pr
t
SE P
=
When a tubular section does exist
between jacket and torus:
2
0.6
jp
rc
cj
PR
t
SE P
=
−
2
j
at=
,
j
bt=
, and
1
1.25
c
ct=
Attachment A shall be made using details
in Table 4.2.6.
t
s
t
j
t
n
R
p
Attachment A
b
Backing Strip
May Be Used
t
c1
c
a
t
c2
r
Nozzle
C
L
(a)
t
s
t
j
t
n
R
p
Attachment A
t
c1
c
t
c2
b
a
Nozzle
C
L
(b)
2010 SECTION VIII, DIVISION 2
4-190
Table 4.11.2 – Design Of Jacket Penetration Details
Detail Requirements Figure
6 This closure detail shall only be used
when the requirements of paragraph
4.11.3.3 are satisfied.
The minimum thickness,
rc
t , shall be
calculated as a shell of radius
p
R
under
external pressure in accordance with
paragraph 4.4.
2
j
at=
and
j
bt=
Attachment A shall be made using details
in Table 4.2.6.
t
s
t
n
b
t
c
t
j
Attachment A
R
p
a
Nozzle
C
L
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2010 SECTION VIII, DIVISION 2
4-191
Table 4.11.3 – Coefficients For Equation (4.11.5)
pj
D
Coefficients
Shell Thickness
5 mm (3/16 in.) 6 mm (1/4 in.) 10 mm (3/8 in.) 13 mm (1/2 in.)
DN50
NPS 2
1
C
-3.6674510E+01 -1.8874043E+04 4.0083779E+02 -2.6447784E+02
2
C
1.2306994E+01 1.7869518E+04 -5.7029108E+02 1.8066952E+02
3
C
3.5701684E+00 -7.2846419E+03 3.1989698E+02 -4.9294965E+01
4
C
-7.9516583E-01 1.6723763E+03 -9.4286208E+01 7.1522422E+00
5
C
5.8791041E-02 -2.3648930E+02 1.6391764E+01 -5.7900069E-01
6
C
-1.5365397E-03 2.1101742E+01 -1.7431218E+00 2.4758486E-02
7
C
0.0000000E+00 -1.1608890E+00 1.1160179E-01 -4.3667599E-04
8
C
0.0000000E+00 3.6022711E-02 -3.9549592E-03 0.0000000E+00
9
C
0.0000000E+00 -4.8303253E-04 5.9644209E-05 0.0000000E+00
10
C
0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00
DN80
NPS 3
1
C
-3.7588705E+03 -1.2551406E+04 -3.8104460E+04 -1.4263782E+04
2
C
2.9919870E+03 1.2149900E+04 4.0491537E+04 1.6228077E+04
3
C
-9.4177823E+02 -5.0657776E+03 -1.8844078E+04 -8.0227888E+03
4
C
1.5278500E+02 1.1910361E+03 5.0415301E+03 2.2676555E+03
5
C
-1.3452359E+01 -1.7255075E+02 -8.5435371E+02 -4.0440980E+02
6
C
6.1167422E-01 1.5770136E+01 9.5115501E+01 4.7257835E+01
7
C
-1.1235632E-02 -8.8782173E-01 -6.9588768E+00 -3.6233229E+00
8
C
-2.1465752E-06 2.8148933E-02 3.2277515E-01 1.7597455E-01
9
C
0.0000000E+00 -3.8488963E-04 -8.6172557E-03 -4.9179021E-03
10
C
0.0000000E+00 0.0000000E+00 1.0094910E-04 6.0315412E-05
DN100
NPS 4
1
C
-2.1336346E+04 7.3995872E+03 8.3115447E+02 -4.0097574E+02
2
C
1.5982068E+04 -6.7592710E+03 -7.6253222E+02 4.2602525E+02
3
C
-4.9936486E+03 2.6131811E+03 2.9500674E+02 -1.7446665E+02
4
C
8.4914220E+02 -5.4873257E+02 -6.1135935E+01 3.7753845E+01
5
C
-8.4931392E+01 6.7571708E+01 7.4233181E+00 -4.6748939E+00
6
C
5.0044853E+00 -4.8769663E+00 -5.2938127E-01 3.3376011E-01
7
C
-1.6105634E-01 1.9112909E-01 2.0558271E-02 -1.2795569E-02
8
C
2.1857714E-03 -3.1412698E-03 -3.3593696E-04 2.0405896E-04
9
C
0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00
10
C
0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00
2010 SECTION VIII, DIVISION 2
4-192
Table 4.11.3 – Coefficients For Equation (4.11.5)
pj
D
Coefficients
Shell Thickness
19 mm (3/4 in.) 25 mm (1 in.) 50 mm (2 in.) ---
DN50
NPS 2
1
C
-4.0085121E+02 3.6782666E+00 1.0000000E+00
---
2
C
3.5652906E+02 -1.2669560E+00 0.0000000E+00
---
3
C
-1.3171601E+02 4.5491492E-01 0.0000000E+00
---
4
C
2.6480374E+01 -6.2883969E-02 0.0000000E+00
---
5
C
-3.1258388E+00 3.9401350E-03 0.0000000E+00
---
6
C
2.1680455E-01 -9.3433360E-05 0.0000000E+00
---
7
C
-8.1908188E-03 0.0000000E+00 0.0000000E+00
---
8
C
1.3019970E-04 0.0000000E+00 0.0000000E+00
---
9
C
0.0000000E+00 0.0000000E+00 0.0000000E+00
---
10
C
0.0000000E+00 0.0000000E+00 0.0000000E+00
---
DN80
NPS 3
1
C
-1.5045135E+03 8.1206324E+00 -3.2789303E+03
---
2
C
1.4487653E+03 -8.3943593E+00 3.4419302E+03
---
3
C
-5.9846696E+02 3.7870074E+00 -1.5852932E+03
---
4
C
1.3910417E+02 -7.0886182E-01 4.2063167E+02
---
5
C
-1.9888205E+01 6.6972430E-02 -7.0855807E+01
---
6
C
1.7922925E+00 -3.1488859E-03 7.8593168E+00
---
7
C
-9.9521276E-02 5.8511141E-05 -5.7415834E-01
---
8
C
3.1164737E-03 0.0000000E+00 2.6647325E-02
---
9
C
-4.2181627E-05 0.0000000E+00 -7.1319265E-04
---
10
C
0.0000000E+00 0.0000000E+00 8.3899940E-06
---
DN100
NPS 4
1
C
-3.5172282E+00 -2.5016604E+02 -5.3121462E+00
---
2
C
4.3499616E+00 1.7178270E+02 3.4090615E+00
---
3
C
-2.7157682E-01 -4.6844914E+01 -5.5605535E-01
---
4
C
1.1186450E-02 6.6874346E+00 4.2156128E-02
---
5
C
-7.1328067E-04 -5.2507555E-01 -1.2921987E-03
---
6
C
2.2962890E-05 2.1526948E-02 6.6740230E-06
---
7
C
0.0000000E+00 -3.6091550E-04 0.0000000E+00
---
8
C
0.0000000E+00 0.0000000E+00 0.0000000E+00
---
9
C
0.0000000E+00 0.0000000E+00 0.0000000E+00
---
10
C
0.0000000E+00 0.0000000E+00 0.0000000E+00
---
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2010 SECTION VIII, DIVISION 2
4-193
4.11.9 Figures
L
Type 1
L
Type 2
Type 3
L
Type 4
L
Type 5
L
Figure 4.11.1 – Types of Jacketed Vessels
2010 SECTION VIII, DIVISION 2
4-194
Continuous
Partial Jacket
Multiple or
Pod Type Jacket
Figure 4.11.2 – Types of Partial Jackets
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