comparision of pressure vessel codes
TRANSCRIPT
Co
mp
ari
so
n o
f p
res
su
re v
es
se
l c
od
es
Wh
y d
o th
e c
od
es d
iffe
r a
nd
Ho
w d
o th
ey d
iffe
r
Pre
sente
d b
y:
Ray D
ela
forc
e
3/2
4/2
011
By R
ay D
ela
forc
e
03
/24/1
1
By R
ay D
ela
forc
e
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
es
e a
re t
he
co
de
s w
e a
re g
oin
g t
o c
om
pa
re:
•A
SM
E S
ecti
on
V
III, D
ivis
ion
1
•A
SM
E S
ecti
on
V
III, D
ivis
ion
2
•P
D 5
500
•E
N 1
3445 P
art
3
Bu
t fi
rst
we
lo
ok
at
the
mo
st
fun
da
me
nta
l re
qu
ire
me
nt
Wh
at
is t
he A
LL
OW
AB
LE
ST
RE
SS
?
Th
is is t
he p
rim
ar y
str
ess w
e m
ust
no
t exceed
y
A P
RIM
AR
Y s
tre
ss
re
su
lts
fro
m in
tern
al
pre
ss
ure
Th
ere
are
SE
CO
ND
AR
Y s
tre
ss
es
–w
e d
o n
ot
dis
cu
ss
th
em
3/2
4/2
011
By R
ay D
ela
forc
e
03
/24/1
1
By R
ay D
ela
forc
e2
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
We
fir
st
loo
k a
t a c
ou
ple
of
imp
ort
an
t m
ate
rial p
rop
ert
ies
Let
us lo
ok a
t th
e S
tress-S
train
dia
gra
m –
we g
et
a lo
t o
f in
form
ati
on
El
ti
Co
llap
se c
an
occu
r w
hen
we r
each
th
e y
ield
po
int
Le
t u
s l
oo
k a
t th
e i
mp
ort
an
t fe
atu
res
of
ou
r s
tee
l
Ela
sti
c
Ra
ng
eP
lasti
c R
an
ge
Fra
ctu
re
Du
cti
leR
an
ge
ess !
Yie
ld P
oin
t
Du
cti
le R
an
ge
All
bl
St
bt
h
Stre
Allo
wab
le S
tresses a
bo
ut
here
3S
train
"0.2
% s
train
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Let
us lo
ok a
t th
e S
tress-S
train
dia
gra
m –
we g
et
a lo
t o
f in
form
ati
on
Co
nsid
er
ste
el:
U
TS
= 7
0 0
00 p
si (4
82 M
Pa)
Yie
ld 3
8000 p
si (2
62 M
Pa)
Co
llap
se c
an
occu
r w
hen
we r
each
th
e y
ield
po
int
Le
t u
s l
oo
k a
t th
e i
mp
ort
an
t fe
atu
res
of
ou
r s
tee
l
Th
ere
are
th
ree im
po
rtan
t fe
atu
res w
e m
ust
co
nsid
er
1.
Th
ere
is t
he l
imit
of
pro
po
rtio
nality
Y
ield
Po
int
0.2
% s
train
2.
Th
e U
ltim
ate
Te
nsile S
tren
gth
(U
TS
) W
hen
fra
ctu
re o
ccu
rs
3.
Th
e D
ucti
lity
=
Yie
ld / U
TS
M
ust
be less t
han
1.0
Th
ere
is a
4th
on
e –
Cre
ep
wh
ich
occu
rs a
t h
igh
er
tem
pera
ture
s
4
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Allo
wab
le s
tress
is b
as
e o
n t
he
se
ch
ara
cte
ris
tic
s o
f th
e m
eta
l
AS
ME
Secti
on
VIII
Div
isio
n 1
AS
ME
Secti
on
VIII
Div
isio
n2
S =
sm
aller
of:
U
TS
/ 3
.5 o
r Y
ield
/ 1
.5
= 2
0 0
00 p
si
(138 M
Pa)
AS
ME
Secti
on
VIII
Div
isio
n 2
EN
13
44
5
Sm
= s
maller
of:
U
TS
/ 2
.4
o
r
Yie
ld / 1
.5
Bo
thb
ased
on
PE
DE
uro
pean
req
uir
em
en
ts
= 2
5 3
00 p
si
(174 M
Pa)
EN
13
44
5
f =
sm
all
er
of:
U
TS
/ 2
.4 o
r Y
ield
/ 1
.5
Bo
th b
as
ed
on
PE
D E
uro
pean
re
qu
ire
me
nts
= 2
5 3
00 p
si
(174 M
Pa)
PD
5500
f =
sm
all
er
of:
U
TS
/ 2
.35
or
Y
ield
/ 1
.5
= 2
5 3
00 p
si
(174 M
Pa)
5W
e c
on
sid
er
Carb
on
Ste
el fo
r sim
plicit
y
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
We
lo
ok a
t th
is o
n t
he S
tress S
train
dia
gra
m
AS
ME
VIII, D
ivis
ion
1 h
as a
larg
er
safe
ty m
arg
in –
safe
r
Th
is c
od
e is s
till t
he f
avo
ure
d c
od
e t
hro
ug
ho
ut
the W
orl
d
ess !
Yie
ld P
oin
t
AS
ME
VIIID
ii
i1
AS
ME
VIII D
ivis
ion
2, E
N 1
3445 &
PD
5500
Stre
AS
ME
VIII D
ivis
ion
1
Str
ain
"6
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Let
us n
ow
lo
ok a
t a t
yp
ical
calc
ula
tio
n –
the c
ylin
dri
cal
sh
ell
Here
are
th
e b
asic
dim
en
sio
ns
We
sh
all i
gn
ore
jo
int
eff
icie
ncy E
(z)
Wd
thl
lti
fth
lid
P=
300 p
si
(207 M
Pa)
D=
60 i
ns (
1 5
24 m
m)
We n
ow
do
th
e c
alc
ula
tio
n f
or
the
cy
lin
de
r:
t =
0.4
54
in
(11
.53
4 m
m)
By A
SM
E V
III
Div
isio
n 1
S(f
)=
20 0
00 p
si
(174 M
Pa)
By A
SM
E V
III
Div
isio
n 2 t=
0.4
53
in(1
1.5
16
mm
)t
0.4
53
in
(11
.51
6 m
m)
By E
N 1
3445
DO
Di
7tA
SM
Ee
EN
13445 &
PD
5500
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Let
us n
ow
lo
ok a
t a t
yp
ical
calc
ula
tio
n –
the c
ylin
dri
cal
sh
ell
Here
are
th
e b
asic
dim
en
sio
ns
We
sh
all i
gn
ore
jo
int
eff
icie
ncy E
Wd
thl
lti
fth
lid
Let
us n
ow
lo
ok a
t a t
yp
ical
calc
ula
tio
n –
the E
llip
tical
Head
P=
300 p
si
(207 M
Pa)
D=
60 i
ns (
1 5
24 m
m)
We n
ow
do
th
e c
alc
ula
tio
n f
or
the
cy
lin
de
r:
t =
0.4
54
in
(11
.53
4 m
m)
By A
SM
E V
III
Div
isio
n 1
S(f
)=
20 0
00 p
si
(174 M
Pa)
By A
SM
E V
III
Div
isio
n 2 t=
0.4
53
in(1
1.5
16
mm
)t
0.4
53
in
(11
.51
6 m
m)
By E
N 1
3445
t0
45
3i
(11
51
6)
Th
at
is w
hy t
he d
iffe
ren
ces
are
so
sm
all –
the f
orm
ula
e
are
nearl
y t
he s
am
e !
t =
0.4
53
in
(11
.51
6 m
m)
By P
D 5
500
t=
04
53
in(1
15
16
mm
)
Th
is f
orm
ula
lo
oks o
dd
,
bu
t is
actu
ally j
ust
ab
ou
t
8
t =
0.4
53
in
(11
.51
6 m
m)
the s
am
e a
s t
he o
thers
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Let
us n
ow
lo
ok a
t a t
yp
ical
calc
ula
tio
n –
the c
ylin
dri
cal
sh
ell
Here
are
th
e b
asic
dim
en
sio
ns
We
sh
all i
gn
ore
jo
int
eff
icie
ncy E
Wd
thl
lti
fth
lid
Let
us n
ow
lo
ok a
t a t
yp
ical
calc
ula
tio
n –
the E
llip
tical
Head
We n
ow
do
th
e c
alc
ula
tio
n f
or
the
cy
lin
de
r:
t =
0.4
54
in
(11
.53
4 m
m)
By A
SM
E V
III
Div
isio
n 1
Cylin
der
based
on
the
By A
SM
E V
III
Div
isio
n 2 t=
0.4
53
in(1
1.5
16
mm
)
Cylin
der
based
on
th
e
eq
uilib
riu
m e
qu
ati
on
t 0
.45
3 in
(11
.51
6 m
m)
By E
N 1
3445
t0
45
3i
(11
51
6)
Th
at
is w
hy t
he d
iffe
ren
ces
are
so
sm
all –
the f
orm
ula
e
are
nearl
y t
he s
am
e !
t =
0.4
53
in
(11
.51
6 m
m)
By P
D 5
500
t=
04
53
in(1
15
16
mm
)
Th
is f
orm
ula
lo
oks o
dd
,
bu
t is
actu
ally j
ust
ab
ou
t
9
t =
0.4
53
in
(11
.51
6 m
m)
the s
am
e a
s t
he o
thers
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Let
us n
ow
lo
ok a
t a t
yp
ical
calc
ula
tio
n –
the E
llip
tical
Head
Min
or
Sh
ap
e is b
ased
on
tru
e e
llip
se
Majo
r
hD
/2h
= 2
P=
300 p
si
(207 M
Pa)
D60
i(1
524
)
DA
SM
E D
ivis
ion
1 –
sim
ple
calc
ula
tio
nA
SM
E D
ivis
ion
2 –
co
mp
licate
d c
alc
.
D=
60 i
ns (
1 5
24 m
m)
S(f
)=
20 0
00 p
si
(138 M
Pa)
t =
0.4
51
in
t
= 1
1.4
47
mm
Head
form
ula
alm
ost
iden
tical
toth
ecylin
der
form
ula
:H
ea
d f
orm
ula
alm
os
t id
en
tical to
th
e c
ylin
der
form
ula
:
Ellip
tical
head
: C
ylin
der:
10
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Let
us n
ow
lo
ok a
t a t
yp
ical
calc
ula
tio
n –
the E
llip
tical
Head
Min
or
Sh
ap
e is b
ased
on
tru
e e
llip
se
Majo
r
hD
/2h
= 2
P=
300 p
si
(207 M
Pa)
D60
i(1
524
)
DA
SM
E D
ivis
ion
2 –
co
mp
licate
d c
alc
.
1 T
here
are
man
y s
tep
s t
o d
o
D=
60 i
ns (
1 5
24 m
m)
S(f
)=
25 3
00 p
si
(174 M
Pa)
2 C
an
no
t c
alc
ula
te t
dir
ectl
y .
.
.o
nly
P
Div
isio
n2
allo
ws
hig
her
str
ess
On
th
e n
ext
slid
e w
e s
ho
w t
he c
alc
ula
tio
n p
er
PV
Eli
te
Div
isio
n 2
allo
ws
hig
her
str
es
s
11
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
is i
s t
he c
alc
ula
tio
n u
sin
g P
V E
lite
-A
SM
E D
ivis
ion
2
Th
e E
llip
tical
head
is t
ran
sfo
rmed
in
eq
uiv
ale
nt
To
risp
heri
cal
Head
12
Cro
wn
rad
ius
Kn
uckle
rad
ius
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
is i
s t
he c
alc
ula
tio
n u
sin
g P
V E
lite
-A
SM
E D
ivis
ion
2
Next
we m
ust
calc
ula
te s
om
e g
eo
metr
y f
acto
rs
13
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
is i
s t
he c
alc
ula
tio
n u
sin
g P
V E
lite
-A
SM
E D
ivis
ion
2
Even
mo
re g
eo
metr
y a
nd
oth
er
facto
rs…
……
Even
mo
re g
eo
metr
y a
nd
oth
er
facto
rs a
nd
mo
re –
lots
of
facto
rs
14
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
is i
s t
he c
alc
ula
tio
n u
sin
g P
V E
lite
-A
SM
E D
ivis
ion
2
Even
mo
re g
eo
metr
y a
nd
oth
er
facto
rs a
nd
mo
re –
lots
of
facto
rs
Fin
ally
we
en
du
pw
ith
ou
rsta
rtin
gp
ressu
re
15
PV
Elite
do
es a
n i
tera
tive c
alc
ula
tio
n t
o e
nd
up
wit
h t
he p
ressu
re
Fin
ally w
e e
nd
up
wit
h o
ur
sta
rtin
g p
ressu
re
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
is i
s t
he c
alc
ula
tio
n u
sin
g P
V E
lite
-A
SM
E D
ivis
ion
2
We
had
to
sta
rt t
he c
alc
ula
te w
ith
a ‘g
uess’ th
ickn
ess t
An
d w
e e
nd
ed
up
wit
h o
ur
sta
rtin
g p
ressu
re
We
have t
o u
se a
co
mp
ute
r to
do
th
is c
alc
ula
tio
n !
Th
e c
om
pu
ted
th
ickn
ess is t
= 0
.32
19
in
t
= 8
.17
67
mm
16
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
is i
s t
he c
alc
ula
tio
n u
sin
g P
V E
lite
-A
SM
E D
ivis
ion
2
EN
13445 h
as a
sim
ilar
meth
od
–s
lig
htl
y l
ess c
om
plicate
d t
han
AS
ME
Th
e f
inal co
mp
ute
d t
hic
kn
ess is:
t
= 0
.3886 in
t
= 9
.8619 m
m
17
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
e m
eth
od
of
co
mp
uti
ng
th
e h
ead
by P
D 5
500 is v
ery
dif
fere
nt
Min
or
1 C
alc
ula
te
h /
D =
0.2
5
Majo
r
h2 C
alc
ula
te
P /
f =
0.1
19
P=
300 p
si
(207 M
Pa)
D60
i(1
524
)
D
D=
60 i
ns (
1 5
24 m
m)
f=
25 3
00 p
si
(174 M
Pa)
PD
5500 u
ses a
gra
ph
ical so
luti
on
s –
like t
his
18
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Here
is t
he G
rap
h u
sed
to
co
mp
ute
th
is h
ead
th
ickn
ess
1 C
alc
ula
te
h /
D =
0.2
5
2 C
alc
ula
te
P /
f =
0.1
19
e / D
e =
D x
(e
/D)
19
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Th
is i
s t
he c
alc
ula
tio
n u
sin
g P
V E
lite
t =
0.3
792 in
t
= 9
.6317 m
m
Each
co
de h
as i
ts o
wn
way o
f co
mp
uti
ng
a h
ead
–a
nd
oth
er
part
s
Bu
t, w
here
do
co
des ‘b
orr
ow
’ p
roced
ure
s f
rom
oth
er
co
des ?
20
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Co
de
s ‘C
op
y’ c
od
es
–s
om
e e
xa
mp
les
Fla
ng
e a
naly
sis
AS
ME
Div
isio
n 1
AS
ME
Div
isio
n 2
EN
13445-3
PD
5500
21
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Co
de
s ‘C
op
y’ c
od
es
–s
om
e e
xa
mp
les
Ac
ce
ss
op
en
ing
s i
n s
kir
t
AD
Me
rbla
tte
r (A
D 2
00
0)
EN
13445-3
22
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
Co
de
s ‘C
op
y’ c
od
es
–s
om
e e
xa
mp
les
Pre
ss
ure
–A
rea
me
tho
d
PD
55
00
PD
55
00
AS
ME
Div
isio
n 1
AS
ME
Div
isio
n 2
EN
13445-3
Eh
fth
dh
dif
id
thth
di
il
23
Ea
ch
of
the
co
de
s h
as
mo
dif
ied
th
e m
eth
od
–sam
e p
rin
cip
le
CO
MP
AR
ISO
N o
f th
e v
ari
ou
s p
ressu
re v
essel co
des
We
have lo
oked
at
vari
ou
s c
od
es o
f co
nstr
ucti
on
We
have learn
ed
so
me im
po
rtan
t is
su
es
1.
AS
ME
VIII D
ivis
ion
1 r
eq
uir
es t
hic
ker
meta
l –
hig
h
sa
fety
fa
cto
r
2T
hth
dd
id
thi
tl
bt
2.
Th
e o
the
r c
od
es
we
dis
cu
ss
ed
use t
hin
ne
r m
eta
l, b
ut
the a
llo
wab
le s
tresses a
re n
eare
r th
e y
ield
po
int
–le
ss
sa
fety
3S
di
thd
hb
‘bd
’3
.S
om
e p
roc
ed
ure
in
th
e c
od
es
ha
ve
be
en
‘b
orr
ow
ed
’
fro
m o
ther
co
des
4.
AS
ME
VIII
Div
isio
n 2
an
d E
N 1
3445 a
re b
ased
on
th
e
PE
D(E
uro
pean
Pre
ssu
reE
qu
ipm
en
tD
irecti
ve)
PE
D (
Eu
rop
ean
Pre
ss
ure
Eq
uip
men
t D
ire
cti
ve
)
24
It i
s h
op
ed
yo
u g
ot
so
me v
alu
e o
ut
of
this
web
inar