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ASME B31.8 Minimum Allowable Wall Thickness Calculation (Design Coniti Page
!lant "D Plant
E#ui$ment %umbe&' 1234
E#ui$ment %ame' Name
E#ui$ment T$e' Riser (Gas)
Date' 19th August, 2014
!i$ing Classi)cation
!i$ing S$ec * +&ae'C4 API 5L Grae ! "mls
!i$e Scheule' 4# $"
%ominal Thickness' 0%33& in
Design Conitions'
Design Coe' A"' !%31%
!*"D Dwg' 5*00+%0+5%PI%10*0159
Reeren-e. A"' !31%*2012, 41%1%1 (a)
/here
35000 si
4%5 in
0%5
1
1
1415 si
,.18-in 4%+ mm
/here
0%12 in
0%05 in,.-3-in 5%9 mm
1415 sig, *20 t 150
!&essu&e esign wall thickness (t
D nminal utsie iameter ie, in-hes
E lngituinal int a-tr
F esign a-tr (0%5 r gas riser)
P esign ressure, sig
S se-i6e minimum 7iel strength, si
T temerature erating a-trt ressure esign /all thi-8ness, in-hes
S
D
F
E
T
P
t /
Minimum allowable wall thickness (t n
t n ressure esign /all thi-8ness A, in-hes
A -rrsin all/an-e
t
A t n /
t n = t + A
P = 2StD
FET t =PD
2SFET
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ASME B31.8 Minimum Allowable Wall Thickness Calculation (0$e&ating Con Page
!lant "D Plant
E#ui$ment %umbe&' 1234
E#ui$ment %ame' Name
E#ui$ment T$e' Riser (Gas)
Date' 19th August, 2014
!i$ing Classi)cation
!i$ing S$ec * +&ae'C4 API 5L Grae ! "mls
!i$e Scheule' 4# $"
%ominal Thickness' 0%33& in
0$e&ating Conitions1440 sig
Design Coe' A"' !%31%
!*"D Dwg' 5*00+%0+5%PI%10*0159
Reeren-e. A"' !31%*2012, 41%1%1 (a)
/here
35000 si
4%5 in
0%5
1
1
1440 si
,.18in 4%& mm
/here
!e¢age wall thickness &e
0%15 in :*nminal 0%33&
0%05 in :*a-tual. 0%115
,.-3in +%0 mm ; :*Remaining. 32
!&essu&e esign wall thickness (t o& MA0!
D nminal utsie iameter ie, in-hes
E lngituinal int a-tr
F esign a-tr (0%5 r gas riser)
Po ma<imum all/a=le erating ressure ('A>P), sig
S se-i6e minimum 7iel strength, si
T temerature erating a-tr
t ressure esign /all thi-8ness, in-hes
S
D
F
E
T
Po
t /
Minimum allowable wall thickness (t n o& MA0!
t n ressure esign /all thi-8ness A, in-hes
A -rrsin all/an-e
t
A t n /
t n = t + A
Po =2StD
FET t =PoD
2SFET
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1 1
maining
in
in
4
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ASME B31.8 Design !&essu&e Calculation
('A>P =ase n a-tual minimum -rre thi-8ness)
!lant "D' Plant
E#ui$ment %umbe&' 1234
E#ui$ment %ame' Name
E#ui$ment T$e' Riser (Gas)Date' 19th August, 2014
!i$ing Classi)cation'
!i$ing S$ec * +&ae'C4 API 5L Grae ! "mls
!i$e Scheule' 4# $"
%ominal Thickness' 0%33& in
Design Conitions'
Design Coe' A"' !%31%
!*"D Dwg' 5*00+%0+5%PI%10*0159
Calculation o& o5sho&e $lato&m gas &ise& MA0!
Reeren-e. A"' !31%*2012, 41%1%1 (a)
"teel Pie ?esign rmula.
/here
35000 sig
0%115 in A-tual -rre /all thi-8ness as etermine =7 r6l
4%5 in
0%5
11
862$sig MA0!
1415 sig, *20 t 150
D nminal utsie iameter ie, in-hes
E lngituinal int a-tr =taine rm :a=le 41%1%&*1
F esign a-tr =taine rm :a=le 41%1%+*1 (0%5 r gas riser)
P esign ressure, sig
S se-i6e minimum 7iel strength, si
T temerature erating a-tr =taine rm :a=le 41%1%*1
t nminal /all thi-8ness, in-hes
Cal-ulatin r esign ressure (Pi)
S
t
D
F
E T
P /
P = 2St D FET
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ASME B31.8 Design !&essu&e Calculation
('A>P =ase n a-tual minimum -rre thi-8ness)
!lant "D' 'eren PP
E#ui$ment %umbe&' 4*'R1*PP*'R*+5*1*G*059+*IRE#ui$ment %ame' 4# In-ming Riser rm Gas Pieline, 4*'R*+5*1*'R1*PP*G*
E#ui$ment T$e' Riser
Date' 19th August, 2014
ASME B31.87-,1- Table 821.1.971 Basic Design :acto& :
Location Class Design Factor, F
L-atin Class 1, ?i@isin 1 0%
L-atin Class 1, ?i@isin 2 0%&2
L-atin Class 2 0%+
L-atin Class 3 0%5
L-atin Class 4 0%4
Nte r risers.
?esign a-trs an :est Pressures in the " Regulatins. 49 CR 192 reBuires the a-
ASME B31.87-,1- Table 821.1.871 Tem$e&atu&e De&ating :acto& T o& Steel
Temperature, °F (°C)
250 (121) r l/er 1
300 (149) 0%9+&
350 (1&&) 0%933
400 (204) 0%9
450 (232) 0%+&
GNRAL N>:. r intermeiate temeratures, interlate r erating a-tr
Re. "u=sea Pielines an Risers,ite =7 ng !ai, Diang !ai, 2005
TemperatureDerating Factor, T
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e R:
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059+
r t =e 0%50 r risers
!i$e
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Location Class Design Factor, F
L-atin Class 1, ?i@isin 1 0%
L-atin Class 1, ?i@isin 2 0%&2
L-atin Class 2 0%+
L-atin Class 3 0%5
L-atin Class 4 0%4
Nte r risers.
?esign a-trs an :est Pressures in the " Regulatins. 49 CR 192 reBuires the a-t
ASME B31.87-,1- Table 821.1.971 Basic Design :acto& F
Re. "u=sea Pielines an Risers,ite =7 ng !ai, Diang !ai, 2005
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Page 1 1
r t =e 0%50 r risers
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ASME B31.87-,1- Table 821.1.;71 <ongituinal =oint :acto& E
Spec !o Pipe Class E Factor
A":' A53 "eamless 1
le-tri-*Resistan-e*Eele 1
urna-e*!utt Eele, Cntinuus Eel 0%+
A":' A10+ "eamless 1
A":' A134 le-tri-*usin Ar-*Eele 0%
A":' A135 le-tri-*Resistan-e*Eele 1
A":' A139 le-tri-*usin Ar-*Eele 0%
A":' A333 "eamless 1
le-tri-*Resistan-e*Eele 1%00 1
A":' A31 "u=merge*Ar-*Eele 1
A":' A+&1 le-tri-*usin*Eele
Classes 13, 23, 33, 43, 53 0%
Classes 12, 22, 32, 42, 52 1
A":' A+&2 le-tri-*usin*Eele
Classes 13, 23, 33, 43, 53 0%
Classes 12, 22, 32, 42, 52 1
A":' A+91 le-tri-*usin*Eele
Classes 13, 23, 33, 43, 53 0%
Classes 12, 22, 32, 42, 52 1
A":' A94 le-tri-*Resistan-e*Eele 1
A":' A1005 ?u=le "u=merge*Ar-*Eele 1
A":' A100+ Laser !eam Eele 1
API 5L le-tri- Eele 1
"eamless 1%00 1
"u=merge*Ar- Eele (Lngituinal 1
"eam r Feli-al "eam)
urna-e*!utt Eele, Cntinuus Eel 0%+0 0%+
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ASME B31.87-,1- Table 821.1.871 Tem$e&atu&e De&ating :acto& T o& Steel !i$e
Temperature Derating
Temperature, °F (°C) Factor, T
250 (121) r l/er 1
300 (149) 0%9+&
350 (1&&) 0%933400 (204) 0%9
450 (232) 0%+&
GNRAL N>:. r intermeiate temeratures, interlate r erating a-tra-tr
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ASME B31.87-,1- MA%DAT0>? A!!E%D"@ D
"PCII? 'INI'' IL? ":RNG:F >R ":L PIP C>''>NL "? IN PIPING "
:a=le ?*1 "e-i6e 'inimum iel "trength r "teel Pie Cmmnl7 se in Piing "
"e-% N% Grae :7e Nte (1)H "'", si
25000
30000
35000
42000
4+000
52000
5+000
+0000
+5000
&0000
0000
25000
30000
35000
30000
35000
40000
30000
35000
30000
35000
42000
4+000
52000
1 30000
3 35000
4 35000
+ 35000
& 35000
&5000
9 4+000
35000
42000
4+000
4000
50000
52000
5+000
+0000
+5000
API 5L [Note (2)] A25 BW, ERW, S
API 5L [Note (2)] A ERW, S, DSA
API 5L [Note (2)] B ERW, S, DSA
API 5L [Note (2)] x42 ERW, S, DSA
API 5L [Note (2)] x46 ERW, S, DSA
API 5L [Note (2)] x52 ERW, S, DSA
API 5L [Note (2)] x56 ERW, S, DSA
API 5L [Note (2)] x60 ERW, S, DSA
API 5L [Note (2)] x65 ERW, S, DSA
API 5L [Note (2)] x70 ERW, S, DSA
API 5L [Note (2)] x80 ERW, S, DSA
ASTM A53 Tye ! BW
ASTM A53 A ERW, S
ASTM A53 B ERW, S
ASTM A"06 A S
ASTM A"06 B S
ASTM A"06 # S
ASTM A"34 $ $ $ E!W [Note (3)]
ASTM A"35 A ERW
ASTM A"35 B ERW
ASTM A"3% A E!W
ASTM A"3% B E!W
ASTM A"3% # E!W
ASTM A"3% D E!W
ASTM A"3% E E!W
ASTM A333 S, ERW
ASTM A333 S, ERW
ASTM A333 S
ASTM A333 S, ERW
ASTM A333 S, ERW
ASTM A333 S, ERW
ASTM A333 S, ERW
ASTM A38" #&' *35 DSA
ASTM A38" #&' *42 DSA
ASTM A38" #&' *46 DSA
ASTM A38" #&' *48 DSA
ASTM A38" #&' *50 DSA
ASTM A38" #&' *52 DSA
ASTM A38" #&' *56 DSA
ASTM A38" #&' *60 DSA
ASTM A38" #&' *65 DSA
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"e-% N% Grae :7e Nte (1)H "'", si
35 35000
50 50000
+0 +0000
&0 &0000
0 0000
35 35000
50 50000
+0 +0000
&0 &0000
0 0000
35 35000
50 50000
+0 +0000
&0 &0000
0 0000
GNRAL N>:. :his ta=le is nt -mlete% r the minimum se-i6e 7iel strength
graes an graes in ther ar@e se-i6-atins, reer t the arti-ular se-i6-ati
N>:".
(1) A==re@iatins. !E urna-e =utt/ele ?"A u=le su=merge*ar- /ele
usin /ele RE ele-tri- resistan-e /ele E Jash /ele " seamless L
/ele%
(2) Intermeiate graes are a@aila=le in API 5L%
(3) "ee ali-a=le late se-i6-atin r "'"%
ASTM A%84 ERW
ASTM A%84 ERW
ASTM A%84 ERW
ASTM A%84 ERW
ASTM A%84 ERW
ASTM A"005 DSA
ASTM A"005 DSA
ASTM A"005 DSA
ASTM A"005 DSA
ASTM A"005 DSA
ASTM A"006 LW
ASTM A"006 LW
ASTM A"006 LW
ASTM A"006 LW
ASTM A"006 LW
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:'"
stems
"'", ('Pa)
*1&2
*20&
*241
*290
*31&
*359
*3+
*414
*44
*43
*552
*1&2
*20&
*241
*20&
*241
*2&+
*20&
*241
*20&
*241
*290
*31&
*359
*20&
*241
*241
*241
*241
*51&
*31&
*241
*291
*31&
*331
*345
*359
*3+
*414
*44
[Note (3)]
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"'", ('Pa)
*241
*345
*414
*43
*552
*241
*345
*414
*43
*552
*241
*345
*414
*43
*552
ther
n%
E ele-tri-
laser