asme b31.8 riser calc

8/19/2019 ASME B31.8 Riser Calc

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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



1 1



ASME B31.8 Minimum Allowable Wall Thickness Calculation (0$e&ating Con Page

!lant "D Plant



E#ui$ment T$e' Riser (Gas)


!i$ing Classi)cation


!i$e Scheule' 4# $"


0$e&ating Conitions1440 sig


!*"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&centage 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!


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


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



1 1

maining

in

in

4



ASME B31.8 Design !&essu&e Calculation

('A>P =ase n a-tual minimum -rre thi-8ness)

!lant "D' Plant



E#ui$ment T$e' Riser (Gas)Date' 19th August, 2014

!i$ing Classi)cation'


!i$e Scheule' 4# $"


Design Conitions'


!*"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


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


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



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


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



Page1 2

e R:



Page2 2

059+

r t =e 0%50 r risers

!i$e



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



Page 1 1

r t =e 0%50 r risers



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%+



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



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








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



"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



:'"

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)]



"'", ('Pa)

*241

*345

*414

*43

*552

*241

*345

*414

*43

*552

*241

*345

*414

*43

*552

ther

n%

E ele-tri-

laser

asme b31.8 riser calc

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