pembuatan tabel sacp

7/25/2019 Pembuatan Tabel SACP

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The following underground structures and above ground structure are protected by SACP

system

Magnesium Anode ChemicalComposition

Element Content (%

Alumunium (Al !"#$"& ma'

inc (n )"!$#"! ma'

Manganese (Mn *"+!$*"&* ma'

Silicon (Si *"#* ma'

Copper (Cu *"**! ma'

,ron (-e *"*# ma'

.ic/el (.i *"**# ma'

0thers *"#* ma'

Magnesium (Mg 1alance

.o23escriptio

n

4ocatio

n

0utside4ength Coating Type

Pipe

0perating

3iameter Temperature

Closed 3rain (3C5T356P 7 Amine 3rain (A3 Pipes

+ Pipe 89: ;5< 92!: =! m

PE 6rapping

Tape#* C

) Pipe 8#: ;5< #2!5> +** m

PE 6rapping

Tape#* C

# Pipe 8): ;5< )2#&!: #9! m

PE 6rapping

Tape#* C

Magnesium Anode Characteristic

Anode Characteristic 0nshore Pipe

3esian 4ife Time (years )!

0pen Circuit Potential (volt ?$+"!

vs Cu5CuS*9 in soil5fresh water

Closed Circuit Potential (volt ??$+"9

vs Cu5CuS*9 in soil5fresh water

3riving @oltage (volt *"!

Anode Current Capacity (A$r5/g ? +"+

3esign ;tiliBation -actor(% *"=

Anode Shape Prepac/aged

Anode 3imension

4ength (mm )*width (mm *

eight (mm !

4ength with bac/fill (mm &!*

3iameter with 1ac/fill (mm +!*


2/10

3ES,


3/10

ProtectiveCurrentFeGuirement

The current reGuirement for protecting the obHect iscalculated as follow

,p A ' Cd ' (+I S-

CdECd#*I Cd#*' (Tp$#* ' i5+*

,p Protectivecurrent reGuirement

A Area to be protected

Cd#* 1are Steel Current density at #*JC

i ,ncrementof 1are Steel Current density at temperature

Tp Average Temperature of Pipes

Cd 1areSteel Current density at TpJCS-Ecalculationsafetyfactor

.o2 Protected Stucture

ProtectedCurrent

3ensity

Calculation

SafetyPipe 0pr2

FeGuired Prot2

Area

(m) (A5m) -actor (%

Temp2

(>C

Current

(Ampere

Closed 3rain

(3C5T356P

7 Amine 3rain

(A3 Pipes

+ Pipe 89: +!"!# *"* +* #* +"*)!

) Pipe 8#: +"9 *"* +* #* *"*)

# Pipe 8): #")& *"* +* #* *")+


4/10

6eightof Anode

The weight of anode is calculated based on total reGuiredprotectivecurrent" design life time" anode currentcapacity" and utiliBation factor as

per followingformulaD

,' 4 ' =&*

6$

u'C

.o

2Protected Stucture

FeGuireProt2

3sn2

4ife

Time

;tiliBation AnodeCurrent

FeGuired

Anode

Current

(Ampere

(Kears -actor

Capacity

(Amp$

r5/g

.et 6eight

(/gs

Closed 3rain

(3C5T356P

7 Amine 3rain (A3

Pipes

+ Pipe 89: +"*)! )! *"= ++** )!!"*

) Pipe 8#: *"*) )! *"= ++** ))"9# Pipe 8): *")+ )! *"= ++** !#"&

6here 6 reGuired anode net weight

, reGuired protectivecurrent

4 E anode design lifetime

=&* E conversion factor for year to hour

u E anode utiliBationfactor

C E anode currentcapacity


5/10

.o2 Protected StuctureFeGuire Anode

,ndividual Anode

.et

Calculated

.umber of

.et weight (/gs 6eight (/gs Anode (pcs

Closed 3rain

(3C5T356P

7 Amine 3rain (A3

Pipes

+ Pipe 89: )!!"* &"& #9

) Pipe 8#: ))"9 &"& #

# Pipe 8): !#"& &"& &


6/10

No. Protected Stucture

ProtectedLength

DeisgnNumber of

AnodeSpacing

(m) Anode (pcs) (m)

Closed Drain(DC/TD/P)

No.

Protected Stucture

!e"uireProt.

CalculatedNumber of

Anode (pcs)

DesignNumber of

Current(Ampere)

Current

#ethod

eightmethod

Anode (pcs)

Closed Drain(DC/TD/P)

$ Amine Drain (AD)Pipes

% Pipe &' %*+, - ' '+ Pipe & **-+ %

Pipe &+ *+% + 0 0

Total ''


7/10

$ Amine Drain (AD)

Pipes

% Pipe &' 1, ' 2+,

+ Pipe & %** 2

Pipe &+ ', 0 2,*

.o2 Parameter

symbo

l -ormula ;nit@alue

@alue @

A

3esign

Parameter

+

3esign 4ife

Time K $$$)! )!


8/10

)

) CP Criteria

(vs CSE Ep $$$ @olt$*"=! $*"=! $*

#

Average Soil

Fesistivity p $$$$ ohm2cm+*** +*** +

9

Soil

Corrosivity $$$$ $$$$

E'trimely

Corrosive

E'trimely

Corrosive

E'tr

Cor

!

1are Steel

Current

3ensity i $$$$

amps5m

)

*"* *"* *

Calculation

Allowance

-actor S- $$$$

+*% +*% +

1

Pipe 7

Coating 3ata

+

;5< Pipe

3escription

Pipe d9: '

=!m

Pipe d#:

' +**m

Pipe

' #

)

Pipe 0utside

3iameter 03 m*"++9#

*"*== *"

#

;5< Pipe

Protected

4ength 4p m

=!

+** #

9

Pipe Coating

type

6rapping

tape

6rapping

tape

6ra

t

!

Loint Pipe

Coating Type

6rapping

tape

6rapping

tape

6ra

t

EstimateCoating

1rea/down C1 %

!

!

&

Portected

Surface Area A

A N od N 4p '

C1 m)+!"!#

+"9 #

C Anode 3ata

+ Material $$$$$

Magnesium

Sp

Magnesium

Sp

Mag

)

.atural

potensial (vs

CSE En @olts

$+"! $+"! $

#

Anode 3riving

@oltage Ea @olts*"! *"! *

9

Current

Capacity C A$r5Og++** ++** +

!

Consumption

Fate Cr =&*5C Og5A$yr &" &" &

3esign

;tilisation

-actor ;

*"= *"=

&;nit .et6eight 6a Ogs

&"& &"&


9/10

=

Pac/age

Anode 4enght 4a cm&! &!

Pac/age

Anode

3iameter 3a cm

+! +!

3

Anode

Calculation

+ 1K 6E,


10/10

pembuatan tabel sacp

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