Imenco Subsea Retrofit Anode Cathodic Protection Systems Al Cohen


2/12A L L I N F O R M A T I O N I S C O R R E C T A T T I M E O F G O I N G T O P R E S S : 1 1 / 2 0 12


3/12A V I A T I O N | D I V I N G | E N G I N E E R I N G & D E V E L O P M E N T | L I F T I N G & H A N D L I N G | S U B S E A | W O R K S H O P 5

Imenco has produced

ROV installable Retrofit

Ano e Systems since1999, w ic ave prove

to e very e ective an

installation friendly.

T e smart so ution carter

for compact design,

enabling great flexibility

in ano e attac ments.

The main advantages

o ere y t e Piran a

an Hum o t ano eclamps are the ease

of operation and the

reduced vessel time

uring insta ation.

IntroductionContentsINTRODUCTION 3

HUMBOLDT RADIAL BOLT CLAMP 06

HUMBOLDT AXIAL BOLT CLAMP 7

GENERAL FEATURES FOR ALL CLAMPS 08

TORQUE TOOL 09

ImencoImenco is a major EPC-contractor to the maritimeindustry. We design,

develop, and manufacturea wide range of systemsand products such asDiving Systems, HelicopterRefuelling Systems,Ex Cameras, Lifting andHandling products, SubseaCameras and Subsea Toolsincluding Subsea Lightsand Lasers. Our customersbenefit from over thirtyyears experience in theindustry, adding value andproviding smart solutions.

For further informationregarding the contentof this brochure, contact:

Kjell Ole [email protected]+47 957 01 008


4/12A V I A T I O N | D I V I N G | E N G I N E E R I N G & D E V E L O P M E N T | L I F T I N G & H A N D L I N G | S U B S E A | W O R K S H O P

Cathodic Protection Systems

M E T A L T H A T H A S B E E N E X T R A C T E D F R O M I T S P R I M A R Y O R E ( M E T A L O X I D E S A N D O T H E R F R E E R A D I C A L S )

H A S A N A T U R A L T E N D E N C Y T O R E V E R T T O T H A T S T A T E U N D E R T H E A C T I O N O F O X Y G E N A N D W A T E R .

The principle of Cathodic Protection (CP) is connection of a metal to be sacrificed by

turning the base metal into an Cathode and allowing the attached anode to deplete.

Imenco appreciates the complexity of subsea operations and the ever changing requirements.

As Cathodic protection solutions need to adapt to project requirements, Imenco offers special

anode package solutions that meet the strict project needs combined with the ease of use that has

come to be associated with Imenco Smart Solutions. Through client issued design requirements

or through a solution development partnership, Imenco will ensure focus for operational success.



I

G

A

B

C

DE

F

7

Piranha Plate Clamp

T H E P I R A N H A R A N G E I S I N T E N D E D F O R P L A T E M O U N T I N G U S E . O P E R A T E D W I T H T W O S T A N D A R D

R A N G E S 1 0 3 5 M M A N D 3 5 5 4 M M , T H E S E R A N G E S W I L L C A T E R F O R M O S T R E Q U I R E M E N T S .

The anode clamps will be installed by using the Imenco Torque Tool.

Due to the flexible design Imenco can easily make custom built solutions.

Clamptype

Platethickness

Clamp dimensions (mm)

A B C D E F G

Piranha (S) 10 - 35 75 20 125 115 37 46

Jaw 10 - 15

Jaw 15 - 20

Jaw 20 - 25

Jaw 25 - 30

Jaw 30 - 35

Piranha (M) 35 - 54 74 20 126 130 29 46

Jaw 35 - 40

Jaw 40 - 45

Jaw 45 - 50

Jaw 50 - 55

*Bespoke anode clamps can be made for special projects.



G

A

B

C

E

F

D

H

Humboldt Radial Bolt Clamp

T H E H U M B O L D T R A N G E I S M A D E F O R E A S Y I N S T A L L A T I O N O N T O B O L T S O R R O D S , A S A R A D I A L M O U N T .

T H I S D E S I G N I S B A S E D O N T H E P R I N C I P L E O F T O R Q U I N G T H E C L A M P T O A D E Q U A T E T E N S I O N .

The anode clamp provides easy handling and mating up with the ROV manipulator arm. The torque

tool can be fitted with a monkey fist or similar arrangement for easy handling by the ROV.

Clamptype

Boltdiameter (mm)


A B C D E F G H

Humboldt Radial 19 - 22 (34" - 78") 72 20 118 80 25.4 38 46 8

Humboldt Radial 40 - 45 (1913 - 1316) 72 20 128 80 46 48 46 8




G

A

B

C

D

H

E

F

Humboldt Axial Bolt Clamp

T H E H U M B O L D T R A N G E I S M A D E F O R E A S Y I N S T A L L A T I O N O N T O B O L T S O R R O D S , A S A N A X I A L M O U N T .

T H I S D E S I G N I S B A S E D O N T H E S A M E P R I N C I P L E O F T O R Q U I N G T H E C L A M P T O A D E Q U A T E T E N S I O N .

The anode clamp provides easy handling and mating up with the ROV manipulator arm. The torque

tool can be fitted with a monkey fist or similar arrangement for easy handling by the ROV.

Clamptype

Boltdiameter (mm)


A B C D E F G H

Humboldt Axial 19 - 22 (34" - 78") 72 20 96 115 22.2 70 46 10




General features for all Clamps

E A S Y T O I N S T A L L A N D F L E X I B L E C L A M P A R R A N G E M E N T

Fastening by expanding bolt in:

Clamping on rod or bolt

Clamping on plate edges Standardized torque tool and interface

Provides excellent mechanical attachment

Provides excellent electrical contact / bonding

Can be removed by use of extraction tool

Alternative application:

Mounting of plates to existing constructions

Mechanical reinforcement to structures

Fixation of lift pads to existing structures Attachment in concrete structures



Torque Tool

F O R E A S Y I N S T A L L A T I O N O F I M E N C O ' S C A T H O D I C P R O T E C T I O N

S Y S T E M S A P U R P O S E - B U I L T T O R Q U E T O O L H A S B E E N D E V E L O P E D .

The tool interfaces with the anode clamp by using a bayonet front-end to ensure the anode clamp

is kept in position while the expansion bolt is being torqued up and the anode is fixed into its position.

The torque tool can also be used to remove the anode.

Technical data (Torque tool):

Operating hydraulic pressure: 0 200 bar

Variable torque from: 100Nm

Max torque @ 200 bar is: 2000Nm

Weight in air: 35kg

Weight in water: 30kg

Standard equipped with ROV Fish tail handle



Anode and Clamp Configurations

A N O D E B A N K S C A N B E C O N F I G U R E D T O S U I T A N Y O P E R A T I O N A L R E Q U I R E M E N T I N C L U D I N G S I Z E ,

L O C A T I O N A N D A T T A C H M E N T M E T H O D . S U B S E A P R O T E C T I O N T O P R O J E C T R E Q U I R E M E N T .

Anode BasketG E N E R A L D I M E N S I O N S : 3 5 0 X 3 5 0 X 2 2 8 | 5 2 0 X 5 2 0 X 2 7 0

A N O D E M A S S : 5 K G | 5 - 1 5 K G

Standard Imenco anode baskets include the desired anode mass

as well as a separate clamp port for transportation and optimal

operational functionality. Wire length will be adapted to suit

project requirements. Larger units in this style can be produced

to suit larger applications.

Anode SledsG E N E R A L D I M E N S I O N S : 2 7 9 2 X 2 7 9 2 X 2 5 6 2

A N O D E M A S S : 4 5 0 K G

For large protection applications, the Anode sled offers long life

as well as a stable sea bed located solution. These units can be

used as standalone sled units or connected together in series.

Sled frames can be adapted to suit operational needs and

placement restrictions. The unit is offered as standard in a

box profile with shackle lifting points.

Orbital BracketG E N E R A L D I M E N S I O N S : 3 9 4 X 4 0 3 X 2 0 0

A N O D E M A S S : 3 X 5 K G

Where quick installation without the need for cabling in the

area is desired, Imencos standard Orbital bracket surrounding

the clamp unit is an effective solution for operational

needs. Installation and protection are covered in one go.



Fig.3.1 Installation of Anode Clamp onriser flange stiffener plate using torque tool

Fig.3.2 Anode Clamp installed

Typical Anode Installation

B E L O W I S A N A B B R E V I A T E D D E S C R I P T I O N O F H O W T O O P E R A T E T H E A N O D E R E P L A C E M E N T T O O L .

It is assumed that the ROV has conducted a General Visual Inspection (GVI) prior to commencement

of the anode installation sequence and that all parts of the selected Anode Clamp grip positions have

been cleared for debris or marine growth.

It is recommended that the actual plate thickness is checked as part of the ROV pre-survey. If necessary,

the plate grip jaws can be replaced, see separate procedure given in section 5. For torque tool operation

details, see section 4. Reference is also made to the separate torque tool instruction manual. The

following procedure describes the preparation work (Task 1-6) and the typical installation sequence.

Task Description

1 Install the Torque Tool on the ROV.

2 Adjust torque to correct value.

3Check the tools holding capacity by lifting the anode clamp(while eg: located in its parking holder.)

4 Place the anode clamps in ROV tool basket with the torque tool.

5 A securing line should be fitted to the anode clamp bracket.

6 Deploy the ROV and locate the Anode Clamp on installation site.

7Ensure that the securing line(s) is connected between theanode clamps and ROV frame.

8Caution: Ensure that the fingers on the tool end fully engagebetween the clamp fingers.

9 Lift the torque tool with the Anode Clamp attached.

10 Verify the clamp jaw to be fully engaged onto the plate edge. Fig. 3.1.

11 Apply pressure to operate the torque tool CW.

12 Keep the torque tool stable and verify the rotation.

13Remove the torque tool from the Anode Clamp by pulling it straightoff the clamp nut. Verify that the installation is correct by inspectingthe clamp grip on the stiffener plate edge. Fig. 3.2.

14Remove or cut any security line from the ROV frame and theAnode Bracket.


12/12

B R O C H U R E S F R O M I M E N C O

A V I A T I O N F U E L L I N G S Y S T E M S

B L O C K S & S H E A V E S

R E T R O F I T A N O D E S Y S T E M S

R O V L A T C H E S

R O V L I F T I N G H O O K S & L O A D T R A N S F E R H O O K S

R O V S H A C K L E S

S E A L E D L I G H T S

S U B S E A C A M E R A S , L I G H T S & L A S E R S

S U B S E A G U I D I N G S Y S T E M S

HQ Haugesund, Norway+47 52 86 41 [email protected]

Aberdeen, Scotland+44 (0)1224 [email protected]

Houston, North America+1 (713) 480 [email protected] I M E N C O . C O M

583WWW.KONVOIHAUGESU

ND.NO

DATEOFPRINT:11/2012

Imenco Subsea Retrofit Anode Cathodic Protection Systems Al Cohen

Documents

Transcript of Imenco Subsea Retrofit Anode Cathodic Protection Systems Al Cohen