subsea cameras, lights & lasers subsea...

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 A

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E N G I N E E R I N G & D E V E L O P M E N T

Retrofi t Anode Systems

ImencoImenco is a major EPC-contractor to the maritime industry. We design, develop, and manufacture a wide range of systems and products such as Diving Systems, Helicopter Refuelling Systems, Ex Cameras, Lifting and Handling products, Subsea Cameras and Subsea Tools including Subsea Lights and Lasers. Our customers benefi t from over thirty years’ experience in the industry, adding value and providing smart solutions.

A 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 1 2

A 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 Retrofi t Anode Systems since 1999, which have proved to be very eff ective and installation friendly.

The smart solution carter for compact design, enabling great fl exibility in anode attachments.

The main advantages off ered by the Piranha™ and Humboldt™ anode clamps are the ease of operation and the reduced vessel time during installation.

IntroductionContentsINTRODUCTION 03

CATHODIC PROTECTION SYSTEMS 04

PIRANHA™ PLATE CLAMP 05

HUMBOLDT™ RADIAL BOLT CLAMP 06

HUMBOLDT™ AXIAL BOLT CLAMP 07

GENERAL FEATURES FOR ALL CLAMPS 08

TORQUE TOOL 09

ANODE AND CLAMP CONFIGURATION 10

TYPICAL ANODE INSTALLATION 11

ImencoImenco is a major EPC-contractor to the maritime industry. We design, develop, and manufacture a wide range of systems and products such as Diving Systems, Helicopter Refuelling Systems, Ex Cameras, Lifting and Handling products, Subsea Cameras and Subsea Tools including Subsea Lights and Lasers. Our customers benefi t from over thirty years’ experience in the industry, adding value and providing smart solutions.

For further information regarding the content of this brochure, contact:

Kjell Ole Pedersen [email protected] +47 957 01 008

A 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 P6

Cathodic Protection SystemsM 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 sacrifi ced 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 off ers 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.

A 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

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This drawing must not be copied or the contents thereofimparted to a third party without Imenco`s written permission.

NANAGen. Welding Tol.NS-EN ISO 13920U.S.O.

NAGen. machined surface roughnessU.S.O.

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SMART SOLUTIONS

Piranha S Clamp mål

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Piranha™ Plate ClampT 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 fl exible design Imenco can easily make custom built solutions.

Clamp type

Plate thickness

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.


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Humboldt™ Radial Bolt ClampT 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 fi tted with a “monkey fi st” or similar arrangement for easy handling by the ROV.

Clamp type

Bolt diameter (mm)


A B C øD øE F G H

Humboldt™ Radial 19 - 22 (3 ⁄4" - 7⁄8") 72 20 118 80 25.4 38 46 8

Humboldt™ Radial 40 - 45 (19 ⁄13” - 13 ⁄16”) 72 20 128 80 46 48 46 8



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Humboldt™ Axial Bolt ClampT 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 fi tted with a “monkey fi st” or similar arrangement for easy handling by the ROV.

Clamp type

Bolt diameter (mm)


A B C øD øE F G H

Humboldt™ Axial 19 - 22 (3 ⁄4" - 7⁄8") 72 20 96 115 22.2 70 46 10



General features for all ClampsE 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 ToolF 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 fi xed 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 Confi gurationsA 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 Basket G 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 Sleds G 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 off ers 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 off ered as standard in a box profi le with shackle lifting points.

Orbital Bracket G 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, Imenco’s standard Orbital bracket surrounding the clamp unit is an eff ective solution for operational needs. Installation and protection are covered in one go.


Fig.3.1 Installation of Anode Clamp on riser fl ange stiff ener plate using torque tool

Fig.3.2 Anode Clamp installed

Typical Anode InstallationB 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.

3 Check the tool’s 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 fi tted to the anode clamp bracket.

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

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

8 Caution: Ensure that the fi ngers on the tool end fully engage between the clamp fi ngers.

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 straight off the clamp nut. Verify that the installation is correct by inspecting the clamp grip on the stiff ener plate edge. Fig. 3.2.

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

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

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