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Platform Inspection Report

ROV Platform Inspection Survey Field Name Field

---------------------------------

For

END CLIENT

PLATFORM NAME

Inspection Period: Month YYYY

Document No.: XXX-RP-OP-XXX

ROV Platform Inspection - YYYY Page: 1 XXX-RP-OP-XXX

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Document Prepared by MCS Free Zone (MCS)

Prepared by XXXXXX

Company MCS Free Zone

Address Building 39 R, 6th Block

Zahraa El Maadi,

Cairo, Egypt

Tel +20 2 25218563

Fax +20 2 25218570

Web Address www.mcsoil.com

Document Issued by Contractor Company Name

Issued by XXXXXXX

Company

Address

Tel

Fax

Email

Web Address

Document Issued to End Client Name

Issued to XXXXXXXXX

Company

Address End Client Address

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Contractor

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http://www.mcsoil.com/


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Quality Control

MCS Report No.

XXXX-XXXX-RP-XX-XX-XXX

Revision No.

Description Issue Date

Prepared By

Reviewed By

Approved By

R0 Draft – Issued to client for approval

dd/mm/yy XXXXXX XXXXXX XXXXXX

Service Warranty

The data presented within the report and associated charts/drawings have been acquired and processed to meet the requirements of the contract as agreed by End Client and Contractor. Any unauthorised use of the information presented within this report and charts/drawings is prohibited. Contractor will not accept any liability if the data is used for purposes other than those agreed in the contract. The information presented in this report and associated drawings are based on the interpretation of the external visual inspection and will not provide accurate details of any features which are not entirely and/or clearly visible.


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Table of Contents

Page

1. INTRODUCTION 9 1.1. Definitions 9 1.2. Project Scope of Work 9 1.2.1. Pipeline Survey 9 1.2.2. Platform Inspection 9 1.2.3. Optional Work 10

2. PLATFORM NAME PLATFORM INSPECTION RESULTS 11 2.1. Platform Summary 11 2.2. Inspection Summary 11 2.3. ROV Inspection Notes 12

3. ANOMALIES 13 3.1. Members Anomalies 13 3.2. Anodes Anomalies 13 3.3. Risers and J-Tubes Anomalies 13 3.4. Clamps Anomalies 14 3.5. Conductors Anomalies 14 3.6. Caisson Anomalies 14 3.7. Other Components Anomalies 15

4. INSPECTION RESULTS 16 4.1. Platform Name Platform GVI Results 16 4.1.1. Platform Name Platform Verification 16 4.1.2. Members GVI Results 16 4.1.3. Anodes GVI Results 16 4.1.4. Risers and J-Tubes GVI Results 17 4.1.5. Clamps, Flanges, and Guides GVI Results 17 4.1.6. Caissons GVI Results 17 4.1.7. Conductors GVI Results 17 4.1.8. Flow lines GVI Results 18 4.1.9. Other Components GVI Results 18 4.2. Damages Results 18 4.3. Scour Inspection Results 18 4.4. Riser Face Measurements 20 4.5. Conductor Measurements 20 4.6. Selected Pile Inspection 20 4.7. Marine Growth Results (MG) 21 4.8. Cathodic Protection Results (CP) 21 4.9. Flooded Member Detection Results (FMD) 22 4.10. Wall Thickness Measurements Results (UT) 22 4.11. Critical Nodes Inspection (ACFM) 22 4.12. Debris Survey Results 22 4.13. Debris Removal 23 4.14. Anomaly Images 24

5. INSPECTION DRAWING 25 5.1. Platform Drawings 25 5.2. Platform Drawings with ACFM-FMD-CP-UT-MG locations 29 5.3. Platform Drawings with Anodes Identifications 30 5.4. Platform Drawings with Anomalies Location 31 5.5. Flow Lines GVI Inspection Drawings 32


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5.6. Riser Face Measurements Drawings 33 5.7. Scouring Inspection Drawings 34

APPENDIX A – SURVEY PARAMETERS 35

APPENDIX B – ANOMALY CRITERIA 38

APPENDIX C – COMPLETE EVENT LISTING 41

List of Tables

Table 1: Platform Name Platform – Platform Summary 11 Table 2: Platform Name Platform – Summary of Results 12 Table 3: Platform Name Platform – Members Anomalies 13 Table 4: Platform Name Platform – Anodes Anomalies 13 Table 4: Platform Name Platform – Risers and J-Tubes Anomalies 13 Table 5: Platform Name Platform – Clamps Anomalies 14 Table 5: Platform Name Platform – Conductors Anomalies 14 Table 8: Platform Name Platform – Caisson Anomalies 14 Table 9: Platform Name Platform – Other Components Anomalies 15 Table 7: Platform Name Platform – Members GVI Results 16 Table 8: Platform Name Platform – Anodes GVI Results 16 Table 9: Platform Name Platform – Risers and J-Tubes GVI Results 17 Table 10: Platform Name Platform – Clamps and Flanges GVI Results 17 Table 10: Platform Name Platform – Caissons GVI Results 17 Table 11: Platform Name Platform – Conductors GVI Results 18 Table 12: Platform Name Platform – Flow lines GVI Results 18 Table 13: Platform Name Platform – Other Components GVI Results 18 Table 14: Platform Name Platform – Scour Inspection Results 19 Table 15: Platform Name Platform – Riser Face Measurements 20 Table 16: Platform Name Platform – Conductors Measurements 20 Table 17: Platform Name Platform – Selected Pile Sleeves Inspection Results 20 Table 18: Platform Name Platform – Marine Growth Inspection Results 21 Table 19: Platform Name Platform – CP Inspection Results 22 Table 20: Platform Name Platform – FMD Inspection Results 22 Table 21: Platform Name Platform – UT Inspection Results 22 Table 22: Platform Name Platform – ACFM Inspection Results 22 Table 24: Platform Name Platform – Debris Survey Results 23 Table 25: Platform Name Platform – Debris Removal Results 23 Table 15: GPS Satellite System Geodetic Parameters 36 Table 16: Project Geodetic Parameters 36 Table 17: Survey Units 37 Table 18: Event Dimension Definitions 37 Table 19: Anode Depletion Grades 37 Table 29: Members Anomaly Criteria 39 Table 30: Anodes Anomaly Criteria 39 Table 31: Risers and J-Tubes Anomaly Criteria 39 Table 32: Anode Wastage Grades 40 Table 33: Platform Name Platform – Members Event list 42 Table 34: Platform Name Platform – Anodes Event list 42 Table 35: Platform Name Platform – CP Event list 43

List of Drawings

Drawing 1: Platform Name Platform – Isometric Drawing 25 Drawing 2: Platform Name Platform – ELEV XX 26 Drawing 8: Platform Name Platform – FACE XX 27


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Drawing 11: Platform Name Platform – Conductor XX Isometric View 28 Drawing 12: Platform Name Platform – ACFM-FMD-CP-UT-MG Locations (FACE XX) 29 Drawing 13: Platform Name Platform – Anodes Identifications (ELEV XX) 30 Drawing 14: Platform Name Platform – Anomalies Location (ELEV XX) 31 Drawing 15: Platform Name Platform – Flow line/ Riser XX 32 Drawing 16: Platform Name Platform – Riser Face Measurements (ELEV XX) 33 Drawing 17: Platform Name Platform – Scouring Inspection (FACE XX) 34

List of Figures

Figure 1: Project Location Diagram 7 Figure 2: Platform Name Platform Location 8 Figure 3. XXXX 24 Figure 4. XXXX 24


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GLOSSARY OF ABBREVIATIONS

ROV Remotely Operated Vehicle

GVI General Visual Inspection

CP Cathodic Potential

Anode Galvanic (Sacrificial) component, coupled directly to the structure to be protected

Member Horizontal, vertical or diagonal components of the jacket

Leg The main vertical component, constructed from a number of sections welded

together, supporting the rest of the structure

Caisson Open bottomed tubular components terminating at various depths for the purpose

of the intake or discharge of water or waste

Caisson Guide Elements used to support caisson at each level

Conductor Tubes for drilling purposes connecting seabed wells to the topside

Conductor Guide Elements used to support conductor at each level

Conductor Guide Frame Horizontal sections of framework, which restrain and guide the conductors

Riser Vertical pipeline extending the full height of the jacket and used for transporting oil

or gas

Riser Clamp Elements used to support vertical runs of piping at each level

Riser Guard A protective sleeve protects a riser that extends between a subsea and a floating

vessel

J-Tube A tube shaped like a J letter, extending from the top of a jacket to the mud line (or

close to the mud line), with a bell mouth on the end, pull tube houses an umbilical

or flexible flow line from/to the bottom part of the Platform up to/from the topside

Mud mat Elements used to provide additional support and stability while conducting drilling

operations in any soft bottom environment

Boat Landing A structure includes a steel jacket capable of supporting an operating equipment

deck. A boat landing or stage is attached to the jacket after installation of the latter

at an offshore site. The boat landing can thereby be guidable and vertically

positioned above the water's mean surface level by adjustment along a tracking

member prior to being affixed in place on the structure

HM Horizontal Member

HDM Horizontal Diagonal Member

VM Vertical Member

VDM Vertical Diagonal Member

PD Physical Damage

MSL Mean Sea Level


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Project Location

Figure 1: Project Location Diagram


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Figure 2: Platform Name Platform Location


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1. INTRODUCTION

Contractor Company Name was contracted by End Client to provide ROV Survey services with respect to the inspection of offshore platforms in the Field Name field, offshore ……………….

This document provides the details the services in conducting a ROV General Visual Inspection (GVI),

Cathodic Potential Measurements (CP) and Scouring inspection on Platform Name Platform.

The inspection was conducted in the ddh of Month YYYY. The dynamically positioned (DP) vessel Zakher Pioneer Providence was in charge to conduct the survey and was fitted with XX (Number in letters) ROV system. All inspection related works were carried out in accordance with End Client Name’s requirements/ Contractor’s standing work practices.

1.1. Definitions

PROJECT ROV Inspection of Subsea Pipelines/Cable/Structure

COMPANY End Client

CONTRACTOR Contractor Company Name

SURVEY SUB-CONTRACTOR Contractor Company Name

ROV SUB-CONTRACTOR Contractor Company Name

LOGGING, PROCESSING, AND MCS Free Zone

REPORTING SUB-CONTRACTOR

CP SUB-CONTRACTOR XXXXX

1.2. Project Scope of Work

The scope of work to be carried out by contractor under this contract was to undertake ROV pipeline

inspection offshore the ………………… The scope of required services can be summarized as follows:

1.2.1. Pipeline Survey

The scope of work to be carried out by contractor under this section of the contract was to conduct

inspection surveys of existing pipeline infrastructure in the Field Name field, offshore …………. The

scope of required services can be summarized as follows

ROV inspection survey of No of surveyed pipes subsea pipelines (approximately Total

Length of pipes/cables Km).

The purpose of the pipeline survey was the visual assessment of the basic properties (presence /

absence, overall integrity, obvious damage, surface condition, etc.) of the pipeline and associated

attachments.

1.2.2. Platform Inspection

The scope of work to be carried out by contractor under this section of the contract is to conduct

external inspection surveys of designated platforms in Field Name, as part of the End Client Name

routine platform inspection project.

The scope of required services can be summarized as follows:


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General Visual Inspection (GVI):

Cathodic Protection and Anode Inspection:

Riser Inspection:

Riser Clamp Inspection:

1.2.3. Optional Work

The client had informed contractor that upon completion of the pipeline survey/platform inspection

addition survey operations may be required to be undertaken by the ROV, these being:

Seabed survey.

Spud can survey.

The client confirmed all optional work prior to the completion of pipeline survey/platform inspection

operations


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2. PLATFORM NAME PLATFORM INSPECTION RESULTS

2.1. Platform Summary

Platform Name Platform – Platform Summary

Item Description

Background

XXXX Platform is a XX legged structure with XX horizontal frames at the

following depths:

XX.X (Above sea level)

XX.X ft

XX.X ft

XXXX Platform contains XX members and XX anodes

Platform Coordinates Easting = XXXXXX. XX, Northing = XXXXXX. XX

Water Depth XX. XX ft

Table 1: Platform Name Platform – Platform Summary

2.2. Inspection Summary

Platform Name Platform – Inspection Summary

Item Summary Inspection Results

Inspection Dates From ddth of Month YYYY to ddth of Month YYYY

General Condition XXXX Platform components generally found to be in a good condition,

except for XX anomalies were noted during Inspection.

Platform Verification Most of structural members were inspected during the GVI and were found

to be matching the as-built drawings

Anomalies

XX Anomalies were observed during inspection on the platform

components

XX Items of metallic debris

XX Items of non-metallic debris

XX Incidents of suspended members

XX Incidents of anomalous marine growth readings

XX Incidents of low CP readings

Damage Survey No incident of physical damages was found

Cathodic Protection

Inspection XX Anomalous CP readings were obtained

Scour Inspection XX Incidents of suspended members were found

Debris Inspection XX Anomalous debris were found

Marine Growth

Inspection XX Anomalous marine growth readings were obtained

FMD Inspection No flooded member was found

ACFM Inspection No anomalous ACFM readings was obtained

UT Inspection No anomalous UT readings was obtained

Conductor Inspection No anomaly was observed during inspection on the platform conductors

Protection Tube

Inspection The platform contains no protection tubes


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Platform Name Platform – Inspection Summary

Item Summary Inspection Results

Boat Landing

Inspection

XX Anomalous were observed during inspection on the platform boat

landing

Debris Removal XX Debris removal actions were performed on the platform

Clamp Inspection XX Anomalies were observed during inspection on the platform clamps

Riser Face

Measurements XX Measurements were taken on XX elevations of the platform

Table 2: Platform Name Platform – Summary of Results

2.3. ROV Inspection Notes

1. Members IDs were generated according to MCS unique numbering system.

2. MCS numbering system has been used to identify the elements in this report and on the audio

commentary.

3. CP measurements were performed for selected locations by Client on XX positions on Platform

Name platform


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3. ANOMALIES

3.1. Members Anomalies

XX (Number in letters) anomalies were observed during the GVI and CP inspection of the platform.

The table below shows the details of member anomalies results


XX Incidents of suspended members

Platform Name Platform – Members Anomalies

No. Component

ID

Anomaly

Code Type Location Comment

Table 3: Platform Name Platform – Members Anomalies

3.2. Anodes Anomalies

XX (Number in letters) anomalies were observed during the inspection of the platform. The table

below shows the details of anodes anomalies results


XX Anomalous marine growth readings

Platform Name Platform – Anodes Anomalies

No. Component

ID

Anomaly


Table 4: Platform Name Platform – Anodes Anomalies

3.3. Risers and J-Tubes Anomalies


below shows the details of risers and J-tubes anomalies results

XX Metallic debris

XX Anomalous marine growth readings

Platform Name Platform – Risers and J-Tubes Anomalies

No. Component

ID

Anomaly


Table 5: Platform Name Platform – Risers and J-Tubes Anomalies


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3.4. Clamps Anomalies


below shows the details of clamps anomalies results

XX Low CP readings

Platform Name Platform – Clamps Anomalies

No. Component

ID

Anomaly


Table 6: Platform Name Platform – Clamps Anomalies

3.5. Conductors Anomalies


below shows the details of conductors anomalies results

XX Low CP readings

Platform Name Platform – Conductors Anomalies

No. Component

ID

Anomaly


Table 7: Platform Name Platform – Conductors Anomalies

3.6. Caisson Anomalies


below shows the details of caisson anomalies results

XX Low CP readings

Platform Name Platform – Caisson Anomalies

No. Component

ID

Anomaly


Table 8: Platform Name Platform – Caisson Anomalies


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3.7. Other Components Anomalies


below shows the details of other components anomalies results

XX Low CP readings

Platform Name Platform – Other Components Anomalies

No. Component

ID

Anomaly


Table 9: Platform Name Platform – Other Components Anomalies


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4. INSPECTION RESULTS

4.1. Platform Name Platform GVI Results

The following section presents the observed events recorded during the Platform Name platform GVI

inspection. A complete listing of all events is included in Appendix C.

4.1.1. Platform Name Platform Verification

Platform Name platform is a XX legged structure with XX horizontal frames at the following depths:

XX.Xm (Above sea level)

XX.Xm

XX.Xm

Platform Name platform contains XX members and XX anodes

4.1.2. Members GVI Results

Platform Name platform contains XX (Number in letters) members. The table below shows the details

of members GVI results

Platform Name Platform – Members GVI Results

Component ID

Location Type Anomaly

Code DIVER/ROV Comment

Table 10: Platform Name Platform – Members GVI Results

4.1.3. Anodes GVI Results

Platform Name platform contains XX (Number in letters) anodes. The table below shows the details of

anodes GVI results

Platform Name Platform – Anodes GVI Results

ID Location Component

ID Depletion

Anomaly Code

DIVER/ROV Comment

Table 11: Platform Name Platform – Anodes GVI Results


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4.1.4. Risers and J-Tubes GVI Results

Platform Name platform contains XX (Number in letters) risers and XX (Number in letters) J-tube. The

table below shows the details of risers and J-tubes GVI results

Platform Name Platform – Risers and J-Tubes GVI Results

Component ID

Location Name Anomaly


Table 12: Platform Name Platform – Risers and J-Tubes GVI Results

4.1.5. Clamps, Flanges, and Guides GVI Results

Platform Name platform contains XX (Number in letters) clamps, XX (Number in letters) flanges and

XX (Number in letters) conductor guides. The table below shows the details of Clamps, Flanges, and

Guides GVI results

Platform Name Platform – Clamps, Flanges, and Guides GVI Results

Component ID



Table 13: Platform Name Platform – Clamps and Flanges GVI Results

4.1.6. Caissons GVI Results

Platform Name platform contains XX (Number in letters) caissons. The table below shows the details

of caissons GVI results

Platform Name Platform – Caissons GVI Results

Component ID



Table 14: Platform Name Platform – Caissons GVI Results

4.1.7. Conductors GVI Results

Platform Name platform contains XX (Number in letters) conductors. The table below shows the

details of conductors GVI results

Platform Name Platform – Conductors GVI Results

Component ID




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Platform Name Platform – Conductors GVI Results

Component ID



Table 15: Platform Name Platform – Conductors GVI Results

4.1.8. Flow lines GVI Results

Platform Name platform contains XX (Number in letters) flow lines, and XX (Number in letters) cables,

the survey is conducted on the sea lines for XXm from the platform. The table below shows the details

flow lines GVI results

Platform Name Platform – Flow lines GVI Results

Component ID



Table 16: Platform Name Platform – Flow lines GVI Results

4.1.9. Other Components GVI Results

The table below shows the details of other components GVI results

Platform Name Platform – Other Components GVI Results

Component ID



Table 17: Platform Name Platform – Other Components GVI Results

4.2. Damages Results

Damage inspection was performed during the GVI on all of the platform components and the following

damages to the Platform Name platform observed

OR

No damages were observed during Platform Name platform inspection

4.3. Scour Inspection Results

The seabed scour inspection was undertaken on the Platform Name platform to establish if any

suspension of horizontal elements, or seabed scouring, has occurred under the mud line external

horizontal members.

Depth readings were used to derive the scouring value, (the vertical distance between the bottom of

the horizontal element and the seabed) measured in Feet. This depth value was derived using the

following equation:

SV = (DS – (DT+EW)) Where:


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SV: Scouring Value

DS: Depth reading on the Seabed (On the nearest point to the element)

DT: Depth reading on the top of the horizontal element

EW: Element width (e.g. diameter)

In the case where a scour was found under a mud line horizontal member, only two depth readings

were taken; one reading on the seabed and one on the top of the scouring element.

If any horizontal member on the mud line was found to be fully suspended above the seabed, six

depth readings were taken, at three locations as follows, and as illustrated in Figure 1:

1. Two depth readings will be taken approximately one meter from the 1st end (welding point):

one reading on seabed, and one on top of the suspended member.

2. Two depth readings will be taken at the approximate mid-point of the member: one reading on

the seabed, and one on top of the suspended member.

3. Two depth readings will be taken at approximately one meter from the 2nd end (welding point):

one reading on the seabed, and one on top of the suspended member.

Platform Name Platform – Scour Inspection Results

Component ID

Location Comment

Table 18: Platform Name Platform – Scour Inspection Results


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4.4. Riser Face Measurements

Riser Face measurement was conducted on the external horizontal members supporting the risers by

mean of clamps and riser guides at every elevation.

The datum of the measurement was at the welding point between every external horizontal member

and leg nodes at leg B2.

The following table and figures show the obtained measurements at each elevation.

Platform Name Platform – Riser Face Measurements

Component ID

Location DIVER/ROV Comment

Table 19: Platform Name Platform – Riser Face Measurements

4.5. Conductor Measurements

The following table and figures show the obtained measurements.

Platform Name Platform – Conductors Measurements

Component ID

Location Name DIVER/ROV Comment

Table 20: Platform Name Platform – Conductors Measurements

4.6. Selected Pile Inspection

Platform Name platform contains XX (Number in letters) pile sleeves. The table below shows the

details of selected pile sleeves inspection results

Platform Name Platform – Selected Pile Sleeves Inspection Results

Component ID



Table 21: Platform Name Platform – Selected Pile Sleeves Inspection Results


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4.7. Marine Growth Results (MG)

Marine growth inspection was performed during the GVI on Platform Name platform, using graded

probe to stab the members for measuring the MG thickness on selected platform components, in order

to estimate the thickness, coverage, type and pattern of marine growth from waterline to mud line to

enable comparison with the as-built assumptions.

In the upper levels the hard growth coverage is the major coverage decreasing toward the mud line,

while the soft coverage decreased towards the sea surface.

XX (Number in letters) Anomalous MG readings were obtained during the MG Inspection. The table

below shows the details of marine growth inspection results

Platform Name Platform – Marine Growth Inspection Results

Component ID

Location Component

Type %

Hard %

Soft Thickness

(mm) DIVER/

ROV Comment

Table 22: Platform Name Platform – Marine Growth Inspection Results

4.8. Cathodic Protection Results (CP)

The cathodic protection system inspection on Platform Name platform was performed by ROV using

CP probe.

XX (Number in letters) anodes were found during the GVI & CP inspection with the following depletion:

XX (Number in letters) anodes were found to be slightly depleted (<25% - Grade 1).

XX (Number in letters) anodes were found to be moderately depleted (25% - 50% Grade 2).

XX (Number in letters) anode was found to be heavily depleted (50% - 75% Grade 3).

XX (Number in letters) anode was found to be totally depleted (75% - 100% Grade 4).

XX (Number in letters) anode was found to be disconnected (Grade 5).

XX (Number in letters) anode was found to be totally buried.

Readings should be between -800mV and -1050mV. Any readings outside these limits shall be

considered as anomalous.

The table below shows the details of anodes condition results

Cathodic protection measurements, which were taken on selected locations specified by End Client.

The platform showed a good level of protection, there were XX (Number in letters) anomalous

readings. The range of anodes CP readings were from -630mV to -1010mV.

Cathodic protection calibration was done under water before the inspection. The table below shows

the details of all CP inspection results

Platform Name Platform – CP Inspection Results

ID Component

ID Location

Component Type

CP (-mV)

DIVER/ROV

Comment


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Platform Name Platform – CP Inspection Results

ID Component

ID Location

Component Type

CP (-mV)

DIVER/ROV

Comment

Table 23: Platform Name Platform – CP Inspection Results

4.9. Flooded Member Detection Results (FMD)

The table below shows the details of all FMD inspection results

Platform Name Platform – FMD Inspection Results

Component ID

Type Location DIVER/

ROV Comment

Table 24: Platform Name Platform – FMD Inspection Results

4.10. Wall Thickness Measurements Results (UT)

The table below shows the details of all UT inspection results

Platform Name Platform – UT Inspection Results

ID Component

ID Location

Component Type

UT (mm)

DIVER/ROV

Comment

Table 25: Platform Name Platform – UT Inspection Results

4.11. Critical Nodes Inspection (ACFM)

All ACFM results showed the welds on the selected nodes to be in good condition, all nodes have

been cleaned before ACFM. The table below shows the details of all ACFM inspection results

Platform Name Platform – ACFM Inspection Results

Component ID

Component Type

Location DIVER/ROV Comment

Table 26: Platform Name Platform – ACFM Inspection Results

4.12. Debris Survey Results

A debris survey was performed during the GVI on all of the platform components, in order to establish

nature of debris and to establish if any structural damage of the structure is associated with debris.

Debris which is considered anomalous is metallic debris which is in contact with the platform

elements.

None of the components inspected were affected by anomalous metallic debris that came within the

definitions prescribed in the scope of work. The table below shows the details of all debris inspection

results


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Platform Name Platform – Debris Survey Results

Location PCode SCode Anomaly

code East North Comment

Table 27: Platform Name Platform – Debris Survey Results

4.13. Debris Removal

The table below shows the details of debris removal results

Platform Name Platform – Interim Debris Removal Results

Face Comment

Table 28: Platform Name Platform – Debris Removal Results


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4.14. Anomaly Images

Anomaly No. XX Anomaly Code XX Anomaly No. XX Anomaly Code: XX

Component ID XXXX Component ID XXXX

Description XXXXXXXXXXXXX Description XXXXXXXXXXXXX

Figure 3. XXXX Figure 4. XXXX


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5. INSPECTION DRAWING

5.1. Platform Drawings

Drawing 1: Platform Name Platform – Isometric Drawing


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Platform Name Platform – ELEV-xx

Drawing 2: Platform Name Platform – ELEV XX


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Platform Name Platform – FACE XX

Drawing 3: Platform Name Platform – FACE XX


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Drawing 4: Platform Name Platform – Conductor XX Isometric View


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5.2. Platform Drawings with ACFM-FMD-CP-UT-MG locations

Drawing 5: Platform Name Platform – ACFM-FMD-CP-UT-MG Locations (FACE XX)


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5.3. Platform Drawings with Anodes Identifications

Drawing 6: Platform Name Platform – Anodes Identifications (ELEV XX)


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5.4. Platform Drawings with Anomalies Location

Drawing 7: Platform Name Platform – Anomalies Location (ELEV XX)


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5.5. Flow Lines GVI Inspection Drawings

Drawing 8: Platform Name Platform – Flow line/ Riser XX


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5.6. Riser Face Measurements Drawings

Drawing 9: Platform Name Platform – Riser Face Measurements (ELEV XX)


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5.7. Scouring Inspection Drawings

Drawing 10: Platform Name Platform – Scouring Inspection (FACE XX)


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Appendix A – Survey Parameters


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GPS Satellite System Geodetic Parameters The geodetic parameters for the WGS84 Spheroid and Datum are as follows:

GPS Satellite System Geodetic Parameters

Parameter Value

Spheroid XXXXX

Semi-Major Axis (a) XXXXX

Semi-Minor Axis (b) XXXXX

First Eccentricity Squared (e2) XXXXX

Inverse Flattening (1/f) XXXXX

Datum XXXXX

Source: XXXXX

Table 29: GPS Satellite System Geodetic Parameters

Project Geodetic Parameters The following Spheroid, Projection and Transformation Parameters were utilized throughout the duration of

the survey and within this document.

Project Geodetic Parameters

Parameter Value

Spheroid XXXXX

Semi-Major Axis (a) XXXXX

Semi-Minor Axis (b) XXXXX

First Eccentricity Squared (e2) XXXXX

Inverse Flattening (1/f) XXXXX

Datum XXXXX

Projection XXXXX

Central Meridian (CM) XXXXX

Latitude of Origin XXXXX

False Easting XXXXX

False Northing XXXXX

Scale Factor on CM XXXXX

Transformation Parameters (ITRF 2000 – epoch 1997.0 to Nahrwan 1967)

Translation XXXXX XXXXX XXXXX

Rotation XXXXX XXXXX XXXXX

Scale Factor XXXXX XXXXX

Rotation Convention: Coordinate Frame Rotation (Right Handed Convention)

Source: XXXXX

Table 30: Project Geodetic Parameters


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Survey Units The following survey units were used throughout the project and within this document.

Survey Units

Type Unit

Time XXXXX

Linear units XXXXX

Velocity XXXXX

Angular units XXXXX

Table 31: Survey Units

Event Information All events are described and dimensioned. All dimensions are in terms of the following:

Event Dimension Definitions

Type of Dimension Example

XXXXX XXXXX

XXXXX XXXXX

XXXXX XXXXX

XXXXX XXXXX

Table 32: Event Dimension Definitions

Anode Depletion Grades

Depletion Grades Depletion Percentage

XXXXX XXXXX

XXXXX XXXXX

XXXXX XXXXX

XXXXX XXXXX

Table 33: Anode Depletion Grades


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Appendix B – Anomaly Criteria


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Members Anomaly Criteria

Event Type Anomaly Code Description

Metallic Debris DB Any metallic debris in contact must be reported as anomaly

Scour SC Any suspension for the mud line members

Lack of Integrity LI Any lack of integrity must be reported as anomaly

Any missing item must be reported as anomaly

Burial BU Any burial of the member must be reported as anomaly

Cathodic Protection CP Reading < -1100mv, Reading > -850mv must be reported as anomaly

Corrosion CR Corrosion > 25% must be reported as anomaly

Physical Damage PD Any physical damage must be reported as anomaly

Relative Movement RM Any relative movement must be reported as anomaly

Wear WR Any reduction in diameter > 20% must be reported as anomaly

Table 34: Members Anomaly Criteria

Members Anomaly Criteria


Metallic Debris DB Any metallic debris in contact must be reported as anomaly


Burial BU Total burial of the member must be reported as anomaly

Cathodic Protection CP Reading < -1100mv, Reading > -850mv must be reported as anomaly


Table 35: Anodes Anomaly Criteria

Risers and J-Tubes Anomaly Criteria


Metallic debris DB Any metallic debris in contact must be reported as anomaly


Any missing item must be reported as anomaly

Cathodic Protection CP Reading < -1100mv, Reading> -850mv must be reported as anomaly

Corrosion CR Corrosion > 25% must be reported as anomaly


Relative Movement RM Any relative movement with abrasion > 1mm must be reported as anomaly

Wear WR Any reduction in diameter > 20% must be reported as anomaly

Table 36: Risers and J-Tubes Anomaly Criteria


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Anode Wastage Grades

Description Depletion

Grade Comment

Anode wastage < 25% Grade 1 Anodic material is slightly pitted

25% < Anode wastage < 75% Grade 2 Anodic material is moderately pitted

Anode wastage > 75% Grade 3 Anodic material is heavily pitted

Anode wastage = 100% Grade 4 Anodic material is totally wasted

Anode appearance is as new (clean and smooth) in comparison to adjacent anodes

Grade 5 Anode appears disconnected

Table 37: Anode Wastage Grades


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Appendix C – Complete Event Listing


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A- Members Event list

Platform Name Platform – Members Event list

ID LOCATION TYPE ANOMALY COMMENTS

Table 38: Platform Name Platform – Members Event list

B- Anodes Event list

Platform Name Platform – Anodes Event list

ID COMPONENT

ID LOCATION DEPLETION ANOMALY COMMENTS

Table 39: Platform Name Platform – Anodes Event list


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C- Risers and J-Tubes Event list

No Risers in XXXX platform D- Clamps Event list

No Clamps in XXXX platform E- Caisson Event list

No caisson in XXXX platform F- CP Event list

Platform Name Platform – CP Event list

ID COMPONENT ID COMPONENT TYPE COMMENTS

Table 40: Platform Name Platform – CP Event list

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