Silverwing B Scan Report

8/13/2019 Silverwing B Scan Report

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TANK INSPECTION REPORT-SHELL/ROOF

SILVERWING AFRICA LIMITED

CLIENT NAME:

LOCATION:

TANK IDENTIFICATION: ULP TANK 22

INSPECTION START DATE: 9 May 2011

SWA JOB No.:

CLIENT PO No.:

Silverwing Africa (PTY) Ltd; Unit 12Ebenezer Park, 71-13Killarney AvenueKillarney Gardens, Cape Town, South Africa. Tel: 021 5575440Fax: 021 5574354

Email:[email protected] Site: www.silverwingafrica.com

INSPECTION CARRIED OUT BY:

REPORT AUTHORIZED BY:

DATE: 15/05/2011


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Silverwing Africa (PTY) LTDReg Nr 2009/014597/07

Page 1 of 29Silverwing Africa (PTY) LTD, Private bag X1 Postnet Suite 419 Melkbosstrand 7437, Tel: (+27) 21 557 5740, Fax: (+27) 21 557 4354

INSPECTION DETAILS

Client BP Southern Africa

Location Matola(Mozambique)

Tank Identification Tk-22

Inspection Date 9 May 2011

Job Number

Report Number

Location Inspection Type Procedure Number

Roof Plates

Shell Plates


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SCOPE OF INSPECTION

Shell and DishPlates

Inspection scope

Carry out a B-Scan thickness survey of the shell platesconsisting of 8 spaced Horizontal scans across the 9courses and 2 spaced scans on the Roof Plates 1horizontal and 1 vertical scan.

Cleanliness The Shell plates were clean to a sufficient standard toallow a C-Scan inspection to take place; some area hadpaint coming off from the plates on the external surface.

Results The B-Scan data will be saved on a CD, the data will beanalysed by Silverwing Africa (PTY) Ltd so that themeasured minimum plate or wall thickness andmeasured average plate thickness and Nominal platethickness (if provided by client) will be recorded andpresented as a hard copy.

Restrictions The width of each B-Scan is approximately 10mm.A single probe of 10mm Diameter and 5MHz.

Electronic report A CD is attached to this report which contains thefollowing information:

Microsoft Word document of the B-scan Report.Microsoft Word document of the Manual UT.


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PROCEDURE

1. Aim was to conduct an ultra-sonic B scan inspection on the external plates of the shell andexternal plates on the roof of Tank 22.

2. The shell was divided in 8 locations and vertical scans was done up the shell wall for all 9streaks.

Please refer to Gauging diagram for tank shell.

3. The roofwas dived into 4 locations and a scan was taken from the outside diameter of the roofand the crawler was moved towards centre.

Please refer to Gauging diagram for tank roof.

4. Manual UT was done around the tank to confirm the plate thickness and also on the roof plates.

These reports are also attached to our report for future reference.

5. Observations noted while carrying out our inspection will also be added in our report.

This was a visual inspection and not a physical inspection.

ABBREVIATIONS

1. C- Course2. S- Scans3. Loc- Location (Indicated with

N.B:All areas with NO DATA could be caused by the following

1. Excessive dirt

2. Irregular surface or paint that does not adhere to the metal

Where there are areas with NO DATA due to clustered pitting it will be specified on the observation of

the affected are


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DIAGRAM FOR TANK SHELL

Course 9Course 8Course 7Course 6Course 5Course 4Course 3Course 2

Course 1

Bottom Plate(Manual UT)

Welding

3D View Flat View


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GAUGING DIAGRAM FOR TANK-SHELL

North Top View

Loc 6

Loc 7Loc 5 Loc 7

Loc 4 Loc 8

Loc 3 Loc 1

Loc 2

South Manhole


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DIAGRAM FOR TANK-ROOF


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B-SCAN SHELL PLATE ANALYSIS SUMMARY FORTANK NO. 22

The UT B-scans recorded during the survey have been analysed and measured average wall thickness,measured minimum wall thickness,measured maximum wall thickness and nominal wall thickness (ifgiven by client) for each scan is shown below.

LOCATION 1

Scan NumberMeasuredAverage WallThickness

Measured MinimumWall Thickness

Observations

Location1 S1C1 mm mmGeneral corrosion noted with scatteredpitting.



Location1 S1C4 mm mm

General corrosion noted with scattered

pitting.


Location1 S1C6 mm mmGeneral corrosion noted with isolatedpitting.





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1. LOCATION 1

S1C1.

OBSERVATION.

-Material loss between 0.00mm to mm noted across the scanned area, which is % loss in relation to the

measred a!era"e #late thic$ness.

-Measred maimm wall thic$ness& mm

-Measred a!era"e wall thic$ness& mm

-Measred minimm wall thic$ness& mm


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'. LOCATION 1

S1C'.

OBSERVATION.







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(. LOCATION 1

S1C(.

OBSERVATION.







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). LOCATION 1

S1C).

OBSERVATION.







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*. LOCATION 1

S1C*.

OBSERVATION.







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+. LOCATION 1

S1C+.

OBSERVATION.







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. LOCATION 1

S1C.

OBSERVATION.







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. LOCATION 1

S1C.

OBSERVATION.







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. LOCATION 1

S1C.

OBSERVATION.






LOCATION 2



Observations



Location2 S1C3 mm mmGeneral corrosion noted with isolatedshallow pitting.


General corrosion noted with isolated

scattered pitting.







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10.LOCATION '

S1C1.

OBSERVATION.






11.LOCATION '

S1C'.

OBSERVATION.






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1'.LOCATION '

S1C(.

OBSERVATION.






1(.LOCATION '

S1C).

OBSERVATION.






1).LOCATION '

S1C*.

OBSERVATION.






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1*.LOCATION '

S1C+.

OBSERVATION.






1+.LOCATION '

S1C.

OBSERVATION.






1.LOCATION '

S1C.

OBSERVATION.





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1.LOCATION '

S1C.

OBSERVATION.






LOCATION 3



Observations




Location3 S1C4 mm mmGeneral corrosion noted with isolated spitting.

Location3 S1C5 mm mm General corrosion noted with isolatedpitting.






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1.LOCATION (

S1C1.

OBSERVATION.






'0.LOCATION (

S1C'.

OBSERVATION.






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'1.LOCATION (

S1C(.

OBSERVATION.






''.LOCATION (

S1C).

OBSERVATION.






'(.LOCATION (

S1C*.

OBSERVATION.






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').LOCATION (

S1C+.

OBSERVATION.






'*.LOCATION (

S1C.

OBSERVATION.






'+.LOCATION (

S1C.

OBSERVATION.





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'.LOCATION (

S1C.

OBSERVATION.






LOCATION 4



Observations



Location4 S1C3 mm mmGeneral corrosion noted with scatteredshallow pitting.


Location4 S1C5 mm mm General corrosion noted with scatteredpitting.






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'.LOCATION )

S1C1.

OBSERVATION.






'.LOCATION )

S1C'.

OBSERVATION.






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(0.LOCATION )

S1C(.

OBSERVATION.






(1.LOCATION )

S1C).

OBSERVATION.






('.LOCATION )

S1C*.

OBSERVATION.






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(+.LOCATION )

S1C.

OBSERVATION.






LOCATION 5



Observations

Location5 S1C1 6.96mm 5.65mmGeneral corrosion noted with scatteredpitting.




Location5 S1C5 6.89mm 5.67mm General corrosion noted with scatteredpitting.

Location5 S1C6 6.60mm 5.48mmGeneral corrosion noted with isolatedpitting.





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(.LOCATION *

S1C1.

OBSERVATION.






(.LOCATION *

S1C'.

OBSERVATION.





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(.LOCATION *

S1C(.

OBSERVATION.






)0.LOCATION *

S1C).OBSERVATION.






)1.LOCATION *

S1C*.

OBSERVATION.





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)'.LOCATION *

S1C+.

OBSERVATION.






)(.LOCATION *

S1C.OBSERVATION.






)).LOCATION *

S1C.

OBSERVATION.





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)*.LOCATION *

S1C.

OBSERVATION.






LOCATION 6



Observations



Location6 S1C3 mm mmGeneral corrosion noted with isolatedshallow pitting.

Location6 S1C4 mm mmGeneral corrosion noted with isolatedscattered pitting.





Location6 S1C9 mm mmGeneral corrosion noted with scattered

pitting.


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)+.LOCATION +

S1C1.

OBSERVATION.






).LOCATION +

S1C'.

OBSERVATION.





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).LOCATION +

S1C(.

OBSERVATION.






).LOCATION +

S1C).OBSERVATION.






*0.LOCATION +

S1C*.

OBSERVATION.





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*1.LOCATION +

S1C+.

OBSERVATION.






*'.LOCATION +

S1C.OBSERVATION.






*(.LOCATION +

S1C.

OBSERVATION.





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*).LOCATION +

S1C.

OBSERVATION.






LOCATION 7



Observations





General corrosion noted with isolated s

pitting.







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**.LOCATION

S1C1.

OBSERVATION.






*+.LOCATION

S1C'.

OBSERVATION.





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*.LOCATION

S1C(.

OBSERVATION.






*.LOCATION

S1C).OBSERVATION.






*.LOCATION

S1C*.

OBSERVATION.





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+0.LOCATION

S1C+.

OBSERVATION.






+1.LOCATION

S1C.OBSERVATION.






+'.LOCATION

S1C.

OBSERVATION.





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+(.LOCATION

S1C.

OBSERVATION.






LOCATION 8



Observations



Location8 S1C3 mm mmGeneral corrosion noted with scatteredshallow pitting.


General corrosion noted with isolated

pitting.







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+).LOCATION

S1C1.

OBSERVATION.






+*.LOCATION

S1C'.

OBSERVATION.





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++.LOCATION

S1C(.

OBSERVATION.






+.LOCATION

S1C).OBSERVATION.






+.LOCATION

S1C*.

OBSERVATION.





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+.LOCATION

S1C+.

OBSERVATION.






0.LOCATION

S1C.OBSERVATION.






1.LOCATION

S1C.

OBSERVATION.





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'.LOCATION

S1C.

OBSERVATION.






Documents

Silverwing B Scan Report