Vacuum Box Testing

Job N°: 268129 KASHAGAN DEVELOPMENT EXPERIMENTAL PROGRAMME PROJECT Page : 3 of 8 Hook-up and Commissioning of Complex D and Island A - Offshore Facilities Doc. No.: 268129-SA-PR-8039-00 Rev. C01

REVISION RECORD SHEET Revision

Description

Page No.(s)

A01

Issued for internal Review

7

P01

Issued for Company Review / Approval

8

C01

Issued for Construction

8

KE01-00-000-AN-Q-PR-0077-000-C01

PROCEDURE - VACUUM BOX TESTING PROCEDURE FOR TANKS

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Job N°: 268129 KASHAGAN DEVELOPMENT EXPERIMENTAL PROGRAMME PROJECT Page : 4 of 8 Hook-up and Commissioning of Complex D and Island A - Offshore Facilities Doc. No.: 268129-SA-PR-8039-00 Rev. C01 INDEX 1

SCOPE

5

2

REFERENCE DOCUMENTS

5

3

DEFINITIONS AND ABBRIVIATION

5

4

PERSONNEL

5

5

EQUIPMENT

6

6

TESTING

6

7

ACCEPTANCE CRITERIA

6

8

REPORTING

7

9

ATTACHMENT

8

ANNEX –VACUUM BOX TESTING REPORT

KE01-00-000-AN-Q-PR-0077-000-C01


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1.0

SCOPE This procedure describes the general requirements, method, technique and acceptance criteria for Vacuum Box Testing of welds in welded Storage tanks in accordance with API 650 and the extent shall be in accordance with an approved QCP

2.0

REFERENCES DOCUMENTS

[1]

KE01-00-000-KD-M-ST.0029-000 F01

Specification for Welded Steel Storage Tank.

3.0

[2]

KE01-00-000-KD-V-SS-0010-000 D02

Welding of Storage Tank

[3]

API 650

Welded Tank for Oil Storage.

DEFINITIONS and ABBREVIATION

Company – Contractor – Ndt Sub contractor API QCP Shall Should

4.0

AGIP KCO ERSAI NDT Laboratory (personnel and equipment) employed by ERSAI for Kashagan Experimental Development Program American petroleum institute Qulity Control Plan The word “shall” indicates a requirement The word “should” indicates recommendations

PERSONNEL

Personnel performing and witnessing Vacuum Box Testing shall have past experience in the activity. Specific Training to the Operators and Inspectors shall be given by NDT / QC Supervisor and shall be documented. Personnel performing Inspection / Interpretation / Evaluation shall have vision with or without correction to be able to read a Jaeger type 2 standard chart at a distance of not less than 300mm. This check shall be performed annually.

KE01-00-000-AN-Q-PR-0077-000-C01


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5.0

EQUIPMENT Following Equipment shall be used A. Vacuum Box of dimension 150mm wide by 750mm long with a clear window in the top with gaskets , seals etc B. Torch C. Soap Solution D. Vacuum Pump / Hoses E. Calibrated Vacuum Guage F. Calibrated Temperature guage G. Calibrated Light Intensity meter

6.0

TESTING Perform a good visual inspection of the surface / weld to be vacuum box tested. And check the temperature of the surface. Metal surface temperature shall be between 4°C to 52°C. Apply the soap solution on the area to be inspected. Place the open bottom portion of the vacuum box against the tank surface so that the weld to be inspected is in the centre of the box. Check f or the proper fit and seal. Apply a partial vacuum of 650mBar, for a minimum period of 5 seconds or the time required to view the area under test. Ensure minimum light intensity of 1000 Lux at t he point of examination. Look for any air bubbles in the area of interest. The test shall have at least 50mm overlap of previously inspected surface on each application.

7.0

ACCEPTANCE CRITERIA The presence of a through-thickness leak indicated by continuous formation or growth of a bubble(s) or foam, produced by air passing through the thickness, is Not Acceptable The presence of a large opening leak, indicated by a quick bursting bubble or spitting response at the initial setting of the vacuum box is Not Acceptable Leaks shall be repaired and retested.

KE01-00-000-AN-Q-PR-0077-000-C01


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8.0

REPORTING After completion of the inspection of activity, prepare the report as t he form in Annex 1

9.0

Attachment Annex - Vacuum Box Testing Report ( 268129-WELD-005-E-R)

KE01-00-000-AN-Q-PR-0077-000-C01


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Job N°: 268129 KASHAGAN DEVELOPMENT EXPERIMENTAL PROGRAMME PROJECT Page : 8 of 8 Hook-up and Commissioning of Complex D and Island A - Offshore Facilities Doc. No.: 268129-SA-PR-8039-00 Rev. C01 Annex

Vacuum Box Testing Report

KE01-00-000-AN-Q-PR-0077-000-C01


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Vacuum Box Testing

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