PROJECT TITLE
DOCUMENT NO
EPC PROYEK SENORO
SELATAN
SNS-Q-PR-10-037
DISCIPLINE
REV : A
QA/QC
PAGE : 1 / 13
AREA
ISSUED DATE
N/A
21/05/2024
PROCEDURE
BASED LINE THICKNESS INSPECTION PROCEDURE
REVISION SHEET
A
REV
21/05/2024
DATE
Issued For Review
PURPOSE
FDH
DNY
AGS
PREPARED
CHECKED
APPROVED
BY
BY
BY CTR
BY
DATE
APPROVED
BY JOB TOMORI
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INSPECTION PROCEDURE
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TABLE OF CONTENTS
1.
2.
FUNCTIONALITY ...................................................................................................................... 4
OBJECTIVE................................................................................................................................. 5
3.
DEFINITION AND TERMS ....................................................................................................... 5
3.1 DEFINITION AND TERMS .................................................................................................................................................. 5
3.2 ABBREVIATIONS ................................................................................................................................................................ 5
4.
REFERENCES ............................................................................................................................. 6
4.1 CODES, STANDARDS AND REFERENCES ......................................................................................................................... 6
4.2 COMPANY STANDARDS AND SPECIFICATION................................................................................................................ 6
4.3 INTERNATIONAL CODE & STANDARDS .......................................................................................................................... 6
5.
GENERAL REQUIREMENTS ..................................................................................................... 6
6.
TECHNIQUES OF THICKNESS MEASUREMENT READINGS ............................................... 7
7.
8.
REPORTING AND DOCUMENTATION .................................................................................. 9
PERSONNEL QUALIFICATIONS AND INSTRUMENTS ......................................................10
9.
ATTACHMENTS......................................................................................................................10
APPENDIX 1 - GENERAL GUIDELINE TO PERFORM BASE LINE THICKNESS MEASUREMENT ............................................. 11
APPENDIX 2 - UT BASE LINE INSPECTION FOR PIPING ........................................................................................................ 12
APPENDIX 3 - UT BASE LINE INSPECTION FOR PRESSURE VESSEL ..................................................................................... 13
DOCUMENT NO
BASED LINE THICKNESS
INSPECTION PROCEDURE
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PROCEDURE
REVISION SHEET
REV
DATE
A
17-05-2024
PART OF REVISED
DETAILS
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3 / 13
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1.
FUNCTIONALITY
The Joint Operating Body Pertamina-Medco E&P Tomori Sulawesi (JOB Tomori) will
develop further the Senoro gas field located onshore near the coast of Senoro-Toili Block
on eastern arm of Sulawesi Island, Indonesia.
There are two areas separated by conservation area of Bakiriang, Northern and Southern
area. The initial development of Senoro fields consist of 3 (three) clusters, one Central
Processing Plant (CPP) with 340 MMscfd capacity, one Export Terminal, a 30”-23.7 km sales
gas pipeline, and Gas Metering Stations as “Existing Facilities”, in the northern area.
JOB Tomori has completed the EPC of the North Senoro Facilities and developing South
Senoro Project for maintaining its production level. South Senoro Project consists of Cluster
area, flowline & Trunkline and Modification of existing CPP area.
The new South Senoro clusters consist of three clusters, Cluster#3 (2 wells), Cluster#6 (4
wells) and Cluster#B (2 wells).
The common design is flowlines and trunkline with some part offshore trunkline to
transport the well fluids from the South clusters to the existing CPP Senoro.
Figure 1.1 - Senoro Field, CPP and Pipeline in Senoro Toili Block
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2.
OBJECTIVE
The objective of this document is to describes minimum requirement of Ultrasonic Test
(UT) Base Line Thickness Measurement of all rigid pressure piping and pressure vessels
systems prior the systems put on service during project phase.
3.
DEFINITION AND TERMS
3.1
Definition and Terms
Terms used in this document are defined as follows:
COMPANY
JOB PERTAMINA – MEDCO E&P TOMORI SULAWESI
EPC COMPANY
KSO TIMAS - PRATIWI
Company selected by owner to perform the engineering
SUPPLIER /
detailed, procurement and construction
Supplier / Vendor is defined as the company selected to supply
VENDOR
the equipment and service detailed in this specification. This is
the entity having unit responsibility as defined in the industry
codes and standards
3.2
Abbreviations
ANSI
American National Standards Institute
ASME
American Society of Mechanical Engineers
ASTM
American Society of Testing and Material
ASNT
American Society for Nondestructive Testing
API
American Petroleum Institute
SS
Stainless Steel
DSS
Duplex Stainless Steel
QC
Quality Control
UT
Ultrasonic Test
TML
Thickness Measurement Location
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4.
REFERENCES
4.1
Codes, Standards and References
The following document shall be complied with, unless stated otherwise in this
Standard specification. The latest editions and revisions of each code and/or
specification, as of the contract document date, shall apply, unless otherwise
specifically noted on the Contract Document or approved, in writing, by the
Company.
4.2
Company Standards and Specification
The latest revision of the Company Standard Specifications shall be used.
TOMORI-SPE-P-ES-06-
Project Quality Plan
Q008
4.3
International Code & Standards
Latest revision of International Code and Standard to be referred to:
API 570
Piping Inspection Code: Inspection, Repair, Alteration,
and Rerating of In-Service Piping Systems
5.
API 510
Pressure Vessel Inspection Code: Maintenance
Inspection, Rating, Repair, and Alteration
API 581
Risk Based Inspection Base Resource Document
GENERAL REQUIREMENTS
1)
Baseline Thickness Measurement is required to ensure fabrication and construction
accuracy and to provide MEPG data to monitor corrosion through the life of the
component against specification and or manufacture data record.
2)
The following guidelines define the requirements for obtaining baseline thickness
measurements. The number of thickness measurements, locations, and required
documentation are addressed in this Specification.
3)
This procedure applicable for metallic piping (all size diameters) and pressure vessels,
unless following conditions:
a.
Non-Metallic piping and nonmetallic pressure vessels / equipment’s.
b.
Metallic piping less than 2” diameter.
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4)
c.
d.
Chemicals tanks.
SS/DSS Pipe Material
e.
Pump Casing.
Permanent Inspection windows for insulated include personal protection equipment’s
shall be made during installation refer to TML on the attached drawing with size 15x15
cm2.
5)
6.
General guideline to perform base line thickness measurement, see appendix 1.
TECHNIQUES OF THICKNESS MEASUREMENT READINGS
The following techniques of wall thickness readings shall be undertaken on each piping
component: Reference for 12 o’clock for piping is based on liquid / gas flow (please see
detail reference on report sketch).
Horizontal Pipes
The top-most of horizontal pipes shall be point of 12 o’clock. Clockwise moving should
face the direction where the flow coming from (ref. right-hand screw law).
Figure 6 – 1 Radial rule on Horizontal pipes
This rule is also applicable for angle-position pipes.
Vertical Pipes
Point of 12 o’clock on vertical pipes shall follow their adjacent upstream horizontal pipes.
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Figure 6 – 2 Radial rule on Vertical pipes
Horizontal Equipment’s
The following techniques of wall thickness readings shall be undertaken on each pressure
vessel / equipment’s component:
Reference for equipment is on name plate (please see detail reference on report sketch)
Figure 6 – 3 Horizontal Components: Longitudinal and Radial orientation
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Vertical Equipment’s
Reference for equipment is on name plate (please see detail reference on report sketch)
Figure 6 – 3 Vertical Components: Longitudinal and Radial orientation
7.
REPORTING AND DOCUMENTATION
1.
A Baseline Thickness shall be generated from shop fabrication or construction
drawings or isometric drawing to accurately record the thickness measurements.
2.
All thicknesses shall be recorded on the report (see attachment)
3.
Recorded minimum thickness shall have a mark indicating that the item was verified
to be correct. Point of marking / tagging / naming for piping started from first point
of piping using symbols and follow by clockwise should be marked on the isometric
drawing.
a.
b.
B mean Body of pipe
E mean Elbow of pipe
c.
T mean Tee of connection
d.
C mean Cap
e.
R mean Reducer
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4.
Every point component that has been measured in thickness shall be marked with a
hollow round sticker (donut stickers) and should be maintained until handover to the
Company. These measurement points will be the basis of the next baseline inspection
by the Company Operation Plant to monitor its corrosion rate.
5.
8.
Baseline Thickness harus dibuat dari gambar fabrikasi atau kontruksi atau gambar
isometrik untuk mencatat pengukuran ketebalan secara akurat.
PERSONNEL QUALIFICATIONS AND INSTRUMENTS
1.
All inspection personnel performing the above activities shall be qualified for ASNT
Level II - Thickness Measurements, refer to ASNT TC 1A.
a. This includes all Subcontractor and Sub-supplier personnel performing the task.
b.
It is the responsibility of the Asset Integrity Representative to ensure that all
personnel are qualified and have demonstrated their capability to use the UT
c.
instrument. Performance test for UT technician may require.
NDT Contractor shall submit a written CV and copy of valid certificates to the
Client / User upon request.
2.
NDT contractor shall submit sample of Base Line Thickness Measurement plan, refer
to manufacture / shop drawing for piping and equipment.
3.
NDT Contractor shall submit manufacturer’s information on the instrument to be used
by all UT-Thickness personnel in gathering this data to the Client / User for approval.
Instrument calibration records shall be included in the submitted documents.
a. On coated surfaces, the instrument and transducer will have the capability to
disregard the thickness of the coating.
b.
On uncoated surfaces, a dual type of transducer or digital type instrument can be
used but will require approval from the Purchaser prior to its use.
9.
ATTACHMENTS
Appendix 1 - General Guideline to Perform Base Line Thickness Measurement
Appendix 2 - UT Base Line Inspection for Piping
Appendix 3 - UT Base Line Inspection for Pressure Vessel
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Appendix 1 - General Guideline to Perform Base Line Thickness Measurement
No
Item
Critical Part
12, 3, 6 & 9 clock
1
Piping
Elbow
3 points at tee
face
Pipe Straight
12, 3, 6 & 9 clock
Cap
at least 4 points
measured
2
Horizontal
/vertical pressure
vessel / drum
All elbows, see Attachment 1
All tee joints, see Attachment 1
All piping joints, see Attachment
1
All caps, see Attachment 1
Reducer
12, 3, 6 & 9 clock
All reducer, see Attachment 1
Shell
12, 3, 6 & 9 clock
All pressure vessel, see
Attachment 2
Head-1 (right
side)
12, 3, 6 & 9 clock
All pressure vessel, see
Attachment 2
Head-2 (left side)
12, 3, 6 & 9 clock
All pressure vessel, see
Attachment 2
Nozzles
TML = Thickness Measurement Location
12, 3, 6 & 9 clock
All main outlet and inlet
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Appendix 2 - UT Base Line Inspection for Piping
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Appendix 3 - UT Base Line Inspection for Pressure Vessel
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