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ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
Page
1 of 9
Rev
0
Date
19-01-2014
PROJECT
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
COMPANY
Abu Dhabi Gas Industries Ltd. (GASCO)
EPC CONTRACTOR
TECTON Engineering and Construction LLC
ENG. SUBCONTRACTOR
Tebodin Middle East Ltd.
DOCUMENT NO.
0600466-RT-588-01-002
DOCUMENT REVISION STATUS
Rev- 0
DOCUMENT CLASS
Class-3
Revision and Authorization Record: 0
19-01-2014
Issued for Construction (IFC)
SHE
STN
PP
A
18-11-2013
Issued for Client Review (ICR)
PML
STN
PP
REV
DATE
DESCRIPTION
PRPD
CHKD
APPD
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ENGG. SUBCONTRACTOR
EM
PM
CONTRACTOR
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
Page
2 of 9
Rev
0
Date
19-01-2014
INDEX 1.
PROJECT DESCRIPTION.......................................................3 1.1 Introduction...........................................................................................3 1.2 Project Objective..................................................................................3
2.
SCOPE OF THIS DOCUMENT.................................................3
3.
DEFINITIONS AND ABBREVIATIONS......................................4 3.1 Definitions.............................................................................................4 3.2 Abbreviations........................................................................................5
4.
REFERENCE DOCUMENTS....................................................5 4.1 FEED Drawings....................................................................................5
5.
PURPOSE OF THE VISIT.......................................................5
6.
PARTICIPANTS....................................................................6
7.
AREAS VISITED..................................................................6
8.
SITE SURVEY FINDINGS......................................................7 8.1 Piping/Pipelines....................................................................................7 8.2 Process................................................................................................8
9.
CONCLUSION AND RECOMMENDATIONS...............................8
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
1.
PROJECT DESCRIPTION
1.1
Introduction
Page
3 of 9
Rev
0
Date
19-01-2014
Abu Dhabi Gas Industries Limited (GASCO, hereinafter referred to as “COMPANY”) has been appointed by ADNOC to manage the implementation of a new project to supply Sales Gas to Takreer Norm Project at their BeAAT Plant in Ruwais including:
Tie-in Connection from 52” HRS Pipeline Under Construction;
New scraper launching station close to the Tie-in Point;
New 4” x 2.0 km(Approx) Carbon Steel Sales Gas Pipeline from Tie-in Point to Takreer Norm Plant;
New Consumer Receipt Station (CRS) close to Takreer Norm Plant including scraper receiver, gas filters, custody transfer meter and pressure reduction station.
GASCO has awarded TECTON Engineering and Construction LLC the Contract for EPC works. TECTON Engineering and Construction LLC appointed Tebodin Middle East as Engineering Sub-Contractor for this project.
1.2
Project Objective The objective of this project is to provide sales gas to the Takreer Norm Project at ADNOC’s BeAAT Plant
2.
SCOPE OF THIS DOCUMENT The purpose of this document is to report information gathered during the site visit performed on 29th October 2013 which shall be used as the basic information for developing the project drawings for construction.
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
3.
DEFINITIONS AND ABBREVIATIONS
3.1
Definitions
Page
4 of 9
Rev
0
Date
19-01-2014
COMPANY
Abu Dhabi Gas Industries Ltd (GASCO)
CONTRACTOR
TECTON Engineering and Construction LLC which carries out the design, engineering, procurement, construction, commissioning or management of the PROJECT. CONTRACTOR includes its approved MANUFACTURER(s), VENDOR(s), SUPPLlER(s), and SUBCONTRACTOR(s). Requirements of this specification shall be enforced at all levels of the CONTRACTOR's procurement process. The COMPANY shall have access to all CONTRACTOR SUPPLlER(s) to the same extent as required of CONTRACTOR".
PROJECT
EPC FOR SUPPLY OF SALES GAS TO TAKREER NORM PROJECT AT BeAAT RUWAIS PLANT
CONTRACT
The contract between TECTON Engineering and Construction LLC Tebodin Middle East for PROJECT “EPC FOR SUPPLY OF SALES GAS TO TAKREER NORM PROJECT AT BeAAT RUWAIS PLANT”
PMTC
COMBINED PROJECT MANAGEMENT TEAM (PMTC) – The COMPANY – authorized party responsible for overall day-to-day execution of the PROJECT, consisting of COMPANY and Project Management Consultancy (PMC) personnel. PMTC is to serve as liaison between COMPANY and the CONTRACTOR(s) on the PROJECT
SUBCONTRACTOR includes suppliers and VENDORS and means any and all persons, firms, partnerships, companies or a combination thereof (not being employees of CONTRACTOR) of any tier to whom any part of the WORK has been subcontracted by CONTRACTOR or SUBCONTRACTORS (including any contracts novated or assigned by COMPANY to CONTRACTOR) and the successors and assigns of such persons, firms, partnerships, companies or a combination thereof TEBODIN
Tebodin Middle East Ltd. (Engineering SUBCONTRACTOR appointed by CONTRACTOR)
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
3.2
5 of 9
Rev
0
Date
19-01-2014
Abbreviations ADNOC
Abu Dhabi National Oil Company
FEED
Front End Engineering Design
HRS
Habshan-Ruwais-Shuweihat
CRS
Consumer Receipt Station
ROW
Right Of Way
4.
REFERENCE DOCUMENTS
4.1
FEED Drawings Drawing No.
5.
Page
Title
600466-588-A1-5-001
:
Overall Pipeline Route Map
600466-588-A1-5-102
:
Plot Plan 4” Scraper Area
600466-588-A1-5-005
:
Pipeline Corridor Crossing Detail
600466-588-A1-0-001
:
Process Flow Diagram
600466-588-A1-0-012
:
Piping and Instrumentation Diagram
PURPOSE OF THE VISIT The following are the purpose of this site visit:
To identify and locate the tie in facility constructed by other contractor
To check the plot location of new Pig Launcher and Receiver Station according to FEED Drawings
To check various crossings according to the preliminary information provided in FEED drawings along the proposed pipeline route
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
6.
6 of 9
Rev
0
Date
19-01-2014
PARTICIPANTS Sr. No.
COMPANY
Discipline
Name
1
EIL-PMTC
E&I
Satyajit Mohapatra
2
Veloci-PMTC
Civil
Manzoor
Process
Swaminathan
Piping/Pipeline
Satish
5
Instrumentatio
Devanand
6
Electrical
Sheikh Hassan
Piping/Pipeline
Stanly Thomas
Process
Sunil Singh
3 4
7
Tecton
Tebodin
8
7.
Page
AREAS VISITED Sl. No.
Site
1
Tie in location of 4” pipeline on 52” HRS Pipeline
2
Plot Location of Pipeline Launcher
3
Pipeline Crossings
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
8.
SITE SURVEY FINDINGS
8.1
Piping/Pipelines
Page
7 of 9
Rev
0
Date
19-01-2014
Tie In Location The tie in location of 4” Pipeline is located at approximate chainage of 96+668 m on HRS Pipeline. The location has been fenced by the EPC contractor of HRS Pipeline. Visual inspection of the tie in location has been carried out and compared with the FEED drawings referred in section 4.1. It was observed that the different piping arrangement has been constructed by the HRS Pipeline contractor at tie in location. According to the FEED drawings, 4” pipe shall be vertically tied in and double block valve arrangement shall be provided along the axis (East Direction) of HRS pipeline. But as per site condition, vertical tie in is provided with 4” off take but the complete double block arrangement is provided in the true south direction resulting in consumtion of more space up to the fenced limit of tie in. The above scenario is entirely different from the FEED drawings. With the above site condition, the constructability of crossing is to be studied. To visualise the site scenario, a free hand sketch of existing site condition at tie in point is attached as SKETCH-1. Also, as per the FEED drawing “ Pipeline Corridor Crossing Detail” (Drawing No. 600466-588A1-5-005) shows the track in between Existing 42” Gas Pipeline and 52” HRS Pipeline, but as per site observations there is no motorable track between these two pipelines Scraper Launcher Plot Location The tentative location of Scraper Launcher Station has been visually inspected with reference to the tie in point. It was observed that the launcher station falls in sabkha area. The pipeline approach area has been physically verified and observed as clear of any obstructions. Pipeline Route According to the FEED Alignment Sheet drawing number 600466-588-A1-5-002, the initial part of the pipeline route has been verified and looks clear of any obstruction including station approach. In between IP-02 to IP-03, two track crossings have been identified as indicated in the Alignment Sheet. There are no pipeline markers or cable markers available in order to visually locate the water pipeline and Etisalat buried telephone cable. Detailed topo survey is required, in order to identify these existing underground facilities. The fence after IP-03 parallel to which the new 4” Pipeline will be routed has been identified. Since, there was no ROW along the existing fence; hence the complete route survey up to Receiver Station was not possible. /var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
Page
8 of 9
Rev
0
Date
19-01-2014
Scraper Receiver Plot Location As explained above, the physical approachability of Scraper Receiver Station was not possible due to the unavailability of any existing ROW. Tentative location of the Scraper Receiver Location has been visualised compared to the FEED drawings.
8.2
Process The tie-in point at 52” (HRS) gas pipeline was verified with the FEED P&ID (600466-588-A10-012). The P&ID shows existing 4” tapping with double block & bleed arrangement for taking a tie-in. At site, 4” tapping was provided on the 52” line with two blocks isolation valves with drain in between the isolation valves which is in line with the P&ID (except the drain v/s bleed). The isolation valves are horizontally placed & the drain line was extended near to the grade level. The PID indicates both the existing isolation valve as LOCKED OPEN (LO) however the project execution was still in progress and the valves handles were not in position, so this requirement could not be ascertained. Also considering the gas pipe, the provision of drain valve instead bleed valve is not clearly understood.
9.
CONCLUSION AND RECOMMENDATIONS With the initial site survey, following are the conclusions and recommendations for the project
The tie in piping with 52 Inch HRS pipeline needs modification for the constructability of 4” Sales Gas Pipeline. A tentative proposal shall be worked out.
The existing piping arrangement at tie in is provided with drain arrangement without a 2” valve as the construction was in progress.
The fenced tie in location needs modification. The access gate is provided in between the berm of two pipelines .i.e. between the 42 inch Gas Pipeline and 52 inch HRS Pipeline. Hence, the access gate of the tie in fenced area is recommended to be relocated to the North side in order to provide direct access from the existing track.
The initial crossing of the pipeline is a challenging task. The construction methodology to be followed for the crossing of these existing pipelines after tie in point in Sabkha area shall be studied.
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
Page
9 of 9
Rev
0
Date
19-01-2014
It was observed that temporary wooden support arrangement was in place for the tie in piping. Cast for pedestal of permanent support was observed at site.
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
Page
1 of 9
Rev
0
Date
19-01-2014
PROJECT
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
COMPANY
Abu Dhabi Gas Industries Ltd. (GASCO)
EPC CONTRACTOR
TECTON Engineering and Construction LLC
ENG. SUBCONTRACTOR
Tebodin Middle East Ltd.
DOCUMENT NO.
0600466-RT-588-01-002
DOCUMENT REVISION STATUS
Rev- 0
DOCUMENT CLASS
Class-3
Revision and Authorization Record: 0
19-01-2014
Issued for Construction (IFC)
SHE
STN
PP
A
18-11-2013
Issued for Client Review (ICR)
PML
STN
PP
REV
DATE
DESCRIPTION
PRPD
CHKD
APPD
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ENGG. SUBCONTRACTOR
EM
PM
CONTRACTOR
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
Page
2 of 9
Rev
0
Date
19-01-2014
INDEX 1.
PROJECT DESCRIPTION.......................................................3 1.1 Introduction...........................................................................................3 1.2 Project Objective..................................................................................3
2.
SCOPE OF THIS DOCUMENT.................................................3
3.
DEFINITIONS AND ABBREVIATIONS......................................4 3.1 Definitions.............................................................................................4 3.2 Abbreviations........................................................................................5
4.
REFERENCE DOCUMENTS....................................................5 4.1 FEED Drawings....................................................................................5
5.
PURPOSE OF THE VISIT.......................................................5
6.
PARTICIPANTS....................................................................6
7.
AREAS VISITED..................................................................6
8.
SITE SURVEY FINDINGS......................................................7 8.1 Piping/Pipelines....................................................................................7 8.2 Process................................................................................................8
9.
CONCLUSION AND RECOMMENDATIONS...............................8
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
1.
PROJECT DESCRIPTION
1.1
Introduction
Page
3 of 9
Rev
0
Date
19-01-2014
Abu Dhabi Gas Industries Limited (GASCO, hereinafter referred to as “COMPANY”) has been appointed by ADNOC to manage the implementation of a new project to supply Sales Gas to Takreer Norm Project at their BeAAT Plant in Ruwais including:
Tie-in Connection from 52” HRS Pipeline Under Construction;
New scraper launching station close to the Tie-in Point;
New 4” x 2.0 km(Approx) Carbon Steel Sales Gas Pipeline from Tie-in Point to Takreer Norm Plant;
New Consumer Receipt Station (CRS) close to Takreer Norm Plant including scraper receiver, gas filters, custody transfer meter and pressure reduction station.
GASCO has awarded TECTON Engineering and Construction LLC the Contract for EPC works. TECTON Engineering and Construction LLC appointed Tebodin Middle East as Engineering Sub-Contractor for this project.
1.2
Project Objective The objective of this project is to provide sales gas to the Takreer Norm Project at ADNOC’s BeAAT Plant
2.
SCOPE OF THIS DOCUMENT The purpose of this document is to report information gathered during the site visit performed on 29th October 2013 which shall be used as the basic information for developing the project drawings for construction.
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
3.
DEFINITIONS AND ABBREVIATIONS
3.1
Definitions
Page
4 of 9
Rev
0
Date
19-01-2014
COMPANY
Abu Dhabi Gas Industries Ltd (GASCO)
CONTRACTOR
TECTON Engineering and Construction LLC which carries out the design, engineering, procurement, construction, commissioning or management of the PROJECT. CONTRACTOR includes its approved MANUFACTURER(s), VENDOR(s), SUPPLlER(s), and SUBCONTRACTOR(s). Requirements of this specification shall be enforced at all levels of the CONTRACTOR's procurement process. The COMPANY shall have access to all CONTRACTOR SUPPLlER(s) to the same extent as required of CONTRACTOR".
PROJECT
EPC FOR SUPPLY OF SALES GAS TO TAKREER NORM PROJECT AT BeAAT RUWAIS PLANT
CONTRACT
The contract between TECTON Engineering and Construction LLC Tebodin Middle East for PROJECT “EPC FOR SUPPLY OF SALES GAS TO TAKREER NORM PROJECT AT BeAAT RUWAIS PLANT”
PMTC
COMBINED PROJECT MANAGEMENT TEAM (PMTC) – The COMPANY – authorized party responsible for overall day-to-day execution of the PROJECT, consisting of COMPANY and Project Management Consultancy (PMC) personnel. PMTC is to serve as liaison between COMPANY and the CONTRACTOR(s) on the PROJECT
SUBCONTRACTOR includes suppliers and VENDORS and means any and all persons, firms, partnerships, companies or a combination thereof (not being employees of CONTRACTOR) of any tier to whom any part of the WORK has been subcontracted by CONTRACTOR or SUBCONTRACTORS (including any contracts novated or assigned by COMPANY to CONTRACTOR) and the successors and assigns of such persons, firms, partnerships, companies or a combination thereof TEBODIN
Tebodin Middle East Ltd. (Engineering SUBCONTRACTOR appointed by CONTRACTOR)
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
3.2
5 of 9
Rev
0
Date
19-01-2014
Abbreviations ADNOC
Abu Dhabi National Oil Company
FEED
Front End Engineering Design
HRS
Habshan-Ruwais-Shuweihat
CRS
Consumer Receipt Station
ROW
Right Of Way
4.
REFERENCE DOCUMENTS
4.1
FEED Drawings Drawing No.
5.
Page
Title
600466-588-A1-5-001
:
Overall Pipeline Route Map
600466-588-A1-5-102
:
Plot Plan 4” Scraper Area
600466-588-A1-5-005
:
Pipeline Corridor Crossing Detail
600466-588-A1-0-001
:
Process Flow Diagram
600466-588-A1-0-012
:
Piping and Instrumentation Diagram
PURPOSE OF THE VISIT The following are the purpose of this site visit:
To identify and locate the tie in facility constructed by other contractor
To check the plot location of new Pig Launcher and Receiver Station according to FEED Drawings
To check various crossings according to the preliminary information provided in FEED drawings along the proposed pipeline route
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
6.
6 of 9
Rev
0
Date
19-01-2014
PARTICIPANTS Sr. No.
COMPANY
Discipline
Name
1
EIL-PMTC
E&I
Satyajit Mohapatra
2
Veloci-PMTC
Civil
Manzoor
Process
Swaminathan
Piping/Pipeline
Satish
5
Instrumentatio
Devanand
6
Electrical
Sheikh Hassan
Piping/Pipeline
Stanly Thomas
Process
Sunil Singh
3 4
7
Tecton
Tebodin
8
7.
Page
AREAS VISITED Sl. No.
Site
1
Tie in location of 4” pipeline on 52” HRS Pipeline
2
Plot Location of Pipeline Launcher
3
Pipeline Crossings
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
8.
SITE SURVEY FINDINGS
8.1
Piping/Pipelines
Page
7 of 9
Rev
0
Date
19-01-2014
Tie In Location The tie in location of 4” Pipeline is located at approximate chainage of 96+668 m on HRS Pipeline. The location has been fenced by the EPC contractor of HRS Pipeline. Visual inspection of the tie in location has been carried out and compared with the FEED drawings referred in section 4.1. It was observed that the different piping arrangement has been constructed by the HRS Pipeline contractor at tie in location. According to the FEED drawings, 4” pipe shall be vertically tied in and double block valve arrangement shall be provided along the axis (East Direction) of HRS pipeline. But as per site condition, vertical tie in is provided with 4” off take but the complete double block arrangement is provided in the true south direction resulting in consumtion of more space up to the fenced limit of tie in. The above scenario is entirely different from the FEED drawings. With the above site condition, the constructability of crossing is to be studied. To visualise the site scenario, a free hand sketch of existing site condition at tie in point is attached as SKETCH-1. Also, as per the FEED drawing “ Pipeline Corridor Crossing Detail” (Drawing No. 600466-588A1-5-005) shows the track in between Existing 42” Gas Pipeline and 52” HRS Pipeline, but as per site observations there is no motorable track between these two pipelines Scraper Launcher Plot Location The tentative location of Scraper Launcher Station has been visually inspected with reference to the tie in point. It was observed that the launcher station falls in sabkha area. The pipeline approach area has been physically verified and observed as clear of any obstructions. Pipeline Route According to the FEED Alignment Sheet drawing number 600466-588-A1-5-002, the initial part of the pipeline route has been verified and looks clear of any obstruction including station approach. In between IP-02 to IP-03, two track crossings have been identified as indicated in the Alignment Sheet. There are no pipeline markers or cable markers available in order to visually locate the water pipeline and Etisalat buried telephone cable. Detailed topo survey is required, in order to identify these existing underground facilities. The fence after IP-03 parallel to which the new 4” Pipeline will be routed has been identified. Since, there was no ROW along the existing fence; hence the complete route survey up to Receiver Station was not possible. /var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
Page
8 of 9
Rev
0
Date
19-01-2014
Scraper Receiver Plot Location As explained above, the physical approachability of Scraper Receiver Station was not possible due to the unavailability of any existing ROW. Tentative location of the Scraper Receiver Location has been visualised compared to the FEED drawings.
8.2
Process The tie-in point at 52” (HRS) gas pipeline was verified with the FEED P&ID (600466-588-A10-012). The P&ID shows existing 4” tapping with double block & bleed arrangement for taking a tie-in. At site, 4” tapping was provided on the 52” line with two blocks isolation valves with drain in between the isolation valves which is in line with the P&ID (except the drain v/s bleed). The isolation valves are horizontally placed & the drain line was extended near to the grade level. The PID indicates both the existing isolation valve as LOCKED OPEN (LO) however the project execution was still in progress and the valves handles were not in position, so this requirement could not be ascertained. Also considering the gas pipe, the provision of drain valve instead bleed valve is not clearly understood.
9.
CONCLUSION AND RECOMMENDATIONS With the initial site survey, following are the conclusions and recommendations for the project
The tie in piping with 52 Inch HRS pipeline needs modification for the constructability of 4” Sales Gas Pipeline. A tentative proposal shall be worked out.
The existing piping arrangement at tie in is provided with drain arrangement without a 2” valve as the construction was in progress.
The fenced tie in location needs modification. The access gate is provided in between the berm of two pipelines .i.e. between the 42 inch Gas Pipeline and 52 inch HRS Pipeline. Hence, the access gate of the tie in fenced area is recommended to be relocated to the North side in order to provide direct access from the existing track.
The initial crossing of the pipeline is a challenging task. The construction methodology to be followed for the crossing of these existing pipelines after tie in point in Sabkha area shall be studied.
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
ABU DHABI GAS INDUSTRIES LTD. (GASCO) EPC Contractor
EPC for Supply of Sales Gas to TAKREER NORM Project at BeAAT Ruwais Plant
Document Number
Document Title
0600466-RT-588-01-002
SITE VISIT REPORT
Page
9 of 9
Rev
0
Date
19-01-2014
It was observed that temporary wooden support arrangement was in place for the tie in piping. Cast for pedestal of permanent support was observed at site.
/var/www/apps/conversion/tmp/scratch_1/272256444.docx
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