PROCUREMENT OF CATHODIC PROTECTION SYSTEM

Design. Supply, installation, TESTING AND COMMISSIONING OF TEMPORARY CATHODIC PROTECTION SYSTEM for Duliajan to IP-1A (Existing SV-02) Pipeline Project to replace existing Pipeline section 16” dia x 55 KM of Duliajan Numaligarh Pipeline.

Survey, Design, detail engineering, Manufacturing, Inspection/FAT (Factory acceptance test), supply, Packing, transportation to site, storage, installation, testing & commissioning of the temporary Cathodic protection system using Mg (Min 5.0 Kg Each) for CP system / Zn galvanic anodes for earth grounding to protect the external surface 3LPE Coated pipeline against corrosion for a design life of minimum 2 year or till commissioning of PCP system as per standard specification enclosed with the tender for temporary cathodic protection system, approved design document, data sheets & drawings. Scope shall also include but not limited to the following for completion of jobs:

Measurement of soil resistivity along the right of way of the main pipeline (At every 500mtr Interval and 1.5, 2.5 & 3.5 mtr depth) & collection of soil & water samples along ROW at depth of 1M, 2M & 3M at every 5 km interval (Min 03 sample at each location) for its chemical & microbial analysis along the pipeline route as per specification for corrosion survey for above pipeline. .

Collection of additional data related to cathodic protection along the right of way of pipeline as per standard specifications for above pipeline..

Design, Detailed Engineering, Preparation of Design Document, Preparation of Test station schedule & Bill of Material as per the corrosion survey & Chemical analysis of Soil / Water samples for Temporary Cathodic Protection system for above pipeline..

Supply, Installation, Testing & commissioning of Test stations (Big Size & Normal Size) weather proof (IP-55) as per specification & enclosed drawings.

Supply, installation, testing & commissioning of one set of spark gap arrestor 100 kA (Solid State) across each insulating joint provided at terminals as per scope of work / specification. The un-protected/above ground pipeline shall be earthed through GI earth electrodes with separate earth pit. The resistance of grounding shall be limited to 2 ohms max.

Earthing of above ground catholically unprotected pipeline at stations/Metering skids etc, the earth electrode shall be 65 mm dia, 4.5 mm thickness & 3000mm long.

Supply, installation, testing & commissioning of external electrical resistance Probe (02 no. ER probe with 1 no. ER probe reading instrument) probes utilizing the electrical resistance technique shall be provided along the pipeline at marshy / vulnerable locations to monitor the external corrosion activity on the pipeline. DS Location of external ER probe shall be decided during detail engineering.

Supply, installation, testing & commissioning of Polarisation coupons each of total area of 100mm x 100mm having one side exposed area of 25 mm x 25 mm without permanent reference cell shall be provided along the pipeline at marshy areas and at vulnerable locations to monitor the external corrosion activity on the pipeline as per enclosed standard specification. Location of external Polarisation coupons & Number of magnetic devices for operation of magnetic switch shall be decided during detail engineering in consultation with client. The works related to collection of approximately 2-5 m of pipeline material (In pieces of 300 to 1000mm length) for fabrication of Polarisation coupons is in the scope of the Contractor.

Supply, laying of HDPE sheets (1200mm wide, 6mm thick) between the pipeline and the other CP protected foreign pipelines at the crossing locations for providing electrical isolation.

Bonding of pipeline with foreign pipeline crossing or parallel run as per the scope of work.

Supplying, laying, termination, Glanding, ferruling & testing of all the cables of TCP system, Cu-Conductor, XLPE insulated, PVC sheathed, Armd/Unrmd (1Cx6 mm2, 1Cx10 mm2, 1Cx25 mm2) as required.

Cable to pipe connection by thermit welding/Pin brazing (for charged pipeline) for 35, 25,10 ,6 sq.mm copper cable including excavation and exposing piping , recoating with epoxy, testing etc.

PSP Monitoring on monthly basis of the TCP system till commissioning of the permanent cathodic protection system or closure of contract, whichever is earlier.

All civil/ structural works related to TCP system including supply of bricks, cement & steel etc. required for completion of the system with other miscellaneous works specified in scope of work.

Description of Work / Item(s)

PCP-SURVEY-Interference study & Simulations

AC-DC interference on pipeline and CP System due to proximity of foreign AC/DC source, AC-DC Interference Detection survey & submission of report with recommended mitigation measures by software modeling as per scope of work.

PCP-SUPPLY ('SUPPLY, INSTALLATION, TESTING AND COMMISSIONING OF PERMANENT CATHODIC PROTECTION SYSTEM FOR for Duliajan to IP-1A (Existing SV-02) Pipeline Project to replace existing Pipeline section 16” dia x 55 KM of Duliajan Numaligarh Pipeline.

Design, Detailed Engineering, Manufacturing, Inspection/FAT (Factory acceptance test), Supply of the permanent cathodic protection system by impressed current method using MMO coated Titanium anodes with backfill, with existing available CPPSM/TR Units, AJB's, CJB's, all interconnecting cables, reference cells, monitoring systems and all other equipments and hardware’s required for completeness of job as specified in specification & PJS etc, to protect the external surface. Pipelines against corrosion for a service life of 35 years, as per Scope of Work, Standard specification, PJS, Design basis, data sheets enclosed & Approved Design Package. The scope shall also for anode ground beds, anode junction boxes and for laying of cables from anode ground beds to CP stations at CP station locations. Design, Detailed Engineering for Permanent Cathodic Protection system as per the corrosion survey, site data collected, scope of work and specifications.

Dismentling & reconnection of cables for Existing CPTR unit -Min. 75V/50A, 6kVA Automatic, Air cooled, Indoor type with remote monitoring through SCADA facility as per the specification at DS, SV-1 & SV -2.

1" dia & 1 M long 8A rating LIDA MMO anode sets for Deepwell/Shallow anode ground bed with petroleum cock bridge & cable joints etc. as per the specification at DS, SV-1 & SV -2.

Junction Boxes

Anode Junction Boxes (IP-55, Weather Proof)

Cathode Junction Boxes (IP-55, Weather Proof)

Bonding Junction Boxes for current drainage (having provision to control the current) for bonding of the foreign pipeline

Permanent Reference Cell

Cu/CuSO4 Permanent Reference cell as per tender drawing

Remote Monitoring of PSP Through GSM service band

Computerized test station Unit (CTSU)

CTSU reader

Central Monitoring server for CTSU

PCP Cables- The Cables shall be annealed high conductivity, stranded copper conductor, 650/1100V grade, XLPE Insulated & PVC Sheathed

1c x 6 mm2 - armoured for potential measurement & Ref Cell

1c x 10 mm2 - un-armoured for anode tail cable (KYNAR Cable)

1Cx 25 mm2- armoured for Bonding/Grounding etc.

1Cx 35 mm2- armoured for Anode & Cathode Header Cable.

3C X 10mm2- armoured for TR/CPPSM unit incomer cable.

Multi-core, FRLS, 1.5 Sqmm, 8/12 pair, twisted pair, armoured, signal cables as per IS/BS for ref cell from CJB to CP unit etc.

Cable to pipe connections by Pin brazing / Thermit welding method for all sizes (Upto 1C x 35mm2)

Recommended Spares for CPTR units as per scope of work

CIPL Survey with Simultaneous PSP data logging (logging duration as per requirement) of pipelines at HT Line crossings & Interference prone area.

Current Attenuation Test Survey (CAT) full length

CAT with "A" Frame or DCVG Survey full length

AC-DC Interference Mitigation & Validation of inteference survey report as per scope of work

Preparation and submission of As-Built drawings/documents including final commissioning report for PCP system, Post commissioning survey, Interference study report.

SILVERLINER INTEGRITY SERVICES (BID ID -248212)

CORROSION TECHNOLOGY SERVICES INDIA PRIVATE LIMITED (BID ID -248429)

CORTIGO TECHNOLOGIES PRIVATE LIMITED (BID ID -248477)

Corrxperts Private Limited (BID ID -249066)

SARK EPC Projects Pvt.Ltd. (BID ID -248456)

UNDTS CORROSION SERVICES PRIVATE LIMITED (BID ID -248490)

SHIVI ENERGY SOLUTIONS PVT LTD (BID ID -248636)

CORTIGO TECHNOLOGIES PRIVATE LIMITED (BID ID -248477)

SILVERLINER INTEGRITY SERVICES (BID ID -248212)

Corrxperts Private Limited (BID ID -249066)

SHIVI ENERGY SOLUTIONS PVT LTD (BID ID -248636)

UNDTS CORROSION SERVICES PRIVATE LIMITED (BID ID -248490)

SARK EPC Projects Pvt.Ltd. (BID ID -248456)

CORROSION TECHNOLOGY SERVICES INDIA PRIVATE LIMITED (BID ID -248429)