Steel pipeline laying and Connectivity of Online CNG Stations under Thrissur and Palakkad GA

Laying Works: In Soft Soil Loading, Unloading material from CGS ,Excavation, trenching, pipe line laying, welding, Radiography (100%), joint coating, lowering, laying of warning mat, hydro testing, pipe line cleaning , swabbing, site restoration, installation of route marker (as per norms of PNGRB), submission of as built drawing and pipe book , testing and commissioning including Nitrogen Purging.

MATERIAL - "Receiving and taking over" as defined in the specifications, handling, loading, transportation and unloading of Owner supplied 3-Layer PE coated pipes & fittings from Owner's designated stack-yard to Contractor's stock yard/ workshop/ work-site. Execution of preliminary activities, preparation of drawings, wherever required for crossing etc. including handling, stacking, stringing on the pipeline in Right-of-Use/ pipeline route alignment. Carrying out inspection of company supplied materials including line pipes at the time of taking over, laying/ installation of coated line pipes, associated buried valves, flanges, Tees & fittings of all sizes. Making availability of additional lands required for Contractor's storage, fabrication, access for construction etc. Procurement and supply of all materials (except Owner supplied materials), consumables, equipment, labour and other inputs. Carrying out all temporary, ancillary, auxiliary works required for ready for commissioning of pipeline as per drawings, specifications, codes, PNGRB regulations, T4S, other provisions of Contract document and instructions of Engineer I/C, including but not limited to carrying out the following works:

SURVEY - Surveying of route and detours required at the time of execution including marking the same in topographical sheet, preparation of construction drawings showing survey details, and submit same to Owner for review/ approval.

ROU - Clearing, Grubbing, Grading & Raking up of all kind of surface of any type including plants (excluding forest plants & trees which shall be under DFO/ Concerned Authority Instructions), shrubs, metal, concrete, bituminous, tiled, brick lined, soft rock etc. All tiles/ slabs/ curb stones etc. removed during excavation shall be placed properly. Any type of rake up surface to be restored to its original position.

TRENCHING - Trenching to all depths by excavation in all types of terrain/ strata including soft/ hard rock and various type of pavement/ footpath/ roads etc. including rock breaking, chiselling or otherwise cutting, excavation etc. as required and storing excavated soil, reusable materials at designated area as directed by Engineer in charge & as per the relevant standard/ specification etc. The minimum depth of the trench for laying of Steel pipeline shall be 1.5 - 2 Mtrs. (as directed by Authority/E-I-C) measured from lowest available datum level adjacent to the trench or the periphery of the pipeline route. The depth may increase accordingly at places as per site condition or as per SCC/ OISD-141/ OISD- 226, PNGRB T4S, ASME Codes etc. whichever is higher. Clearing the bottom of trench by removing boulder, pebbles, etc. Undertaking proper safety measures, installing side plates/bracing etc. for protection of trench sides from collapsing. Dewatering of trenches to be done properly and no extra soil to be left over on roads/site. Excavation required for preparation of Tie-In Pits is covered in this item. No extra/separate claims/payments under any clause/condition shall be made.

WELDING & NDT – Checking, cleaning, aligning, bending, cutting and bevelling (if required) of pipes for welding and field adjustments including pipe fittings, welding, carrying out non-destructive testing of welds as required including 100% radiography by X-ray for Mainline welding & Gamma-Ray for Tie-In Joints of lowered section (in trench) only and providing all requisite equipment, labour, supervision, materials, films, consumables, all facilities and personnel to process, develop, examine and interpret radiographs and other tests as required, carrying out repairs of weld joints found defective by Engineer-in-Charge, carrying out re- radiography and other tests as required on repaired joints. All tieing-in, including the tie-in(s) of the pipeline with the adjacent sections of pipeline including cutting of test header, rebevelling as required, radiography and other NDT examination, joint coating as per specification.

COATING - Coating of field weld joints, bends, elbows, buried fittings and valves etc. including supply of coating materials etc. (i.e. heat shrinkable sleeves and high build epoxy etc.) as per Technical Specification compatible with 3 layer PE coating material of the line pipe. Carrying out repairs of pipe defects/ replacement in case of irreparable defects and repairs of defects of pipe coating not attributable to Owner including defects/ damages occurring during transportation/ handling.

LOWERING & BACKFILLING - Installation/ lowering the pipeline in trench to required depth, supply and placement of PE warning mat Anti-Rodent type as per approved specifications over the pipeline along the complete route, padding around pipeline with suitable approved soil including supply of padding material, backfilling with available & borrowed earth (if required), approved excavated material and/or other suitable soil by crowning. Supply and installation of slope breakers, wherever required or, as directed by Owner, Engineer–in–charge. Supply and installation of bank protection along with backfill materials duly approved by EIC for pipeline trench and banks falls under minor water body crossing as per technical specification & Std. Drg., wherever required or, as directed by Owner/ EIC. Training and diversions of streams in steep slope area, wherever required. Supplying and filling coarse sand under floors, in foundations, floor, trenches, plinth etc. including cost-of sand, royalty, transportation, loading, unloading, spreading in layers not exceeding 20 cm., watering, ramming, compacting, dressing and levelling etc. complete in all respects inclusive of cost of all labour, materials, tools, tackles etc. as per drawings, specifications and direction of E-I-C.

RESTORATION - Supply and installation of construction markers (RCC Markers - to be installed at a distance of 50 mtr through out of pipeline), clearing, fencing, grubbing, cutting of trees, full filling all the requirements of various statutory/ environment authorities to the entire satisfaction of concerned authorities, grading of work area. Shifting of all obstruction within the ROU/ Pipeline route alignment viz. electrical lines/ poles, telephone line/ poles, etc. coordination with concerned authorities and obtain permissions from these authorities. Final clean- up of right-of-use or area disturbed by contractor during their construction activities for laying of pipeline works and disposal of debris and surplus material to designated disposal areas and backfilling of trench and compaction of the same as per satisfaction of Owner and / Or as directed by Engineer I/C.

TESTING - Carrying out air cleaning, pigging, flushing, cleaning and hydrostatic testing of complete pipeline as per specification and approved by Engineer I/C to specified pressures indicated elsewhere and duration after stabilization as per specification, providing all equipment, pumps, fittings, instruments, dead weight tester, pressure recorder, thermocouples etc., and services, supervision, labour, consumables, water etc. as required and approved by Engineer I/C.