bids are invited for pipeline laying installation by open trench method - laying of 100 mm x 6 point 4 mm 4 inch api 5l gr x 52 external 3lpe coated by open cut method , pipeline laying installation by hdd without casing - laying of 100 mm x 6 point 4 mm 4 inch api 5l gr x 52 external 3lpe coated by hdd method , long radius bends 300 class 90 degree - supply of long radius bends r 3d for 4 inch dia pipe x 52 thickness 6 point 4 mm 4 inch nb material api 5l x 52 astm a 860 wphy 52 minimum thickness 6 point 4 mm , purging and inertisation of 4 inch pipeline including supply of nitrogen - purging and inertisation of 4 inch pipeline section up to 2 barg , hot tapping works - 12 inch x 4 inch with split tee 300 class , tcp work - sacrificial anodes pre packed magnesium anodes , supply laying termination glanding and ferruling tcp cables - 1 core x 6 mm2 anode tail cable unarmored , supply laying termination glanding and ferruling of tcp cables - 1 core x 6 mm2 potential measurement tlp to pipeline armored , supply laying termination glanding and ferruling tcp cable - 1 core x 10 mm2 current measurement cable and pipeline to test station armored , supply laying termination and glanding and ferruling tcp cable - 1 core x 25 mm2 bonding earthing surge diverter ht line etc , tlp test stations - new test stations normal size all weather proof with ip 55 , pipeline laying installation of above ground pipeline , pipeline laying installation of above ground pipelines , pipeline laying and installation of above ground pipeline , supply of assorted pipe fittings and flanges , supply of assorted pipe fittings and flange , supply of assorted pipe fittings flanges , flanges - supply weld neck b 16 point 5 a105 charpy 125 aarh rf , supply and installation of 90 degree elbow r 1 point 5d rating 300 class - 4 inch nb material api 5l x 52 astm a 860 wphy 52 minimum thickness 6 point 4 mm , supply and installations of 90 degree elbow r 1 point 5d rating 300 class , sockolet a105 sw , uneq