tender for development of compressor station at rupkhelia supply installation and commissioning of closed drain tank , supply of closed drain tank at rupkhelia compressor station , supply of horizontal, cylindrical, underground inside pit, saddle mounted closed drain tank of capacity 4.18 m3 with inlet size of 6” nb, ansi rating 150#, with blind/mounted flanges for nozzles as required as per tender specification, attached p&id, data sheets and technical specifications etc. , gaskets for all flange joints as mandatory spares , fasteners for all flange joints as mandatory spares 20% (min. 04 nos. of each size & type) , gaskets for all flange joints as pre-commissioning & commissioning spares , fasteners for all flange joints as pre-commissioning & commissioning spares 10% (min. 02 nos. of each size & type) , supervision during pre-commissioning & commissioning per diem rate of item no. 1.