bids are invited for repair, maintenance, and installation of plant/ systems/equipments (version 2) - commercial; substation; service provider-check the n2 gas leakage, opening of nifps manifold assembly/nrv valve & rectified the gas leakage problem and after rectified n2 gas leakage problem check the healthiness of nitrogen injection fire protection system (vendere make) on 500mva ict-ist(bhel make) at 400kv substation sarojini nagar, lucknow including dismantling /erection of nitrogen cylinder from nifps system. refilled cylinder provided by the department. all men and t&p shall be provided by contractor at his own cost.