bids are invited for removal of chokingreplacement rerouting of impulse lines , attending of leakages from air lines , replacement new erection of instrument fitting adopter , cleaning and blowing by air of impulse pipelines , repairing of junction boxes , servicing and recalibration of fuzi yokogava rosemount tx , servicing testing and calibration of temperature switch , servicing testing and calibration of pressure switch , replacement new erection of pressure gauge temp gauges , replacement new erection overhauling union isolating valve , fabrication repairing of instruments platform , changing spindle gland of root valve , laying patrolling of instrumentation cable total quantity : 2656