tender for aannual rate contract for the dismantling, fabrication & erection of valves, repairing/ strengthening of worn out ms building/mills columns, ms & gi pipe lines (all sizes i.e. tubewell, molasses etc. ) on labour rate. , dismantling of valves (globe, sluice, angle, butterfly valves & nrv , upto 6 dia , 7 dia to 12 dia , erection of valves (globe, sluice, angle, butterfly valves & nrv , upto 6 dia , 7 dia to 12 dia , dismantling & erection of ms fabricated angle & globe valves , size : 300 mm , size : 400 mm , size : 500 mm , size : 600 mm , size : 700 mm , size : 800 mm , size : 900 mm , size : 1000 mm , size : 1100 mm , size : 1200 mm , size : 1300 mm , dismantling, fabrication, erection jobs related to repairing/ strengthening of worn-out ms building/mills columns , dismantling, fabrication, erection jobs related to repairing/ strengthening of worn-out ms building/mills columns , dismantling, fabrication & erection of underground ms & gi pipeline (all sizes) i.e. tubewell, molasses etc. , dismantling , fabrication , erection