bids are invited for operation and maintenance of other machines and plants - as per rfq 12045--dismantling of steel structure such as platforms, support railing, hoppers, chutes, ducts, cells dismantling of mech. equipments and elect. equipments/ assemblies including rubber lined pipe line all heights fabrication of steel structures such as platforms, tanks, hoppers, cells, ducts, chutes, chimney, towers support, bend etc. including fixing of rubber lining with bolt erection of fabricated items as in sl no. 2 and also equipments, sub-assemblies, motors, pumps etc. at all heights. laying of old/new ms/ci/gi pipe lines o all classes with welded flanged sockets joints including fabrication of bend, flanges expansion joints etc. connected with the laying of pipe line at all heights pipe line up to 1 1/2 n.b size laying of old/new ms/ci/gi pipe lines o all classes with welded flanged sockets joints including fabrication of bend, flanges expansion joints etc. connected with the laying of pipe line at all heights b) pipe line up to 2 to 4 1/2 n.b size laying of old/new ms/ci/gi pipe lines o all classes with welded flanged sockets joints including fabrication of bend, flanges expansion joints etc. connected with the laying of pipe line at all heights c) pipe 5 to 8 n.b size laying of old/new ms/ci/gi pipe lines o all classes with welded flanged sockets joints including fabrication of bend, flanges expansion joints etc. connected with the laying of pipe line at all heights) pipe 8 1/2 to 12 n.b size laying of old/new ms/ci/gi pipe lines o all classes with welded flanged sockets joints including fabrication of bend, flanges expansion joints etc. connected with the laying of pipe line at all heights e) pipe 12 1/2 to 16n. b size shifting of material and equipment at all heights inside the plants applying priming coat: with ready mixed red oxide zinc chromate primer of approved brand and manufacture on steel galvanized iron/steel works painting with synthetic enamel paint of approved brand and manufacture to give an even shade: two or more coats on new work replacement of complete wear resistant mill liner of ball mill removal of old steel liners of rod & slag mills on shell and head by cutting / opening the bolts, fitting of new liners with rubber gaskets, new bolts, washers & nuts etc. transportation of new liners from central store to work place on contractor scope