notice inviting limited e-tender for lining up contract for mechanical jobs in lpgv , hpgv regenerator and gv absorber in ammonia plant during shutdown at rcf thal . , group 1 : gv absorber and lpgv , opening & box up of manhole 24 300 part a of gv absorber , opening & box up of manhole 30 300 part a of gv absorber , removal , repair , reinstallation of demister part b of gv absorber , skilled work men for redistributor wire mesh repair part c of gv absorber , unskilled work men for redistributor wire mesh repair part c of gv absorber , unskilled helper for removal packing part c of gv absorber , opening and box up of m/h covers of lpgv , group 2 : hp regenerator , repair of gallery per inch of welding of hp regenerator , removal , cleaning , rectification , re-installing demister segment of hp regenerator , opening & box up of 24150# manhole cover of hp regenerator , opening & box up of 36150# manhole cover