procurement of critical piping for dvc koderma and ntpc sipat projects , main steam piping for dvc koderma 2x800 mw unit 3 & 4 , cold reheat piping for dvc koderma 2x800 mw unit 3 & 4 , hot reheat piping for dvc koderma 2x800 mw unit 3 & 4 , boiler feed discharge piping for dvc koderma 2x800 mw unit 3 & 4 , main steam piping for ntpc sipat 1x800 mw , cold reheat piping for ntpc sipat 1x800 mw , hot reheat piping for ntpc sipat 1x800 mw , boiler feed discharge piping for ntpc sipat 1x800 mw , pipe for hp bypass fn assembly for dvc koderma 2x800 mw unit 3 & 4: id200x51 sa335p92, len = 6000 mm , pipe for aprds fn assembly for dvc koderma 2x800 mw unit 3 & 4: od219.1x49 sa335p92, len = 2000 mm , pipe for bfd fn assembly for dvc koderma 2x800 mw unit 3 & 4: od660x97 sa106grc, len = 4000 , pipe for hp bypass fn assembly for ntpc sipat 1x800 mw: id200x51 sa335p92, len = 6000 mm , pipe for aprds fn assembly for ntpc sipat 1x800 mw: od219.1x49 sa335p92, len = 2000 mm , pipe for bfd fn assembly for ntpc sipat 1x800 mw: od660x97 sa106grc, len = 4000