procurement of various type of erosion shields for boiler pressure parts of unit no 1 and 2 2x210 mw ph i sgtps mppgcl birsinghpur , straight type erosion shields ( as per drawing / sample ) , economizer tube ( tube size: 38 mm ) ( id=38 . 2; od=42 . 2; length=2000 mm ) , primary super heater middle & top bank tube ( tube size: 51 mm ) ( id=51 . 2; od=55 . 2; length=2000 mm ) , screen / horizontal baffle / primary super heater bottom bank / horizontal re-heater bottom & middle bank tube ( tube size: 63 . 5 mm ) ( id=63 . 7; od=67 . 7; length=2000 mm ) , horizontal re-heater top bank tube ( tube size: 57 mm ) ( id=57; od=63; length=2000 mm ) , erosion shield for economizer tube bends 45o bend ( as per drawing / sample ) , erosion shield for horizontal re-heater bottom & middle bank tube of outer u-bend ( as per drawing / sample )