OT No 51 Reconditioning Nozzle ring

Charges for gauging the already welded worn out EN-19 strip plate of size 200 mm x 150 mm x 16 mm thick & cross plate of in between strip plate and levelling the surface by grinding etc…

Charges for Reconditioning and strengthening of existing worn out Nozzle ring by complete cleaning the worn out / Undulance nozzle ring top surface of coal mill, grinding, cutting the EN-19 plate to required size of 200 mm x 150 mm x 16 mm thick, drilling 2 Nos. of 20 mm dia hole over each strip plate for the purpose of internal stress relieving while welding, bending the strip plate at required angle at 100 mm distance for tapper seating over the nozzle surface, U-shape cutting over the strip plate to avoid hindrance to tightening bolts of nozzle ring, pre-heating each nozzle before welding the strip plate for weldability purpose, seating the strip plate over the top of each nozzle ring without gap by heating & hammering, filling weld metal over the undulance surface of nozzle ring below the strip plate, welding the strip plate with nozzle surface by 3 runs using special type welding electrodes, welding the longitudinal eroded/crack portions in between nozzle teeth by using the cut bit of EN-19 flat plate and finally plug welding the stress relieving holes in the strip plate after completion of strip plate welding including the cost of EN-19 plate etc…

Charges for strengthening of existing worn out Nozzle ring by complete cleaning and grinding the worn out / Undulance nozzle ring bottom surface of coal mill, cutting the EN-19 plate to required size of 300 mm x 100 mm x 16 mm thick, drilling 2 Nos. of 20 mm dia hole over each strip plate for the purpose of internal stress relieving while welding, bending the strip plate at 45˚angle at 150 mm distance for tapper seating over the nozzle bottom surface, pre-heating each nozzle bottom surface before welding the 45 degree angle strip plate for weldability purpose, seating the 45˚angle strip plate over the bottom of each nozzle ring without gap by heating & hammering, filling weld metal over the undulance surface of nozzle ring below the 45˚angle strip plate, welding the 45˚ angle strip plate with nozzle surface by 3 runs using special type welding electrodes and finally plug welding the stress relieving holes in the 45˚angle strip plate after completion of strip plate welding including the cost of EN-19 plate etc