Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 10 CS pipe Flame Cutting , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 20 CS pipe Bevelling , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 30 CS pipe Fitup and Welding , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 40 CS PIPING WORK , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 50 CLAMP OPENINGBOX UP All Sizes , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 60 FABRICATION OF CLAMP UP TO 6 INCH , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 70 FABRICATION OF CLAMP ABOVE 6 INCH , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 80 VALVE DROPPING ERECTION , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 90 Wrapping and Coating Service , Custom Bid for Services - Mechanical piping works in Fire Water and Cooling Water Network in Numaligarh Refinery Ltd item 100 Vehicle monthly charge