Chennai Petroleum Corporation Limited Tender

Cogen Stack - Repair jobs

Lumpsum charges: a) For Scaffolding- Providing and erecting of scaffolding system for any/all elevations on the interior side of Cogen Boiler 1/2/3 RCC chimney, The scaffolding shall be erected between two corbels which are 10 m apart in elevation wherever refractory/insulation lining repairs are called for and sufficient material to cover 50% height of the chimney (1520 m2) shall be available at any point of time. b) For fabrication, erection and operation of MS cage arrangement of dia 750 mm hoisted with electrical operated winch arrangement to move through the ventilation opening within the chimney structure upto height of 97 metres (Any holes required in the top RCC platform for fixing the guide ropes shall be made by the contractor) c) For fabrication, erection and operation of 2 nos of MS cage arrangement of dia 750 mm hoisted with electrical operated winch arrangement to move through the individual boiler flue gas stack within the chimney structure upto height of 100 metres (CPCL shall arrange for provision of openings in the bottom metal duct of each stack to allow the cage/platform to move through) d)For erection and operation of exterior cradle system (with 2 nos supspension jib system) of capacity 800 kg and lift height 100 metres, capable of manouvering up and down and along the circumference of the chimney structure.

Removal of entire soot/sediments accumulated within the individual flue stacks through the clean out doors 900x1200 mm at the base and the soot accumulated over the RCC slabs on each corbel within the chimney structure by manual or mechanized means as directed by Inspection/Engineer-in-charge including disposal of accumulated soot to a yard within Refinery complex.