344/247/03/24-25

Amount

E-50:- During DI/DR on Centre Main engine exhaust flap system it has observed that on lagging on the exhaust trunking is perished due to fair wear and tear. Same is cause to increase in temperature of trunking and exhaust flap system. Lagging to be renewed as per sample. In way jobs includes as follows:- (a) Exhaust trunking outer aluminum protection to be renewed entirely including the upper and lower area. (b) The entire trunking to be renewed and cleaned for removal of glue and other debris. (c) The trunking to be checked for any hot spots and if found, same to be cleared by proper welding and checked for leak proof. (d) The surface of the trunking to be prepared for applying adhesive material for trunking which includes buffing the surface for holding of adhesive material. (e) Lagging to be applied on top of trunking after the coating of adhesive material followed by asbestos coating for proper heat insulation. 03 roll of lagging to be placed for proper heat insulation intermediate heat to be placed for provided for grip lagging. (f) After the lagging procedure is over the entire trunking including the bents to be provided with aluminum sheet insulation for proper protection from heat. Exhaust flap system to be for nil obstruction. Any other additional job including brazing,metal renewal of trunking and additional material to be considered and carried out accordingly. All in way jobs to be carried out and proved for satisfactory operation.

E-47:- AC compressor base was observed to be excessive vibration and mountings found to be perished due to fair wear and tear there by affecting the operational capabilities of AC compressor. Further the base metal(material: MS anglers of 5 mm thickness) was observed to be corroded at multiple locations due to condensate formation and metal got perished due to fair wear and tear. In way job includes following : (a) Removal of AC compressor post transferring of refrigerant and its allied pipelines including the condenser unit and sea water lines to be removed and preserved for reinstallation. Condenser unit to be filled with anti corrosive cleaning agent for cleaning, preservation and rust removal if any. (b) The base plate including anglers at various locations to be gauged for thickness s analysis and marked for variations. The perished areas to be properly marked for identification. Post markings analysis of weak links in frame needs to be carried out for better understanding of load distribution and accordingly perished frames to be cut and removed. (c) Post removal of old frames surface preparation including buffing and surface grinding to be carried out for welding of new frames. Dye testing and gauging of surface to be carried out for understanding the holding strength of base structure. The measurement of area to be procurement be calculated and position of compressor to be marked on base plate and anglers for proper positioning of compressor. (d) MS Anglers to be cut as per measurements and same needs to be welded as per drawings for with proper support for load bearing of compressors. Provision of pipeline channeling for compressor inlet outlet and condenser holding alongwith other units to be considered as per drawings and same needs to be catered. Extra material for the same to be taken into consideration. (e) Post structure preparation the same needs to be placed and deviations if any to be corrected for final fitment purpose. The reworking and load checking including seating of compressors and allied lines to be finalized and accordingly markings to be given for final preparation. Post final preparation fitment of frame including base plate to be carried out with welding by class approved welder for joint less welding on base structure for proper strength of frame to ship structure. Dye penetration test to be carried out post fitment for frames on base structure and if found not correct same needs to be reworked. (f) Post fitment of frame mounting of pipelines and condenser units to be carried out and if the pipelines are to be reworked for Accommodating the new frame same needs to be carried out. Pipelines are of material copper and cupronickel. Post fitment of AC units including compressor, refrigerant to be filled and unit to be checked for leakages. All inlay jobs other than this which includes hot work or metal work to be included and system to be proved for satisfactory operation of AC system.

VYAS AND SONS ENTERPRISE (BID ID -3210167)

SHYAM JITENDRA MODHA (BID ID -3210532)

Jitu Enterprise (BID ID -3211267)