Pre Fabrication, Erection and Hooking Up of 1800 mm MS FAT outlet Gas Duct to Stack in SA Plant, FACT-CD during ATA 2022.

Pre Fabrication, Erection and Hooking Up of 1800 mm MS FAT outlet Gas Duct to Stack in SA Plant, FACT-CD during ATA 2022.

Prefabrication of 1800 mm FAT Gas outlet duct to Stack with Mitre Elbow: Collect and transport required materials,tools and tackles for the work. Make necessary site arrangements for the work. Mark and cut 8mm thick MS plate to correct size and grind the inside / outside plate edges properly with suitable bevel / single Vee, where the welding is to be done.The plates shall be rolled / shaped to the required duct size ,1800 mm. Joining / setting the rolled duct pieces properly after correcting the ovality if any, tack / stitch welding to form the required length as per available drawings. Mark,cut, set and fabricate 1 Nos 90 degree mitred elbow, 1800 mm Dia . Full welding the duct pieces , complete / required lengths and join as per instruction and generally as per available drawing to facilitate erection at site. After root weld, all joints shall be DP Tested as per instructions and defects if any shall be repaired as per instructions of Engineer-in - Charge. Necessary erection hook with pad plate, as per standards shall be welded on each piece to facilitate the erection at high altitude site. The ducts and mitre elbows shall be welded with required fillet. All welding joints shall be ground properly. After complete fabrication, clear the site, unused plates and structurals shall be neatly stacked in area earmarked,scrap shall be collected in area earmarked. Approx total length of duct including mitres is 16m. Quantity indicated in the drawing/schedule is approximate. Contactor shall take exact length/measurements at site. Any additional mitre elbows/ducts required to be fabricated shall also be under contractor's scope as per site instructions. Weight taken will be weigh of final finished duct and mitres.

Dismantle Existing 1800mm FAT Outlet Gas Duct to stack,Scrap Collection and Transportation to Scrapyard: Arrange necessary tools and tackles required for the work. Make required site arrangements. Cut and remove existing 1800 mm FAT outlet duct to stack t the tie point/hook up joint as per relevant drawing and site instructions to facilitate erection of new ducts.Necessary temporary supports shall be provided for supporting the other end of duct and also to avoid strain in duct while erection of new ducts. . Unwanted assosiated structurals shall also be dismantled as per instructions. FACT cranes shall be made available for dismantling of ducts and structurals. Dismantled duct shall be transported to the earmarked area/scrapyard as per instruction. Scope of collection,loading/unloading and transporation of dismantled ducts/structurals/any scrap arising out of fabrication and erection of subject work shall be under contractors scope.

Erection of Newly Fabricated 1800mm FAT Gas outlet duct to Stack with Mitre Elbow: Arrange necessary tools and tackles required for the work. Make required site arrangements.Transport the fabricated duct pieces and mitres to worksite.Erect 1800mm gas outlet duct of FAT with mitre elbows as per relevant drawings and site conditionsand hook up to the tie point on to the stack inlet IAT . Final hook up shall be done during ATA 2022 .. Necessary temporary supports shall be provided. The tie point/hook up joint area shall be bevelled before welding. After erection and setting of the duct pieces and mitre elbows, full weld all the fit up joints.All welding joints shall be free from any strain and ovality. Any modifications at site shall be done as per instructions from engineer in charge. After erection and full welding clear the site and transport the scrap to area earmarked.Blinding of open end of ducts shall be carried out where ever necessary as per instuctions after fabricating the end dummies. After erection, all ducts shall be leakproof and leaks if any shall be repaired by contractor at his own cost & risk.

K G SIVANANDAN

M A Shamsudeen

PAREETH V V

BASHEER V P

HASSAN MM

MBM ENGG WORKS