Fabrication and Erection of Dryer Cyclone A in NP Plant FACT CD, during ATA 2020.

Fabrication and Erection of Dryer Cyclone A in NP Plant FACT CD, during ATA 2020.

Pre fabrication of Dryer Cyclone A in NP Plant before ATA 2020. Work Involves: The required MS materials for the fabrication of new Dryer Cyclone A shall be transported from CD stores to work site. The measurements for the fabrication shall be taken from site / existing one and shall be generally as per original Drg. No. C20639-02 R1 dated 12.04.72 from M/s. Buell Engineering Co. INC. The new Dryer Cyclone shall be fabricated with all its inlet / outlet / required connecting flanges etc., as per the same dimensions, sizes and shapes of existing one, for proper / convenient erection. [The plate thickness of Cyclone shall be 06 mm to 10 mm.]. Fixed / loose flange arrangements shall be fabricated with plates for all flanged connections. Required pad plates / supports / stiffeners shall be provided / welded to all connecting flanges, manholes, etc. Full weld all joints with proper fillet as per Arc welding procedure. Inside / outside edges of the cut plate shall be ground properly with suitable bevel / single Vee, where the welding is to be done. The welding of joints shall be done with full-penetration fillet weld and the root-pass shall be DP tested. (Total weight of the Cyclone= 2 MT [Approx.]).

Replacement of Dryer Cyclone A in NP Plant during the ATA 2020 period. Work involves: The required scaffolding, tools, tackles etc. shall be arranged at site, for the replacement of Dryer Cyclone A in NP Plant during ATA 2020.The old Cyclone shall be removed and transported to scrap yard after cutting the same into number of pieces for easy handling. Temporary supports shall be provided, if required. The newly pre fabricated Cyclone shall be transported to site and erect the same in position with proper / strong base support. The alignment, level, verticality etc. shall be corrected perfectly. All the flange joints shall be tightened properly and put the cyclone in service without any leak. (Total weight of the Cyclone= 2 MT [Approx.]).

Repair / Encasing works of Dust Separation system [Dryer & Cooler] on the Top Floor of NP Plant during ATA-2020: Collection and transportation of MS / SS Plates and required materials from CD-Stores. Necessary site arrangements including scaffolding shall be done. Cutting and removal of the damaged portion / weak areas of Various Ducts, Vessels and Cyclones of Dust Separation system [Dryer & Cooler] on the Top Floor of NP Plant shall be done properly to meet the site requirement & as per instruction. Fabrication of new pieces from MS / SS plates, attaining the fit up after proper edge preparation by grinding, Encasing the weak portions with additional plates and full welding of the joints to meet the site requirement shall be in the scope of the contractor. MS / SS plates shall be fabricated in line with the existing profile and symmetry as per the instruction of Engineer in Charge. Patch work / encasing will have to be carried out at all area and elevations as required. After the successful completion of work, the site shall be cleaned properly, dismantle the scaffolding and the scrap material is to be transported to the scrap yard.

Fabrication / welding of MS structural support / stiffeners. work Involves: The materials, tools and tackles for the fabrication / welding of stiffeners of MS angles / channels structural supports etc. shall be transported to site. The required stiffeners of MS angles / channels shall be welded on the out side surface area / body of the fabricated Cyclone. If required, the structural supports for ducts shall be strengthened / repaired.

PAREETH V V

BABY B

VIKRAMAN NAIR S