NCTPS I SE MI circle R M 23 24 MPM Dn AC plant Reconditioning of released condenser unit in chiller No 01

Amount

Charges for dismantling the both side end covers by removing / cutting the bolt & nuts. Removing all copper tubes 15.8 mm OD, thickness 1.6mm, length 2445 mtr, Qty 161 Nos., cutting and removing the end tube sheet plates at both side size OD 670 mm dia thick 30mm materials MS and baffle sheets. Including consumables & hire charges for T&P’s.

Charges for cleaning of inner & outer surface of shell of condenser by sand blasting, removing all erosions, grinding of welding portion, cleaning of grooves the fixing portions of baffle plates, painting the inner & outer surface of shell by anti corrosive paints, the rates including consumables & hire charges for T&P’s etc., as per the direction of Engineer in charge.

Charges for fixing / welding of tube sheets end plates OD 670mm thick 30 mm Qty 2 Nos material MS after providing tube fixing holes, Qty of holes 322 Nos, dia 18mm by drilling and grooving or reaming as per the direction of engineer in charges. Including consumables & hire charges for T&P’s.

Fixing the end tube sheet plate (2Nos) at both sides OD 670 mm thick 30 mm in condenser shell. Including consumables & hire charges for T&P’s.

Charges for provision of groove on the outer side of copper tubes (OD 15.8 mm length 2445mm) for improving the heat transfer, including consumables & hire charges for T&P’s.

Charges for fixing of tubes 161 Nos OD 15.8 mm thick 1.6 mm in baffle and tube sheet end plates including baffle plates, end plates reaming and testing of tubes as per the direction of Engineer in charges. Including consumables & hire charges for T&P’s.

Charges for fixing the end covers at both sides of the condenser after providing suitable gaskets and fixing the HT bolt & nuts (size 18mm x 80mm) tightening the bolt & nut admitting the Nitrogen gas inside of the shell and special testing for 20 kg /cm2and also admitting the water in the copper tubes total number of 161 Nos. at a pressure 300PSI and kept out checked condition for about 48hours, after confirming the withstanding pressure by N2 gas and water and should be released from the condenser as per the direction of engineer in charge. (The rates including the consumables like Nitrogen gas, T&P hire charges and also pressure testing equipments etc.,).

Finned Copper tube OD 15.8 mm, thick 1.6 mm, length 2445 mm No. of tubes 161 Nos

Tube Sheet end plate material MS, OD 670 mm, Thick 30 mm

HT Bolt size 16 mm X 100 mm

Refrigerant gas 134 a

Lubricant Oil (Polyol ester compressor oil)

Oil Filter

SREE RAGAVENDRA INDUSTRIAL ENGINEERS

ANNAI ENTERPRISES