Overhauling of Boiler Pressure Part Burner valve of unit 6

Amount

PART-A: RATES TO BE QUOTED FOR MAIN SCOPE OF WORK

Erection and Dismantlement of Cup Locks Scaffolding (AS PER ITEM SR NO. 1 OF MAIN SCOPE OF WORK AT ANNEXURE-X of e-NIT DOCUMENT).

Overhauling of Boiler Furnace Pressure Part, Cleaning, Thickness Measurement and Burner System etc. [AS PER ITEM SR NO. 2 i) to 2 iv) OF MAIN SCOPE OF WORK AT ANNEXURE-X of e-NIT DOCUMENT)

Repairing of Pent House, SS Wire mesh in BAH, Economizer Hoppers and Seal Plate (AS PER ITEM SR NO. 3 OF MAIN SCOPE OF WORK AT ANNEXURE-X of e-NIT DOCUMENT).

Servicing/Repairing/Overhauling/Replacement of HP Valves etc. (AS PER ITEM SR NO. 4 OF MAIN SCOPE OF WORK AT ANNEXURE-X of e-NIT DOCUMENT).

Overhauling of Water wall Bottom Ring header (AS PER ITEM SR NO. 5 OF MAIN SCOPE OF WORK AT ANNEXURE-X of e-NIT DOCUMENT).

PART-B: UNIT RATES FOR THE PURPOSE OF VARIATION ONLY

Lifting of LTSH complete module repositioning after carrying out repair / replacement wherever required. (HP joints and radiography excluded)

Lowering down the Economiser coil (Upper & lower) and re-positioning after carrying out repairs / replacement wherever required. (HP joints and radiography excluded)

Repair & Replacement of Castle Baffle

Replacement of Shield / Shroud

Application of refractory

HP joints including cutting, edge preparation etc. upto tube dia 76 mm diameter.

Fin Welding

Fabrication of Pressure Part Bend out of boiler tube of various size upto 76.10mm.

Thickness measurement of tubes by De-metering

Servicing of Wall Blower.

Servicing of hanger in critical piping

Replacement of hanger in critical piping

Pulling & Alignment of Final Super Heater coils by locking them with scallop bar after pulling of coils including erection and dismantlement of scaffolding for execution of work.

Making work space for carrying out inspection & repairs (build ups, shielding etc.) in one LTSH coil by pulling adjacent modules by push-pull machine/chain pulley block.

DPT of stub joints / hand holes (Pent house, SHH-9, intermediate header, ECO inlet header etc.), safety valves welds with DPT kit.

Removal of skin casing, re-fixing of skin casing after repair in pent house.

Replacement of gasket of manhole of Boiler drum.

Erection and Dismantlement of Cup Locks Scaffolding

Servicing/Repairing of HP/LP Valves, traps, NRVs:-

Up to 25 mm

40 mm to 50 mm

65 mm to 100 mm

150 mm to 200 mm

250 mm & above

Replacement of HP/LP valves, traps, NRVs:-

Up to 25 mm

40 mm to 50 mm

65 mm to 100 mm

150mm to 200mm, (Class – 2500 or above, Alloy steel including heat treatment etc., if required)

250mm & above (Class – 2500 or above, Alloy steel including heat treatment etc., if required)

Replacement of HP/LP piping (in per Mtr. running length):-

i) Pipeline/tracing line of size up to 25mm dia.

ii) Pipeline of size up to 26mm to 50mm dia.

iii) Pipeline of size up to 51 to 76.10 mm dia.

Servicing of safety valves

i) Drum Safety valve

ii) M.S. / SH Safety Valve / ERV

iii) R.H. Safety Valve (HRH/CRH)/ ERV

iv) PRDS Safety valve

v) Soot Blower Safety Valve

vi) HFO/LDO system safety valve

vii) SH ERV including Pilot valve

viii) RH ERV including Pilot valve

Man hour rates (including T&P, Gas, Consumables etc.)

i) Skilled labour / welder

ii) Semi Skilled

iii) Un-skilled

M/s Power Tech Engineering Co. (BID ID -1189803)

UNITED ENGINEERING (BID ID -1195173)