NCTPS I SE MI circle Boiler Maintenance Division Repair and Maintenance works for the year 24 25 Specification No 163 24 25

Amount

Cutting by grinding and removing the ERV isolation valve with main ERV from the MS line and removal of bypass pipe line and grinding it to fit suitably into the piece. Including consumables & T&P’s.

Edge preparation of MS line to ERV and spool piece including consumables & T&P’s.

Transporting of defective ERV isolation valve from NCTPS-I store / site to outside workshop

Machining the valve stem of ERV Isolation valve & disc in lathe to expose parent metal to have good bonding for welding and filling up material in the worn out area of valve stem & disc by welding using alloy steel welding electrode and machining the valve stem & disc to the required size including consumables & T&P’s.

Charges for Metal filling work on wornout / eroded valve seat, cone and metal builtup on valve end connection area by special welding electrode, machining of valve seat, cone, valve end connection area, fine lapping of seat area, checking of stem run out and stem polishing including consumables & T&P’s.

Overhauling of 100 NB hand operated isolation valve: Work involves dismantling & reassembling the valve with new Tech seal Bonnet, Tech seal for body, Stack, Gauge and gland packing including consumables & T&P’s.

Hydraulic testing of the reconditioned valve at 20 to 170 kgs/cm2 max pressure in presence of site Engineer. Including consumables & T&P’s.

Transporting of reconditioned of new ERV isolation valves from workshop to NCTPS-I site

Pre heating the weld area of spool piece ERV isolation valve with the MS line (heating coils and welding transformer are to be arranged by the contractor) Including consumables & T&P’s.

TIG welding the spool piece, ERV Isolation valve with MS line and TIG welding the bypass line including consumables & T&P’s.

Stress relieving the welded are of the line including consumables & T&P’s.

ferrofabs (BID ID -1134341)