Tender For Nctps-Iii - Mechanical- I Circle - Boiler Maintenance Division - Boiler - Overhauling Of Hp Valves, Ms, Crh, Hrh, Soot Blower & Aprds Safety Valves, Renewal Of Gasket In Hfo Strainers, Providing/ Renewal Of Damaged Drain Lines And Painting
Tender Value
Ref. Documents
Estimated cost
Bid Submission
29 Oct 2026
2 days left
EMD
32350
Bank guarantee accepted
Document Fee
Ref. Documents
Non-refundable
Tender Type
Online
Tender Overview
Organization
Tender ID
Competition Type
NCB
Bidding Type
Tender
Location / State
Thiruvallur → Tamil Nadu
EMD Exemption
Available
Quantity
Not Available
Website
Contact Person
Address
Project Description
Tender for Nctps-Iii - Mechanical- I Circle - Boiler Maintenance Division - Boiler - Overhauling Of Hp Valves, Ms, Crh, Hrh, Soot Blower & Aprds Safety Valves, Renewal Of Gasket In Hfo Strainers, Providing/ Renewal Of Damaged Drain Lines And Painting On Hp Valves, Safety Valves In Boiler During Long Shutdown/Annual Overhaul Period Of Boiler 2026-27.
BOQ
| Sl. No. | Item Description |
| 1 | Overhauling of Hand Operated HP valves, this works involves dismantling, inspection, rectification of defects if any, lapping of valve seat and disc, renewal of sealing rings, gland packing, flange gaskets/bonnet gasket, cleaning all parts, inspection of drive bush, bearings etc, and assembling of valves. Charges including consumables and hire charges for T&P's. |
| 2 | Valve Size : Upto 25 mm valves of class 2500SPL /3000/3500/4000 |
| 3 | Valve Size : NB 40 / 50 mm valves of class 2500SPL /3000/3500/4000 |
| 4 | Valve Size : NB 65 / 75/80 mm valves of class 2500SPL /3000/3500/4000 |
| 5 | Overhauling of Motor Operated valves, this works involves removal of actuator from the valve stem, removal of actuator thrust base, Dismantling of valve bonnet, removal of valve stem and gate, Cleaning of valve internals, Lapping of valve gate seating area, Blue matching of Valve gate seating area and seat in valve body Assembling of valve gate and stem in the valve casing, assembling of valve bonnet, renewal of gasket in valve bonnet, renewal of Gland packing in valve Gland, fixing the actuator on the valve stem and commissioning the valve. ( Valve Size : NB 40/50 mm valves of class 2500 Spl /3000/4000). Charges including consumables and hire charges for T&P's. |
| 6 | Overhauling of Motor Operated valves, this works involves removal of actuator from the valve stem, removal of actuator thrust base, Dismantling of valve bonnet, removal of valve stem and gate, Cleaning of valve internals, Lapping of valve gate seating area, Blue matching of Valve gate seating area and seat in valve body Assembling of valve gate and stem in the valve casing, assembling of valve bonnet, renewal of gasket in valve bonnet, renewal of Gland packing in valve Gland, fixing the actuator on the valve stem and commissioning the valve. ( Valve Size : NB 65/75/80 mm valves of class 2500 Spl /3000/4000). Charges including consumables and hire charges for T&P's. |
| 7 | Overhauling of Motor Operated valves, this works involves removal of actuator from the valve stem, removal of actuator thrust base, Dismantling of valve bonnet, removal of valve stem and gate, Cleaning of valve internals, Lapping of valve gate seating area, Blue matching of Valve gate seating area and seat in valve body Assembling of valve gate and stem in the valve casing, assembling of valve bonnet, renewal of gasket in valve bonnet, renewal of Gland packing in valve Gland, fixing the actuator on the valve stem and commissioning the valve. ( Valve Size : NB 100 /125/ 150 mm valves of class 2500/3500/4000) |
| 8 | Overhauling of Hand Operated valves, this works involves Dismantling of valve bonnet, removal of valve stem and gate, Cleaning of valve internals, Lapping of valve gate seating area, Blue matching of Valve gate seating area and seat in valve body Assembling of valve gate and stem in the valve casing, assembling of valve bonnet, renewal of gasket in valve bonnet, renewal of Gland packing in valve Gland, fixing the actuator on the valve stem and commissioning the valve. ( Valve Size : NB 100 /125/ 150 mm valves of class 2500/3500/4000). Charges including consumables and hire charges for T&P's. |
| 9 | Overhauling and Servicing of SH/ RH Spray Control Valves at Boiler 80mts elevation, Valve Size: NB: 75/65/80 Class 1500/ 2500Spl /2764 Pneumatic Operated. (Make : IL PalaKkad). Charges including consumables and hire charges for T&P's. |
| 10 | Overhauling and Servicing of SH/ RH Spray Control Valves at Boiler 80mts elevation, Valve Size: NB: 100/125/150 Class 1500/ 2500Spl /2764 Pneumatic Operated. (Make : IL PalaKkad). Charges including consumables and hire charges for T&P's. |
| 11 | Charges for rectifying hard to operate and leaking valves upto size of 50 NB by cleaning the stem with rustolin, removing & cleaning the rusted gland flange, bolts, gland packing, greasing re-assembling, ensuring free operation of valve. Charges including consumables and hire charges for T&P's. |
| 12 | Charges for rectifying hard to operate and leaking valves size 80 NB to 400 NB by cleaning the stem with rustolin, removlng & cleanlng the rusted gland flange, bolts, renewal of gland packings, removal of actuator & renewat of Thrust base bearings freeness of jammed stem nut and reassembling welding of disconnected sealing lines, greasing re-assembling, ensuring free operation of valve. Charges including consumables and hire charges for T&P's. |
| 13 | Renewal of gland packing in HP valves by including supply of gland packing as per the instructions of Engineer in-charge. Charges including consumables and hire charges for T&P's. |
| 14 | Up to 40 mm Size Valves. (Class 1500/2500/3000/ 4000). |
| 15 | 50 mm to 80 mm mm Size Valves. (Class 1500/2500/3000/ 4000). |
| 16 | 100 mm to 150 mm.(Class 1500/2500/3000/ 4000). |
| 17 | 200 mm and Above (Class 1500/2500/3000/ 4000). |
| 18 | Charges for cleaning, inspection & checking of cracks if any in the valve bonnet,seat & disc of size-200 NB to 300 NB valves and NRV of class 3500/4000 by applying Die penetration cleaner, penetrate & developer and welding the crack including DPT kit in contractor scope including charges for T&P's consumables etc., |
| 19 | Overhauling of 500/550 NB valves. |
| 20 | Providing chain block arrangement,dismantling of electrical actuator and motor assembly of 500/550NB valve by Loosening of all bolt and nuts.Dismantling of yoke assembly of valve by loosening and releasing of heavy size HT bolt & nuts.using chain block arrangement lead ,lift of material to valve location of Boiler including consumables,T&P's complete. |
| 21 | Fabrication of special type heavy duty fixture for facilitating to dismantle the heavy size bonnet clamp of 500/550 NB valve from valve body by insitue fabrication method.The work involves transporting,leading and lifting of required heavy steel materials from store to valve location in boiler ,designing of special type heavy duty fixture based on site condition,marking of fixture for the designrd shape,gas cutting and grinding of MS materials,welding of fixture to match with the site condition to facilate for releasing of heavy size bonnet from valve body. |
| 22 | Fabrication of special type heavy duty fixture for facilitating to dismantle the heavy size bonnet , split ring,bonnet packing ring and support ring assembly of heavy size 500/550 NB valve from valve body by insitue fabrication method.The work involves transporting,leading and lifting of required heavy steel materialsfrom store to valve location in boiler ,designing of special type heavy duty fixture based on site condition,marking of fixture for the designrd shape,gas cutting and grinding of MS materials,welding of foxture to match with the site condition to facilate for releasing of heavy size bonnet ,split ring, bonnet packing, and support ring assembly from valve body. |
| 23 | Dismantling of totally gland bolts and gland collar,bonnet clamp bolts,heavy size bonnet clamp,bonnet arresting split rings by using 7 ton capacity chain block arrangement,special heavy duty fixtures and 2 x 100 tons capacity hydraulic jacks by lifting, lead, lift complete at valve location of Boiler including consumables,T&P's. |
| 24 | Dismantling of heavy size bonnet assembly with heavy size stem 100mm Dia x 2 mtr length with valve disc by using 7 ton capacity chain block arrangement,special heavy duty fixtures and 2 x 100 tons capacity hydraulic jacks by lifting, lead, lift complete at valve location of boiler including consumables, T&P's. |
| 25 | Overhauling and Rectification of 500/550 NB valves and its internal parts,Lapping of seating surfaces of valve disc and seating ring with coarse particle lapping paste and fine particle lapping paste,blue matching of valve disc and valve seat surfaces,repeating of lapping and blue matching process till achieving the perfect matching to ensure valve sealing by using 7 tons capacity chain block arrangement including consumables, T&P's, leading, lifting and assembling of valve. |
| 26 | Renewal and reassembling of defective parts of bonnet assembly such as grafoil gland rings,supporting ring,grafoil gasket in the bonnet assembly before assembling the bonnet assembly inside the valve,including sheet cutting of bonnet and valve body machining surface area by grinding,buffing and filling etc., including cost of consumables, machining charges, T&P's, leading, lifting etc., |
| 27 | Reassembling of valve internals such as gland bolts,bonnet clamp bolts,bonnet assembly,SS valve stem(Dia 100mm x 2 mtr), valve disc having 450mm dia and heavy weight of 500/550 NB valve.using chain block arrangement after attending defects and aligning,matching, checking seating position including leading,lifting, assembling ,consumables and T&P's. |
| 28 | Re-assembling of yoke of 500/550 NB valve by tightening of heavy size HT bolt & nuts.Re-assembling of electrical actuator and motor assembly of 500/550 NB valve by tightening of all bolt and nuts using chain block arrangement and removing chain block arrangement including leading,lifting, assembling, consumables and T&P's. |
| 29 | Commissioning of rectified and assembled valve by manual operation of full open and full close and adjusting of gland packing tightness and adjusting valve stem upper and lower travel limit for calibration of limit switch level retightining of all bonnet bolts after conducting hydraulic test and again tightening after syncronising of unit at hot condition and lifting upto valve location of boiler including consumables with necessary T&P's leading. |
| 30 | Overhauling of Separator/Super heater Safety valve ( Size:3\\"/8\\" ; Type 174BWP/174BWH) by dismantling, cleaning of safety valve all spare parts, lapping the seat and disc, assembling without disturbing its initial settings. Charges including consumables and hire charges for T&P's. |
| 31 | Overhauling of CRH/HRH Safety valve ( Size:6\\"/10\\" &Type 1787WB/1787WH) by dismantling, cleaning of safety valve all spare parts, lapping the seat and disc, assembling without disturbing its initial settings. Charges including consumables and hire charges for T&P's. |
| 32 | Removal of jammed safety valve seating disc with stem from disc holder:This work involves removal of jammed seating disc from stem by gas cutting, re-threading of stem and fixing new seating disc,blue matching of inner cavity with shaft, nose tips,blue matching of new disc with valve lapping disc,etc., |
| 33 | Overhauling of PRDS & Soot blower safety valves: This work consists if dismantling, cleaning, inspection, rectification of any defects,lapping the seat and disc assembling without disturbing its internal settings and assisting during the floating. |
| 34 | On line pressure setting of safety valves in Boiler, this works invovles providing working platform and fixing of special fixture kit on the safety valve stem and applying extra presssure more and above the MS /Seperator/ CRH / HRH / APRDS & Soot blower line pressure available on the boiler with the help of calibrated controlled mechanical tools. Charges including consumables and hire charges for T&P's. |
| 35 | Charges for cleaning HFO strainer/filter in Boiler HFO Station by closing inlet valves, dismantling top cover of strainer, cleaning of inner and outer filter elements, inspection of both side flange bolts tightening and assembling of strainers/filter. Charges including consumables and hire charges for T&P's. |
| 36 | Charges for cutting & removing of worn-out corroded & punctured / damaged drain pipe lines or valves & IBR bends of OD33.5-65mm and cutting new ones to the required length or valves preparing edges bt grinding,aligning & welding with the existing pipes or valves by IBR welder. ( Bends & pipes will be given by board at free of cost) including charges for T&P's consumables etc., |
| 37 | Charges for surface preparation and two coat of Lumerous - HR - 47 Aluminium painting on Main Boiler HP/LP Valves, MS / Separator / HRH / CRH / Soot blower / APRDS Safety valves. Charges including consumables and hire charges for T&P's. Please Enable Macros to View BoQ information |
AI Tender Summary
Tender Timeline
Oct 23, 2026
11:30 IST
Tender Published
Tender notice published.
CompletedOct 29, 2026
17:00 IST
Bid Submission Deadline
Online submission via eProcurement portal.
Upcoming · 2 daysOct 30, 2026
Bid Opening Date
Technical bids will be opened and evaluated.
Upcoming · 3 daysTender Documents
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