Tamil Nadu Transmission Corporation Limited-TANTRANSCO has published Nctps – I - Se/Mi Circle – R&M (22-23) - Tm Dn. – Unit Ii – Replacement Of Defective Nrv Of Size 8” / 2500 Class In Boiler Feed Pump 2B Discharge Line In Unit-Ii During Any Breakdown / Shutdown Period. Submission Date for this Tender is 20-03-2023. Boiler Supply Tenders in Thiruvallur Tamil Nadu. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Cutting the spool piece & defective NRV for required length from the carbon steel pipe Dia 219.1mm and 28mm thickness and transportation to the site from the stores and devolution of the released piece to the stores. Including cost of consumables & T&P’s. |
| 2 | Arresting the boiler feed pump discharge pipe line Dia 219.1mm and 28mm thickness and releasing it after the Works. Including cost of consumables & T&P’s. |
| 3 | Cutting, by grinding and removing the NRV from the BFP discharge line and removal of drain pipe line and grinding it to fit suitably into the piece. Including cost of consumables & T&P’s. |
| 4 | Edge preparation of BFP discharge line and spool piece (2 joints). Including cost of consumables & T&P’s. |
| 5 | Drilling and edge preparation of suitable hole for welding the drain line in the new spool piece. Including cost of consumables & T&P’s. |
| 6 | Positioning of spool piece in line with BFP discharge line and welding. Positioning of drain line and tag welding it with spool piece and the drain pipe line. Including cost of consumables & T&P’s. |
| 7 | Preheating the weld area of spool piece NRV with the BFP discharge line and drain line with spool piece ( heating coils and welding transformer are to be arranged by the contractor). Including cost of consumables & T&P’s. |
| 8 | TIG welding the spool piece, NRV with the discharge line ( 2 joints) and TIG welding the drain line with the spool piece. Including cost of consumables & T&P’s. |
| 9 | Stress releaving the welded area of the line. Including cost of consumables & T&P’s. |
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