Repair and providing HVOF coating on 04 set ,04 No. damaged Nozzle Liner and 04 No Spear Tip , of 3x40MW SVP Bhaba Power House.under Electrical Maintenance division HPSEBL, Bhabanagar.

Repair and Providing HVOF Coating on (1) one No. Tip Liner and (1) one No. Speare) of 3x40MW Bhaba HEP. Prior to start of work existing HVOF coating will have to be removed from the surface by the process of sand blasting &under cutupto 1mm thickness of liners and spears. After repair spears should fit properly on needle stem of Nozzle assembly. Remove all the pitting, damaged portion by undercut, grinding and then deposition through build up by specified electrodes (SS410 NiMO) Providing HVOF Coating on 01 no. Liners and 01 no. Spears of 3x40MW BhabaHEP.The HVOF system to be used should be capable of spraying Tungsten Carbide powder with following properties: • Porosity less than 1% • Bond strength of more than 10,000 psi. • Surface finish-Better than 6Ra. • The Coating thickness shall be 250-300 microns. • Hardness of more than 1100VHN. The bidder should use Tungsten Carbide Powder with-A typical composition of WC-86%, Co-10% and Cr-4% by weight. Test certificate to be furnished.

Note:- The scope of this work includes the provision of labour, tools, plants, material and performance of work necessary for the design, manufacture, quality assurance, quality control, shop assembly, shop testing, delivery at site, site storage and preservation, installation, commissioning, performance testing, acceptance testing, training of Employer’s Personnel, handing over to Employer , as per specification hereunder complete with all accessories and warranting trouble free safe operation of the installation.

Note:- All other extra consumable material required for the job if any, same will be in the scope of the contractor without any extra cost. Transportation / Carriage of all parts shall be in scope of contractor/firm. The Contractor shall provide all the required equipment, services, accessories & material required for the completion of the job as per site requirement whether explicitly mentioned in these specifications or not to fulfil the intent of the specification and to ensure the completeness, operation and maintainability of the system at no extra cost to the Employer. Contractor will be responsible for any fatal/non-fatal accident during the work. Completion of job in all respect as per directions of Engineer In-Charge.

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