NTPC LIMITED
PROJECTS	: Korba Super Thermal Power Station, St-II (3 x 500 MW)
	Ramagundam Super Thermal Power station, St – I (3 x 200 MW)
	Ramagundam Super Thermal Power station, St – II ( 3 x 500 MW)
PACKAGE NAME	: RLA OF CRITICAL PIPING

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“Salient Technical Features of the equipment/systems/services covered in IFB No. 40065752 dated 09.11.2016 Bidding Document No. CS-2130/3120/3100(R&M)-741-9 are mentioned below. These Salient Technical Features are mentioned only to facilitate the prospective bidders to prima-facie understand the requirements under the tender and shall not in any way limit or alter the scope of work and technical features/specification of equipment/ systems/ services covered in the Bidding Documents. Detailed provisions in regard of scope of work and technical features/ specification of equipment/ systems/ services, contained in the Bidding Documents shall be final and binding.”

SALIENT TECHNICAL FEATURES

Brief Scope of Work

The Brief scope of work for the subject RLA Study of Critical Piping systems (v.i.z Main Steam, Cold Reheat, Hot Reheat, Feed Water discharge, HP & LP Bypass Piping, MS & CRH to Aux PRDS, CRH to Deaerator, HP heaters, BFPT etc. piping) for Korba Super Thermal Power station St-II (3 x 500 MW), Ramagundam Super Thermal Power station, St – I (3 x 200 MW) and Ramagundam Super Thermal Power station, St – II (3 x 500 MW) involves the following:

a)Hot & cold walk down survey/visual inspections of Critical Piping systems including their hangers & supports, Metallography analysis, Advanced Ultrasonic testing (like PAUT / TOFD etc.) OD & thickness measurement, hardness testing, DPT, MPT etc. for weld joints, bends & tees, reducers, Y-pieces straight pipe etc.

b)Stress Analysis of piping and design check of hanger and supports & recommendation for replacement.

c)Remaining life calculation using FEM (Finite Element Method) analysis for the piping systems (MS, HRH, CRH, HP&LP Bypass and MS & CRH to ASPRDS).

d)Based on the completion of the Residual life assessment (RLA) / Condition Assessment (CA) for various piping systems of the plant, the contractor shall submit a comprehensive report to the owner. The report will consist of all results, recommendations and improvement proposals.

e)Recommendation regarding replacement of various piping components, wherever considered essential. This recommendation shall be in three parts:

a.Components requiring immediate replacement

b.Component which will need replacement after Three ( 3 ) years

c.Component which will need replacement after Six (6) years.

f)Suggest measures for improvement of plant performance and up-gradation needed considering operation at full load and extension of life by 20 years after R&M based on recommendations. These proposals shall be subdivided into :

a.Root cause analysis.

b.Immediate measures.

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c.Measures to be taken in future.

d.Improvement / change in O&M practices.

g)Supply, installation & dismantling of scaffoldings for completion of RLA activities is in the scope of Bidder.

h)Complete removal of insulation from MS, HRH, CRH, HP&LP Bypass and from identified locations (as per scope) for remaining piping in bidder scope

i)Supply of new Insulation material and new aluminum cladding and its associated accessories and installation of same is in the scope of bidder

j)Disposal of removed insulation to the location specified by NTPC site (in close proximity of plant area) is in the scope of bidder

k)Depositing removed aluminum cladding sheets to Site-store or as per instruction of Project Manager is in the scope of bidder.

Approximately 20 days shut down for each 200 MW and 25 days shut down for each 500 MW have been planned for conducting RLA / CA study of critical piping systems (including removal & reinstallation of insulation) mentioned above .

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