PWRJT26210 - Modification works in 42 inch pipeline of SPM I and SPM II for relocation of 42 inch swing check valve

GST % for the tender Please select the rate of GST in cell AY13. Rate selected shall be applicable for the entire BoQ.

MECHANICAL WORKS

Dismantling of existing over ground piping works/Valves/NRVs of all types and sizes by opening flange joints or by gas cutting/ cold cutting or any other approved suitable means without damaging other portions of work. The job includes evacuation of the contents of the piping, cutting the pipes to required sizes as directed, taking out valves, flanges, tees, bends, gaskets nuts, bolts etc. attached supports alongwith any instruments such as pressure gauge, temperature gauge etc. handling, transporting and storing at owner's designated store in safe manner to avoid damage including supply of all labour, materials, equipments, consumables etc. necessary to perform and complete the work in all respects as per drawings, instructions of the Site Engineer / EIC (payment shall be made on linear measurement of dismantled piping including bends tees etc.). Note : The contractor shall indicate the piping system to be dismantled and shall take specific approval from the Site engineer before dismantling of pipe. Certain redundant pipes which in the opinion of the Owner need not be retrieived, those items shall not be dismantelled. This works item will be executed for Removal of 02 nos of swing check valves of 42IN size from the location. Required machinery, tools and tackles will be in the contractors' scope of works as mentioned.

Supply of Steel Flange (42" WNRF 150#)

Supply of Spiral Wound Metallic Gaskets (42" SWMG ANSI 150#)

42" NB Piping: Isolating the section by closing the valve and providing positive isolation with the help of suitable plates / spectacle blind, Draining of the section, water flushing, Cutting of portion of existing piping of required length by Cold cutting machine (to be arranged by contractor)/ Opening of WNRF/SORF/Blind Flange trimming, mud plugging with bentonite and required material, grinding, bevelling the edges, adding spool piece of required length/ Tee of the corresponding pipe size, thickness, adjoining and welding both the pipe ends ,or welding WNRF to pipe and bolting it with spool pipe/Valves mating flange including supply of all inputs such as labour, materials, equipment, consumables, lifting equipments,etc. necessary to perform and complete the work in all respect as per specification and instruction of the Site Engineer / EIC. NOTE: i) This is a high precision work which is to be executing in minimum time so reduce operation downtime period taking all safety precautions. Before start of work firm planning to be done in consultation with EIC/ Site Engineer and contractor should mobilise all required resources before start of work. ii) The job also includes evacuation of product from the piping section after isolating the section and flushing with water and its disposal. iii) Prior to start of work Party to prepare the complete scheme of hook up job and submit it to EIC/Site Engineer for approval and should carry out the job as per approved procedure. This work item will be executed for cold cutting of pipeline header at 04 locations for relocation of NRVs as specifed by SIC/EIC. This cold cutting will be done for welding WNRF flanges, fitting and installation of NRV in position.

Pipe size 30 inch NB and above: Carrying out modification in already fabricated and/ or erected pipe due to change in drawing or as required by site condition, taking delivery of pipe, pipe fittings, steel flanges, spiral wound metallic gaskets & fasteners from designated location within station premises, transporting the same to site, cutting of pipe and / or weld joint , edge preparation, bending, lining up, welding and installing pipes and pipe fittings, flanges, elbows, equal and reducing outlet tees, concentric/eccentric reducers, spool piece, y-type strainers, drain funnels, vent pipes and tapping for instruments such as pressure gauges, thermal relief valves, thermowells etc., installing above ground at all elevations connecting with equipment nozzles, valves, vessels, in line instruments etc., welded and threaded pipe line of different pressure ratings, flushing pipes by water after cleaning by compressed air, hydrostatic testing of each section to the specified pressure, draining the water, tie-in, final cleaning-up and dispoal of wastes and surpluses including providing all inputs such as labour, material, equipments and consumables,machinery, lifting equipments,etc. necessary to perform the work (other than those specifically under taken by the owner in this contract) and completing the work in all respects in accordance with the drawings, specifications and instructions of Site Engineer / EIC. (Item is to be operated upon approval of SIte Enginner, Item covers only modification / rework jobs.) This works item will be executed for making 02 nos of 42IN dia pipeline size spool piece for dimensions/length as specified by EIC/SIC

Supply of Steel Fasteners (Fasteners for Flanges 42" x 150# (1.0" Dia. X 8" Length))

42" NB Pipe Joints RT: Inspection of welding by Digital Radiography (CR) or by conventional film radiographic method on all types of piping including processing of images/ films and interpreting the results of weld quality and reporting the same to the Site Engineer together with recommendations as to the acceptability or otherwise of the welds, submitting the finished radiographic films as may be approved or directed by Engineer-in-Charge inclusive of supply of all personnel, labour, materials, equipment, consumable, inputs, etc. and providing all services complete in all respects as envisaged in the contract documents. Note: i) Payment will be on the basis of number of welds of the respective size radiographed and shall be all inclusive for the complete job of radiographic inspection as envisaged in the contract document. ii) Radiography not involving full girth weld will be paid at 50% of the rate for full girth weld for the respective size. iii) For set-on type branch welding, the rate for radiography will be as applicable to the branch pipe size. iv) Repeat radiography of individual welds due to defective films or repair of welds shall be done at contractor's cost. v) In case where radiography is not possible, verification by ultrasonic testing shall be done at contractors’ cost., vi) Magnetic particle inspection as and where required shall be done at Contractors cost. vii) In case of conventional film radiography, all films shall be digitised and submitted to EIC/ Site Engineer in USB drives. viii) In case of Digital/ Computed Radiography, native files along with image/ pdf files shall be submitted to EIC/ Site Engineer in USB drives.

CIVIL WORKS