Repairs to the Y-Junction (Mild Steel) Delivery Manifold of Pump House Stage 2nd WSS Tangnar

Amount

Isolating delivery pipes of unit, No. 02 and 03 in existing worn-out/Damaged Y-junction 800/400 mm Dia Delivery Manifold by way of cutting 800mm Dia. main pipe just before the intersection of delivery pipes of unit No’s 01 and 04, marked as spot “A” on the drawing of the Y-Junction manifold enclosed herewith. The job is to be executed using of oxyacetylene gas cutter, skilled labour, Mobile workshop, tools and tackles as required for carrying this job at site/workshop.

Engagement of Hydra Crane for lifting of damaged portion of the manifold isolated from the main structure and shifting it to the store.

Cleaning of the leakage spots at the intersection of 400mm diameter individual delivery pipes of unit No 01 and 04 to main 800 mm dia pipe which stands open at one end. from rust and other foreign bodies using required cleaning tools/brushes.

Providing, fitting of MS Flats of size [3 x 60 mm about 2.74 m long ] in order to make it leak proof joint involving heat treatment and allied welding techniques oxy- acetylene gas cutter ,allied tools and tackles required for carrying out the said job at site

The Job also includes welding of cracked/leaking spots inside as well as outside by arc DC welding using Adore/Adwani electrodes in two layers

Providing and fitting of 800mm diameter circular blind flange fabricated out of 12mm thick MS sheet at spot “A” marked on the enclosed drawing of the manifold, so as to avoid prolonged disruptions of pumping operation. The job also includes leak proof welding in double layer and proper cleating at appropriate places. The job includes all costs on a/c of mobile workshop, skilled crew etc. .85x0.85x 0.012x7850= 68 kgs

Steel work in built up tubular (round, square or rectangular hollow tubes etc.) trusses etc., including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer, including welding and bolted with special shaped washers etc. complete. Electric resistance or induction butt welded tubes Description of work: (Replacement of worn out portion of the 800/400mm Dia. Y junction delivery manifold along with the dead end 800mm dia blind flange if any with a new pipe structure by arranging prefabricated portion of the 800/400mm Dia Y junction delivery manifold placing two 400mm diameter 8mm thick pipes of approx 2.743 m lengths on the opposite sides at an angle of 45 Degree with the 800mm diameter pipe of approx 4.572 m length. One end of the 800mm pipe shall be fitted with 1M x 1M blind MS Plate fabricated out of 12mm thick MS sheet. The job includes extension of above 400 mm Dia Pipe network on oopsite side of main 800 mm Dia trunk main upto to required length so as to ensure proper end to end concentric contact with the existing 400 mm Dia delivery pipes of Pumping units-No 2 and 3 using superior quality electrodes preferably Essab/Advani /Adore make in two coats to make a firm joint. The job includes using of DC welding set, oxyacetylene gas cutter, skilled labour, Mobile workshop, tools and tackles as required for carrying this job at site/worshop. The pipe to be supplied shall be as per IS 3589 and the weight of the pipe has been calculated as per the formula given in the IS code.

Demolishing RCC work by mechanical means & stockpiling at designated locations & disposal of dismantled materials up to a lead of 1 kilometer, stacking serviceable & unserviceable material separately including cutting reinforcement bars as per below details Size== 5ft x 5ftx 2.5ft deep ===4No's. Size= 5ft x 4 ftx 3.5 ft deep ===2No.

Drilling/auguring of Holes of appropriate size and at appropriate place in above remaining portion of demolished RCC blocks from top side with four No holes to each block for anchoring /foundation bolts along with of each bolt with Tar steel of Block using drilling tools and tackles as required for the said job

The Job includes Providing, fitting and fabrication of MS Foundation bolts to 06 No blocks having 32 mm dia 18-inch-long with 4 inch “L” at bottom with 6 inch threaded portion at top with nuts and washers. 1x4 =4 Nos @4.25 kgs/No=17 kgs per Block

Charges on a/c of Welding arrangement with Tar steel of block

Providing, laying of 50 mm cement concrete [PCC] of mix : 1:1.5:3 (1 cement: 1.5 fine sand 3 aggregate) on Top side of each Block to make a finished regular surface for each block

Providing, fabrication and fitting of MS D-clamps of required length approx. 650mm including web length not less than 200 mm on each side suitable for holding/Clamping 400 mm ND MS pipe for arresting any vibration. The Clamp is to be fabricated out of ISMC 75 having thickness of 5 mm dully drilled with 02 No holes at extreme ends/web to each clamp.

Drilling/auguring of Holes of appropriate size and at appropriate place in above remaining portion of demolished RCC blocks from top side with four No holes to each block for anchoring /foundation bolts along with of each bolt with Tar steel of Block using drilling tools and tackles as required for the said job

Providing, fabrication and fitting of MS U-clamps of required length approx. 1280mm including web length not less than 200 mm suitable for holding/Clamping 800 mm ND MS pipe at centre for arresting any vibration. The Clamp is to be fabricated out of ISMC 125 having thickness of 6 mm dully drilled with 02 No holes at extreme ends/webs to each clamp for accommodating same in the foundation/J -bolts using all skilled labour, tools and tackles required for carrying out above job at site. The job includes drilling/augering of Holes of appropriate size and at appropriate place in CC foundation /blocks from top side with four No holes to each side for anchoring /fundation bolts using drilling tools and tackles as required for the said job

Providing, fabrication and fitting of 5 No’s lateral supports as brace arrangements of length [ (i) 800mm, (ii)2500mm. (iii) 1550mm.(iv)4200mm (v) 3810 mm for glancing stress generated in the pipe joint at Y junction/Offset arrangement during pumping operation. The Supports shall be fabricated out of 100 mm ND MS Pipe 6 mm thick along with providing ,fabrication and fitting of expansion and contraction joint arrangement in terms of length within the lateral support by way of Providing ,fitting, fabrication of 2 no 16 mm thick and 100 mm Dia MS Flange with appropriate MS Fasteners along with Providing, fabrication and fitting of semi circumferential Pipe support at one extreme end of this lateral support fabricated out of portion of MS Pipe of 10mm thickness and 400mm ND with width of 300 mm capable of holding / supporting semi circumferential portion of 400 mm ND MS pipe at Y-Junction outside the deliver manifold and to be welded with MS plate of size 250mm x 250 mm x 10mm at another extreme end to be fixed /located with existing RCC block or RCC wall within the premises of Delivery manifold. The Job includes Providing, fabrication and fitting of necessary right angled triangular shaped MS Cleats of size 80mm x80mm x 6mm on 4 sides of 100mm Dia laterial support Pipe Joint at each ends inclding 100 mm Dia MS flange joint. The job further includes Providing and applying of anti-corrosive polishing enamel paint in two coats to whole laterial structural supports after applying a coat of red oxide and metal primer.

Deduction on a/c of Departmental M-Steel pipe