Replacement of PVC Pipes with 140mm HDPE PN 6 Pipes from Headworks to Uppardam Pumping Main II in CWSS to Sunnambukkadu and 38 Other Habitations in Dharapuram and Kundadam Union in Tiruppur District for the year 2025 26 Reach II

Earth work excavation and depositing on bank with initial lead of 10m and lift of 2.0m in hard stiff clay, stiff black cotton soil, hard red earth, shales, murram, stoney earth and earth mixed with small size boulders etc., complete and as per directed by TWAD Board Officers. Hard stiff clay, stiff black cotton, hard red earth, shales, murram gravel, stoney earth andearth mixed with small size boulders and hard gravelly soil.SS20B

140 mm dia HDPE PN 6 Pipes

Supply and delivery of HDPE pipes for potable water supply with necessary couplers (or) bell ended pipes as specified in ISI, the required quantity of solvent cement and having the following working pressure. The cost of pipes should include loading, freight, transit insurance, incidental charges, packing, taxes and transportation charges upto stack yard in good condition etc., complete (the cost excluding unloading from lorries at stack yard and stacking which will be paid separately) etc., complete and as per directed by TWAD Board Officers.

140 mm dia HDPE PN 6 Pipes

Loweing HDPE pipes and specials to trench and laying to proper grade and alignment and as directed by the TWAD Board Officers.

140 mm dia HDPE PN 6 Pipes

Jointing HDPE Pipes and Specials by butt fusion welding / electro fusion welding joints using fusion equipment as per ISO 21307-2011 and as per IS 7634 (part-2) : 2012 including cost of hire charges for butt fusion equipment power supply arrangements etc., complete and as per directed by TWAD Board Officers.

140 mm dia HDPE PN 6 Pipes

Conveyance of following pipes including unloading from lorries at stock yard and stocking propoerly and loading in to lorries at stock yard, transportaion charges upto 8km from stak yard and unloading from lorries at site/ along the alignment carefully etc., complete and as per directed by TWAD Board Officers.

140 mm dia HDPE PN 6 Pipes

Testing of pipes for water supply with hydraulic testing equipment by filling with water (including cost of water) and testing to recommended pressure in convenient stretches and attending the bursts if any occured during the test, excluding the cost of pipes but including other incidential and operational charges etc., complete for the following diametres of pipes and as directed by TWAD Board officers

140 mm dia HDPE PN 6 Pipes

Refilling with excavated soil complying with standard specification, well ramming, consolidated and depositing the surplus earth at places and as directed by TWAD Board officers.

140 mm dia HDPE PN 6 Pipes

Supply and delivery of DI D/F Gate (sluice) valves (soft seated) resilient seated soft sealing Gate Valves (Sluice Valves) with body Bonnet of Ductile cast iron of Grade GGG 40 or GGG 50, Wedge fully rubber lined with EPDM replaceable spindle nut without gland packing and with 3 O- Ring protection on the shaft and seals of NBR and the valves should be of Vacuum tight and 100% leak proof with face to face dimensions as per BS 5163-89/ISI 14846-2000/DIN 3202 F4. All the valves should be with electrostatic powder coating both inside and out side with pocket less straight through body passage. All the valves are to be compatible for buried application with pressure rating PN 10/16 and with 5 years warranty etc., complete and as per directed by TWAD Board Officers.

80 mm DI D/F Gate (sluice) valve

50 mm DI D/F Gate (sluice) valve

GST at 18.00%

SCHEDULE - "A"

General

Changes in the Probable of Probable of Quantity

Goods and Service Tax & TDS on GST

Vide separate sheets attached.

TAMIL NADU WATER SUPPLY AND DRAINAGE BOARD

SUPERINTENDING ENGINEER, ERODE - TIRUPPUR- KARUR CIRCLE, ERODE.

SCHEDULE - A

(E – Tendering System)

BILL OF QUANTITY

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