Removal of existing disfunctioned Diffuser and insatllation of new Diffuser arrangements to areation tank at STP

Amount

The diffuser elements with SS304 shall be membrane type and resistant to such ingredients as hydrocarbons, oil and grease. The diffuser made of EDPM of size 90 mm OD to a length of 1000 mm with required hose to deliver 8-10 cum/hour , SS 304 specials band clamp and other connected arrangements for supplying required air to the aerator unit .The cost including required materials for completing the aeration unit as directed by the TWAD Board Officers.This shall afford a high oxygen transfer rate coupled with a minimal pressure drop besides permitting simple erection onto the horizontal air manifold Suitable provision for lifting the headers easily above the water level for maintenance without the need for draining the tank shall be provided for each header. Isolating valves of polypropylene shall be provided upstream of the coupling to cut off the flow through the specified header for purposes of attending to the diffuser header and also diffusers. 81 Nos Retrievable arrangements with SS Tee, Hose with 2 Nos of 1000 mm length , 90 mm OD Diffuser.

Aerator Air Pipe - Fabricating, supply, delivery and erection of SS 304 Pipe ( Schedule 40 ) for air diffuser for the air supplied by the Air compressor . The cost of material and labour charges for rolling the SS sheet and welding charges and for the required specials such as SS flange, Elbow, end closure plate and end header support plate etc. complete as directed by TWAD Board Officers. To suit 27.5 m x 20 m - 80 mm Diameter, 5.49 mm thick as per schedule 40

150 mm Diameter ,7.11mm thick as per schedule 40

TAMILNADU CHEMICALS INDUSTRIES (BID ID -1477503)