supply of different m.s. materials and transformer oil (starter oil)required for maintenance work of various m.i. scheme under karimpur (a-i) sub-division under krishnagar -i(a-i) division , supply of different electrial materials , supply of m.s. surge tank as per drawing (annexure-h) the body of which made of 3 mm th. m.s. sheet & top , bottom cover are made of 5 mm th. m.s. sheet welded with the body & straightened with rib etc. all joints must be electrically welded to a leak proof condition & joints must be capable of with standing pressure psi.the surge tank should fitted with all accessories as specified in the drawing.entire surge tank is to be painted both inside & outside over a coat of priming. , supply of 150 mm dia c.i. alfa alfa valve (nipple type) , type - c as per drawing (annexure - g) with hand wheel , 01 wheel for 04 nos. valve , wedge of sluice valve ( 150 mm dia) , over flow pipe of surge tank (80 mm dia) , transformer oil (starter oil)