supply of surge tank, sluice valve and nut bolt for maintenance of govt owned and operated different m.i. installation under belda (ai) sub-division, under midnapore(ai) division,paschim midnapore. , supplying m.s. surge tank as per drawing, the body of which made of 5 mm thick ms sheet and top & bottom cover are made of 5mm thick ms sheet welded with body and strengthened with rib etc. all joints must be electrically welded to a leak proof condition and joints must be capable of withstanding pressure of 50 psi, the surge tank should be fitted with all accessories as specified in the drawing. entire surge tank is to be painted with a coat of priming and 80mm dia screwed at one end & std flange at other 3m long . , 150mm diac.i.sluice valve , supply of ms hexagonal head bolts & nuts bearing is - 1363 (part -i) / 1992 of product grade - c with latest amendments for bolts & is 1363 (part - 3) / 1992 of product grade - c with latest amendments for nuts properties / class for bolts - 4.6 & for nut - 4.5. both bolts & nuts are to be duly isi certification marked. a) 16 x 65 mm