cs air coolers design, engineering, manufacturing, procurement of materials and bought out components, assembly at shop, testing at manufacturers works, inspection by tpia, packing, supply of the cs air coolers , naphtha stabilizer overhead condenser ( 1p30-ea-1051 ) , naphtha product air cooler ( 1p30-ea-1251 ) , top reflux air cooler ( 1p30-ea-2151 ) , vgo air cooler ( 1p30-ea-2152 ) , hos overhead product air cooler ( 1p30-ea-2452 ) , flare liquid cooler ( 1p30-ea-6151 ) , hdt diesel product ( 1p31-ea-2651 ) , hdt vgo product cooler ( 1p31-ea-2851 ) , vgo filter backwash air cooler ( 1p31-ea-2852 ) , pure condensate air cooler ( 1p30-ea-5651 ) , one ( 1 ) package consist of following four air cooler -suspect atmospheric flash condenser- tag no 1p30ea-5652 -suspect condensate cooler- tag no 1p30ea-5653 -blowdown atmospheric flash condenser- tag no 1p30-ea-6551 -blowdown condensate cooler, tag no 1p-ea-6552 , unit rate forsupervision sevices of erection and commissioning / testing as per details mentioned in material requisition for quoted items as per enclosed instructions to vendor per diem charges upto 8 hrs on normal working days. ( bidders to quoteunit rate for diem charges ) , unit rate forsupervision sevices of erection and commissioning / testing as per details mentioned in material requisition for quoted items as per enclosed instructions to vendor overtime rate per hour ( beyond normal 8 hours on normal working days ) . ( bidders to quote over timerate per hour ) , unit rate forsupervision sevices of erection and commissioning / pe testing as per details mentioned in material requisition for quoted items as per enclosed instructions to vendor overtime rate per hour for work on weekly off days / holidays ( as applicable to refinery site ) . ( bidders to quote over timerate per hour )