air coolers (special material) design, engineering, manufacturing, procurement of materials and bought out components, assembly at shop, testing at manufacturers works, inspection by tpia, packing, supply of air coolers (special material) , circulation oil air coolercomplete tube fin bundle with bundle frame, air recirculation assembly, fan, supporting structures, walkways, ladders, motor with terminal box, vfd, instruments and all items as per mechanical data sheets and project specifications attached with material requisition. , hos overhead reflux air coolercomplete tube fin bundle with bundle frame, air recirculation assembly, fan, supporting structures, walkways, ladders, motor with terminal box, vfd, instruments and all items as per mechanical data sheets and project specifications attached with material requisition. , fractionator reflux air coolercomplete tube fin bundle with bundle frame, air recirculation assembly, fan, supporting structures, walkways, ladders, motor with terminal box, vfd, instruments and all items as per mechanical data sheets and project specifications attached with material requisition. , reactor effluent air coolercomplete tube fin bundle with bundle frame, air recirculation assembly, fan, supporting structures, walkways, ladders, motor with terminal box, vfd, instruments and all items as per mechanical data sheets and project specifications attached with material requisition. , unit rate forsupervision sevices of erection and commissioning / performance 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 / performance 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 / performance 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 )