supply for emergency depressurising valves design, engineering, procurement, fabrication, inspection, testing, transportation, and supply of the emergency depressurising valves to be installed at numaligarh refinery limited(nrl), assam as per material requisition , emergency depressurising valve , emergency depressurising valve , unit rate forsupervision sevices of erection and commissioning / performance testing & training chrages 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 & training chrages 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 & training chragesas 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 )