supply of cartridge filters design, engineering, procurement, fabrication, inspection, testing, transportation, and supply of cartridge filters as per material requisition , purge hydrogen filter including supply of psvs as loose supply items if required as per code. , supervision charges per diem unit rate for supervision 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 ) , per diem 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 ) , per diem 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 ) , addition / deletion rate applicable for all items , unit rate per kg for addition or deletion of clips such as piping support clips. support clip with pad material: sa 516 gr 60n / 70n unit rate shall include mechanical design + fabrication + supply. insulation clips shall not be considered for this line item ( these shall be included in main supply ) , unit rate for reduction or increase per kg for lower skirt / leg support. this line item shall not be considered in case of no change on the skirt length / leg height as specified in respective mechanical datasheet for filter. skirt / saddle external support material - sa 516 gr 70n unit rate shall include mechanical design + fabrication + supply