Large EPC conveyor projects require more than a unit-price comparison between conveyor roller suppliers. This guide shows procurement and engineering teams how to prequalify suppliers, prepare comparable RFQs, evaluate bearings, seals, shafts and frames, review technical submittals, control deviations, verify manufacturing and inspection capability, and normalize bids before commercial evaluation. It also provides practical supplier red flags, an EPC evaluation framework and an RFQ checklist for reducing specification, documentation, delivery and installation risks.