How are Indian Oil Corporation bitumen emulsion prices structured by grade, region, and bulk volume?

IOCL pricing is typically tiered by emulsion grade group, delivered location, and contract volume. Grade affects bitumen residue level, emulsifier package, and QA documentation, which shifts base price. Region mainly changes freight, terminal availability, and local taxes or duties, so ex plant and delivered rates can differ significantly. Bulk volume usually triggers slab discounts, tanker pricing versus drums, and better payment terms under annual rate contracts. Government tenders may use indexed bitumen linkage plus conversion and logistics adders rather than fixed retail style lists.