Tender For corrigendum : design, engineering, manufacturing, procurement of materials and bought out components, assembly at shop, inspection including inspection by tpia, testing at manufacturers works, packing, supply of corrosion coupon - : design, manufacturing, inspection, testing, tpi charges, freight and material supply of corrosion coupon for the iocl, digboi refinery dr-1.0 expansion project as per specifications and documents mentioned in material requisition.