tender for design, engineering, manufacturing, procurement of materials and bought out components, including start-up / erection & commissioning spares (if applicable / recommended by vendor), assembly at shop, inspection by tpia, testing at manufacturers works, packing, forwarding and shipment and supply of metal seated ball valves (nmbv-03) to be installed at numaligarh refinery limited (nrl), as per the enclosed tender standard specifications, job specification, data sheets etc. and other codes and standards attached or referred as per material requisition for numaligarh refinery limited, golaghat, assam, india. = limited