esign, engineering, manufacturing, procurement of materials and bought out components, including start-up / commissioning spares, assembly at shop, along with fabricated base plate, inspection by tpia, testing at manufacturers works, painting, seaworthy packing, supply & site work of special ball control valve 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-supply of special ball control valve at numaligarh refinery limited