Tenders for Supply of Stainless Steel Pipe Nps Confirming Rdso Drg No Rdso/Cg/Drg/23010 Item -19, 18, 17, 13, 3. As Per Annexure-I. Warranty Period: 30 Months After The Date Of Delivery Stainless Steel Pipe Nps Confirming Rdso Drg No Rdso/Cg/Drg/23010 Item -19, 18, 17, 13, 3. As Per Annexure-I. Warranty Period: 30 Months After The Date Of Delivery