Tenders for Supply of Pipe 15Nb For Rapid Discharge Hopper Wagon Type Bobrn Wagon To Rdso S Drg.No.Wd-91071-S-75, Alt.2, Item-13 Sheet 1 Of 2. Matl.& Specn.Is:1239/90 5Th Rev. Part I Heavy. As Per Drawing. Warranty Period: 30 Months After The Date Of Delivery