Supply of Air Brake Pipe 15 Nb Heavy Duty With Flange & Socket As Per Rdso Drg. No. Wd-96021-S-12 Alt-5, Item No. 9, 17 &18. Confirm To Rdso Str-04-Abr-19 Rev.-2 Of Dec 2019. Material For Item No. 9 Is Stainless Ste El To Astm- A312 Scheduled 40S Gr. Tp 304 Erw And For Item No. 17 & 18 As Per Drg. Warranty Period: 30 Months After The Date Of Delivery