Tenders for Supply of Air Brake Pipe Size 20 Mm With Flange And Socket To Rdso Drg. No. Wd-80007-S-11 Alt-9 Or Latest, Item No. 8. To Str No. Rdso Str-04-Abr-19 Rev.-2 Of Dec 2019.Material Of Pipe Stainless Steel To Astm-A312 Schedule 40S Gr. Tp 304 Erw