supply of 1. pipe 32 bore for boxnhl (bmbs) 2. pipe 20 nb for boxnhl (mbs) wagon , pipe 32 bore for boxnhl (bmbs) as per rdsos drg. no. wd-09034-s-12, alt-08, item no.1, f itted with item no. 16 & 17. specification as per rdso spec. no. 04-abr-2019 (rev. 02 of dec. 2019). mate rial as per rdso letter no. mw/apb dt. 22/05/2020 stainless steel to astm-a312 schedule 40s gr. tp 304(e rw) [ warranty period: 30 months after the date of delivery ] ] , pipe 20 nb for boxnhl (mbs) wagon as per rdsos drg. no. wd - 09034 - s -12 alt - 8,item no.8 & 9 along with item no. 19 and 20 fitted in both side and pipe will be stainless steel to astm - a312 s chedule 40s gr. tp 304 (erw) (as per rdsos letter no. mw/apb dtd. 22.05.20). [ warranty period: 30 m onths after the date of delivery ] ]