supply of pipe 20 and 32 n.b. with sockets & flanges, pipe 32 n.b. with sockets & flanges ( welded assembly ) for freight stock to rdso drg. no. wd-8 0007-s-11 alt-12 or latest item no. 1, 12 & 13. socket and flanges to rdso drg. no. wd-83062-s-07, alt-6 or l atest, items 2 & 3. other technical requirements confirming to specification no. 04-abr-2019 ( rev-02 ) of dece mber 2019 or latest. material specification of pipes as under, pipes 32 nb:- seamless to is:1239 ( part-1 ) heavy grade or astm a-106 gr. a. socket & flange:- is-2062-2011, amendment-1 of nov. 2012, gr. e 250 a for 32 n b pipe. [ warranty period: 30 months after the date of delivery ] , pipe 32 n.b. with sockets & flanges ( welded assembly ) for freight stock to rdso drg. no. wd-8 0007-s-11 alt-12 or latest item no. 2, 12 & 13. socket and flanges to rdso drg. no. wd-83062-s-07, alt-6 or l atest, items 2 & 3. other technical requirements confirming to specification no. 04-abr-2019 ( rev-02 ) of dece mber 2019 or latest. material specification of pipes as under, pipes 32 nb:- seamless to is:1239 ( part-1 ) heavy grade or astm a-106 gr. a. socket & flange:- is-2062-2011, amendment-1 of nov. 2012, gr. e 250 a for 32 n b pipe [ warranty period: 30 months after the date of delivery ] , pipe 20 mm n.b. with socket & flange as per rdso drg no. wd-80007-s-11, alt-1 2 or latest, item no. 5, 15 & 16 and confirming to str no. 04-abr-2019 ( rev-2 of dec-2019 ) o r latest [ warranty period: 30 months after the date of delivery ]