supply of pipe 32 n.b. with sockets flangespipe 32 n.b. with sockets flanges,pipe 32 n.b. with sockets flanges & fixed flanges (welded assembly) for freight stock to rdso drg. no. wd-80007-s-11 alt-12, item no.3, 12, 13 & 14. socket and flanges to rdso drg. no. wd-83062-s-07- alt-6, items 2 & 3. fixed flange to drg. no. wd-83062-s-06-alt-4, item 1. other technical requirements confirming to specification no. 04-abr-2019 of april 2003, read with all amendments, latest amendments no. 8 of september 2016. 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, fixed flang:- is: 2062-2011, amendment 1 of nov.2012, gr e 250 a for 32 nb pipe. [ warranty period: 30 months after the date of delivery ] => limited