supply of pipe 32 n.b. with sockets flanges , pipe 32 n.b. with sockets & flanges (welded assembly) for freight stock to rdso drg. no . wd-80007-s-11 alt-12, item no. 2, 12 & 13. socket and flanges to rdso drg. no. wd-83062-s-07, alt -7, items 2 & 3.fixed flange to drg. no. wd-83062-s-06,alt-5. other technical requirements confirming to specification no. 04-abr-2019 (rev-2) of december 2019. material specification of pipes as under, p ipes 32 nb:- seamless to is:1239 (part-1) heavy grade or astm a-106 gr. a. socket, flange, fixed flang e:- is-2062-2011, amendment-1 of nov. 2012, gr. e 250 a for 32 nb pipe. [ warranty period: 30 mont hs after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]