supply of set of two nos air brake pipe , set of two nos air brake pipe 32 n.b. (f.p.) with socket 32 n.b. & flange 32 n.b. for box nhl. pipe as per wd - 08008-s-11, item - 3, alt.-7. socket flange as per wd - 08008- s-11 item -11 & 1 2, alt-7 and wd-83062-s-07, alt.-7 material specification of pipes as under, pipe 32 nb:-seamless to is 1239 (part1) heavy grade or astm a-106 gr. a, socket & flange :- is-2062-2011 amendent-1 of nov.20 12, gr. e 250 a for 32 nb pipe. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]