supply of procurement of one set of nominal bore pipes and pipe etc. , one set of nominal bore pipes and pipe nut viz.for lhb coaches to drg no 1. brake pipe 25nb to drg. no. mi005808 ,alt c- 1 no, 2. brake pipe 25nb todrg. no. mi005809, alt b- 1 no, 3. brake pipe 25nb to drg. no. mi006331, alta- 1 no, 4. brake pipe 25nb to dr g.no. mi006330, alt nil - 1 no and 5.hex. pipe nut g 1 to ss gr aisi 304 is:3468-1991 - 4 nos. note:- 1.pipes shall conform to drawings of latest alteration. 2.for pipes and joints fo r air brakes to spec.no.04-abr-02,with amd-01 to 08. [ warranty period: 30 months after the date of delivery ] ]