supply of tee flange 20 x 20 x 15 nb , tee flange 20 x 20 x 15 nb. drawing no :- wd - 94056 - s - 01, alt. 1, item no. 2 . spec. no :- 04 - abr -2002 (rev. 1 of nov. 2017). warranty / guarantee :- the warranty / guarantee period will be 30 months from the date of delivery or 24 months from the date of commissioning whichever i s earlier. inspection :- i) further all the necessary inspections shall be carried out as per para-12 and clauses contained therein as per rdso spec. no. 04 - abr - 2002(rev. 01 of nov. 2017). [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]