This feat is acheived by karnataka express 21 coaches when i travelling from Visakhpatnam to New Delhi in 1988 in the same section. Karanataka express used to have link express attached from vsp. Vijayawada dep 1325 New Delhi arrival 1625 . In 1998 Sep Sc-HWH falaknuma express acheived 100kmph in Bibinagar nadikudi guntur single line with 18 coahces with WDM 1 280km from Sc-GNT in just 3hr 50min