In this novel concept waste heat is recovered from the outlet process streams of primary reformer and high temperature shift convertor (HTSC) of the 1.5 ton/hr hydrogen gas plant at United Industries Limited (UIL), Faisalabad, Pakistan. Waste heat is utilized, and heat recovery steam generation (HRSG) system is designed. UIL's hydrogen gas plant with HRSG system is modelled and simulated on Aspen HYSYS. The heat recovery from UIL's hydrogen gas plant is used for generating steam of 1.5 MPa, 750 ^oC @ 1900 kg/hr flow. The steam generation system (SGS) has been proposed and installed at UIL's hydrogen gas plant where waste heat recoveries of 4.5 GJ/hr and 2.8GJ/hr from outlets streams of primary reformer and high temperature shift convertor has been obtained successfully.