In this paper we have reexamined the published correlations for T-P-x-y data in order to obtain statistical proof that the correlations are in accordance with the databanks found in the open literature. In this process few new correlations were found to be with better accordance with data banks. After re-considerations we have concluded that new correlations proposed hereby have to be given the preference rather than the previously published correlations. (C) 2018 Elsevier B.V. All rights reserved.