MUMBAI, India, June 27 -- Intellectual Property India has published a patent application (202331087138 A) filed by Bharat Heavy Electricals Limited, Kolkata, West Bengal, on Dec. 20, 2023, for 'a method for assessing the local post weld heat treatment (pwht) of metallic pipes.'
Inventor(s) include Prakash Lakshminarayanan; Venkataraman Sudharsanam; Sankar Gopalan; and Balasubramanian Karuppudayar Ramaraj.
The application for the patent was published on June 27, under issue no. 26/2025.
According to the abstract released by the Intellectual Property India: "The invention relates to a method for assessing the local post weld heat treatment (PWHT) of metallic pipes using nomograms. The method comprises of generating two nomograms: the first for evaluating Through-Thickness Temperature Gradient (TTG), and the second for determining power source requirements. These nomograms are developed using Finite Element (FE) simulations considering various parameters and heat loss modes. Pipe dimensions are selected and analyzed using these nomograms to interpolate TTG and power needs, assessing the feasibility and adequacy of local PWHT. The method involves a faster, more energy-efficient method adaptable to various pipe sizes and integrates Finite Element (FE) simulations for precise assessments, significantly reduces the need for iterative trials, and ensures consistent outcomes with parameters altered from standards, making it highly beneficial for complex weldments in field conditions."
Disclaimer: Curated by HT Syndication.
