Insights / Case Studies / Design, Engineering, Supply, Manufacturing, Testing, and Delivery of Columns for Nitrogen Gas PDH Unit.

Design, Engineering, Supply, Manufacturing, Testing, and Delivery of Columns for Nitrogen Gas PDH Unit.

Case Studies

Download PDF

A large PSU in natural gas processing and distribution in Usar, Maharashtra, required for their PDH Unit, columns of 1.38 meters diameter x 18.6 meters length x 40 millimeters thickness to operate at temperatures as low as -190°C (- 320°F) for handling Liquid Nitrogen. The use of advanced materials capable of withstanding extreme temperatures and corrosive environments was imperative for the project’s success.


The project encountered multifaceted challenges arising from demanding technical specifications and safety regulations. Fabricating columns capable of operating at –190°C (-320°F) while ensuring structural integrity and safety necessitated advanced engineering solutions. Compliance with ASME Boiler and Pressure Vessel Code (BPVC) standards for pressure vessel design and international safety protocols for handling cryogenic fluids, added complexity to the project. Specialized welding techniques like TIG (Tungsten Inert Gas) welding were crucial for creating leak-proof joints. Integrating additive manufacturing processes for complex components and adhering to stringent quality control measures posed significant challenges.


Completing this project has demonstrated technological advancements in the natural gas processing sector through innovative engineering solutions for extreme environments. The project also created employment opportunities and supported infrastructure development in Maharashtra. Adherence to safety regulations, including Occupational Safety and Health Administration (OSHA) guidelines underscored a commitment to worker safety and environmental responsibility.


ZETWERK’s involvement in this project was instrumental in overcoming the challenges and delivering exceptional results. Our expertise in residual design, engineering, supply chain management, and manufacturing excellence enabled us to meet the project’s stringent requirements within the specified time frame.

Our capabilities in additive manufacturing, material integration, and regulatory compliance ensured the quality and reliability of the columns with heavy thickness to operate in extreme environments.

As a company committed to pushing the boundaries of engineering excellence, we are proud to have successfully delivered the columns for the Usar PDH Unit.


Business Head – Oil & Gas

Download PDF Document