Hi Eswar Nanda,

List of Petrochemical engineering colleges in Andhra Pradesh are .

• Andhra University College of Engineering, VIshakapatnam
• Jawaharlal Nehru Technological University College of Engineering, Kakinada.
• Government Institute of chemical engineering

All these colleges comes under government. I have attached link for more information regarding admission, fees , Placements etc.

https://engineering.careers360.com/colleges/list-of-petrochemical-engineering-colleges-in-andhra-pradesh

Private colleges in Andhra pradesh are ..

• Vignan's Foundation for Science, Technology and Research, Guntur
• Godavari Institute of engineering and Technology  (GIET), Rajahmundry
• Sri Aditya Engineering College(SAEC), East Godavari.
• Mohammadiya Institute of Engineering (MIE), Armoor.

This are some colleges i have listed available with petrochemical Engineering for Bachelors program. Hope this information helps you. Good luck for admission.

Thanks..