One of the largest project in Mahshahr economical special zone is 7^th olefin project which is designed to produce 1,100,000-ton ethylene, 200,000-ton propylene and 85,000-ton benzene annually.

IIND was responsible for all mechanical and erection operation and also installation of cracking heaters which include steel structure and all internal equipment related to the heaters.

IIND could successfully complete the construction activities, pre-commissioning and assistance for commissioning of the project, as per plan period on 2004.