Tondgouyan petrochemical complex is one of the most prominent complexes of its kind in the Persian Gulf region (petrochemical special economic zone). Iran industrial network development company has been selected in the capacity of main contractor who could successfully accomplish and complete the above activities in the installation and erection of mechanical and electrical equipment, instrumentation, heavy lifts operations, pre-commissioning and assistance in commissioning activities. The prime duration of construction completion was estimated 20 months, utilizing approximately 7,000,000 man/hour up to project ending.