Industry Overview: Ethylene is one of the most important raw materials in the petrochemical industry. The use of ethylene involves the production of polyethylene plastics like high density polyethylene (HDPE), linear low density polyethylene (LLDPE) and low density polyethylene (LDPE). There are three different ways to produce ethylene which are: steam cracking of naphtha, ethane and gas oil among which production by naphtha is common in Middle East region. Iran as a major country in the region with abundant gas reserves has a key role in the market. Iran’s three major Ethylene producer companies are: