Petrochemical Industries Design and Engineering Company (PIDEC), as a leading engineering design and consulting company in the fields of oil, gas and petrochemical industries, was originally established in 1985 as one of the subsidiaries of National Petrochemical Company of Iran. In 1994, however, PIDEC was transferred, as a private company, to the holding of the Erection and Construction Company (ECC), which was established in August 1989 with the blessing of the National Petrochemical Company of Iran.