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.

In PIDEC, the most skillful and well-trained technical staff are organized to utilize the latest tools including Computer Aided Design techniques for the execution of oil, gas, petrochemical, petroleum refineries, power plants and generally, all other related industries projects. In these projects, PIDEC performs feasibility studies, project management, engineering, procurement services, purchasing and equipment supply and delivery, site supervision, managing contract, construction, commissioning and start-up. 

PIDEC makes full use of its own technical expertise, engineering resources companies, to carry out studies and execution of grass root projects or expansion, renovation and rehabilitation, or any type of investigation or technical services, both for the existing plants in operation and for the projects under progress.

PIDEC's current status and standing has enabled it to form joint ventures and/or cooperate in consortium type agreements with reputable international companies. Due to its international status, PIDEC has also been able to secure financial resources from foreign financial institutions in accordance with its customers' needs.