(ICIS news)--Saudi Arabia's Yanbu National Petrochemical Co (Yansab) is set to export polyethylene (PE) and polypropylene (PP) from its new facility at Yanbu by end August or early September, a source close to the company said on Thursday. "The PE and PP plants are expected to achieve commercial production by early August, after which the company will start building inventory ahead of exports," the source said. Company officials were not immediately available for comment. The company has already begun trial runs at its new 1.3m tonne/year cracker and downstream plants. The complex includes a high density PE (HDPE) plant, which will also produce black PE 100 compounded pipe grade, a linear low density PE (LDPE) unit as well as a PP plant, each of them with a capacity of 400,000 tonnes/year.