Inter Pipeline Ltd. expects to decide by 2017 whether it will build two petrochemical plants that would convert propane to propylene and could be operational by 2021, as per calagryherald.com. The Calgary-based company assumed the option to build a US$1.8 bln petrochemical facility after it bought the Canadian assets of Oklahoma-based Williams Cos. for US$1.3 bln in September. The plant would convert locally sourced propane into propylene. Also under consideration is a second US$1.3 bln facility to convert propylene into polypropylene. It plans to decide on whether it will proceed with the plants mid-2017, with both facilities operational by mid-2021.