Enterprise Products Partners LP said in July that it had executed a long-term agreement for incremental ethane transportation capacity on its Aegis pipeline. With the agreement, total capacity commitments for Aegis will ramp up over the next four years to more than 300,000 bbld.

The Aegis pipeline, which originates at Enterprise’s NGL fractionation and storage complex in Mont Belvieu, extends 270 miles to Napoleonville, La. The initial 60-mile segment between Mont Belvieu and Beaumont, Texas began service in September 2014. The remaining portion is scheduled for completion by the end of this year. Capacity on the pipeline can be expanded to about 400,000 bbld.

When completed, Aegis will be part of a 500-mile ethane header system stretching from Corpus Christi, Texas to the Mississippi River. The header system will serve as a major ethane supply artery for more than 20 petrochemical facilities expected to represent more than 90% of domestic ethylene production capacity by 2020.

“Enterprise is very pleased to enter into this agreement and provide the midstream services necessary to support the continued growth of the petrochemical industry along the Gulf Coast,” said Michael A. Creel, CEO of Enterprise’s general partner.