The siding, which TEPSA built in 1989 on the terminal site located at the Muelle de la Energía (Energy Dock) in the Port of Barcelona, began with the loading of petroleum products (mainly diesel) and has been in sporadic operation since due to fluctuations in demand.

TEPSA launched a project in 2013 to modernise the Barcelona railway siding, initially investing in adapting the facilities to handle the loading and unloading of freight cars carrying chemicals. Early work involved the installation of meters, pumping equipment and the safety equipment needed to handle this type of product and in the adaption of the infrastructure for the loading and unloading of ISO containers.

The first product that put these improved facilities to a test is Monoethylene glycol (commonly known as MEG). A load of 208,000 kg was transported on 5 June on a convoy of four flatcars and eight ISO containers that were loaded through the inferior valve. The inauguration was attended by the other operators and organisations involved (Adif, Renfe, Logirail, Novapet and the Barcelona Port Authority).

The product is shipped from the Middle East to the TEPSA facilities by sea and stored for shipment by train to Selgua (Huesca), where the ISO containers are unloaded onto flatbed trucks to be transported by road to the production plant about 20 km away. The same run is expected to be performed once a week after this first test load.

In keeping with the Barcelona Port Authority TEPSA is committed to intermodal freight transport, that is, for the combination and integration of different modes of transport for stainable, quick and efficient transport. In this regard the company is considering incorporating the European gauge as part of the modernisation of the siding in order to be able to connect to the UIC general rail network that connects the Barcelona Port with France.