The Downstream Glossary is a free encyclopedia developed for the
refining, petrochemical, and oil and gas transportation
industries. The Downstream Glossary is built by volunteers and
the Downstream Team. If you would like to add a term and
description to the Downstream Glossary you can email us using
the contact form. Browse by Category - Petroleum refining
converts crude oil into more useful products like fuels and
petrochemicals. Pure crude burns quickly and leaves behind
unwanted residue. Thus the oil needs to be separated and treated
before use.View all refining terms - Petrochemicals are
chemicals made from crude oil through the refining process. Some
petrochemicals can be made using coal or natural gas. There are
two main classes of petrochemical materials: olefins and
aromatics. View all petrochemical terms - Tankers serve a vital
role in the oil and gas industry. A tanker transports build
liquids or gasses via a large ocean-going vessel. Specialized
tankers are utilized to carry liquified or compress