Ludvig Nobel invented oil tankers, and better
refineries,
pipelines. Before 1880, the United States was Russia's teacher in most aspects of the oil business. The roles were reversed in some respects by Nobel. A
Batumi oil refinery plant was constructed 1927–1929, to refine the oil brought from
Baku at the
Caspian Sea to Batumi at the
Black Sea by pipeline. The oil business lacked technical know-how and scientific methodology. To rectify this, Nobel established technical chemical research labs in Baku. These research centers were very active, and when something of commercial interest was found, Nobel was fast in trying the new products out on a large scale. Dozens of scientists were employed, finding ways to treat oil, developing new uses for oil, and developing products derived from oil. Nobel was the first to experiment with carrying oil in bulk on single-hulled barges. Turning his attention to self-propelled tankships, a primary concern was to keep the cargo and fumes well away from the engine room to avoid fires. Other challenges included allowing for the cargo to expand and contract due to temperature changes, and providing a method to ventilate the tanks. The world's first successful
oil tanker was Nobel's
Zoroaster. He designed this in
Lindholmen-Motala in Sweden with Sven Alexander Almqvist. Together they solved the issue of putting oil in the bulk of a ship without it getting unstable, through putting the oil in tanks. The contract to build it was signed in January 1878, and it made its first run later that year from Baku to
Astrakhan. The design was widely studied and copied, with Nobel refusing to patent any part of it. In October 1878, he ordered two more tankers of the same design: the
Buddha and the
Nordenskjöld. The first tank steamer of the United States was built after drawings and calculations of Nobel after his 1888 death in
Cannes. ==Humanitarian efforts==