RAS LAFFAN, Qatar — The temperature hovered around 100 degrees on the jetty here, where a set of pipes were connected to a giant red-hulled ship. But the moisture in the air froze on the pipes and flaked off, creating snowlike flurries on the early summer evening.

The incongruous sight is common on the Qatari ship, the Al Rekayyat, which carries a frigid fuel known as liquefied natural gas.

Natural gas, when chilled to minus 260 degrees, turns into a liquid with a fraction of its former volume. The process has reshaped the natural gas business, allowing the fuel to be pumped onto ships and dispatched around the world.

After investing tens of billions of dollars, Qatar is at the forefront. Part of the emirate’s fleet, the Al Rekayyat, run by Royal Dutch Shell, goes to Fujian in China and Yokkaichi in Japan, as well as Dubai and Milford Haven in Wales.