There are two pressure vessels which also serve as support for the beams.

The bundles are submerged in water inside a pressure vessel.

We even got invited to see inside the pressure vessel.

There is no pressure vessel in the ordinary sense of a boiler.

Each combustion zone no longer has to serve as a pressure vessel.

A pressure vessel is a large steel container about 10 inches thick.

This began to boil the water in the pressure vessel.

There is no need for a heavy pressure vessel.

Welding was not yet a developed technology, particularly for a pressure vessel.

Small pressure vessels are normally tested using a water jacket test.