Pressure vessels mainly have three forms: round, simple, spherical and rectangular. Rectangular vessels are mostly used as small atmospheric storage tanks because of their poor pressure bearing capacity; Spherical vessels are usually used as large and medium-sized storage tanks with certain pressure due to manufacturing reasons; For cylindrical vessels, due to easy manufacture, convenient installation of Internals and good pressure bearing capacity, they are most widely used in industry. Thin wall cylindrical pressure vessels are usually made of steel plate by coil welding. It is generally composed of cylinder, head, support, flange, sealing device, safety accessories and instruments, manhole, process nozzle, etc
Cylinder and head
The cylinder and head are the main pressure components constituting the container space. According to different geometric shapes, the cylinder can be divided into cylindrical, conical, spherical, elliptical, rectangular, etc; The head can be divided into flat cover, dish, hemispherical, spherical crown, oval, conical head etc.
Supports are components used to support and secure equipment. According to the different structural forms of pressure vessels, there are three common forms: vertical vessel support, horizontal vessel support and spherical vessel support. The vertical vessel supports include: leg support, supporting support, ear support and skirt support; Horizontal vessel supports include: supporting, saddle and ring supports. Among them, saddle support is the most widely used, while column or skirt support is mostly used for spherical vessels. The selection of support form is mainly based on the quality, structure, load and operation and maintenance requirements of the container.
Safety accessories and instruments
In order to ensure the safe, stable and reliable operation of pressure vessels, it is often necessary to set some safety accessories on the vessels.