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Pressure Vessel Applications Are The Most Common
Oct 30, 2017

Pressure vessels generally refer to sealed containers used in industrial production for the production of gases or liquids for the production process, such as reaction, mass transfer, heat transfer, separation and storage, and capable of carrying a certain pressure. It is widely used in petroleum, chemical, energy, metallurgy, machinery, textile, pharmaceutical, defense and other industrial fields.

Pressure in the pressure vessel can come from two aspects, Pressure Vessel and Pressure Pipe Component one is the pressure outside the container (increased), and the second is the pressure inside the container (increased).

1) the maximum working pressure, Pressure Vessel and Pressure Pipe Component more refers to the normal operation of the case, the top of the container may appear the highest pressure.

2) design pressure, refers to the corresponding design temperature to determine the thickness of the container shell pressure, that is, marked on the nameplate of the design pressure, the pressure vessel design pressure value shall not be lower than the maximum working pressure; when the container Parts or pressure components to withstand the static pressure of the liquid column to 5% of the design pressure, Pressure Vessel and Pressure Pipe Component you should take the design pressure and the static pressure of the column and the location of the design or calculation of components; with a safety valve pressure vessel, Pressure Vessel and Pressure Pipe Component its design The pressure should not be lower than the opening pressure or burst pressure of the safety valve. The design pressure of the container shall be determined according to the corresponding provisions of "steel pressure vessel" GB 150-1998.

(3) temperature

1) operating temperature, refers to the internal working medium in the container during the normal operation of the temperature, that is, the medium temperature.

2) metal temperature, refers to the container pressure components along the thickness of the average temperature. In any case, the surface temperature of the component metal shall not exceed the permissible temperature of the steel.

3) Design temperature refers to the maximum or minimum temperature at which the container wall or component metal may reach the corresponding design pressure during normal operation. When the temperature of the shell or element metal is below -20 ° C, the design temperature is determined at the lowest temperature. In addition, Pressure Vessel and Pressure Pipe Component the design temperature is selected at the highest temperature. The design temperature value shall not be lower than the maximum metal temperature that the component metal may reach; for metal temperatures below 0 ° C, the design temperature shall not be higher than the minimum metal temperature that the component metal may reach. Pressure Vessel and Pressure Pipe Component The design temperature of the container (ie, the design medium temperature on the nameplate of the container) refers to the design temperature of the housing.

(4) medium

The production process involves a wide variety of media, there are a variety of classification methods. According to the classification of physical properties, there are combustible, flammable, inert and combustion of four; according to their degree of human toxicity, but also can be divided into extreme hazards (such as gas, liquid, liquefied gas, (Ⅲ), mild hazard (Ⅳ) four; according to their corrosiveness to the container material can be divided into strong corrosive, weak corrosive, non-corrosive.

Pressure vessel is usually found by the cylinder (also known as the shell), the head (also known as the end cap), flange, sealing components, openings and take over (manhole, hand hole, mirror hole, Bit, flow meter, temperature control, safety valve, etc.) and bearing and other various components.

Pressure vessels are widely used in industrial, petrochemical, pharmaceutical, metallurgical, mechanical, mining, power, aerospace, transportation and other industrial production sectors. They are also common in agriculture, civil and military sectors, especially in petrochemical industry The most common, the petrochemical enterprises in the tower, kettle, tank, tank are all storage or as equipment shell, and the vast majority of the pressure temperature is running, such as an annual output of 300,000 tons of ethylene plant, about 793 sets of equipment, Pressure Vessel and Pressure Pipe Component including pressure vessels 281 units, accounting for 35.4%. Steam boilers are also pressure vessels, but it is a special pressure vessel with direct flame heating. As for liquefied petroleum gas cylinders for civil or factory use, it is everywhere.