What is a enamel glass lined storage tank

Storage and handling of various corrosive media are common production processes in many industries such as chemical,pharmaceutical,and food.Glass lined storage tanks have become a popular choice for storage and reaction equipment in these fields due to their unique performance advantages.

1.Definition of enamel glass lined storage tank

Glass lined storage tank are made by coating ceramic glaze with high silicon content on the surface of a metal body,and then firing it at a high temperature of around 900℃to make the glaze tightly adhere to the surface of the metal iron body.It combines the strength of metal and the corrosion resistance of porcelain glaze,and can withstand the storage and reaction of various corrosive media such as strong acids and alkalis,providing a safe and reliable container for chemical production.

2.Structural composition
（1）Tank body
The tank body is the main part of a glass lined storage tank,usually made of rolled and welded steel plates.The material is generally made of ordinary carbon steel such as Q235B,which undergoes special processing and welding processes to ensure that the tank has sufficient strength and sealing.There are various shapes of tanks,commonly including vertical and horizontal ones.Vertical tanks have a small footprint and are suitable for places with limited space;Horizontal tanks are easy to install and transport,and are commonly used in situations where height is limited.
（2）Enamel glass layer
The enamel layer is the core part of the enamel glass lined storage tank,which uniformly covers the inner wall of the tank.The enamel layer has good corrosion resistance and can resist the erosion of various chemicals such as acids,alkalis,salts,etc.At the same time,the surface of the enamel layer is smooth,not easy to hang materials,and easy to clean and maintain.Its thickness is generally between 0.8-2.0mm,and different thicknesses are suitable for different working conditions and media.
（3）Head cover
The head is located at both ends of the tank,providing sealing and pressure bearing functions.Common head forms include elliptical head,disc-shaped head,and flat head.The elliptical head has the advantages of uniform stress distribution and reasonable stress distribution,and is widely used;The manufacturing process of disc-shaped heads is relatively simple and the cost is low;Flat head heads are generally used in low-pressure applications.
（4）Takeover and flange
Takeover is used to connect the tank body with external pipelines,achieving the entry and exit of the medium.The material and specifications of the takeover are selected based on the properties and flow requirements of the medium.Flanges are used to connect connecting pipes and other equipment or pipelines,ensuring the sealing and reliability of the connection.The flange of a glass lined storage tank is usually a special flange for glass lining,and its surface is also treated with glass lining to prevent corrosion of the flange by the medium.
（5）Attachment

The enamel glass lined storage tank is also equipped with some accessories,such as manholes,sight glasses,thermometer sleeves,level gauges,etc.Manholes facilitate personnel to enter the tank for inspection and maintenance;The sight glass can observe the liquid level and reaction situation of the medium inside the tank;Thermowell is used to install thermometers and measure the temperature of the medium inside the tank;The liquid level gauge is used to monitor the liquid level height of the medium in the tank in real time.

3.Performance characteristics
（1）Excellent corrosion resistance
The enamel layer can resist the corrosion of various chemical substances such as strong acids,strong bases,organic solvents,etc.,such as sulfuric acid,hydrochloric acid,sodium hydroxide,etc.This makes glass lined storage tanks have significant advantages in storing and handling corrosive media,effectively extending the service life of equipment and reducing production costs.
（2）Good sealing performance
The tank body and connecting pipes of the enamel glass lined storage tank are carefully designed and manufactured,using high-quality sealing materials and sealing structures to ensure that the tank body has good sealing performance.This can prevent medium leakage,avoid environmental pollution,and ensure the safety and stability of the production process.
（3）Smooth surface and easy to clean
The surface of the enamel layer is smooth,not easy to hang materials,and the medium is not easily residual.During the production process,the tank can be cleaned thoroughly through simple cleaning operations,reducing the risk of cross contamination and meeting the hygiene and cleanliness requirements of industries such as food and pharmaceuticals.
（4）A certain degree of temperature resistance
Glass lined storage tanks can be used within a certain temperature range,generally able to withstand temperature changes of-20℃to 200℃.However,it is important to avoid sudden temperature changes during use to prevent the enamel layer from breaking due to thermal stress.
（5）Good insulation performance
The enamel glass layer has good insulation performance,which can prevent electrochemical reactions between the medium and the metal tank,and reduce the occurrence of corrosion.At the same time,in some situations where electrostatic grounding is required,reasonable grounding measures can also be taken to ensure production safety.
4.Application Fields
（1）Chemical industry
In chemical production,many chemical reactions require specific conditions and involve various corrosive media.Glass lined storage tanks can be used to store and react various acid,alkali,and salt solutions,such as sulfuric acid,hydrochloric acid,sodium hydroxide,sodium chloride,etc.For example,in fertilizer production,it is used to store and react raw materials such as ammonia water and phosphoric acid;In dye production,it is used for storing and reacting various organic dye intermediates.
（2）Pharmaceutical industry
The pharmaceutical industry has high requirements for the hygiene and corrosion resistance of production equipment.Glass lined storage tanks can be used to store and react various pharmaceutical raw materials,intermediates,and finished products,such as antibiotics,vitamins,alkaloids,etc.Its smooth surface and good corrosion resistance can ensure the quality and safety of drugs,meeting the requirements of drug production quality management standards.
（3）Food industry
In the process of food processing,it is necessary to store and handle various acidic and alkaline food ingredients and additives.Glass lined storage tanks can be used to store fruit juice,vinegar,soy sauce,food additives,etc.Its corrosion resistance and easy cleaning characteristics can ensure the hygiene and quality of food,meeting the relevant standards of the food industry.
Glass lined storage tanks have been widely used in various industries such as chemical,pharmaceutical,food,and environmental protection due to their excellent corrosion resistance,good sealing,smooth surface,and easy cleaning properties.Understanding the definition,structural composition,performance characteristics,application areas,and maintenance points of glass lined storage tanks can help us select and use the equipment correctly,fully leverage its performance advantages,and ensure the safety and stability of production.