How is the fit between the storage tank lining and the tank body designed and guaranteed?
Release Time : 2024-12-12
In the key field of storage tank lining anti-corrosion, ensuring the high fit between the lining and the tank body is the cornerstone of long-term anti-corrosion. From the beginning of the design, it is necessary to consider multiple factors to ensure the fit accuracy.
At the design level, engineers carefully plan according to the shape, size and expected bearing pressure of the tank body. For common vertical cylindrical tanks, the dimensional tolerances in the circumference and height directions are accurately measured, and appropriate expansion and contraction are reserved when the lining material is cut and prefabricated. The installation process is simulated by computer-aided design, and the deformation trend of the material under different working conditions is estimated to ensure the initial size matching. For special-shaped parts, such as the bottom corner of the tank body and the curvature of the top head, special-shaped lining modules are tailored, and the splicing method is optimized through three-dimensional modeling to ensure seamless fit.
Preparation before construction is a key link. The surface pretreatment of the tank body follows strict standards, and the sandblasting and rust removal reaches Sa2.5 level or above, which completely removes impurities such as rust and oil, so that the metal surface presents a uniform and rough micro-texture and enhances the adhesion of the lining. Use a high-precision roughness measuring instrument to control the surface roughness value, meet the requirements of the lining material, and lay a solid foundation for close fitting.
In terms of construction technology, if spray lining is used, the spray gun parameters, such as spray angle, distance, and pressure, are accurately controlled to ensure uniform and stable adhesion of atomized particles; roller coating focuses on the consistency of roller brush strength and direction to avoid missing coating and uneven thickness. For adhesive lining, special adhesives are scientifically formulated according to the material of the tank body and the characteristics of the lining, and the coating is evenly applied and the thickness of the adhesive layer is controlled to ensure bonding strength. During the entire construction process, the distance between the lining and the tank body is monitored in real time with the help of a laser rangefinder, and deviations are calibrated in time.
Poor fitting is the enemy of corrosion protection. Tiny gaps open up a "green channel" for corrosive media, allowing acidic and alkaline liquids to quietly penetrate and react with the tank metal to form rust. The expansion force causes the lining to bulge and peel off locally, accelerating the spread of corrosion. Poor fit also causes uneven force on the lining. Under pressure fluctuations during the filling and discharging of storage tanks, it is easy to cause the lining to tear, which damages its integrity, exposing a large area of tank metal to the corrosive environment, and the protective barrier collapses. In a short period of time, the storage tank may leak due to corrosion perforation, threatening production safety and the environment, and the anti-corrosion efforts invested in the early stage will go to waste. Therefore, strict control of fit throughout the entire process does not allow for any slackness.
At the design level, engineers carefully plan according to the shape, size and expected bearing pressure of the tank body. For common vertical cylindrical tanks, the dimensional tolerances in the circumference and height directions are accurately measured, and appropriate expansion and contraction are reserved when the lining material is cut and prefabricated. The installation process is simulated by computer-aided design, and the deformation trend of the material under different working conditions is estimated to ensure the initial size matching. For special-shaped parts, such as the bottom corner of the tank body and the curvature of the top head, special-shaped lining modules are tailored, and the splicing method is optimized through three-dimensional modeling to ensure seamless fit.
Preparation before construction is a key link. The surface pretreatment of the tank body follows strict standards, and the sandblasting and rust removal reaches Sa2.5 level or above, which completely removes impurities such as rust and oil, so that the metal surface presents a uniform and rough micro-texture and enhances the adhesion of the lining. Use a high-precision roughness measuring instrument to control the surface roughness value, meet the requirements of the lining material, and lay a solid foundation for close fitting.
In terms of construction technology, if spray lining is used, the spray gun parameters, such as spray angle, distance, and pressure, are accurately controlled to ensure uniform and stable adhesion of atomized particles; roller coating focuses on the consistency of roller brush strength and direction to avoid missing coating and uneven thickness. For adhesive lining, special adhesives are scientifically formulated according to the material of the tank body and the characteristics of the lining, and the coating is evenly applied and the thickness of the adhesive layer is controlled to ensure bonding strength. During the entire construction process, the distance between the lining and the tank body is monitored in real time with the help of a laser rangefinder, and deviations are calibrated in time.
Poor fitting is the enemy of corrosion protection. Tiny gaps open up a "green channel" for corrosive media, allowing acidic and alkaline liquids to quietly penetrate and react with the tank metal to form rust. The expansion force causes the lining to bulge and peel off locally, accelerating the spread of corrosion. Poor fit also causes uneven force on the lining. Under pressure fluctuations during the filling and discharging of storage tanks, it is easy to cause the lining to tear, which damages its integrity, exposing a large area of tank metal to the corrosive environment, and the protective barrier collapses. In a short period of time, the storage tank may leak due to corrosion perforation, threatening production safety and the environment, and the anti-corrosion efforts invested in the early stage will go to waste. Therefore, strict control of fit throughout the entire process does not allow for any slackness.