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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
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Steel pipe anti-corrosion is an important technology related to engineering safety, economic benefits and environmental protection. The following table summarizes the core value of anti-corrosion for steel pipes, hoping to help you quickly grasp the key points.
The core value of the dimension of anti-corrosion importance is reflected
💰 Economic efficiency significantly extends the service life of pipelines and avoids huge replacement and maintenance costs caused by corrosion leakage. The direct economic loss caused by steel pipe corrosion in our country is huge every year.
🛡️ safety effectively prevents catastrophic accidents such as leakage, explosion and fire caused by corrosion and perforation of pipelines, ensuring personal and property safety.
🌳 environmental and public safety greatly reduces the risk of pollution to soil, water sources and ecology caused by the leakage of conveyed media (such as oil, natural gas and chemicals). For water supply pipelines, dedicated anti-corrosion coatings (such as IPN8710) can ensure the hygiene of drinking water.
⚙️ Operational reliability reduces unplanned production halts caused by pipeline corrosion, ensuring the continuous and stable operation of systems such as energy transmission, water supply, and chemical production. The smooth anti-corrosion inner wall can also reduce the energy consumption for transportation.
🔬 Types and principles of corrosion
Understanding how corrosion occurs can help us better understand the necessity of anti-corrosion measures. Steel pipe corrosion is mainly electrochemical corrosion. You can imagine it as a slow "rust battery" reaction that occurs in steel pipes in specific environments (such as soil, water, and moist air) :
• Formation of galvanic cells:Uneven composition of the steel pipe itself or differences in the environment it is in can form anode and cathode zones.
• Anodic reaction:
In the anode region, iron (Fe) loses electrons and turns into iron ions (Fe²⁺) that dissolve into the surrounding medium, meaning the metal is corroded.
• Cathodic reaction:
In the cathode region, electrons are absorbed by substances in the environment, such as oxygen and water.
• Current loop:
Electrons flow from the anode to the cathode through the metal body, and the current forms a loop in the medium, allowing corrosion to continue.
In addition to uniform corrosion, the more harmful types are local corrosion, such as pitting corrosion (causing perforation), crevice corrosion and stress corrosion cracking, which are more concealed and sudden.
🛠️ Mainstream anti-corrosion technologies and applications
Modern anti-corrosion projects typically adopt a combined strategy of "outer coating + cathodic protection", taking both internal and external aspects into account.
External anti-corrosion technology for pipelines
Common coating techniques for the outer walls of buried or underwater pipelines include:
• Three-layer polyethylene anti-corrosion (3PE) : Combining epoxy powder, adhesive and polyethylene layer, it is currently recognized as one of the most outstanding anti-corrosion technologies and is widely used in long-distance pipelines such as oil and natural gas.• Fusion-bonded epoxy powder (FBE) : It forms a hard and highly adhesive film on the surface of steel pipes through electrostatic spraying and is often used in urban pipe networks.
• Epoxy coal tar asphalt anti-corrosion: Reinforced with glass cloth, it has a relatively low cost and is often used in medium and low pressure water transmission pipelines and chemical pipeline networks.
• IPN8710 series anti-corrosion coatings: Mainly used for the inner walls of pipelines, especially drinking water pipelines. Its coating film is dense, non-toxic and can resist microbial erosion.
Internal anti-corrosion technology for pipelines
For the contact surface between the inner wall of the pipeline and the conveyed medium:
• IPN8710 coating: As mentioned earlier, it is the preferred choice for drinking water pipes.• Cement mortar lining: Low cost, widely used in large-diameter water transmission pipelines, it can prevent water quality corrosion and scaling.
• Epoxy resin inner coating: Suitable for pipelines with special anti-corrosion requirements in industries such as petroleum and chemical engineering.
💎 Summary
Anti-corrosion of steel pipes is far more than just "applying a layer of paint"; it is a comprehensive protection system involving materials science, electrochemistry and engineering design. Its core value lies in avoiding huge future security risks and economic losses through a forward-looking investment.
The Importance Of Anti-corrosion For Steel Pipes
Subcategory
Keyword
- Details
-
Steel pipe anti-corrosion is an important technology related to engineering safety, economic benefits and environmental protection. The following table summarizes the core value of anti-corrosion for steel pipes, hoping to help you quickly grasp the key points.
The core value of the dimension of anti-corrosion importance is reflected
💰 Economic efficiency significantly extends the service life of pipelines and avoids huge replacement and maintenance costs caused by corrosion leakage. The direct economic loss caused by steel pipe corrosion in our country is huge every year.
🛡️ safety effectively prevents catastrophic accidents such as leakage, explosion and fire caused by corrosion and perforation of pipelines, ensuring personal and property safety.
🌳 environmental and public safety greatly reduces the risk of pollution to soil, water sources and ecology caused by the leakage of conveyed media (such as oil, natural gas and chemicals). For water supply pipelines, dedicated anti-corrosion coatings (such as IPN8710) can ensure the hygiene of drinking water.
⚙️ Operational reliability reduces unplanned production halts caused by pipeline corrosion, ensuring the continuous and stable operation of systems such as energy transmission, water supply, and chemical production. The smooth anti-corrosion inner wall can also reduce the energy consumption for transportation.
🔬 Types and principles of corrosion
Understanding how corrosion occurs can help us better understand the necessity of anti-corrosion measures. Steel pipe corrosion is mainly electrochemical corrosion. You can imagine it as a slow "rust battery" reaction that occurs in steel pipes in specific environments (such as soil, water, and moist air) :
• Formation of galvanic cells:Uneven composition of the steel pipe itself or differences in the environment it is in can form anode and cathode zones.
• Anodic reaction:
In the anode region, iron (Fe) loses electrons and turns into iron ions (Fe²⁺) that dissolve into the surrounding medium, meaning the metal is corroded.
• Cathodic reaction:
In the cathode region, electrons are absorbed by substances in the environment, such as oxygen and water.
• Current loop:
Electrons flow from the anode to the cathode through the metal body, and the current forms a loop in the medium, allowing corrosion to continue.
In addition to uniform corrosion, the more harmful types are local corrosion, such as pitting corrosion (causing perforation), crevice corrosion and stress corrosion cracking, which are more concealed and sudden.
🛠️ Mainstream anti-corrosion technologies and applications
Modern anti-corrosion projects typically adopt a combined strategy of "outer coating + cathodic protection", taking both internal and external aspects into account.
External anti-corrosion technology for pipelines
Common coating techniques for the outer walls of buried or underwater pipelines include:
• Three-layer polyethylene anti-corrosion (3PE) : Combining epoxy powder, adhesive and polyethylene layer, it is currently recognized as one of the most outstanding anti-corrosion technologies and is widely used in long-distance pipelines such as oil and natural gas.• Fusion-bonded epoxy powder (FBE) : It forms a hard and highly adhesive film on the surface of steel pipes through electrostatic spraying and is often used in urban pipe networks.
• Epoxy coal tar asphalt anti-corrosion: Reinforced with glass cloth, it has a relatively low cost and is often used in medium and low pressure water transmission pipelines and chemical pipeline networks.
• IPN8710 series anti-corrosion coatings: Mainly used for the inner walls of pipelines, especially drinking water pipelines. Its coating film is dense, non-toxic and can resist microbial erosion.
Internal anti-corrosion technology for pipelines
For the contact surface between the inner wall of the pipeline and the conveyed medium:
• IPN8710 coating: As mentioned earlier, it is the preferred choice for drinking water pipes.• Cement mortar lining: Low cost, widely used in large-diameter water transmission pipelines, it can prevent water quality corrosion and scaling.
• Epoxy resin inner coating: Suitable for pipelines with special anti-corrosion requirements in industries such as petroleum and chemical engineering.
💎 Summary
Anti-corrosion of steel pipes is far more than just "applying a layer of paint"; it is a comprehensive protection system involving materials science, electrochemistry and engineering design. Its core value lies in avoiding huge future security risks and economic losses through a forward-looking investment.
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Address: Hengtai Road,Daqiuzhuang Town,Jinghai County,Tianjin,China
Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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