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The main reason for flange galvanic corrosion is that when different metals come into contact and an electrolyte (such as water or moisture) is present, a battery circuit is formed due to the potential difference, causing the metal with the lower potential to corrode. In particular, galvanic corrosion is likely to occur with combinations of metals that have a large potential difference, such as iron and stainless steel, or iron and aluminum. By inserting insulating materials between the contact points of flanges or between flanges and bolts/nuts, the battery circuit can be interrupted, preventing galvanic corrosion. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.

In a line handling strong acids and strong alkalis, the deterioration and leakage of gaskets occur frequently." "With glass-lined flanges, it is impossible to apply sufficient tightening force, resulting in unstable seals." "Every time maintenance is performed, we struggle to peel off gaskets that have adhered to the flanges." …These are serious sealing issues that arise daily in demanding environments such as chemical plants and pharmaceutical and food factories. To fundamentally solve these challenges, a high-performance sealing material that embodies the philosophy of "the right material in the right place" in its ultimate form is Nichias Corporation's "TOMBO No.9010" (Naflon PTFE cushion gasket), commonly known as the "wrapped gasket." This article will delve into the three significant benefits that this high-performance composite gasket brings to the field, how it can resolve the challenges you face, and provide specific guidelines for selecting the optimal product from a wide range of options, explained thoroughly from a professional perspective. *For detailed content of the column, please refer to the related link. For more information, feel free to download the PDF or contact us directly.

"I can't find the optimal gasket for the glass lining flange." "I want to achieve both high chemical resistance and flexibility that conforms to the distortion of the flange surface." "I heard that No.9010 is good, but the part numbers are too complicated, and I have no idea which one to choose." ... This is a serious issue faced by many site managers seeking high-performance sealing materials. The ultimate customized solution to this problem is Nichias Corporation's "TOMBO No.9010" (Naflon PTFE cushion gasket), commonly known as the "wrapped gasket." In this article, we will thoroughly explain the extremely complex part number system of this high-performance composite gasket, unraveling each one, and provide specific guidelines from a professional perspective to help you select the "suitable item" from countless combinations to address your challenges. *For detailed content of the column, you can view it through the related link. For more information, please download the PDF or feel free to contact us.

"In a line handling strong acids and strong alkalis, the degradation and leakage of gaskets occur frequently." "With glass-lined flanges, it is impossible to apply clamping force, resulting in unstable seals." "Every time maintenance is performed, we struggle to peel off gaskets that have adhered to the flanges." These are serious sealing issues that arise daily in demanding environments such as chemical plants and pharmaceutical and food factories. To fundamentally solve these challenges, the high-performance sealing material designed with the philosophy of 'the right material in the right place' is the 'fluororesin jacket gasket' from Valkar Co., Ltd. In this article, we will delve into the three significant benefits that this high-performance composite gasket brings to the field, how it can solve the challenges you face, and provide specific guidelines for selecting the right product from a wide range of options, explained thoroughly from a professional perspective. *For detailed content of the column, you can view it through the related link. For more information, please download the PDF or feel free to contact us.*

"In a line handling highly corrosive chemicals, leaks from flanges are absolutely unacceptable. Flanges with glass lining or resin lining cannot withstand high tightening forces." This presents the most demanding sealing challenge, requiring both advanced chemical resistance and the ability to conform to delicate flange surfaces. One solution to this challenge is the "Fluororesin Jacket Gasket" series from Vulcan Corporation. In this article, we will thoroughly explain why this high-performance composite gasket is trusted in many chemical plants, covering its basic structure, the differences among the four main core materials (N, S, H, F types) that determine its performance, and the essential precautions that must be followed for safe use, all from a professional perspective. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us directly.*

In a line handling highly corrosive chemicals, leaks from flanges are absolutely unacceptable. With flanges that are glass-lined or resin-lined, high tightening force cannot be applied. These are the most demanding sealing challenges that require both advanced chemical resistance and the ability to conform to delicate flange surfaces. One solution to this difficult problem is the 'Fluororesin Jacket Gasket' series from Vulcan Corporation. In this article, we will thoroughly explain why this high-performance composite gasket is trusted in many chemical plants, covering its basic structure, the differences among the four main core materials (N, S, H, F types) that determine its performance, and the essential precautions that must be followed for safe use, all from a professional perspective. *For detailed content of the column, please refer to the related links. For more information, please download the PDF or feel free to contact us.

"A pure PTFE gasket is concerning due to significant deformation (creep) caused by heat. I want to choose a reliable gasket with balanced performance for a line handling various chemicals." ...In response to the needs of environments where both chemical resistance and mechanical stability are required, the standard model of filled fluoropolymer gaskets is "Valkar No. 7020" (Valkalon Gasket) from Valkar Co., Ltd. This article will thoroughly explain why No. 7020 is commonly chosen in many chemical lines, from its structural secrets to specific data supporting its performance, as well as the correct knowledge for safe use, from a professional perspective. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

In plant and building piping systems, "corrosion" is the greatest risk factor that shortens the lifespan of equipment and can lead to serious accidents. Among these, "galvanic corrosion" (dissimilar metal contact corrosion) that occurs when different metals are connected progresses rapidly and is a phenomenon for which countermeasures are essential. The standard method to prevent this galvanic corrosion is the use of "insulation kits" (insulation bolts and gaskets). Among these, the "insulation lining bolt," which has the bolt shaft coated with fluororesin, is particularly excellent in terms of workability and reliability, and can resolve installation issues on-site (such as interference with gaskets). This article will thoroughly explain the mechanism of why "galvanic corrosion" occurs, why insulation lining bolts are supported on-site, their structural advantages and specifications, and the appropriate selection methods tailored to on-site standards. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

"The contamination of fluids with black foreign substances must be absolutely avoided," and "I want to prevent galvanic corrosion between dissimilar metal flanges." In the stable operation of a plant, there are many situations where such added value is required in addition to basic sealing performance. The high-performance sheet gasket "Vulcan No. SF300" (White Hyper) from Vulcan Corporation overcomes the challenges of conventional joint sheet heat resistance and combines two important properties: "cleanliness" and "insulation." This article thoroughly analyzes why SF300 is chosen in areas where cleanliness and insulation are required, comparing its performance with the standard type GF300. Furthermore, it provides a deep explanation from a professional perspective on the correct knowledge needed to safely harness its high performance. *For detailed content of the column, please refer to the related link. For more information, please download the PDF or feel free to contact us.*

"When different metals are combined, one side becomes abnormally rusty." "Corrosion is spreading around the bolts of the piping flange." These are typical problems caused by "galvanic corrosion," which is frequently encountered in plants and machinery. Galvanic corrosion can be effectively prevented by correctly understanding its mechanism and taking appropriate measures. This article focuses on "electrical insulation," one of the many preventive measures against galvanic corrosion, and provides a comprehensive explanation of specific methods and how to select suitable insulation products according to site conditions. *For detailed content of the column, please refer to the related links. For more information, please download the PDF or feel free to contact us.*

"In the line of strong acids and strong alkalis, the joint sheet deteriorates immediately." "At the dissimilar metal connections in the piping, corrosion due to electrolysis does not stop." "When using a PTFE gasket alone, the bolts loosened immediately and leaked." In chemical plants and precision equipment manufacturing lines, there are many situations where extremely high chemical resistance and electrical insulation properties are required, which cannot be addressed by common sealing materials. This article thoroughly explains why D7000 can simultaneously solve multiple challenges such as "corrosion resistance," "sealing performance," and "electrical insulation," as well as its unique hybrid structure and outstanding performance, along with the correct selection and usage methods to fully utilize its capabilities. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

In the maintenance of piping flanges, "electrolysis" is a serious issue that can shorten the lifespan of equipment and potentially lead to significant leakage accidents. Particularly, caution is required in piping lines that combine different types of metals. This page provides a detailed explanation of the mechanisms behind electrolysis and effective "insulation" measures to prevent it. *For more detailed information, you can view the related links. For further details, please download the PDF or feel free to contact us.*

We would like to introduce our "Electrolytic Corrosion Prevention Insulation Bolt." Our lineup includes a sleeve + washer type insulation bolt that excels in electrical resistance and tightening strength, as well as the ETFE integrated electrical insulation sleeve "T9019-Z" and the "Insulation Bolt Lining" designed to prevent electrolytic corrosion caused by contact between dissimilar metals. Please feel free to contact us when you need assistance. 【Sleeve + Washer Type Features】 ■ Excellent electrical resistance and tightening strength ■ Length of the sleeve can be specified ■ Two types of washer materials can be selected based on the usage temperature ■ Excellent light resistance and weather resistance, with very little aging change *For more details, please download the PDF or feel free to contact us.

Before taking measures against electrolysis, let's confirm the identity of the enemy once again. Electrolysis is a phenomenon where metals corrode due to electrical actions, and there are mainly two types. First, galvanic corrosion, which is a representative of electrolysis. When dissimilar metals (e.g., carbon steel bolts on stainless steel flanges) come into contact through an electrolyte such as water or condensation, a tiny battery (galvanic cell) is formed. Next is stray current corrosion. This occurs when current (stray current) leaking from railway tracks (using direct current) or other electrical equipment flows into nearby underground metal pipes through the ground and causes severe corrosion at the exit point when it flows back out into the earth. *For detailed content of the column, please refer to the PDF. For more information, feel free to contact us.

"When stainless steel pipes were used with carbon steel bolts, only the bolts rusted excessively. In the case of dissimilar metal connections in seawater piping, one of the metals became severely corroded." Do you have any experience with such "abnormal corrosion" of metals? It may not just be rust, but rather "galvanic corrosion." Galvanic corrosion progresses locally through a mechanism different from normal corrosion, and if left unchecked, it can lead to leaks from the piping, a decrease in equipment strength, and in the worst case, serious accidents. *For more details on the column, please refer to the related link. For more information, feel free to download the PDF or contact us directly.*