JIS B2220 FLANGE

What Is JIS Standard for Flanges?

In industrial applications, the choice of common flange types is critical for ensuring the integrity and safety of piping systems. One prominent standard that governs the specifications for flanges in Japan is the JIS standard, specifically the JIS B 2220 flange. Established by the Japanese Industrial Standards (JIS), this standard outlines the dimensions, materials, and testing requirements for flanges used in various applications, including water and gas pipelines, chemical processing, and manufacturing.

The JIS B 2220 flange is designed to provide reliable connections in piping systems through a series of detailed specifications. It encompasses various types of flanges, including welding neck, slip-on, blind, and threaded options. These flanges are available in different sizes, pressure ratings, and materials, enabling engineers to select the appropriate flange that meets their project requirements.

One of the key advantages of using JIS B 2220 flanges is their compatibility with international standards. This makes it easier for engineers and procurement specialists to source flanges that can seamlessly integrate into existing piping systems, particularly in projects that involve collaboration between Japanese and international stakeholders. Furthermore, adherence to the JIS standard ensures that flanges maintain high quality, durability, and resistance to corrosion.

In conclusion, understanding the requirements of the JIS B 2220 flange is vital for anyone involved in the design or maintenance of piping systems. This standard not only facilitates interoperability but also promotes the overall efficiency and safety of industrial operations. As industries continue to evolve, the demand for reliable and high-quality components like JIS B 2220 flanges will remain steadfast, underscoring the importance of adhering to recognized standards. For engineers and project managers, making informed decisions about flange specifications can lead to enhanced system performance and longevity.

What Is the Difference Between JIS and ANSI Flange?

What are JIS and ANSI Flanges? 

JIS Flanges refer to the standards established by the Japanese Industrial Standard (JIS). The JIS B 2220 flange specification defines the dimensions, tolerances, and pressure ratings for flanges used in various industrial applications. JIS flanges are commonly found in Japanese manufacturing and are typically manufactured to metric dimensions.

ANSI Flanges, on the other hand, pertains to the standards set by the American National Standards Institute (ANSI). ANSI flanges often follow the American Society of Mechanical Engineers (ASME) standards, primarily ASME B16.5 for pipe flanges, which utilize inch-based measurements. ANSI flanges are prevalent in the United States and other countries that adopt these standards.

Key Differences Between JIS and ANSI Flanges

1. Measurement System:
One of the most significant differences between JIS and ANSI flanges is the measurement system used. JIS flanges utilize the metric system—typically expressed in millimeters—while ANSI flanges are based on the imperial system—expressed in inches.

2. Design and Pressure Ratings:
Flanges come in various pressure ratings, and JIS B 2220 flanges are categorized into different classes based on their pressure-handling capabilities. For example, categories such as 5K, 10K, and 16K indicate the different levels of pressure tolerance. In contrast, ANSI flanges are classified by ANSI classes, where common classes are 150, 300, 600, 900, 1500, and 2500, indicating their pressure ratings.

3. Application and Use:
The choice between JIS and ANSI flanges often depends on regional practices and specific application requirements. JIS B 2220 flanges are primarily used in Japan and are suitable for industries like energy, chemical processing, and water treatment. ANSI flanges are more common in North America and are widely used in similar sectors.

4. Bolt Patterns and Dimensions:
The bolt patterns and overall dimensions of JIS and ANSI flanges differ. JIS B 2220 flanges have specific bolt circle diameters, numbers of bolt holes, and hole diameters unique to the JIS standard, whereas ANSI flanges follow their own set of dimensions, which can lead to compatibility issues between the two if not properly matched.

JIS B 2220 Flange FAQs

Q1: What is the JIS B 2220 flange used for?

A1: The JIS B 2220 flange is widely used in various industrial applications to connect pipes, valves, pumps, and other equipment in a piping system. It is designed to provide a reliable and robust joint that can withstand high pressure and temperature conditions, ensuring the integrity of your piping system. Whether you’re in the oil, gas, chemical, or water treatment industry, this flange is an excellent choice for ensuring safe and efficient operations.

Q2: What materials are available for JIS B 2220 flanges?

A2: JIS B 2220 flanges are available in a variety of materials to suit different operating environments and requirements. Common materials include carbon steel, stainless steel, and alloy steel. Each material offers unique benefits, such as corrosion resistance and strength. When selecting a flange, consider the specific application and operating conditions to ensure you choose the right material for optimal performance.

Q3: Are JIS B 2220 flanges compatible with ISO or ANSI flanges?

A3: While the JIS B 2220 flange is a standard that follows Japanese Industrial Standards, it features compatibility aspects with certain ISO and ANSI flanges. However, it's crucial to verify the dimensions, pressure ratings, and bolt-hole patterns to ensure an appropriate fit. We recommend consulting with your engineering team or a flange specialist to confirm compatibility for your specific application.

Q4: How do I ensure proper installation of the JIS B 2220 flange?

A4: To ensure proper installation of the JIS B 2220 flange, begin by cleaning the flange surfaces to remove any dirt or debris. Use a suitable gasket material that complies with your specific application requirements and is rated for pressure and temperature. Align the flanges correctly and insert bolts uniformly to avoid uneven stress distribution. It’s vital to tighten the bolts to the recommended torque specifications to ensure a secure and leak-free connection.

Q5: What are the pressure ratings for JIS B 2220 flanges?

A5: JIS B 2220 flanges feature various pressure ratings, typically ranging from 5K to 20K pressure classes. The exact rating depends on both the flange size and the material used. When selecting the appropriate flange, always reference the manufacturer's specifications to ensure it meets the requirements of your specific application, as using a flange with an inadequate pressure rating can lead to failures or leaks.

Q6: Can I order custom sizes of JIS B 2220 flanges?

A6: We offer the option to order custom sizes of JIS B 2220 flanges to meet your specific engineering needs. Customization may include different diameters, thicknesses, or material grades. To place a custom order, please contact our customer service team with your specific requirements, and we’ll assist you in finding the right solution for your project.

JIS B2220 Flange Dimensions