The JIS B2220 5K series is a light-pressure rating flange designed in accordance with Japanese Industrial Standards, widely utilized in low-to-medium pressure piping systems. Jiangyin Zhonghai Precision Machinery Co., Ltd., an ISO 9001-certified manufacturer, leverages its extensive forging expertise to provide high-quality JIS 5K flanges to the global market.

Our offering includes standard SOP (Slip-on Plate), SOH (Slip-on Hub), and BL (Blind) flanges. Beyond standard specifications, our integrated forging, heat treatment, and CNC machining lines allow us to rapidly evaluate and manufacture customized components based on client blueprints. Whether for high-volume orders or complex, non-standard structures, Zhonghai ensures every flange meets the exact dimensional and metallurgical requirements of the JIS standard.

Core Advantages
·Full-Chain Manufacturing: We control the entire process from raw material forging and heat treatment to CNC turning and surface finishing, ensuring consistent quality throughout.
·International Certifications: Holding PED, TUV, and TS qualifications, our production follows international technical standards to meet stringent project compliance requirements.
·Flexible Customization: We support everything from small-batch prototypes to mass production. Provide us with your drawings or key parameters (OD, ID, PCD, etc.), and we will deliver an optimized manufacturing solution.
·Extensive Scale: Our capabilities cover sizes from 1/2" to 60", with a maximum machining diameter of 4 meters and a single-part weight of up to 10 tons.

Product Features
·Optimized Geometry: The 5K rating is designed for efficiency, reducing overall system weight while maintaining reliable connection strength.
·High Machining Precision: Advanced CNC turning and drilling ensure precise face flatness and bolt hole alignment, significantly improving on-site installation efficiency.
·Reliable Mechanical Integrity: Our forging process eliminates internal defects, enhancing the mechanical strength and impact resistance compared to cast alternatives.
·Surface Protection: Various treatments including anti-rust oil, painting, or galvanizing are available to ensure corrosion resistance during transport and service.

Applications
·Shipbuilding & Marine Engineering: Ballast, freshwater, and fire-fighting systems following Japanese standards.
·Water Treatment: Municipal water supply, industrial cooling loops, and wastewater processing.
·HVAC & Civil Industry: Low-pressure steam, air conditioning water systems, and general fluid transport.
·Equipment Integration: Standardized interfaces for Japanese-designed machinery, storage tanks, and pressure vessels.