In modern industrial applications, standard off-the-shelf flanges often fall short of meeting the unique demands of specialized equipment and extreme operating conditions. Jiangyin Zhonghai Precision Machinery Co., Ltd. specializes in the engineering and manufacturing of Non-Standard Forged Flanges.

We are more than a manufacturer; we are a solution provider. Leveraging our integrated in-house capabilities in forging, heat treatment, and large-scale machining, we transform customer blueprints or key parameters—such as OD, ID, thickness, bolt circle diameters, and material grades—into high-performance components. Whether it involves intricate structural designs, extreme dimensions, or rigorous material specifications, Zhonghai ensures every custom flange integrates seamlessly with your critical infrastructure.

Core Advantages
·Expert Blueprint Transformation: We support "Processing According to Drawings." Our technical team provides manufacturing feasibility assessments, optimizing forging paths and machining tolerances for specific application scenarios.
·Extreme Scale Capabilities: With the ability to forge and machine parts up to 4 meters in diameter and 10 tons in unit weight, we meet the most demanding requirements of heavy machinery and large pressure vessels.
·Vertically Integrated Production: Our internal facility houses forging, heating, CNC turning, drilling, and heat treatment lines, ensuring total control over mechanical properties and lead times.
·Global Compliance & Quality: Certified by ISO 9001, PED, and TS. Our independent QA department ensures all bespoke processes align with ASTM/ASME, EN, and API standards, delivering standard-setting quality for non-standard parts.

Product Features
·Superior Internal Grain Structure: Unlike simple plate cutting, our forging process ensures a continuous grain flow following the flange contour, significantly enhancing fatigue resistance and pressure-bearing capacity.
·Precision Dimensional Tolerance: Equipped with advanced CNC lathes and drilling centers, we achieve micron-level accuracy for complex geometries, specialized sealing grooves, and hole patterns.
·Broad Material Compatibility: We work with a wide spectrum of Carbon Steels, Stainless Steels (304/L, 316/L, 321), Alloy Steels, and Duplex Steels, with customized heat treatment (Normalizing, Quenching, Tempering) available.
·Flexible Production Scalability: We support everything from small-batch prototyping and R&D samples to full-scale mass production, adapting to your specific project lifecycle.

Applications
·Specialized Pressure Vessels: Custom interfaces for large reactors, heat exchangers, and high-pressure storage tanks.
·Heavy Machinery: Power transmission connections for tunnel boring machines (TBM), large hydraulic systems, and mining equipment.
·High-End Energy Equipment: Bespoke connectors for nuclear power components, wind turbine foundations, and offshore drilling platforms.
·Complex Piping Architectures: Piping networks in chemical and power sectors involving non-standard spans or irregular structures.