In high-temperature ranges from 800°F to 1500°F (427°C to 816°C), standard austenitic steels face the risk of intergranular corrosion. Jiangyin Zhonghai Precision Machinery Co., Ltd. specializes in manufacturing 321 (UNS S32100) and 321Ti (UNS S32168) stainless steel flanges, specifically engineered for these extreme environments.

By incorporating titanium (Ti) as a stabilizing element, our 321 series flanges offer exceptional resistance to chromium carbide precipitation and superior creep strength. Leveraging our integrated forging, heat treatment, and precision CNC machining capabilities, we deliver flanges in extreme pressure ratings (up to 2500lb) and massive dimensions (up to 4 meters) without compromising structural integrity.

Core Advantages
·Full-Spectrum Manufacturing: Our in-house production line—from forging to controlled heat treatment—ensures the stabilization properties of 321Ti are optimized for longevity.
·Global Compliance & Certification: ISO 9001 certified with PED, TUV, and TS credentials, ensuring our products meet the highest safety requirements for pressure equipment worldwide.
·Heavy-Scale Capabilities: We produce sizes from 1/2" up to 60", with the ability to handle single components weighing up to 10 tons and diameters up to 4 meters.
·Expert Customization: From complex blueprints to small-batch prototypes, we provide rapid assessment and technical consultation based on your critical parameters (OD, ID, thickness, hole patterns, etc.).

Key Features
·High-Temperature Stability: Maintains excellent mechanical properties and creep-rupture strength at temperatures exceeding 800°C.
·Intergranular Corrosion Resistance: The titanium-stabilized chemistry prevents sensitization during welding or service, drastically extending equipment lifespan.
·Precision Sealing Faces: Utilizing advanced CNC turning, we ensure that sealing surfaces (RF, RTJ, FF) exceed industry standards for tolerance and roughness.
·Rigorous Quality Control: Our independent QA department conducts comprehensive testing, including PMI, hardness, tensile, impact, and Ultrasonic Testing (UT).

Applications
Zhonghai's 321/321Ti flanges are the preferred choice for:
·Aerospace & Thermal Engineering: Jet engine exhaust manifolds and heat exchanger shells.
·Petrochemical & Refining: Catalytic cracking units and high-temperature piping headers.
·Power Generation: Boiler pressure piping and super-critical unit components.
·Chemical Processing: Vessels and reactors handling diluted inorganic/organic acids and strong oxidants.