In the rigorous environments of modern industry, the reliability of piping connections is paramount. Alloy Steel Flanges from Jiangyin Zhonghai Precision Machinery Co., Ltd. are specifically engineered to withstand high pressures, extreme temperatures, and complex mechanical stresses. Leveraging our integrated production lines for forging, heat treatment, and precision machining, we deliver both international standard components and complex, bespoke parts tailored to customer blueprints.

From 1/2-inch precision interfaces to massive 4-meter heavy industrial components, Zhonghai Precision combines deep metallurgical expertise with advanced manufacturing to ensure every alloy steel flange provides superior sealing and structural integrity at critical nodes.

Core Advantages
·Integrated Vertical Manufacturing: We maintain full control over the entire lifecycle—from in-house forging and heat treatment to CNC machining and performance testing. This ensures the microstructure of the alloy steel reaches peak performance levels.
·Global Certifications: ISO 9001 certified with PED (Pressure Equipment Directive) and TS (Special Equipment License) qualifications. All products comply with ASTM, ASME, EN, API, and other international standards.
·Extra-Large Scale Capability: With a single-component weight capacity of up to 10 tons and diameters up to 4 meters, we are among the few manufacturers capable of producing extra-large alloy steel flanges.
·Rapid Evaluation & Customization: We support everything from "small-batch prototypes" to "mass production." Provide us with your key parameters (OD, ID, thickness, bolt circle, etc.), and we will deliver a comprehensive solution including feasibility assessment, cost optimization, and rapid delivery.

Product Features
·Exceptional Mechanical Integrity: For alloy grades such as F11, F22, and F91, our controlled heat treatment processes ensure excellent creep resistance, oxidation resistance, and high-pressure resilience.
·High-Precision Machining: Utilizing CNC turning and precision drilling, we guarantee perfect sealing face parallelism and bolt hole accuracy, significantly reducing installation difficulty and leakage risks.
·Rigorous Quality Inspection: An independent QA department oversees a full suite of tests, including chemical analysis, mechanical property testing, and Non-Destructive Testing (NDT) such as UT and MT.
·Versatile Surface Treatments: Options include anti-rust oil, specialized painting, electro-galvanizing, or hot-dip galvanizing to suit diverse storage and operational environments.

Application Scenarios
Zhonghai Alloy Steel Flanges are trusted in sectors where safety is non-negotiable:
·Petrochemicals: High-pressure reactors, hydrocracking units, and transport pipelines.
·Energy & Power: Thermal power plant boilers, nuclear secondary circuits, and steam networks.
·Heavy Machinery: Pressure vessel interfaces and hydraulic system components.
·Offshore Engineering: Deep-sea drilling platforms and high-pressure fluid transfer systems.