Q235B Carbon Steel Flanges are the backbone of modern industrial piping, celebrated for their exceptional weldability, excellent plasticity, and superior cost-performance ratio. At Jiangyin Zhonghai Precision Machinery Co., Ltd., we elevate this versatile material through precision forging, ensuring that every flange delivers structural integrity and sealing reliability that far exceeds industry baseline standards.

Powered by our fully integrated in-house manufacturing, we offer a comprehensive range from 1/2" to 60". We specialize in extreme-scale customization, capable of producing flanges up to 4 meters in diameter and 10 tons in weight. Whether it is a standard component or a custom-engineered interface, Zhonghai delivers a one-stop solution from forging to final precision machining.

Core Advantages
·Integrated Manufacturing Excellence: With in-house forging, heat treatment, and CNC machining, we eliminate third-party quality risks and maintain strict control over the entire production cycle.
· International Certifications: Our ISO 9001, PED, and TS credentials ensure that our products meet the most demanding safety and regulatory standards globally.
· Heavy-Duty Specialization: We are among the few manufacturers capable of handling components up to 10 tons and 4 meters, providing reliable solutions for massive infrastructure and heavy machinery.
· Rapid Evaluation & Bespoke Delivery: By providing your blueprints or key parameters (OD, ID, Thickness, Hole Pattern), our team offers rapid technical assessment and quick-turnaround production.

Key Features
·Optimized Weldability: The moderate carbon content of Q235B ensures stable welding with minimal risk of cracking, simplifying on-site installation.
·Superior Forged Grain Structure: Unlike standard plate-cut flanges, our forged process preserves the natural metal flow lines, significantly enhancing pressure and impact resistance.
· High-Precision Tolerances: Using advanced CNC lathes, we achieve precise surface finishes and bolt hole alignments for leak-proof performance across pressure classes from 150LB to 2500LB.
· Protective Surface Treatments: Options including anti-rust oil, black/yellow painting, electro-galvanizing, or hot-dip galvanizing are available to suit specific environmental conditions.

Applications
Zhonghai Q235B Flanges are ideally suited for low-to-medium pressure and general temperature industrial scenarios:
·Municipal Infrastructure: Urban water supply, drainage, and thermal heating networks.
· General Machinery: Connection interfaces for pumps, valves, compressors, and tanks.
·HVAC & Fire Protection: Industrial heating, ventilation, and fire safety piping systems.
· Environmental Protection: Exhaust gas treatment, dust collection lines, and light chemical transport.
· Storage Tank Components: Manholes and nozzle flanges for large-scale atmospheric or low-pressure vessels.