JIS B2220 16K Steel Flanges are medium-to-high pressure piping components designed in strict accordance with Japanese Industrial Standards. At Jiangyin Zhonghai Precision Machinery Co., Ltd., we leverage our full-scale manufacturing integration to produce 16K flanges that go beyond geometric compliance.

Through our internal forging process, we optimize metal grain flow, ensuring that our 16K series exhibits superior fatigue life and sealing stability under rated pressures exceeding 1.6 MPa (16 bar). Whether you require SOP (Slip-on Plate), SOH (Slip-on Hub), or WNH (Welding Neck Hub) types, Zhonghai delivers reliable solutions ranging from 1/2" to 60", including oversized non-standard components up to 4 meters.

Core Advantages
·Controlled In-house Production: With integrated forging, heat treatment, CNC machining, and testing facilities, we ensure every 16K flange maintains structural integrity under fluctuating pressure loads.
·Authoritative Certification: Our facilities are ISO 9001 certified and hold PED (EU Pressure Equipment Directive) and TS (Special Equipment License) qualifications, meeting the highest global safety and regulatory standards.
·Extreme Size Capability: We are among the few manufacturers capable of producing massive flanges up to 4 meters in diameter and 10 tons in weight, catering to heavy-duty industrial infrastructure.
·Rapid Customization: Beyond standard catalogs, we specialize in "Print-to-Product" services. Provide us with your critical parameters (OD, ID, PCD, thickness), and our technical team will provide an optimized manufacturing assessment and quote.

Product Features
·Superior Material Consistency: Strictly adhering to JIS grades (e.g., SS400, S25C, SUS304, SUS316), our internal heat treatment ensures uniform hardness and tensile strength across the entire batch.
·High-Precision Sealing Faces: Utilizing advanced CNC lathes, we achieve precise surface roughness for RF or FF faces, significantly enhancing the sealing performance with gaskets.
·Rigorous Inspection: To ensure 16K pressure safety, we offer non-destructive testing (UT, MT, or PT) upon request to verify the absence of cracks, inclusions, or porosity.
·Protective Surface Finishes: Options include anti-rust oil, black/yellow paint, electro-galvanizing, or hot-dip galvanizing for various corrosive environments.

Applications
JIS 16K steel flanges are the preferred choice for sectors with specific pressure requirements:
·Japanese Standard Engineering: Ideal for shipbuilding, machinery manufacturing, and chemical plants using Japanese design specs.
·Heavy Machinery Interfaces: High-strength connections for large hydraulic systems, compressors, and pump sets.
·Marine & Offshore: Used in ballast systems, fire-fighting lines, and fuel transfer piping.
·Power Generation: Heat exchanger ports and auxiliary steam line connections.