The EN1092-1 Type 11 Flange (Weld Neck Flange) is a premium connector designed according to European steel flange standards. Its characteristic long tapered hub provides vital structural reinforcement, transferring stress from the flange to the pipe, which significantly improves resistance to vibration and high-pressure impacts.

Jiangyin Zhonghai Precision Machinery Co., Ltd. integrates in-house forging expertise with high-precision CNC machining to ensure that every Type 11 flange possesses a superior metal grain flow. Whether your project requires PN6 for general utility or PN400 for extreme high-pressure challenges, Zhonghai delivers dimensionally accurate, high-integrity solutions, supporting both standard production and full customization based on client drawings.

Core Advantages
·Integrated Vertical Production: From raw forging and heat treatment to CNC turning and drilling, our entire process is managed in-house to ensure total quality control and full traceability.
·Global Certifications: ISO 9001 certified with PED (TÜV) and TS credentials, ensuring our products strictly adhere to the EU Pressure Equipment Directive.
·Massive Scale & Customization: We offer a production range from 1/2" to 60", with diameters up to 4 meters and component weights up to 10 tons. We support everything from rapid prototyping to mass production.
·Strict Quality Compliance: Our independent QA department ensures every flange meets ASTM/ASME, EN, and API standards, backed by comprehensive inspection reports.

Key Features
·Optimized Stress Distribution: The Type 11 neck design effectively mitigates stress concentration at the weld, maintaining seal integrity under fluctuating temperatures and high pressures.
·Precision Beveled Edges: Expertly machined bevels ensure full penetration during pipe welding, enhancing the overall structural strength of the pipeline.
·Superior Forged Integrity: Manufactured via forging (not plate cutting) to refine the internal grain structure, significantly increasing fatigue life and impact resistance.
·Versatile Facing Options: Available in Type A (Flat Face), Type B (Raised Face - B1/B2), or other configurations defined by EN1092-1 standards.

Applications
·Oil & Gas: High-pressure transport lines, wellhead equipment, and refinery facilities.
·Chemical Industry: High-temperature reactor interfaces handling corrosive media.
·Power Generation: Boiler feed systems and steam cycle piping in power plants.
·Shipbuilding: High-strength piping connections for demanding maritime environments.
·Heavy Machinery: Flange interfaces for pressure vessels, heat exchangers, and large-scale pumps.