Product Overview
A Flange is a standardized ring-shaped connector used to create strong, sealed, and detachable joints between pipes, valves, pumps, pressure vessels, and other industrial equipment. By bolting two matched flanges together with a gasket in between to achieve a seal, it is an indispensable core component in piping systems for conveying liquids, gases, and steam. It is widely used in industries such as petrochemical, power generation, shipbuilding, water supply, and HVAC.
Core Design & Mechanism
Its design is based on the engineering principles of standardization, pressure sealing, and mechanical strength:
Standardized Interface Design: Strictly adheres to international or industry standards (e.g., ANSI, DIN, JIS, GB), ensuring precise matching and interchangeability of flanges from different manufacturers in terms of nominal diameter, pressure rating, bolt hole circle, and facing type.
Sealing Structure: Its core function is reliable sealing. Under the bolt preload force, the sealing faces of the matched flanges (e.g., Raised Face RF, Flat Face FF, Ring Joint Face RJ) compress the intermediate elastic gasket (e.g., spiral wound, rubber), forming a uniform compressed seal to prevent media leakage.
High-Strength Structure: The flange body has sufficient thickness and reinforced design (e.g., neck transition) to withstand the internal pressure of the piping system, external loads, and the significant stresses generated by bolt tightening, ensuring the structural integrity of the joint.
Key Features & Benefits
Safe & Reliable Sealing: Provides a predictable and reliable sealing solution for the safe conveyance of high-pressure, high-temperature, toxic, or flammable media, serving as a critical safeguard for industrial safety.
Convenient Installation & Maintenance: The detachable design greatly facilitates sectional installation, equipment replacement, internal inspection, and cleaning of piping systems, significantly reducing operation and maintenance costs and downtime.
Excellent Universality & Interchangeability: Globally accepted standards ensure wide component availability, simplifying system design, procurement, and spare parts inventory management.
High Load-Bearing Capacity: Designed according to different pressure classes (e.g., PN10, PN16, Class 150, Class 300), it can adapt to various operating conditions from low-pressure water systems to high-pressure steam lines.
Wide Material Selection: Can be manufactured from Carbon Steel, Stainless Steel (304/316), Alloy Steel, Copper, or Plastics (PP/PVC) based on media characteristics and service environment, with corresponding anti-corrosion treatments (e.g., galvanizing, coating).
Technical Suitability
Suitable for end connections of steel pipes, fittings, valves, pumps, pressure vessels, compressors, etc.
The fundamental standard component for building complex industrial piping networks, enabling modular design and sectional pressure testing.
Selection must strictly match the system’s Nominal Diameter (DN), Pressure Rating (PN/Class), Facing Type, and media compatibility.
Conclusion
A Flange is far more than a simple connecting ring; it is the “joint” and “safety lock” of modern industrial piping systems. It perfectly integrates standardization, functionality, and engineering safety, providing a foundational yet crucial connecting guarantee for the stable operation of various process industries worldwide. For engineers, purchasers, and installers, the correct selection and installation of standard-compliant flanges is the fundamental prerequisite for ensuring the long-term, safe, and leak-free operation of the entire piping system.