A Long Weld Neck Flange (LWNF) is a specialized type of flange used to create a secure, high-strength connection between pipes and piping systems. The defining feature of a Long Weld Neck Flange is its extended neck, which is welded to the pipe, providing added strength and durability. This design ensures that the pipe can withstand high-pressure, high-temperature conditions without compromising integrity.

Long Weld Neck Flanges are particularly well-suited for critical applications where safety, reliability, and strength are paramount, such as in pressure vessels, boilers, and large-scale piping systems. The long neck is designed to provide a smooth transition between the flange and the pipe, minimizing turbulence and pressure drop within the system. They are widely used in industries where pipe integrity is crucial, including the oil and gas, chemical, and power generation industries.