WELD NECK FLANGE
Structural Features:
A flange connected to the pipeline by “butt welding” at the neck, designed to withstand high pressure and high temperature conditions.
Features a prominent long neck
Flange faces available in RF / RTJ / FF types
Welding method: Butt weld
Forms an integral structure with the pipeline, offering excellent rigidity, high temperature and pressure resistance
High-quality welds required; non-destructive testing such as radiographic or ultrasonic inspection is often needed
Applications:Oil | Natural Gas | Chemical Industry | Power Generation
Marine | Nuclear Industry | Pipeline Systems | Equipment Interfaces
Common Size Standards: ASME B16.5 (2”–24”)
ASME B16.47 (Above 24”)
Pressure Ratings:
150#, 300#, 600# up to 2500#
Flange Face Types:
RF (Raised Face), RTJ (Ring-Type Joint), FF (Flat Face)
Materials:
Carbon Steel, Stainless Steel, Alloy Steel, Duplex Stainless Steel
Recommendation:
The harsher the service conditions, the more recommended the use of weld neck flanges.
Ideal for applications requiring high strength and leak-free connections.
