A long weld neck flange LWN flange is a type of flange that has a long tapered neck that extends from the flange face to the pipe This longer neck provides more support to the pipe at the weld joint making it a more robust and reliable connection LWN flanges are typically used in highpressure and hightemperature applications such as in the oil and gas industry

Technical Specifications
Dimensions 12 to 24 in diameter
The neck length is typically 15 to 2 times the flange diameter
Materials Carbon Steel Stainless Steel or Alloy Steel
Pressure ratings 150 psi to 2500 psi
Temperature ratings 200F to 1000F
Types RFFFRTJ

LWN flanges are used in a variety of applications including
Oil and gas industry
Chemical industry
Power generation
Water treatment
HVAC

The benefits of using LWN flanges include
Increased strength and reliability
Longer service life
Wider range of applications
Easier to assemble and disassemble