Weld Neck Flange Datasheets

Types of Weld Neck flanges

The weld neck flange (WNF) is a flange type that is usually used with pipes, as opposed to pressure vessels. The design of the flange allows for a full penetration weld at its base where it connects to the pipe.  This weld can be X-ray inspected for quality control. Click here to learn more about weld neck flanges.

Weld Neck Flange Sizes - 1/2" through 24"

data wnf b16.5 data wnf rjf b16.5

Weld Neck Flange Sizes 26" through 60"

data wnf b16.47    

Weld Neck Flange - Industry Standard

data wnf b16.47    

Standards

ASME Standards

  • ASME B16.5 - Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • ASME B16.36 - Orifice Flanges
  • ASME B16.47 - Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard
    • Series A / MSS SP-44
      • For general use
      • Bolt circle diameter is larger than Series B
      • NOT interchangeable
    • Series B / API Std 605 (cancelled)
      • For compact use
      • Bolt circle diameter is smaller than Series A
      • NOT interchangeable
Display #
Title
Flange - Weld Neck, ANSI Class 150, B16.47 Series A (in)
Flange - Weld Neck, ANSI Class 150, B16.5 (in)
Flange - Weld Neck, ANSI Class 150, B16.5 RTJ (in)
Flange - Weld Neck, ANSI Class 1500, B16.5 (in)
Flange - Weld Neck, ANSI Class 1500, B16.5 RTJ (in)
Flange - Weld Neck, ANSI Class 2500, B16.5 (in)
Flange - Weld Neck, ANSI Class 2500, B16.5 RTJ (in)
Flange - Weld Neck, ANSI Class 300, B16.47 Series A (in)
Flange - Weld Neck, ANSI Class 300, B16.5 (in)
Flange - Weld Neck, ANSI Class 300, B16.5 RTJ (in)
Flange - Weld Neck, ANSI Class 400, B16.47 Series A (in)
Flange - Weld Neck, ANSI Class 400, B16.5 (in)
Flange - Weld Neck, ANSI Class 400, B16.5 RTJ (in)
Flange - Weld Neck, ANSI Class 600, B16.47 Series A (in)
Flange - Weld Neck, ANSI Class 600, B16.5 (in)
Flange - Weld Neck, ANSI Class 600, B16.5 RTJ (in)
Flange - Weld Neck, ANSI Class 75, Industry Standard (in)
Flange - Weld Neck, ANSI Class 900, B16.5 (in)
Flange - Weld Neck, ANSI Class 900, B16.5 RTJ (in)