Coastal Flange | Precision Engineered Flanges

Weld Neck Pipe Flanges

Weld neck pipe flanges attach to the pipe by welding the pipe to the neck of the pipe flange.  The allows for the transfer of stress from the weld neck pipe flanges to the pipe itself.  This also reduces high stress concentration at the base of the hub of the weld neck pipe flanges.  Weld neck pipe flanges are often used for high pressure applications.  The inside diameter of a weld neck pipe flange is machined to match the inside diameter of the pipe.  Weld Neck Pipe flanges with a hub have published specifications that range from 1/2" thru 96".  Coastal Flange provides Weld Neck pipe flanges in all material grades, specifications and sizes.


Weld neck pipe flanges are typically provided with a raised face, flat face, or RTJ facing.  When a raised face is necessary for weld neck pipe flanges, the standard height is 1/16" for weld neck pipe flanges under 400#.  For weld neck pipe flanges of 400# and up, the standard weld neck pipe flange raised face height is 1/4". 


Coastal Flange manufactures weld neck pipe flanges in all steel material grades, including carbon weld neck pipe flanges, stainless steel weld neck pipe flanges and alloy weld neck pipe flanges.  Coastal Flange also has many different weld neck pipe flanges in stock and ready to ship.  Weld neck pipe flanges in stock include ANSI B16.5 weld neck pipe flanges, ASME B16.47 Series "A" weld neck pipe flanges, ASME B16.47 Series "B" weld neck pipe flanges, Pressure Vessel weld neck pipe flanges.  Coastal Flanges also manufactures custom weld neck pipe flanges per customer requirements.