Welding Neck Flange

Welding Neck Flange
Description
Welding Neck Flanges are easy to recognize at the long tapered hub, that goes gradually over to the wall thickness from a pipe or fitting.
The long tapered hub provides an important reinforcement for use in several applications involving high pressure, sub-zero and / or elevated temperatures. The smooth transition from flange thickness to pipe or fitting wall thickness affected by the taper is extremely beneficial, under conditions of repeated bending, caused by line expansion or other variable forces.
These flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction of product flow. This prevents turbulence at the joint and reduces erosion. They also provide excellent stress distribution through the tapered hub and are easily radio graphed for flaw detection.
This flange type will be welded to a pipe or fitting with a single full penetration, V weld (Buttweld).
Specification
1   Welding Neck Flange
2.  Material: carbon steel, stainless steel, alloy steel
3.  Size:  1/2"~60"
4.  Type of flange face: Flat Face (FF), Raised Face (R.F), (MFM)
5.  Pressure: 150 Lbs to 2500 Lbs
6.  Standard: ANSI,JB,DIN
Application:
Welding neck flange also called long neck flanges, mostly used in piping systems which are high temperature and pressure, connecting large size of pipes.