Neck Flanges are a very common type of pipe flanges used in various
industrial applications. They have a long tapered hub and are often used
for high pressure applications.
- Stainless Steels
- Cast Iron
- Galvanized steel
- Carbon Steel
- PVC etc.
Types of facings in weld neck flanges:
Buying Tips When ordering a weld neck flange, it is very
important to specify the schedule of the pipe being used for. This
is because the inside diameter of the weld neck flange will match
the inside diameter of your pipe.
The three most common types of facings for weld neck flanges are:
- Raised face (most common)
- Ring type joint (RTJ)
- Flat face
How to measure weld neck flange?
- This is the most common type of high pressure pipe flange.
- They are distinguished from other types of pipe flanges by their
long tapered hub and gentle transition of thickness in the region of
the butt weld joining them to the pipe.
- The long tapered hub provides an important reinforcement of the
weld neck flange proper in terms of strength and resistance to
Take the measurements of the following:
Hub Diameter at Point of Weld
Weld Neck Bore
Length through Hub
OD of Raised Face
Diameter at Base of Hub
Uses of weld neck flanges:
- The weld neck flange is very resistant to dishing and has a very
sturdy connection because it has the pipe along with the tapered
- The flanges are ideal for extreme fluctuations of temperature.
- They are ideal in environments where there may be a lot of
bending and handling of the flanges.
- Preferred in an environment with extreme temperature conditions.
- This type of flange is preferred for every severe service
conditionresulting from high pressure or from sub-zero or
- They are used in situations where loading conditions are
substantially constant or fluctuate between wide limits.
- This is probably the best welding flange available because of its
high, heavy neck.
- Highly recommended wherever a sound welded joint connection is