Flanges are used as support elements for structural stability and load bearing capacity.

Flange Types

          1.Welding Neck (WN) Flange: These flanges are attached to pipes using a circumferential butt weld. They have a tapered hub that enhances strength and rigidity. This makes them suitable for severe services with temperature extremes or high pressures. The bore of the flange should match the ID of the adjoining pipe to avoid turbulence or erosion.

Welding Neck Flange

          2.Slip-On (SO) Flanges: Slip-on flanges are rings placed over the pipe end and welded from both inside and outside. They are less expensive and easier to align than weld neck flanges but are not as strong. They are limited to be used to lower pressure classes and smaller sizes.

Slip on Flange

          3.Socket Weld (SW) Flanges: These have an internal shoulder to guide the depth for welding the pipe to the flange. The pipe is inserted until it bottoms out against the shoulder and then retracted slightly before welding. They are commonly used for reducing cracking in stainless steel super heaters.

Socket Weld Flange

          4.Lap Joint (LJ) or Van Stone Flanges: Used with a stub end welded to the pipe, these flanges allow easy alignment and disassembly. They are ideal for applications where regular maintenance is required.

Lap Joint Flange

          5.Threaded or Screwed Flanges: Suitable for low-pressure systems where welding is not preferable. The flange has a tapered internal thread for the pipe to screw into. They are sometimes back welded to prevent leaking.

Threaded Flange

          6.Blind Flanges: Used to cap off a pipeline. They are commonly installed at the ends of headers or in places where future connections are anticipated. 

Blind Flange

         7. Custom Flanges and fittings: Bespoke flanges based on the client requirements