Different Types of flanges Manufactured
Slip On Flanges
Slip on Flange Is fundamentally a ring placed over the end of the pipe,
with a flange face extending from the end of the pipe by sufficient distance to
apply a welded bead to the inner diameter. As the name suggests these flanges
slip over a pipe & hence known as Slip On Flanges. A slip-on flange is also
known as SO flange. It’s a kind of flange that are slightly bigger than the
pipe & slides over the pipe, with internal design. Since the inner
dimension of the flange is slightly bigger than the external dimension of the
pipe, the top & bottom of the flange can be connected directly to equipment
or pipe by fillet welding the SO flange. It is used to insert the pipe into the
flange’s inner hole. Slip-on pipe flanges are used with a raised or flat face. Slip-On
Flanges are a suitable choice for low-pressure applications. Slip on flange is
excessively utilized in many fluid pipelines. Slip On Flanges Manufacturer in
India
Weld Neck Flange also known as a tapered hub flange or high-hub flange.
Weld neck flange (WN flange) has a neck that can move the pipe tension, thereby
reducing the pressure gathered in the bottom of the flange. It is compatible
with the pipelines which operate at high or low temperatures & withstand
high pressure. Welding Neck Flanges are effortlessly identifiable at the long
tapered end, which slowly passes through the wall thickness from a pipe or
fitting. The long tapered hub provides significant shielding for use in
multiple applications involving high pressure, sub-zero &/or high
temperatures. A weld neck flange comprises of a circular fitting with a
protruding edge around circumference. Weld Neck Flange has been used
successfully at pressures up to 5,000 psi. Weld Neck Flanges Manufacturer in
India
The Socket weld flanges are only connected on the outside by one fillet
weld, & are often not advised for critical services. These are mostly used
for the small-bore lines. Their static strength is equivalent to Slip On
flanges, but their fatigue strength is 50 percent higher than double-welded
Slip On flanges. For this type of flanges, the thickness of the connecting pipe
should be defined to ensure proper bore length. Before welding, a gap must be
formed in the socket weld flange between the flange or fit & the pipe. The
objective of a Socket Weld’s bottom clearance is generally to minimize the
residual pressure at the weld root that could occur during weld metal
solidification. The socket weld flange’s drawback is the right space, which
must be made. The crack between the pipe & the flange can cause corrosion
problems by corrosive products, & mostly in stainless steel pipe systems.
This flange is not allowed in some processes. Also for this flange, that
principle must always be welded first by a pipe & then simply by a fitting.
Socket Weld Flanges Manufacturer in
India
Spectacle Blinds are typically used for permanently splitting pipe
networks, or simply for connecting to each other. A Spectacle Blind is a steel
plate which has been cut into two discs of a certain thickness.
The two discs are connected to each other by a part of steel similar to
the piece of a pair of glasses on the nose. The name derives from the fact that
the assembly looks like eyeglasses or “spectacles.” One of the discs is a solid
plate, while the other is a ring who’s an inner diameter equivalent to that of
a flange. Spectacle Blinds are used in structures that need to be segregated
from other installations on a regular basis. The Spectacle Blind is usually
installed in the “open” position so that the flow through the pipe is feasible.
If the Spectacle Blind is rotated in the “close” position, the pipe is blanked
off & no flow is feasible. Blind Flanges Manufacturer in India
Lap joint flanges are used with stub ends when the pipe is made of
expensive material. For e.g., a carbon steel flange can be added to the
stainless steel pipe system because the flange will not come into contact with
the substance in the pipe. The stub ends will be butt-welded to the pipe &
the flanges will remain loose. The inner radius of these flanges is beveled
edge to clear the stub end radius. Lap joint flanges are almost similar to the
Slip On flange, except for the radius at the intersection of the flange face &
the bore to accommodate the flanged portion of the Stub End. Their ability to
hold pressure is little, if any, stronger than that of Slip On flanges, &
the fatigue life of the assembly is only one-tenth that of the Weld Neck
flanges. Lap joint flange is therefore used in low-pressure & non-critical
applications. Lap Joint Flanges Manufacturer in
India
Threaded flanges look nearly identical to Slip-On flanges but the key
difference is that the threaded flange has been bored out to match the inside
diameter of a particular pipe. Threaded flange is a type of flange that has
taper pipe threads in its bore conforming to ASME B1.20.1 & can be used in
piping systems where welding flange onto the pipe is not possible, such as
highly explosive areas where welding can develop potential risk. The threaded
flange is fixed onto a pipe that has additional threads to the taper pipe
Galvanized & cast-iron piping is commonly used with threaded flanges. In
very high pressure systems & for small diameters, threaded flanges can be
used & their main benefit is that they can be installed without welding. Threaded Flanges Manufacturer in
India
In high pressure & high (or fluctuating) temperature situations,
primarily in the oil & gas industry the long welded neck flanges (often
abbreviated to LWN) are used. The long neck guides the pipe into the flange
itself & offers reinforcement that is not possible with a standard welded
neck flange. This reinforcement is quite essential for the safety of
industrial, commercial & even residential high pressure systems. Unlike
many other types of flanges, Long Weld Necks have no schedule bores. Typically,
long welded neck flanges are made with square cuts to replace the pipe, &
not to be welded to the pipe. Long Weld Neck Flanges Manufacturer
in India
Orifice Flanges are used with orifice meters for the purpose of
measuring the flow rate of either liquids or gases in the respective pipeline.
Pairs of pressure “Tappings”, mostly on 2 sides, directly opposite each other,
are machined into the orifice flange. Orifice Flange Unions are designed
& manufactured to American Gas Association (AGA), ASME, & International
Society of Automation (ISA) recommendations. Orifice Flange are available in
wide array of the following types: Raised Face weld neck orifice flanges,
Raised Face slip-on orifice flange, Ring-Type joint weld neck orifice flanges,
Corner tap orifice flanges. Orifice Flanges Manufacturer in
India
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