Mumbai, Maharashtra, India
Our Products
Uses of pipe flanges:
Designs of flanges:Butt weld, Socket weld, Captive, Split, Square, Round, Rectangle etc.
Material grades:
Features of blind flanges:
Some important features of blind flanges are as follows:
Weld Neck Flanges are fittings used in place of welded flanges where rotating back up flanges are desired. They are also called lap joints and vanstone flared laps. A rotating back up flange seats itself against the back surface of the stub end. When bolts are added, the clamping action of the bolts presses the rotating back up flange against the back of the stub end. The gasket surface of the stub end then presses against a gasket and another gasket surface providing joints like standard flange joints. The seal is made by the gasket surface of the stub end alone, the flange only provides the clamping pressure on the joint. Our high quality Weld Neck Flanges (butt weld fittings) are tested and verified for durability, accuracy and precision. The Weld Neck Flanges are manufactured in all standard dimensions. The Weld Neck Flanges are provided with a standard weld bevel and can be available in squared, flanged, Victaulic and threaded ends. We offer Weld Neck Flanges at highly competitive prices.
Specifications
A Slip-On Flange is bored sightly larger than the outer Diameter of the matching pipe. The pipe slip into the flange prior to welding both inside and outside to prevent leaks.The British standard flanges manufactured by us pertain to all standards like BS10 1962 Table D, E, F, H IS 6392 Table 5, 17, 26 IS 1538 in slip. These are manufactured using mild steel both in slip-on and blind type. Our quality slip on flanges are ideal for lower pressure applications. Their ease of fitting and welding reduces fabrication costs. Our professional engineering team is involved in innovating durable and high-quality products to cater to our clients' needs.
Raised face, ring - type, flat face, male - female, tongue - groove.welded both inside and out to provide sufficient strength and prevent leakage.They are ideal for low pressure applications.
Socket welding flange, a popular type of pipe flange, was initially developed for use on small-sized high- pressure piping. The fabrication of this type of flange is similar to that of aslip-on flange. However, the internal pocket of a socket weld flange allows for a smooth bore and better fluid flow. When provided with an internal weld, the static strength of this flange is equal to slip-on flange, but the fatigue strength is 50% greater than double welding slip-on flanges. Smooth bore conditions in such a flange can easily be attained without having to bevel the flange face and, after welding, to re-face the socket weld flange as would be required with slip-on flanges. For this reason, the internally welded flange is popular in chemical process piping. The counter bore is sightly larger than the Outer Diameter of the matching pipe, allowing the pipe to be inserted. A restriction is built into the bottom of the bore, which acts as a shoulder for the pipe to rest on, and has the same I.D. of matching pipe. The flow is not restricted in any direction.
Key Features:
The recess on the inside diameter of the socket weld flange allows for a good fit of the pipe allowing for a smooth flow of liquid. Socket welding flanges work well for smaller sizes and higher pressure temperature conditions. They are similar to slip-on flanges, but must specify the schedule of the pipe where they will be used for with socket welds.
Standard facing:
Raised face, ring - type, flat face, male - female, tongue - groove.welded both inside and out to provide sufficient strength and prevent leakage.They are ideal for low pressure applications.
Uses of socket weld flanges:
Separating one part of a line from another requires a spectacle blind, able to switch from closed to open and back again. Bleed rings provide a means to release pressure from the pipe through a controlled opening.
Materials used:
Stainless Steel:
ASTM A182 F304/304L, F316/316L, F316H, F316Ti, F321, F44(UNS S31254)
Key Features:
Can be attached to the pipe without welding (sometimes an additional seal weld is used as well) Ideal for higher pressure and temperature applications for small pipe sizes
Not recommended for larger loads, especially when subjected to higher torque
The first and most widely used type are spec blinds short for spectacle: these are flanges with two equal outside diameter (OD) parts welded together by way of a bridge. One of the parts also contains an inside diameter (ID), while the other is a blank, or blind. A whole is put at the halfway mark of the bridge. These are also called spectacles, figure 8s, and figure 8 blanks, because of their resemblance to reading glasses (spectacles) and figure 8s. These are referred to as Line Blanks in the ASME/ANSI standards.
The second and third types are quite similar: both have longer bridges, referred to as paddles, which resemble longer handles. One type has only an OD, and so is a blind plate similar in appearance to a large pizza oven peel. These are referred to as paddle blinds. The other type is exactly the same but comes with an ID as well, enabling flow-through when installed in a piping system. These pieces have holes in the paddle which enables field personnel to determine by sight which piece is installed in a system. These are referred to as paddle spacers, and are often supplied in sets together with the paddle blinds.
All 3 types of these flanges are used in piping systems or pressure vessels where the flow needs to be interrupted from time to time. They are installed between two pipe flanges (as specified above), and by way of a screw inserted into the hole in the bridge or paddle, they are able to rotate or swing into and out of position to interrupt or allow the flow, as the user sees fit.
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Weld Neck Flanges are drilled(machined) with the wall thickness of the flange having the same dimensions of the matching pipe, the lighter the pipe is, the larger the bore, conversely, the heavier the pipe, the small the bore, they are normally used for highpressure, cold or hot temperature
Notes :
Flange dimensions to ANSI B16.5.
Dimensions "B" & "D" includes raised face thickness.
Bore (SCH) "C" purchasess to Specity.
Larger outlet sizes are avilable on applications.
ANSI 150# / 300# 2mm Raised Face.
ANSI 600# / 2500# 7mm Raised Face.
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 dishing.
