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MANUFACTURE TO ANY SPECIFICATION:

• SANS (SABS) 1123,
   BS4504 &BS10

• ISO

• AWWA

• DIN SPEC

• ANSI B16.5  

or to your specification


AVAILABLE IN:

WELDNECK, SLIP-ON, SCREWED AND BLANK


SIZE OF MANUFACTURE:

From 10NB up to 2500NB

Split Flanges


FLANGES MANUFACTURED TO:

• 300WA

• BS1501 - 151 - 430A

• Backing Ring Flanges
   (Galvanized for HDPE
   Piping)

• Electro Plated Flanges
   Commercial Mild Steel

• Stainless Steel 304 / 316 /
   3CR12

• Commercial Mild Steel

• Weld Neck Flange with
   pressure rating &
   Certification

• Hydrant Flanges, Puddle
   Flanges

• ASTM Forging


ALL GRADES OF MATERIAL:

• 300WA

• S355JR      

• BS1501 -151 -430A    

• Commercial Mild Steel    

• ASTM A105 Forged Flanges

• 304 L Stainless Steel

• 316 L Stainless Steel

• 3CR12 Stainless Steel

All other Flange Material

Flanges : Locally Manufactured and Imports


FLANGES MANUFACTURED AS FOLLOWS:


MANUFACTURE TO ANY SPECIFICATION:

• SANS (SABS) 1123, BS4504 &BS10

• ISO

• AWWA

• DIN SPEC

• ANSI B16.5  

• OR TO YOUR SPECIFICATION


AVAILABLE IN:

• WELDNECK, SLIP-ON, SCREWED AND BLANK


SIZE OF MANUFACTURE:

• From 10NB up to 2500NB

• Split Flanges


FLANGES MANUFACTURED TO:

• 300WA

• BS1501 - 151 - 430A

• Backing Ring Flanges (Galvanized for HDPE Piping)

• Electro Plated Flanges Commercial Mild Steel

• Stainless Steel 304 / 316 / 3CR12

• Commercial Mild Steel

• Weld Neck Flange with pressure rating & Certification

• Hydrant Flanges, Puddle Flanges

• ASTM Forging


ALL MATERIAL GRADES:

• 300WA

• S355JR      

• BS1501 -151 -430A    

• Commercial Mild Steel    

• ASTM A105 Forged Flanges

• 304 L Stainless Steel

• 316 L Stainless Steel

• 3CR12 Stainless Steel

• All other Flange Material


PIPE FLANGE INFORMATION

Flanges are relatively simple mechanical connectors that have been used successfully for high-pressure piping applications. They are well understood, reliable, cost-effective, and readily available from a wide range of suppliers. Pipe flanges are protruding rims, edges, ribs, or collars used to make a connection between two pipes or between a pipe and any type of fitting or equipment component. Pipe flanges are used for dismantling piping systems, temporary or mobile installations, transitions between dissimilar materials, and connections in environments not conducive to solvent cementing

In addition, the moment-carrying capacity of flanges is significant compared to other mechanical connectors. This is an important feature for systems that experience pipe-walking or lateral buckling from temperature and pressure variations (e.g. deep water lines). Flanges can be designed to meet a wide range of application requirements such as high-temperature and corrosion resistance.

Operation

Pipe flanges have flush or flat surfaces that are perpendicular to the pipe to which they attach. Two of these surfaces are mechanically joined via bolts, collars, adhesives or welds.






Types of Flanges

Pipe flanges can be divided into eight types based on design. These types are blind, lap joint, orifice, reducing, slip-on, socket-weld, threaded, and weld neck.

Blind flanges are round plates with no centre hold used to close the ends of pipes, valves, or equipment.

Lap joint flanges are used on piping fitted with lapped pipe or with lap joint stub ends. They can rotate around the pipe to allow for an easy alignment and assembly of bolt holes even after the welds have been completed.

Slip-on flanges are designed to slide over the end of piping and then be welded in place. They provide easy and low-cost installation and are ideal for lower pressure applications.

Socket weld flanges are ideal for small-sized, high-pressure piping. Their fabrication is similar to that of slip-on flanges, but the internal pocket design allows for a smooth bore and better fluid flow.

Threaded flanges are special types of pipe flange that can be attached to the pipe without welding. They are threaded in the bore to match external threading on a pipe and are tapered to create a seal between the flange and the pipe.

Welding neck flanges have a long tapered hub and are used for high pressure applications. The tapered hub transfers stress from the flange to the pipe itself and provides strength reinforcement that counteracts dishing.

Typically, flanges are attached to pipes via welding, brazing, or threading.

Welding joins materials by melting the workpieces and adding a filler material. For strong, high pressure connections of similar materials, welding tends to be the most effective method of flange connection. Most pipe flanges are designed to be welded to pipes.

Brazing is used to join materials by melting a filler metal which solidifies to act as the connector. This method does not melt the workpieces or induce thermal distortion, allowing for tighter tolerances and clean joints. It also can be used to connect very dissimilar materials such as metals and metalized ceramics.

Threading is applied to flanges and pipes to allow the connections to be screwed together in a manner similar to nuts or bolts.

While the method of attachment can be a distinguishing feature, there are other considerations more important to pipe flange selection. Factors an industrial buyer should consider first are the flange's physical specifications, type, material, and performance features most suitable for the application.

Physical Specifications

First and foremost, a flange must fit the pipe or equipment for which it is designed. Physical specifications for pipe flanges include dimensions and design shapes.

Flange Dimensions

Physical dimensions should be specified in order to size flanges correctly.

Outside diameter (OD) is the distance between two opposing edges of a flange's face.

Thickness refers to the thickness of the attaching outer rim, and does not include the part of the flange that holds the pipe.

Bolt circle diameter is the length from the centre of a bolt hole to the centre of the opposing hole.

Pipe size is a pipe flange's corresponding pipe size, generally made according to accepted standards. It is usually specified by two non-dimensional numbers, nominal pipe size (NPS) and schedule (SCH).

Nominal bore size is the inner diameter of the flange connector. When manufacturing and ordering any type of pipe connector, it is important to match the bore size of the piece with the bore size of the mating pipe.

Flange Faces

Flange faces can be manufactured to a large number of custom shapes based design requirements. Some examples include:

• Flat

• Raised face (RF)

• Ring type joint (RTJ)

• O-ring groove


Types of Flanges

Pipe flanges can be divided into eight types based on design. These types are blind, lap joint, orifice, reducing, slip-on, socket-weld, threaded, and weld neck.

Blind flanges are round plates with no centre hold used to close the ends of pipes, valves, or equipment.

Welding neck flanges have a long tapered hub and are used for high pressure applications. The tapered hub transfers stress from the flange to the pipe itself and provides strength reinforcement that counteracts dishing.

Lap joint flanges are used on piping fitted with lapped pipe or with lap joint stub ends. They can rotate around the pipe to allow for an easy alignment and assembly of bolt holes even after the welds have been completed.                                                                                                                              
Slip-on flanges are designed to slide over the end of piping and then be welded in place. They provide easy and low-cost installation and are ideal for lower pressure applications.

Socket weld flanges are ideal for small-sized, high-pressure piping. Their fabrication is similar to that of slip-on flanges, but the internal pocket design allows for a smooth bore and better fluid flow.

Threaded flanges are special types of pipe flange that can be attached to the pipe without welding. They are threaded in the bore to match external threading on a pipe and are tapered to create a seal between the flange and the pipe.

View our work done Pipe Flanges Pipe Flanges Operation Types of Flanges