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What are Flanges?
A pipe flange is a mechanical device used to connect pipes, valves, pumps, and other pieces of equipment to construct a pipeline system. Flanges are usually circular discs but can have many different shapes. Flanges are frequently welded or bolted onto pipe sections and used in conjunction with gaskets to maintain pressure. There are numerous varieties of flanges for a variety of applications. Metal or plastic flanges are available.
Flanges can be used to seal pipelines and provide structural support for the pipes to which they are bolted. These may be welded into a line, but they are more commonly run on to facilitate easy replacement if needed.
Types of Flanges
Slip On Flange
Slip on Flange Is primarily a ring fitted over the end of the pipe. The flange face extending sufficiently from the end of the pipe to apply a welded bead to the inner diameter. As the name implies, these flanges slip over a pipes. A slip-on flange is also known as a SO flange. It’s a type of flange that’s slightly larger than the pipe and slips over it, having an interior design. Slip-on flanges can have a raised or flat face. Slip-On Flanges are ideal for low-pressure applications. Slip on flanges are commonly used in fluid pipes.
Blind Flanges
Blind flanges are made without a bore and are used to cover the ends of pipes, valves, and pressure vessel openings. Blind flanges are the most stressed flange type in terms of internal pressure and bolt loading, especially at larger diameters. Despite this, the majority of these pressures are bending at the centre, and because there is no standardised inner diameter, these flanges are suited for higher pressure temperature systems. These flanges’ purpose is to restrict a section of pipe or a nozzle on a vessel that is not in use.
Weld Neck Flanges
Weld Neck Flange is also referred to as a tapered hub flange or a high-hub flange. A weld neck flange (WN flange) has a neck that can shift the pipe tension, lowering the pressure gathered at the flange’s bottom. It is suitable for pipelines that operate at high or low temperatures and can handle high pressure. Welding Neck Flanges are easily identified by their long tapered end that gradually penetrates through the wall thickness of a pipe or fitting. The long tapered hub provides significant shielding for use in a variety of high pressure, sub-zero, and/or high temperature applications. .
Socket Weld Flanges
Socket weld flanges are simply joined on the outside by a single fillet weld and are frequently not recommended for important services. These are primarily used for small-bore lines. Their static strength is the same as that of Slip On flanges, but their fatigue strength is 50% higher than that of double-welded Slip On flanges. To ensure adequate bore length, the thickness of the connected pipe should be defined for this type of flange.
Thornado offers a wide selection of flanges to suit different applications. We deliver Australia wide to meet the needs of trade, industrial and farm applications. Browse our product selection here on our website now. or navigate to our contact page if you have questions regarding flanges.