Standard Flanges
Explore nine standard flange types and their connection arrangements.
Weld Neck Flange
A tapered neck is butt-welded to the pipe, providing a gradual transition that helps transfer loads and reduce stress concentration…
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Threaded Flange
An internal thread connects the flange to a matching threaded pipe without a welded flange-to-pipe joint. Thread form, sealing method…
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Blind Flange
A solid flange closes the end of a piping system, valve opening or equipment nozzle. Its bolted connection allows access…
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Socket Weld Flange
The pipe seats inside a recessed socket and the connection is secured with a fillet weld. Assembly gap and welding…
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Slip-On Flange
The flange slips over the pipe and is attached by welding. Its bore is larger than the pipe outside diameter,…
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Lap Joint Flange
A backing flange works with a separate stub end. The loose flange can rotate for bolt-hole alignment while the stub…
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Long Weld Neck Flange
An extended neck provides a longer integral transition to an equipment or piping connection. Neck length, bore and connection geometry…
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Orifice Flange
An orifice flange arrangement supports a compatible orifice plate assembly for differential-pressure flow measurement. Pressure taps, plate dimensions and the…
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Spectacle Blind Flange
A spectacle blind combines a solid plate and an open ring linked together. Repositioning the assembly provides a visible means…
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