Piping Flange Types, Faces, and Surfaces - Explained!

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Learn about pipe flanges! This video teaches you about Flange Types, Faces, Surfaces, and how flanges work. We also take a look at flange gaskets and their usage within piping systems.

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▶️Piping flanges are essential components within all piping systems. A flange is a type of mechanical joint and is the second most common type of joint after a welded joint. Unlike welded joints, a flange can be quickly and easily assembled and disassembled.

Flange Types
The most common flange types are the:
- Blind Flange
- Slip-on Flange
- Socket Weld Flange
- Welding Neck Flange (also known as a ‘weld neck flange’)
- Lap Joint Flange (LJF)
- Threaded Flange (also known as a ‘screwed flange’)

Blind flanges are used for a wide range of pressure classes and may have all types of flange face.

Slip-on flanges are used for medium to low pressure classes and use flat or raised faces.

Welding neck flanges are suitable for a wide range of pressures, temperatures and NPS sizes; they are the most common type of flange within the oil and gas industry.

Socket weld flanges are used for smaller nominal pipe sizes, and low to medium pressures.

Lap joint ring flanges do not come into contact with the process medium. A stub end is inserted through the LJF and welded to the associated pipe; it is the stub end that comes into contact with the process fluid. Stub ends can be used for a wide variety of pressure classes and temperatures.

Threaded flanges are used for lower pressure and temperature applications. Typically, the NPS of a threaded flange is small (less than 4”).

The most common flange faces are the:
- Flat Face (FF)
- Raised Face (RF)
- Ring Type Joint (RTJ)

Flat face flanges have a large sealing area and are used for low pressure and low temperature system. Raised face flanges have a much smaller sealing area and are often serrated; this type of flange is used for medium pressure systems and higher. RTJ flanges have a small sealing area and use metal gaskets (hard gaskets); RTJ flanges are used for medium pressure systems and higher.

The most common flange surfaces are the:
- Smooth
- Serrated (which can be concentric or spiral [phonographic])
- Stock Finish

Stock finish surfaces are the most common flange finishing surface. Raised face flanges usually have a serrated surface. Flat face flanges have a smooth surface finish and are used for lower pressure applications.

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[savree-d]

Want to continue learning about engineering with videos like this one? Then visit:

Want to teach/instruct with the 3D models shown in this video? Then visit:

[jacopodigiacomantonio]

working in the Oil&Gas industry since 6months and finally i understood why flanges are not just 2 slab of metals to connects pipes and valves together. Really appreciated the “make it simple” touch of the presentation while explaining everything completely.

[bdot]

It's not all that often that the algorithm actually recommends a video I might actually enjoy like this...

[nikstvs]

Been getting ready to the job interview while watching your videos, and now still watching after i got the job offer😊

[chprocesser]

😄5:43 could not stop grinning at the comparison here, these are moments that make my work place entertaining. Thanks for adding some glitter to this tutorial

[ikramkhan]

I was too much confused from 2 years but now i understand the whole phenomena very well.its a great vedio and i think many people like me will now understand flanges

[jocelynxiang]

Great courses, really enjoyed! Much appreciated!

[RaviMallappa]

Very well explained. I'll never have to worry about remembering the flange faces again.

[gianmg_]

Oh man, your work is truly awesome! Thank you so much for sharing this content.

[paulnaveen]

So much information demonstrated in a beautiful manner

[hasnainsherwani]

What a great explanatory video on flanges and types 👌 Thanks for producing such an amazing and engaging content on engineering.

[johnivanvillanueva]

Thank you so much all your videos are really helpful.hope you will upload a video of how the compressor works.

[gouravpandit]

Best video on flanges 👌👍 your way of thinking and teaching is superb, thanks a million.

[StrangeCloudSs]

amazing, I found this chanel yesterday and I have been watching some videos and everyone of them are amazing for learnig new stuff and refreshing some concepts even.

[gorillahumpr]

I've enjoyed all of your videos thus far. Personally I would have saved the seal joke and inserted a picture of myself when you said Stud. But who am I? You rock🤘

[marcopeiser]

I love how you explained that you must understand the concecpt. 🙂 i'm rookie, have no papers, but so passionate about engineering.

[Piecer]

Thank you, this is one of the best basics in Mech field. Much appreciated.

[aravinthraj]

Beautiful explanation and presentation as always 👏👏

[neilpainter]

Fantastic video, thanks for creating!

[scarseven]

that was a perfect explanation, thank you ^^