Contact gasket surface of Flat Flange Slip On

• May 9, 2019

• #1

dinhhoan87

Mechanical

Dec 16, 2010

14

VN

Hi all,
Hope you have a good day.
I need your advice for this thread. I wonder that which face of a flat flange slip on will be the contact gasket surface? It seems that both sides of flat flange slip on are same.
Thanks for your help.

 

• May 9, 2019

• #2

racookpe1978

Nuclear

Feb 1, 2007

5,968

US

This is a photo of a specialized flat-face lap joint, not a conventional slip-on flange.
(Yes, it is NOT a typical slip-on joint, but it will serve to illustrate the flat face gasket sealing surface.)

Now, please explain your question, what surface - other that the blue-sprayed surface which touches the gasket - could see system fluid pressure?

 

• May 9, 2019

• #3

LittleInch

Petroleum

Mar 27, 2013

21,210

GB

In theory it's the entire face of the flange.

But your post doesn't make sense. Sketch or drawing required.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

• May 9, 2019

• Thread starter
• #4

dinhhoan87

Mechanical

Dec 16, 2010

14

VN

Thanks racookpe1978 and LittleInch. My question is simple as below photo:

Face 2 is the surface that touchs to gasket.
So when fitting-up at shop how can I know which surface of flange will touch to gasket ?

Thanks for your advice.

 

• May 10, 2019

• #5

KevinNZ

Mechanical

Jun 12, 2003

828

NZ

The sealing face will be the one with the spiral ridges required to grip the gasket

 

• May 10, 2019

• Thread starter
• #6

dinhhoan87

Mechanical

Dec 16, 2010

14

VN

Thanks . I see that it is same on both faces visually so that's why I post this thread. And I think that both faces are the same.

 

• May 10, 2019

• #7

LittleInch

Petroleum

Mar 27, 2013

21,210

GB

Then it doesn't matter. Probably they made both sides the same to help people who putt on flanges the wrong way around....

BTW that's a pretty small fillet weld on the outside of the pipe. That won't take a lot of pressure.

See how much better your post was when you added a drawing and a photo?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

• May 10, 2019

• Thread starter
• #8

dinhhoan87

Mechanical

Dec 16, 2010

14

VN

@LittleInch you're right. I will remember your signature.
"Remember - More details = better answers
Also: If you get a response it's polite to respond to it[highlight #3465A4][/highlight]."