Serrated vs non serrated flange face finish
Serrated vs non serrated flange face finish
(OP)
Dear all,
What is the difference between serrated and non-serrated flange face finish ?
How to decide when to go for serrated and non-serrated flange face finish ?
As per MSS-SP-6 Table 1,
For ductile iron flanges Flat face, roughness is serrated 6.3 micro meter
or
Serrated : spiral or concentric, 11 to 50 per in. What does this indicate?
Regards
What is the difference between serrated and non-serrated flange face finish ?
How to decide when to go for serrated and non-serrated flange face finish ?
As per MSS-SP-6 Table 1,
For ductile iron flanges Flat face, roughness is serrated 6.3 micro meter
or
Serrated : spiral or concentric, 11 to 50 per in. What does this indicate?
Regards





RE: Serrated vs non serrated flange face finish
Ductile Iron means the surface is "rough", but not machined.
Spiral and x per inch is a machined finish to create a roughened surface to "grip" the gasket and in theory provide more obstructions to gas or liquid flow.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Serrated vs non serrated flange face finish
Thanks
Dean
RE: Serrated vs non serrated flange face finish
On deciding flange-type:
Flange (and other specifications) are often given by end-user either as written norm/specifications or 'normal practise'. Check!
If you are free to decide, the best bet would be to check the normal, or a good and reliable gasket supplier for gasket types and prices, and pro/cons for your particular case. All pressure, fluids and mechanical and process data would be necessary.