AN Tube Flares
10-17-2007, 01:26 AM
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AN Tube Flares I am flaring some tubing for AN fittings using standard non stainless, steel tubing. My question is are AN tube flares typically a single flare or a double flare. I am aware of the angle the flare must be.
10-17-2007, 03:49 AM
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Depending on the type of tubing and material your using:
TYPE
Seamless (MEETS ASTM A213 & A269) could probably get away with single flare - but I personally would still go with double.
Seamed - would definitely only go with double flare as the tubing will tend to split at the seam at flare area. (as an example: most of the tubing you buy in auto parts store for brake lines is seamed and requires double flare)
MATERIAL
If the tubing will show I would go with 316 stainless tubing (can buy from McMaster Carr or Swagelok) then you can also polish it for the 'bling' factor.
Aluminum or copper tubing - go with double flare regardless of tubing wall thickness.
Stainless or plain steel tubing - as stated before, if wall thickness is .035, .049, or .065" you could possibly get away with single flare - but I would still use double.
When choosing whether to single or double flare - the type of tubing (seamless/seamed) takes precedence over material used (i.e. if you have a SS tube with heavy wall thickness, but it is of seamed construction, go with double)
-Jay-
TYPE
Seamless (MEETS ASTM A213 & A269) could probably get away with single flare - but I personally would still go with double.
Seamed - would definitely only go with double flare as the tubing will tend to split at the seam at flare area. (as an example: most of the tubing you buy in auto parts store for brake lines is seamed and requires double flare)
MATERIAL
If the tubing will show I would go with 316 stainless tubing (can buy from McMaster Carr or Swagelok) then you can also polish it for the 'bling' factor.
Aluminum or copper tubing - go with double flare regardless of tubing wall thickness.
Stainless or plain steel tubing - as stated before, if wall thickness is .035, .049, or .065" you could possibly get away with single flare - but I would still use double.
When choosing whether to single or double flare - the type of tubing (seamless/seamed) takes precedence over material used (i.e. if you have a SS tube with heavy wall thickness, but it is of seamed construction, go with double)
-Jay-
