Heat exchanger design for 500 degC - fittings
Heat exchanger design for 500 degC - fittings
(OP)
Hi,
Got an application that currently uses ASTM A403 WP304L fittings and I'm looking at using WP316L. The fittings are part of a heat exchanger and will be exposed to temperatures approx. 500 degC. Are there any concerns regarding the change in material, such as hardness and longevity?
Cheers
Digs
Got an application that currently uses ASTM A403 WP304L fittings and I'm looking at using WP316L. The fittings are part of a heat exchanger and will be exposed to temperatures approx. 500 degC. Are there any concerns regarding the change in material, such as hardness and longevity?
Cheers
Digs





RE: Heat exchanger design for 500 degC - fittings
RE: Heat exchanger design for 500 degC - fittings
RE: Heat exchanger design for 500 degC - fittings
RE: Heat exchanger design for 500 degC - fittings
Hello metengr - I am a little surprised with your statement
[quote metengr][ The reason I ask is that the A 403 material is not used for ASME pressure fittings./quote]
SA 403 fittings are very common to be used in ASME Vessels and Heat exchanges.
Why would say that they are not allowed?
Kindly clarify your position.
Thanks,
D2HANDLE
RE: Heat exchanger design for 500 degC - fittings
RE: Heat exchanger design for 500 degC - fittings
I was talking about the wrought butt welded fittings such as Elbows, tees, Reducers etc. in accordance with ASME B16.9.
D2HANDLE
RE: Heat exchanger design for 500 degC - fittings
RE: Heat exchanger design for 500 degC - fittings
B16.34 is the standard for Valves — Flanged, Threaded, and Welding End.
Are you sure you are referrring to this B 16.34?
Also, the materials allowed for wrought fittings are all mentioned in Par. 5 of the standard, and I cannot find any reference to B 16.34 for the material grouping.
RE: Heat exchanger design for 500 degC - fittings
I was able to retrieve my copy of ASME B16.9, and A 403 is indeed listed. My apologies. I was thinking of B16.5.
RE: Heat exchanger design for 500 degC - fittings
ASME II-D, although probably not applicable to your situation, lists L-grade up to a max of 454°C. Same counts for B16.5 (but then for 304L forgings).
It's in there for a reason, even if youre not working to any ASME standard, consider those reasons.
RE: Heat exchanger design for 500 degC - fittings