Stainless steel flanges with carbon based bolts
Stainless steel flanges with carbon based bolts
(OP)
I have a doubt, can it be used stainless steel flange, with carbon bolts?
On the plant that I'm currently working, WNRF flanges A/SA 182 are connected with B7 bolts. Is it allowed by ASME connections of different types of materials? Will it increase corrotion rate?
On the plant that I'm currently working, WNRF flanges A/SA 182 are connected with B7 bolts. Is it allowed by ASME connections of different types of materials? Will it increase corrotion rate?





RE: Stainless steel flanges with carbon based bolts
Second, clamping load for this joint design must be carefully evaluated based on service temperature.
Material choices for bolting is up to the design engineer because this is a process detail, and is not covered by Codes and Standards. Codes and Standards do provide necessary information for allowable stress values and some basic exemptions for use.
RE: Stainless steel flanges with carbon based bolts
RE: Stainless steel flanges with carbon based bolts
RE: Stainless steel flanges with carbon based bolts
RE: Stainless steel flanges with carbon based bolts
rmw
RE: Stainless steel flanges with carbon based bolts
Steve Jones
Materials & Corrosion Engineer
http://www.oilandgaspeople.com/cv/11499664
http://www.linkedin.com/pub/8/83b/b04
RE: Stainless steel flanges with carbon based bolts
RE: Stainless steel flanges with carbon based bolts
RE: Stainless steel flanges with carbon based bolts
RE: Stainless steel flanges with carbon based bolts
Oddly enough, we started out with B8 bolting and switched to B7.
Thanks for all that contributed.
rmw
RE: Stainless steel flanges with carbon based bolts
With Class 1 you need to consider whether the bolting has sufficient strength for your bolted connection (and there are limitations in ASME B16.5 around where low strength bolting is permitted).
With Class 2 you may need to consider the service environment and whether a strain hardened bolt is acceptable (e.g., may be more susceptible to some failure modes).
RE: Stainless steel flanges with carbon based bolts
h
S
Corrosion & Rust Prevention Control
RE: Stainless steel flanges with carbon based bolts
Regards,
Mike
RE: Stainless steel flanges with carbon based bolts
All our outside SS Flanges we use B8 or B8 Class 2. We are situated on a salt water bay. We use C5A or FelPro Cu based thread lubricant on all fasteners. On any flanges above 650°F we use a BN lubricant with any fastener material.