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corrosion of carbon steel flange

corrosion of carbon steel flange

corrosion of carbon steel flange

(OP)
Due to an error in wall thickness calculations we have two pipelines connected together with a difference of 16mm. this crates an 8mm raised lip on one side.
The fluid is a warm  brine produced water highly corrosive fluid with a reasonable amount of dissolved iron, the system is designed to avoid ingrss of oxygen.

My question is: will this lip create turbulance and/or induce a bacterial growth area and hence become a corrosion mechanism.

RE: corrosion of carbon steel flange

It depends on flow conditions. What is the design process stream velocity thru this pipe?

RE: corrosion of carbon steel flange

It could become a site of enhanced corrosion (rather than a 'mechanism').  Can you not match bore a little bit to give a transition?

Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/

RE: corrosion of carbon steel flange

(OP)
The rating of the system is 1500 ILB

I may the contractor ask to chamfer the flanges to help the transition

RE: corrosion of carbon steel flange

I would expect some accelerated erroson/corrosion at the site.  Anything that will reduce the turbulance will help.

= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: corrosion of carbon steel flange

From a strength perspective, I doubt very much that the flange will be the weak link.  You can probably taper the edge of the one flange quite a bit, with the limiting factor being cost.

As others have stated - reducing turbulance will only help.

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