Direct contact between SS and CS material
Direct contact between SS and CS material
(OP)
What is a good engineering practice to avoid direct contact between a stainless steel pipe with stub end connection and carbon steel lap joint flange ? Will painting the lap joint flange suffice?
My second question :To bolt up two stainless steel flanges with CS stud bolts and nuts ,what is the good practice to avoid the direct contact between the nuts and flange back side.
Regards
RezaMani
My second question :To bolt up two stainless steel flanges with CS stud bolts and nuts ,what is the good practice to avoid the direct contact between the nuts and flange back side.
Regards
RezaMani





RE: Direct contact between SS and CS material
Is there a real need to isolate the flanges as isolation of flanges adds to maintenance problems.
RE: Direct contact between SS and CS material
Had similar problem.
Please try and obtain NACE RP 289 on isolation joints.
Any proposed bolting should be isolated. Resistivity measurements will verify if you have successful isolatiion.
RE: Direct contact between SS and CS material
We r not going to isolate two mating flanges but to isolate the ss stub-end piece from the cs lap joint type flange.Gaskets are generally used for isolation of two mating flanges and actually we have the gaskets in between the two stub ends.
I hope that I could understand your point and explain mines clearly.
Cheers
RE: Direct contact between SS and CS material
Summary can be found from following link
http://www.nace.org/nacestore/assets/freestandardsrepor...
RE: Direct contact between SS and CS material
RE: Direct contact between SS and CS material
RE: Direct contact between SS and CS material