Tapping of Stainless Steel Injection line in Carbon Steel Blind Flange 1

[Shahbaz_ME]

Hi Folks !
I am working on a project and a little bit confused about galvanizing coupling. I have to tap a stainless steel chemical injection line in Carbon Steel Blind Flange. Question is do i have to isolate CS from SS with some means. Any governing ASME Code or standard for reference will be highly appreciated.

 

[Dhurjati Sen]

Dear Shahbaz_ME,

Galvanic corrosion would occur. But due to area effect it would be negligible. No need to isolate SS from CS. SS small bore with CS is usually done to prevent other forms of corrosion that would have taken place in the small bore piping, had it been CS.

Regards.

DHURJATI SEN
Kolkata, India