[MW:3130] Re: Coating material for LTCS bolts on SS 304 flanges

Fundamentally why this bolting is hot dip galvanized? By doing so, the bolt strength gets reduced and may not be suitable for service.

If it is not yet commissioned, just replace in sets of 4 bots at a time located diagonally opposite locations.

Tagore 

On Fri, Aug 28, 2009 at 6:48 AM, prakash kamathuru <prakashkbp@gmail.com> wrote:

Dear all,

 

Can any one help me to find the coating material for A320 Gr L7 bolts and A 194 Gr 2 nuts on SS 304 Flanges.As i checked the galvonic series Zn/mg not recomnded.Presently this heat exchnger flange which is already installed at site.Any Solution,so that without disturbing the joint we can coat some material at site for controlling galvonic corrosion.

 

Please keep in mind that it is STHE body flange.

 

Your feedbacks very helpful for me in taking decision and appriciated.

 

Regards,

 

Prakash

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