you may apply the solution of Mr.augastin. But while placing insulating gasket ( which can be non asbestos ) between nut seating and flange, you need to remove the Nut, thus loosening the bolt itself. You can do this one by one . However if you choose to replace with bolt without any coat as suggested by me earlier , in sets of 4 at a time , it is a perfect one. See how much bolt area is there available as buffer. Also see the bolt spacing. If bolt area against the operating parameters is available you can go ahed with 4 bolts at a time so that while tightening a balanced load is applied.
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Tagore
On Mon, Aug 31, 2009 at 10:00 AM, prakash kamathuru <prakashkbp@gmail.com> wrote:
Dear Agustin,thanks a lot for your slon.do you have any procedure for this....Please send me the information.if u have...Your reply appreciated in advance..Regards,Prakash K B
On 8/31/09, AGUSTIN JIMENEZ <agumarca@yahoo.com> wrote:Too try use insulating gasket for bolts and nuts.excuse me if my english is not good.RegardsAgustin Jimenez
De: Nilesh Pathare <patharenil@gmail.com>
Para: materials-welding@googlegroups.com
Enviado: lunes, 31 de agosto, 2009 5:15:46
Asunto: [MW:3088] Re: Coating material for LTCS bolts on SS 304 flanges
You can go for FBE ( Fusion Bonded Epoxy) coating for those bolts.
FBE coating is a good option. But check other parameters and the fluid if its affect the FBE material.
Regards,
Nilesh Pathare.
On Fri, Aug 28, 2009 at 2:48 PM, 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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Best Regards,
Nilesh Pathare
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