[MW:0] RE: 6223] NACE recommendation on Bolts & Nuts Material

Hello VINEETH

If there is any Hydrogen generated near these bolts and nuts, there is
some danger of Hydrogen induced damage ( HIC- hydrogen Induced cracking)
and potential for possible other hydrogen related failures (HISC,SOHIC
etc) on these bolts and nuts.

Also in subsea application, if these bolts and nuts are installed under
the insulation, these bolts and nuts are considered exposed (by NACE) to
produced fluids and sea water. This is because if insulation cracks, it
can trap produced fluids and also sea water around these bolts and nuts.
This may cause bolt failure.

Hope this answers your question. If not, please let me know.

Is your application for sour service or sweet service? Please advise.

Thanks and Best Regards,

Ramesh Bapat

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Vineeth Thomas
Sent: Saturday, July 31, 2010 11:02 AM
To: Materials & Welding
Subject: [MW:6223] NACE recommendation on Bolts & Nuts Material

Dear All,

Can anybody tell me why NACE Recommends Low Hardness Materials ( ASTM
A193B7M and A194 2HM) for Bots and Nuts Since Bolts & Nuts are not at
all coming in contact with the Corrosive Fluid.

Thanks & Regards

Vineeth Thomas
Piping Engineer

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to
materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at
http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views
and meant for educational purposes only, Users must take their own
decisions w.r.t. applicable code/standard/contract documents.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.