RE: Threaded Connections for Instruments

From: <Ed>
Date: Fri Feb 01 2008 - 11:38:00 EST

Amjad,

I have read a lot of different responses to your inquiry.

I'll add one more based on my experience in the automotive industry.

In our piping specifications specially for stainless steel piping

we usually try to stay away from threaded connections to avoid possible leakages.

We usually use all welded connections (butt or socket), victaulic coupling, compression fittings, etc

for piping connections. Type of connections will depend upon system operating pressure.

But the reality of any piping systems is to provide instrumentations. Instruments most

commonly come with threaded connections (male / female) and in this case we are forced

to use threaded connections. Again to minimize possibility of leakage we have to use a higher

class fitting (say 3000 lbs ) even though we only have a 150 lb system .

This type of specification is very typical in the Automotive industry.

Hope this helps.

Ed

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From: PipingDesign@yahoogroups.com [mailto:PipingDesign@yahoogroups.com] On Behalf Of Syed Amjad Ahmed
Sent: Tuesday, January 29, 2008 9:52 AM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Threaded Connections for Instruments

Gentlemen
Lets say that,for a particular Pipe Spec,Threaded connection is not allowed. However, there is a clause saying that threaded connections can be used for "instruments", with higher class like CL 3000. How should we understand/interpret this? Could you please explain this in detail..

Thanks.
Amjad

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[Non-text portions of this message have been removed] Received on Fri Feb 01 11:38:00 2008