[labnetwork] Bending coaxial

[Simon Doe]

Hi all
First time posting but been doing lots of reading. It’s a good forum.

For once I can add a comment. I’m a qualified welding engineer and I always start with a statement that if you can avoid welding something then do so.
Its as stated before, whilst welding is almost always 100% suitable – and all the welds should be inspected according to the fabrication standard requirements – they do add the potential for contamination, and there will always be the internal part of the weld that can cause issues through corrosion or similar. Having no welds and pipes bent to an appropriate radius would always be my recommendation – but obviously you do need to join pipes together. Just minimise the number of welds.

regards
Simon
Simon Doe
Facility Manager, Australian National Fabrication Facility-SA Node
Ian Wark Research Institute | University of South Australia | Mawson Lakes  SA  5095
': +61 8 8302 5226<tel:%2B61%208%208302%205226> | 6: +61 8 8302 3755<tel:%2B61%208%208302%203755> | •: simon.doe at unisa.edu.au<mailto:simon.doe at unisa.edu.au>
http://www.anff.org.au/south-australian-node.html

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From: labnetwork-bounces at mtl.mit.edu [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Garry J. Bordonaro
Sent: Thursday, 18 December 2014 3:35 AM
To: labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] Bending coaxial

From a knowledgeable piping person:


“Bending is the best way to go. Less welds, less chance for particulate contamination and virtual leaks, quicker installation, cheaper to install.”





Garry J. Bordonaro
Microlithographic Engineer
Cornell NanoScale Facility
250 Duffield Hall
Cornell University
Ithaca, NY  14853-2700
(607) 254-4936
bordonaro at cnf.cornell.edu<mailto:bordonaro at cnf.cornell.edu>
http://www.cnf.cornell.edu/




From: labnetwork-bounces at mtl.mit.edu<mailto:labnetwork-bounces at mtl.mit.edu> [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Matthieu Nannini, Dr.
Sent: Tuesday, December 16, 2014 11:33 PM
To: labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu>
Subject: [labnetwork] Bending coaxial

Dear colleagues,

A local company is proposing to bend coaxial SS tubing to install a double containment gas line thus removing the need for welded 90° elbows. did you ever see that ? Any comment would be helpful !

Thanks

Matthieu Nannini

Début du message réexpédié :

De: "Matthieu Nannini, Dr." <matthieu.nannini at mcgill.ca<mailto:matthieu.nannini at mcgill.ca>>
Objet: Bending coaxial
Date: 15 décembre 2014 15:31:10 UTC−5
À: Tom Britton <tbritton at criticalsystemsinc.com<mailto:tbritton at criticalsystemsinc.com>>

Hi tom,

A local company here can bend coaxial tubing. They quoted me 4800$ for the 2 lines BCl3 and SiCl4.

What do you think of bending ? They told me the 1/4 wasn’t kinked at all.

Matthieu

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