I used latex tubing inside foam insulation tubing. The insulation leads
to a more efficient transfer, and contains the broken latex when the
tubing fails.
Phil Dennison.
On 20240903 12:01, Perry Pellechia wrote:
> I have been using a stainless steel line for over 30 years without any
> issues. Anyone that says rubber or plastic is better is putting their
> magnets safety above their people’s safety.
>
> Perry.
> --
>
> Perry J. Pellechia
> Director of NMR Services
> Research Professor
> University of South Carolina
> Department of Chemistry and Biochemistry
>
>
>
>
>> On Sep 3, 2024, at 2:44 PM, Alex Paterson via groups.io wrote:
>>
>> I second the point from Gary. The wisdom I’ve received from multiple
>> magnet engineers is that steel reinforced nitrogen transfer lines are
>> more trouble than they’re worth: low risk of serious consequences.
>> We use natural latex rubber or Teflon tubing for all of our nitrogen
>> transfers, both for supply and exhaust. Yes, they wear out, but
>> they’re inexpensive to replace and provide a comparatively safe point
>> of failure: moderate risk of low consequences.
>> Regards,
>> Alex
>> Alexander Paterson, PhD
>> The National Magnetic Resonance Facility at Madison (NMRFAM)
>> University of Wisconsin-Madison
>> *From:*main_at_ammrl.groups.io<main_at_ammrl.groups.io>*On Behalf Of*Gary
>> Thompson viagroups.io
>> *Sent:*Tuesday, September 3, 2024 13:38
>> *To:*main_at_ammrl.groups.io
>> *Cc:*Gary Thompson <G.S.Thompson_at_kent.ac.uk>
>> *Subject:*Re: [AMMRL] Tubing for N2 fill exhaust?
>> One interesting comment is that Bruker (uk?), certainly at least in
>> conversation with me, _don’t_ recommend steel reinforced tubes as
>> it’s much easier to over pressure your magnet and damage it with
>> them. So they actually recommend a rubber or silicone tube as it will
>> break before you damage your magnet due to overpressure.
>> regards
>> Gary
>> Dr Gary S Thompson NMR Facility Manager
>> CCPN CoI & Working Group Member
>> Wellcome Trust Biomolecular NMR Facility
>> School of Biosciences, Division of Natural Sciences
>> University of Kent, Canterbury, Kent, England, CT2 7NZ
>>
>> ☎:01227 82 7117
>> ✉️:g.s.thompson_at_kent.ac.uk
>> orchid:orcid.org/0000-0001-9399-7636
>>
>> On 3 Sep 2024, at 18:05, Jeff Walton viagroups.io wrote:
>>
>> We have done the same on the fill side so we can use steel
>> braided LN2 hose from the dewar to the magnet. We are going to do
>> the same on the exhaust as we’ve had a few latex hoses shatter
>> recently. You really shouldn’t be using rubber with LN2.
>> Jeff
>>
>>
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Received on Tue Sep 03 2024 - 12:32:43 MST