From:	Bauguitte, Stephane
Sent:	03 October 2011 18:03
To:	Dave.Clifford@baesystems.com; James.Duncan@baesystems.com
Cc:	Devereau, Stephen; Bauguitte, Stephane
Subject:	query re. Synflex 1300 tubing use on ARA

Dear Dave and James,

you 'may' recall my earlier query (see below) regarding the potential use of a 
metal/plastic composite tubing called Synflex 1300 manufactured by Eaton, on 
the ARA.  Following the upgrade of the core chemistry rack and initial results 
from the FGGA this year, I am now looking into upgrading the core chemistry 
inlet and am drafting an instrumentation definition requirement document.  As 
part of the inlet upgrade, we would like to switch the inlet tubing material 
from stainless/steel PFA Teflon to this new material, following 
recommendations from the ground-based measurements community and other 
airborne operators (NOAA-WP-3D Orion / NCAR-HIAPER).  

A specification of the Synflex material can be found here:  
http://hydraulics.eaton.com/products/pdfs/E-HOOV-MC002-M_EURO_CATALOG_GB-DE-
FR.pdf on page 44.

We are looking into either 1300-0440X (1/4" od) or 1300-0660X (3/8" od) type, 
the length of which is ~1 m.

In terms of mechanical properties, this composite tubing is ideal.  The 
question remains if its flammability is Ok on the ARA.  Should it not, a 
suggestion would be to wrap all Synflex 1300 inlet lines with NOMEX (eg 
Roundit2000NX8-5).

Thanks in advance for your advice of the suitability of this new material.

Best regards,

Stéphane


-----Original Message-----
From: Devereau, Stephen 
Sent: 23 April 2010 15:03
To: Bauguitte, Stephane
Cc: Clifford, Dave (UK); Duncan, Jim
Subject: RE: query re. Dekoron tubing use on ARA

Hi Steph,
I've had a look. I think the inportant factor will be flammability, but in my 
brief reading I've not seen anything useful. I think you should continue to 
specify this tube for the FGGA inlet, in the meantime I've copied your message 
to BAE Systems for comment.
Steve


Stephen Devereau
FAAM Technical Manager
Facility for Airborne Atmospheric Measurements
Tel: +44 (0)1234 754523 Mob: +44 (0) 7753 880678
                                              or +44 (0) 7500 973201
E-mail: stde@faam.ac.uk http://www.faam.ac.uk
E-mail: steve.devereau@metoffice.gov.uk

________________________________________
From: Bauguitte, Stephane
Sent: 23 April 2010 11:49
To: Devereau, Stephen
Cc: Bauguitte, Stephane
Subject: query re. Dekoron tubing use on ARA

Steve,

I forgot to ask yesterday about a product I might need to use on the ARA for 
the FGGA inlet.  Not sure if there's a precedent on its use/certification?

For CO2 measurements, most organisations (NOAA, NASA...) don't use PFA/Teflon, 
but Dekoron type 1300 (also known as Dekabon), which is a Metal/Plastic 
composite tubing with proven CO2 compatibility.  I'm after the 1300-06603 
product (3/8" od).

The product datasheet is described here:

http://www.wirexcontrols.com/products.html

then go to 'Tubing' , then 'Metal/Plastic Single Line Tubing'

I wonder if you could comment on the Material characteristics (see ASTM 
classification) suitability on the aircraft?

I've used this tubing for CO2 measurements in snow at Halley.  It's not easily 
collapsable, and its pressure rating is adequate as it is to be used between 
the ASP and core chem rack at ambient pressure.  It can be swaged on its od 
like stainless steel/PFA Teflon tubing with standard Swagelok fittings.  The 
min bend radius (2.25") is pretty good for such a large od tube.

Thanks in advance for your advice.

Stéphane