Specification for flexible duct

[cjccmc]

I need a 2 ft length of 2.5 inch ID duct for an aerospace low pressure air purge application, probably PTFE but other non-flammables could also work. I can find several mfg products that would suffice, but they all go by a trade name. Is there a specification that covers this type of flex duct that I can use for parts list material callout?

 

[berkshire]

I believe that you are looking for Scat or Sceet ducting.
Here is a link:

http://www.hbdthermoid.com/aircraft_ducting.htm

B.E.

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor

 

[cjccmc]

yes that kind of product would work, but unfortunately have to call out a particular supplier and their product name.