"Richard J Kinch" wrote in message
. ..
Rob writes:

Is there rules of thumb for the amount of interference used?

Given that PVC can have various degrees of plasticizer and filler, no.
Can
be hard like pipe or soft like flex tubing. C'mon.


Hi Richard, that's true but it's pretty hard machining flex tubing the fog
from the LN2 tends to obscure the view

I checked the suppliers website - the description is "Rigid PVC or
unplasticised PVC" and the the data sheet refers to DIN EN ISO 1043
designation U-PVC. Its the garden variety stuff that seems to be in
everyone's stock rack.

rob