Six topics that
cut across items
How tight the tolerance goes, which sterilisation it survives, why PTFE will not bond. Six topics that cut across items, set out from the principal’s stated values.
Tolerance
A tolerance has to be read separately from the nominal value. The same “1.50 mm ID” is a different component at ±0.02 than at ±0.05.
Wall thickness
Wall thickness sets stiffness and inner diameter at once. With the OD fixed, a thinner wall buys inner diameter at the cost of buckling resistance.
Service temperature
A component has to survive sterilisation and reflow. Long-term service temperature and short-term exposure limit are different numbers.
Sterilization compatibility
The sterilisation method constrains the material. Autoclave is a temperature problem; gamma and e-beam are a chain-scission problem.
Surface adhesion
Fluoropolymers do not bond. To join a liner to a jacket, the surface has to be changed first.
Units — mm, inch, French
A converted figure is never a specification. Which unit governs changes how the drawing is read.
Values not yet published
These are asked often, but the principal publishes no figures or test conditions for them. If you need one for a design, ask and we will confirm it.