1 Scope
2 Normative references
3 Terminology
4 Requirements for PTFE semi-finished products
4.1 General
4.2 Dimensions and dimensional tolerances
4.2.1 Skived tape, skived sheet, and film
4.2.2 Moulded sheet
4.2.3 Extruded or moulded rods
4.2.4 Thin-walled tube extruded from coagulated
dispersion powder
4.2.5 Extruded and moulded tubes
4.3 Tensile strength and percentage elongation at
break
4.4 Dimensional stability
4.5 Density
4.6 Hardness
4.7 Colour
4.8 Dielectric strength (DS), breakdown voltage and
electrical flaws
4.8.1 Skived tape, skived sheet and film
4.8.2 Moulded sheet
4.8.3 Moulded basic shape
4.8.4 Rod
4.8.5 Thin-walled tube
4.8.6 Heavy-walled tube
4.9 Requirements that may be specified depending on
the specific application
5 Format for presenting a specification
5.1 Order of presenting codes
5.2 Examples of coding a specification
Annex A (informative) Standard specifications for semi-finished
products of polytetrafluoroethylene