NEN-EN 922
Plastics piping and ducting systems - Pipes and fittings of unplasticized poly(vinyl chloride) (PVC-U) - Specimen preparation for determination of the viscosity number and calculation of the K-value
inactive, Most Current
| Organization: | NEN |
| Publication Date: | 1 December 1994 |
| Status: | inactive |
| Page Count: | 10 |
| ICS Code (Plastics fittings): | 23.040.45 |
| ICS Code (Plastics pipes): | 23.040.20 |
scope:
This standard specifies a method for determining the viscosity number and K-value of a poly(vinyl chloride) (PVC) resin derived from a pipe, fitting or compound. In this standard, only the method for isolation of the PVC resin is detailed, while for the determination of viscosity number reference is made to ISO 174. An equation for the calculation of K-value (according to Fikentscher) from viscosity data is given. The presence of other polymers may invalidate the method. K-values corresponding to a series of viscosity numbers for PVC resin are given for information in annex A.
Document History
NEN-EN 922
December 1, 1994
Plastics piping and ducting systems - Pipes and fittings of unplasticized poly(vinyl chloride) (PVC-U) - Specimen preparation for determination of the viscosity number and calculation of the K-value
This standard specifies a method for determining the viscosity number and K-value of a poly(vinyl chloride) (PVC) resin derived from a pipe, fitting or compound. In this standard, only the method for...