SR EN 922:1996

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 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 (K-values corresponding to a series of viscosity numbers for PVC resin are given for information in annex A). The presence of other polymers may invalidate the method (see clause 3).

General information

Status : Withdrawn
Approval date : 3/13/1996
Publish date : 3/14/1996
Withdrawal date : 6/29/2012
Number of pages : 10
ICS : 23.040.20 Plastics pipes,23.040.45 Plastics fittings
Technical Committee : 108 - Plastics, codification and analysis methods

Relations with other standards:

Replaced by SR EN ISO 13229:2012
Conflict with STAS 6675/3-76