EN ISO 13229:2011 无压设施用热塑性塑料管道系统.未增塑聚氯乙烯(氯乙烯)(PVC-U)管道和配件的粘度值和增殖系数粘度值测定
Thermoplastics piping systems for non-pressure applications - Unplasticized poly(vinyl chloride) (PVC-U) pipes and fittings - Determination of the viscosity number and K-value (ISO 13229:2010)