热塑性塑料管道系统 耐化学性初步评价 第3部分：硬聚氯乙烯(PVC-U)、高抗冲聚氯乙烯(PVC-HI)、改性聚氯乙烯(PVC-M)、取向聚氯乙烯(PVC-O)和氯化聚氯乙烯(PVC-C)管道及部件

Thermoplastics piping systems—Preliminary evaluation of the resistance to chemicals—Part 3: Unplasticized poly(vinyl chloride) (PVC-U), high-impact poly(vinylchloride) (PVC-HI) , modified poly(vinylchloride) (PVC-M), oriented poly(vinylchloride) (PVC-O) a