This standard specifies a method for determining the resistance to external blows of thermoplasticspipes with circular cross sections by using theround-the-clock method.The method is intended to be applied to isolatedbatches of pipe. For type testing and audit testing,0 0C and/or一20 0C are applicable.NOTE. Pipes made from polypropylene homopolymer (PP-H)which principally can not conform to impact requirements at0 0C or lower temperatures are permitted to be tested at(23土2) 0C under the condition that PP-H pipes are intendedfor use for soil and waste discharge and bear an additionalmarking indicating that they are not to be installedbelow +5 0C.
EN 744-1995由欧洲标准化委员会 IX-CEN 发布于 1995-01-01。
EN 744-1995在国际标准分类中归属于: 23.040.20 塑料管。
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