ISO 3127:1980 Unplasticized polyvinyl chloride (PVC) pipes for the transport of fluids; Determination and specification of resistance to external blows
1994ISO 3127:1994 Thermoplastics pipes - Determination of resistance to external blows - Round-the-clock method
1980ISO 3127:1980 Unplasticized polyvinyl chloride (PVC) pipes for the transport of fluids; Determination and specification of resistance to external blows