NP 2913-1987 Plastics in contact with food Unplasticized polyvinyl chloride (PVC) pipes for potable water supply. Extractability of lead and tin. Test method
1988NP 2913-1987 Plastics in contact with food Unplasticized polyvinyl chloride (PVC) pipes for potable water supply. Extractability of lead and tin. Test method