TCVN 6040-1995 Fittings for unplasticized polyvinyl chloride (PVC) pressure pipes with elastic sealing ring type joints.Pressure test for leakproofness
2008TCVN 6040-1995 Fittings for unplasticized polyvinyl chloride (PVC) pressure pipes with elastic sealing ring type joints.Pressure test for leakproofness