DIN EN ISO 3459:2015 Plastic piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under negative pressure (ISO 3459:2015); German and English version EN ISO 3459:2015 has been changed from DIN EN 911:1995 Plastics piping systems - Elastomeric sealing ring type joints and mechanical joints for thermoplastics pressure piping - Test method for leaktightness under external hydrostatic pressure; German version EN 911:1995.
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