DS EN 1277:2004
DS EN 1277:2004 Plastics Piping Systems - Thermoplastics Piping Systems For Buried Non-Pressure Applications - Test Methods For Leaktightness Of Elastomeric Sealing Ring Type Joints Defines three basic test pressures for determining the leaktightness of elastomeric sealing ring type joints for buried thermoplastics non-pressure piping systems.