... Have 10 years history 2.Passed ISO certification PE double wall corrugated pipe equipmentClose type corrugator and vacuum ... , then reduce time to change.Provide dingle sand double wall corrugation pipe head die.ModelSBW×1500SBW×1000SBW×500SBW ... Output1200850600350200100Expansion ModeBelling-on-line,double-wall socket jointBelling-on-line,double-wall socket jointBelling-on-line,double-wall socket joint ...