socket plastic flange,FRPP flange, plastic flange 1)Material:CPVC, UPVC, FRPP, PVDF, PPH 2)Size: DN15-300 socket plastic flange,FRPP flange, plastic flange1)Material:CPVC, UPVC, FRPP, PVDF, PPH2)Size: DN15-300 socket plastic flange,FRPP flange, plastic flange