2. Socket fusion HDPE pipe fittings, from 20mm to 315mm. 3. Electrical fusion HDPE pipe fittings, from 20mm to 800mm. 2, FAQ A: Advantage (1) High pressure can stand: PN10, PN16, PN35, PN40; 150psi, 235psi etc, as customers' request; (2)Well and high quality contr...