... with Steel Belt Reinforcement ,pe pipe internal diameter:200-2600mm Impact-proof Polythene Screw Ripple Pipe with Steel Belt Reinforcement ,pe ... /m2, SN10≥10kN/m2, SN12.5≥12.5kN/m2 Impact strength: ≤10% Peeling strength: (20±5°C) N/cm≥70 Ring flexibility: no ... stratification, no dehiscence Oven test: no stratification, no dehiscence Tensile strength of fuse seam and welding seam: N≥1,460 Creep ...