HDPE 997 coupling

**QT450 ductile iron shell * *: integrally cast, with high strength and good toughness, impact and pressure resistance, not easy to break, meeting the pressure resistance standards for fire water supply. **Red epoxy powder coating * *: Internal and external epoxy resin coating, anti-corrosion and rust proof, not easy to rust in humid environments, red paint surface is easy to identify on construction sites. **Steel plastic transition flexible structure * *: One end is compatible with groove galvanized steel pipe, and the other end is tightly clamped with flat HDPE pipe, without the need for hot melt or flanges, directly realizing the connection of steel pipe to PE pipe; Flexible structure can absorb thermal expansion and contraction of pipelines, compensate for a small amount of angular displacement, and reduce vibration and noise. **Haf split type, easy to install * *: The split type clamp structure is locked with four bolts and has a built-in rubber sealing ring. Disassembly and assembly do not require cutting off long pipelines, saving time and effort during on-site construction. The HDPE pipeline of the fire protection system is connected to the galvanized groove steel pipe; Municipal water supply and drainage, pump room pipeline renovation, transition connection from steel pipe to PE pipeline; Factory water supply and circulating water steel plastic pipe connection project.