What are the key points for using ductile iron pipes?

Trench Excavation

The groove bottom width should be calculated according to the following formula: B = D1 + 2(b1 + b2)

In the formula: B - Excavation width at the bottom of the pipeline trench (mm); D1 - Outer width of the pipeline structure (mm); b1 - Working face width on one side of the pipeline (mm); b2 - Support width on one side of the pipeline (mm).

2. Groove Support

The design is based on factors such as soil condition in the trench, groundwater levels, the trench cross-section, and load conditions, requiring it to be sturdy and reliable to prevent collapses, with supports not hindering the placement or stabilization of pipes.

3. T-joint pipeline bends should be supported with brackets in both vertical and horizontal directions. Bracket dimensions should be calculated based on factors such as pipe diameter, bend angle, working pressure, etc.

4. When transporting drinking water, pipes should not pass through areas contaminated with toxins. If necessary, protective measures must be taken.

5. All Ductile Iron Pipes connected by socket and spigot must undergo support pier calculations and refer to the National Building Standard Design Collection 10S505, "Support Piers for Flexible Interface Water Supply Pipes."

6. The external anti-corrosion coating for ductile iron pipes should be selected based on the soil conditions of the pipeline site, opting for galvanized and epoxy asphalt coatings or higher-grade coatings as required.