Use of Tube Supports The use of VH tube supports for EO and EO-2 ttings is required in certain thinner wall tubes to ensure proper assembly. or greater is recommended for cold bending of Parker tubes with hand, mechanical and power bending equipment. The following table gives recommended minimum bending radii for pipes at 20☌. The bend radius is established primarily by three different factors: outside diameter (OD) of the tubing, wall thickness, and resin that the tubing is made from. Recommended Bend Radius bend radius of 3 times the tube O.D. The allowable radius of curvature depends on the temperature of the pipe and the SDR. For curves of smaller radius, post formed bends or moulded fittings shall be used. During installation, the minimum allowable bending radius, as shown below, should be observed. Where mechanical joints are used, any joint deflection limitations must be observed. Care must be exercised during construction to prevent over stressing of joints and fittings. Large diameter PE pipes (450mm and above) must be joined together, and then drawn evenly to the desired radius. Tube Design Guide How to Keep Your Design Within Budget Costs increase when you add bend quantities, specify complex bends, specify different radii within a single design, or design a part that requires other extra care during fabrication. Instead, the pipe should be progressively supported with backfill material as the curve is formed. Pegs or stakes are not permitted to achieve the pipeline curvature as these can result in highly localised stresses. This can lead to kinking in small diameter, and/or thin wall pipes. This flexibility enables PE pipes to accommodate uneven site conditions, and, by reducing the number of bends required, cuts down total job costs.Īll PE pipes installed on a curved alignment must be drawn evenly over the entire curve length, and not over a short section. Vinidex PE pipes are flexible in behaviour and can be readily bent in the field.

Tube bend radius chart