Flanged Ductile Iron Pipe

Flanged Ductile Iron Pipe

Flanged pipe and fittings are typical components in rigid piping systems. Flanged pipe is commonly used for surface services of water, wastewater, air, oil and other liquids that require rigid restrained joints. It is widely used in water and wastewater treatment plants, industrial piping systems and other indoor piping as well as outdoor applications such as bridges and other elevated crossings. Flange joints are not generally recommended for use underground due to their rigidity.

Differential settlement or other stresses may cause excessive strain on the flange or pipe due to excessive beam loading. Midas produces DN80-DN2600mm ductile iron flanged pipe in accordance with EN545. The maximum length of flanged pipe is up to 6m, depending on diameter.

Flanged Ductile Iron Pipe Coating:

Internal:

1). Portland cement mortar lining

2). Sulphate Resistant cement mortar lining

3). High-Aluminum cement mortar lining

4). Fusion bonded epoxy

5). Ceramic epoxy

6). polyurethane

External:

1). Zinc with finishing layer of bituminous paint

2). Zinc with finishing layer of liquid epoxy painting

3). Zinc-Aluminum alloy plus liquid epoxy painting

4). Polyurethane

The coating can be accordance with customers’requirements.

Flanged Ductile Iron Pipe Packing:

The pipe diameter under 300mm is bundled with steel belts and over 300mm is in bulk.

Flanged Ductile Iron Pipe Specification:

Standard: EN545

Diameter: DN80-DN2600mm

Length: 0.1m--6m

Pipe wall thickness: K9/K12

Joint Type: flange

Gasket: SBR, EPDM, NBR

Advantage of Flanged ductile iron pipe

Excellent mechanical properties: Ductile iron flange pipes are stronger due to their higher tensile strength and better impact resistance.

Higher safety factor: It has a higher safety factor against pressure surges, water hammer and external impacts.

Significant engineering economics: The thin-wall design process (wall thickness tolerance is controlled at ±1.2mm) reduces the unit length mass by 28%-35% compared with the gray cast iron pipe, saving more than 15% in lifting and transportation costs, which is particularly suitable for long-distance pipeline projects.

The damage during transportation and handling is almost negligible: it will not break due to sudden impact. The loss caused by transportation and handling is minimized.

Reduced pumping costs: The pipeline is lined with centrifugal cement mortar. This makes the inner surface of the pipeline smooth, thus reducing friction losses.

Longer service life and excellent corrosion resistance: The cement mortar lining prevents internal surface corrosion. The external zinc/zinc-aluminum coating, covered with asphalt/epoxy resin, provides strong external corrosion protection.

High dimensional accuracy and superior surface finish: The centrifugal casting of flanged pipes ensures uniform wall thickness and excellent surface smoothness, which cannot be achieved with wet sand casting due to core floating, shifting, or deformation.