Gray cast iron pipes, crafted through high-speed centrifuge casting, are known for their flexibility and adaptability. Utilizing a rubber sealing ring and bolt fastening, they excel in accommodating significant axial displacement and lateral flexural deformation, making them ideal for use in seismic-prone areas.
Ductile iron pipes, on the other hand, are crafted from ductile cast iron. Produced via high-speed centrifugal casting and treated with spheroidizing agents, they undergo annealing, internal and external anti-corrosion treatment, and are sealed with rubber seals.
Uses:
• Gray cast iron pipes are primarily used for underground or high-rise drainage in buildings. Compared to ductile iron, gray iron is harder and more brittle. Furthermore, it offers excellent vibration damping and machinability, and is more economical to produce. Gray iron serves in a host of non-mechanical applications, such as hardscape (manhole covers, storm grates, etc.), counterweights, and many other items intended for general human use (gates, park benches, railings, doors, etc.).
• Ductile iron pipes serve as water supply and drainage conduits for municipal tap water, fire protection systems, and sewage networks. As a trustworthy alternative to steel in many engineered applications, DI pipes have a preferable strength-to-weight ratio. Demanding industries include agriculture, heavy truck, rail, recreation, and more. These customers require parts that can withstand extreme forces without breaking or deforming, and that is ductile iron’s reason for being.
Materials:
• Gray cast iron pipes are made from gray cast iron. They have a smaller resistance to impacts than DI, which means that while ductile iron can be used in critical applications that involve impact, gray iron has limits that prohibit it from being used for certain purposes.
• Ductile iron pipes are manufactured from ductile cast iron. The addition of magnesium in ductile iron means that the graphite has a nodular/spherical shape (see image below) conferring higher strength and ductility as opposed to gray iron which is flake shaped.
Installation Methods:
• Gray cast iron pipes are typically installed manually, indoors, or underground within buildings.
• Ductile iron pipes usually require mechanical installation.
Interface Methods:
• Gray cast iron pipes offer three connection methods: A-type, B-type, and W-type, with options of stainless steel clamp connection.
• Ductile iron pipes commonly feature flange connection or a T-type socket interface for connection.
Caliber Units (mm):
• Gray cast iron pipes come in sizes ranging from 50mm to 300mm in caliber. (50, 75, 100, 150, 200, 250, 300)
• Ductile iron pipes are available in a wider range of sizes, from 80mm to 2600mm in caliber. (80, 100, 200, 250, 300, 400, 500, 600, 800, 1000, 2600)
We have included a chart comparing the two irons across a variety of factors. The checkmark in the appropriate column indicates the better choice between the two.
DINSEN specialize in both gray CI and DI pipe systems, offering top-quality products to suit your needs. For further inquiries about our products, please contact us via email at info@dinsenpipe.com.
Post time: Apr-01-2024