During the production, transportation, and storage of large-diameter ductile iron pipes,-commonly known as "out-of-roundness"-can sometimes occur. If the ellipticity of the spigot is too large, the pipe and the sealing groove cannot fit completely, easily leading to leakage at the joint and affecting the normal operation of the pipeline system.So, what exactly causes this "elliptical" defect?
01 Production process
There is a misalignment between the tube mold and the machine head assembly.
If the pipe mold is not installed correctly, causing excessive deviation between the mold center and the die head center, uneven wall thickness will occur during casting. After heat treatment, the stress in different parts of the cast pipe will be inconsistent, making it prone to elliptical deformation during cooling
During the production process, the precision of adjusting various parameters of the centrifuge directly affects the forming quality of the cast pipe. If the equipment is not properly adjusted, it can easily lead to a series of quality problems, one of which is elliptical deformation.
02 Transportation Process
During transportation, if the pipes are not securely fixed, the bottom support is inadequate, or they are stacked in multiple layers on the vehicle, the large-diameter ductile iron pipes are prone to elliptical shapes due to prolonged compression and vibration caused by their heavy weight.
03 On-site stacking
When large-diameter pipes are stacked in too many layers, the pressure on the bottom pipes far exceeds their radial bearing capacity, and over time they will be flattened and deformed.
04 Jintai Hongye Quality Commitment
We fully understand that "out-of-roundness" directly impacts the sealing safety of pipelines. Therefore, we consistently adhere to
02. To prevent deformation, internal supports are added.
For large-diameter pipes of DN800 and above, we will install cross-shaped support wood inside the spigot. This measure can effectively resist the risk of deformation caused by external pressure during storage and transportation, ensuring that the pipe remains round until it is laid.
From production to delivery, Jintai Hongye ensures that every ductile iron pipe is of high quality and meets installation and usage requirements through rigorous processes and meticulous quality inspections.
As a high-quality ductile iron pipe brand, Jintai Hongye boasts excellent product quality, strict production processes, and a good market reputation, providing you with reliable product and after-sales services.
Product lifecycle management and comprehensive after-sales service.
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