If you have recently paid attention to the construction of docks or deep-water projects, you might have noticed a trend: the diameters of the steel pipes used for piles are getting larger and larger.
This is not an illusion. As the scale of infrastructure projects increases, especially for projects like deep-water terminals, the demand for large-diameter pile foundations has risen rapidly. When the diameter is large, ordinary straight-walled pipes are not very suitable, and more people are turning their attention to spiral welded pipes.
But when the diameter becomes larger, problems arise.
Large-diameter spiral welded pipes are used in pile foundations. Their load-bearing capacity is usually not a problem. What really causes headaches are two details: one is whether the specifications are uniform, and the other is whether the joints can truly achieve sealing.
Here, we have to mention a key design - Interlock Seal On Piling Pipes. To put it simply, this structure is designed to address the potential gap issues that may occur during the connection and sinking process of large-diameter pipe piles. It is not a simple "compression", but rather, through the interlocking structure, it creates a continuous sealing band at the joint. Especially in deep-water environments, where the external water pressure is high and the soil has strong permeability, without a reliable interlocking seal, it is very likely to cause problems over a long period of use.
Why does the specification of spiral welded pipes affect the sealing effect?
Many people think that sealing is only related to the process. In fact, the essence lies in the specifications. The Spiral Welded Pipe Specification determines the shape of the weld, the way the steel strips are joined, and whether a stable interlocking structure can be achieved in the end.
When our Cangzhou Spiral Steel Pipe Group determines the specifications, they will directly incorporate the requirements for interlocking sealing into the design stage. For instance, the angle of the spiral, the height of the weld seam, the shape of the steel strip edge treatment - all these factors will affect whether the subsequent sealing can "lock in place". Not all spiral welded pipes are suitable for interlocking sealing. If the specifications are not determined correctly, even if the welding is done perfectly later, it will be in vain.
How we did it
Over the past two years, the large-diameter steel pipe piles we supplied for the Deepwater Terminal project were all designed with high-standard interlocking and sealing. The advantages of spiral welded pipes - fixed length per meter and uniform welds - precisely complement the interlocking structure, extending the length of the sealing section and reducing the number of intermediate joints.
Moreover, we ensure that for each batch of pipe piles, the Spiral Welded Pipe Specification clearly indicates the relevant parameters for interlocking sealing. It's not just writing the word "interlocking", but actually listing the groove type, tolerance, and locking force range on paper. When the customers receive the products and perform on-site assembly, they can clearly feel that it is securely locked in place, with a perfect fit.
Regarding us
Cangzhou Spiral Steel Pipe Group Co., Ltd. was established in 1993 in Cangzhou, Hebei Province. It covers an area of 350,000 square meters and has 680 employees. It produces 400,000 tons of spiral steel pipes annually, with an output value of 1.8 billion yuan. It has always focused on spiral steel pipes and coating products. Not everything can be produced, but in the field of spiral welded pipes, from materials to specifications to interlocking seals, we have been very meticulous.
If you are undertaking a project involving large-diameter pile foundations, especially in deep-water environments, it is recommended that you pay close attention to Interlock Seal On Piling Pipes and Spiral Welded Pipe Specification. Once the specifications are correct and the sealing is done properly, you can truly rest assured when the pipes are buried.
If you have any questions, feel free to ask directly. No empty talk, no forced persuasion. We can discuss the technology, the specifications, or the on-site construction.
Post time: Apr-23-2026