Spiral Welded Pipe

Spiralweld Pipe

Nucor Skyline possesses extensive experience in manufacturing pipe piling products for the North American steel foundations industry. Thanks to our strategically located manufacturing plants, we can meet the steel requirements of any project—public or private—throughout the region.

Properties of Nucor Skyline Spiralweld Pipe

Outside diameters up to 120”
Wall thicknesses up to 1”
Custom lengths and thicknesses
Custom fabrication services
Accepted by Departments of Transportation (DOT) in seismically active zones
In-house and third-party testing capabilities
Cast and manufactured in the USA

Applications of Nucor Skyline Spiralweld Pipe

Bearing pile

Deep foundations are required when surface soils lack sufficient strength to support the loads originating from the structure. Pipe piles are commonly used in deep foundations to transfer building loads to stronger soil strata located at significant depths underground. These loads are resisted through a combination of lateral friction and end-bearing resistance. The pipes can be driven with either an open or closed end, utilizing points or plates. If driven with plates, the pipes can subsequently be filled with concrete to enhance the pile's strength. Generally, however, the funds invested in plates, reinforcing steel, and concrete would be better utilized by allocating them toward a larger, thicker pile. The diameter of tubular piles ranges from a few inches to several feet, and they can be easily spliced together to create piles hundreds of feet in length.

Drilled Shaft Casing

The use of casing—whether temporary or permanent—is often required during the construction of drilled piles. This casing is employed to keep the borehole open while the reinforcement cage and concrete are being installed. The ability to inspect the bottom of the borehole, combined with the elimination of any variations in the diameter of the finished drilled pile, results in a final pile of substantially higher quality. In its "Standard Guidelines for the Design and Installation of Pile Foundations," the ASCE recommends applying a safety factor that is 38% higher to the structural capacity of drilled piles constructed without casing, compared to those constructed with casing.

Combined Walls

Large-diameter pipes possess high flexural strength and are frequently used in combined sheet pile walls. The combination of large-diameter pipe piles and steel sheet piles—a system often referred to as "combi-walls", pipe-Z walls, or king pile walls—constitutes a highly efficient system. As with other combined walls, the main pile supports the majority of the load, while the sheet pile transfers that load to the pipe and to the ground.

Structural sections

The symmetry of the pipe gives it the same bending strength in every direction, making it an excellent product for resisting buckling. The stress required to induce buckling in an axially member decreases as its length increases. The radius of gyration has the opposite effect, increasing a section's capacity to resist buckling. W and HP sections feature different radii of gyration (rx and ry) for the X and Y axes, whereas in the case of a pipe, this value remains constant. The net result is that a pipe can withstand considerably greater loads over long, unsupported lengths.

Jacked and BORED pipe

The installation of underground utilities is often carried out through pipe jacking and boring. Sections of pipe are pushed through the ground using hydraulic jacks, either between excavation pits or beneath existing ground elevations. The next section of pipe is then coupled to the previous one, and the jacking process continues. Once the jacking process is complete, the interior of the pipe is cleared to allow for the installation of the utilities. This method enables the laying of utility lines without the need for extensive excavation, which could otherwise cause disruptions to roads, railways, homes, and businesses.

Piping for Sewer and Water Lines

Welded steel pipe constitutes an effective method for the transport of liquids, air, and gases. Steel pipe is, pound for pound, stronger than any other type of conveyance piping. Pipes can be designed to withstand both the internal and external pressures encountered in most applications. Welded steel pipe offers numerous advantages, such as strength, economy, and ease of installation. Nucor Skyline is SPFA-certified and manufactures hydrostatically tested pipe with outside diameters ranging from 10-3/4" to 90". Our production process employs double submerged arc welding for both spiral-weld pipe and rolled-and-welded pipe. Hydrostatically tested pipe lengths range from 30 to 60 feet, with wall thicknesses from 0.250" to 2.0", and are manufactured in accordance with one of the following industry standards: AWWA C200, ASTM A139, or ASTM A134.

Advantages of Using Nucor Skyline Spiralweld Pipe

The use of spiral-welded pipes offers various benefits. As previously mentioned, this type of pipe subjects the weld to less stress than its straight-welded counterpart, thereby enabling it to withstand higher pressure. Spiral-welded pipe is more flexible and customizable, making it possible to manufacture larger diameters and greater lengths with varying levels of specification. Another benefit of spiral-welded pipe is its efficiency and cost-effectiveness, which expands the scope of project feasibility at a lower cost.