Rolled & Welded Steel Pipes

Rolled and Welded Pipes

Thanks to our state-of-the-art machinery and high-quality materials, we manufacture rolled and welded pipes that meet the exact requirements of your application. This type of pipe is produced from sections of sheet metal that are rolled to form cylinders. The seam of each cylinder is welded, and subsequently, the individual cylinders are joined together via welding to form the final pipe.

Our manufacturing facilities are strategically located throughout the region, enabling us to serve the needs of both public and private sector projects. Contractors may contact one of our sales representatives to discuss the exact specifications required for their rolled and welded steel pipes. Our team of experts is at your disposal to advise you on selecting and ordering the ideal piping to meet your project's demands. We guarantee on-time delivery to ensure that your project remains on schedule for completion.

Proudly manufactured in the USA, our steel pipes can be custom-produced to meet the specific design requirements of your project—whether public or private.

Properties of Nucor Skyline Rolled and Welded Pipe

Outside diameters up to 204 inches
Wall thicknesses up to 3.0 inches
Custom lengths and thicknesses
Custom manufacturing services
In-house and external testing capabilities
Cast and manufactured in the USA

Applications of Rolled and Welded Steel Pipes

Steel pipes offer mechanical and physical characteristics that make them one of the most versatile construction products available. As a structural element, steel pipe remains unrivaled compared to alternative materials. The flexibility afforded by the manufacturing process, quality control, and low production costs makes rolled and welded pipe an ideal solution for our project partners.

bearing piles

Deep foundations are required when surface soils lack sufficient strength to support the loads imposed by 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 tubes 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 that would be spent on plates, reinforcing bars, and concrete are better utilized by investing in a larger-diameter, thicker-walled pile. The diameter of pipe piles ranges from a few inches to several feet, and they can be easily spliced together to create piles hundreds of feet in length.

Casing for drilled Shafts

The use of casing—whether temporary or permanent—is often required during the construction of drilled shafts. Such 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.

Structural sections

The symmetry of the pipe imparts equal bending resistance in every direction, making it an excellent product for resisting buckling. The stress required to induce buckling in an axially loaded element decreases as its length increases. The radius of gyration exerts the opposite effect, enhancing 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 spans.

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.

Threaded Casing for Micropiles

Micropiles are small-diameter piles that are drilled and cast in place, in which the majority of the applied load is resisted by steel reinforcement. They are constructed by drilling a borehole—often utilizing casing—followed by the placement of the steel reinforcement and the subsequent grouting of the hole. Micropiles have a wide range of applications and are becoming an increasingly common method for foundation support and reinforcement, seismic retrofitting, slope stabilization, and even earth retention. They constitute an ideal solution for complex sites where low levels of vibration or noise are required, or where access is limited—for example, due to restricted headroom—and drilling proves difficult.

Mining

Mining operations are conducted at great depths beneath the surface, under hazardous conditions. Personnel, equipment, and ventilation shafts constitute integral parts of the mine. Vertical pipe sections are frequently used in the construction of such shafts. The wide range of available diameters and wall thicknesses makes steel pipe the material of choice for meeting the diverse requirements of these shafts. Some of these shafts reach hundreds—if not thousands—of feet in length; in such cases, pipes can be supplied in sections with ends prepared for joining. Additionally, reinforcing rings may be employed to keep pipe wall thicknesses to a minimum.

Signposts, towers, and transmission lines

Signage posts and towers are designed to withstand significant bending loads at the base of the structure. The availability and wide variety of wall thicknesses in large-diameter pipes allow designers to select the exact size required to address their specific project. Furthermore, these pipes can be supplied in long sections, are simple to splice, and are easy to drive into hard ground. Reduction collars can facilitate the splicing of different diameters, making the design as efficient as possible.

Jacked and BORED

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.

Manufacturing Process

Rolled and welded pipe constitutes one of the oldest processes for manufacturing steel pipes. This manufacturing process is employed when the pipe's wall thickness exceeds the capabilities of manufacturing processes utilizing high-frequency electric resistance welding (ERW) and spiral welding.