Precautions for Spiral Tubes

　　Fixed length Spiral tube It must not be tied or bound. The ends of spiral pipes equipped with wire‑reinforced couplings shall be fitted with threaded protectors. Apply lubricant or rust inhibitor to the threads. The ends of spiral steel pipes may be cut off. As required, protective caps may be installed at both ends of the pipe openings. Packaging for spiral pipes shall prevent loosening and damage during normal handling, transportation, and storage.

　　If the customer requires that the spiral pipe’s appearance remain undamaged upon impact, protective devices may be employed between the spiral steel pipes. Such protective devices can include rubber, straw rope, fiber cloth, plastic, pipe caps, and similar materials. Thin-walled spiral pipes, owing to their relatively thin wall thickness, may be used for rack‑supported applications or as external protective measures on pipe racks. The material of the supports and outer frames shall be identical to that of the spiral steel pipes. If the purchaser has specific requirements regarding the packaging materials and methods for the spiral steel pipes, these shall be specified in the contract; otherwise, the supplier shall provide appropriate packaging materials and methods.

　　Packaging materials shall comply with relevant regulations. Where packaging is not required, it shall be suitable for the intended use and designed to prevent waste and environmental pollution. According to national regulations, spiral steel pipes must be shipped in bulk. If customers request bundling, this may be considered on a case-by-case basis, provided that the pipe diameter falls within the range of 159 mm to 500 mm. Bundled materials shall be secured with steel straps; each strap must be twisted into at least two strands, with additional straps added as appropriate based on the pipe’s outer diameter and weight to prevent loosening. When spiral pipes are loaded into containers, the container floor should be lined with soft, moisture‑proof materials such as textile fabric or straw mats. To ensure even distribution of the pipes within the container, protective supports may be strapped around or welded to the exterior of the spiral steel pipes.

　　The installation, operation, and application of spiral pipes are governed by stringent technical standards; they must be carried out in accordance with the specific project conditions and in compliance with the relevant technical requirements to ensure both construction quality and performance. For commonly used equipment, particular attention should be paid to the following aspects: the installation of components shall be designed based on the construction drawings, and prefabricated pipe support structures must be engineered to suit the on-site conditions. Subsequently, according to the design plan, punching machines should be employed, and bevels should be ground using a grinding machine; welding is then performed. In terms of quality control, the vertical deviation of riser pipes during installation shall not exceed 3 mm per meter, while the horizontal deviation shall not exceed 1 mm. Welding is prohibited at the joints of riser pipes, and care must be taken to avoid welding at bends.

　　Pre‑construction preparations for spiral pipe installation. The trench must be excavated, and the manholes constructed; a variety of products and specialized tools are required, including automatic welding machines, automatic cutting machines, impact drills, and grinding/polishing equipment. Thorough preparatory work should be completed in advance, with all necessary arrangements made systematically. Previously undertaken preparatory tasks should then be consolidated step by step. For surface‑level damage to mechanical equipment, repairs are typically carried out using sleeve assemblies. These sleeves consist of two components: two vertical welds formed by two plates. The welding process employs the Nox electric arc welding method, which has the advantage of eliminating the need for additional welding on the seamless steel pipe itself.

　　The welds are straight, tightly sealed, and free of cracks on the surface. When the spiral‑welded pipe is scratched but remains leak‑free, no double‑fillet weld is required between the waterproof sleeve and the seamless steel pipe body. If leakage occurs, welding must be performed. At that point, the sleeve dimensions have already been designed to withstand the internal structural pressure generated by the fluid.

　　Spiral steel pipes are used in the petrochemical, chemical, agricultural irrigation, and urban construction industries, among others, for liquid transport—such as water supply and drainage—and for gas transport—including natural gas, steam, and liquefied petroleum gas. They also serve structural purposes, such as pile casings, bridge supports, and piping for docks, roads, and building structures. These pipes are manufactured in strict accordance with established production processes.