Spiral Pipe Manufacturer: Factory Inspection and Stacking Requirements for Spiral Pipes

　　 Spiral pipe manufacturer We’re sharing the factory‑inspection results for spiral pipes—let’s take a look!

1. Visual Inspection: This is an important component of final product inspection, primarily used to detect surface defects in welds, dimensional deviations, and the joints of raw material plates. Inspection is typically performed by visual observation, with the aid of standard samples, gauges, and magnifying glasses. If surface defects are present in the weld, internal defects are likely to exist as well, and the distance between the raw material joint and the pipe end must not exceed 1,100 mm.

　　2. Physical Testing Methods: Physical testing methods involve using specific physical phenomena to measure or inspect products. For detecting internal defects in raw materials and workpieces, a hydrostatic pressure test is typically performed after spiral pipe forming, followed by nondestructive testing. Nondestructive testing techniques include ultrasonic testing, radiographic testing, penetrant testing, and magnetic particle testing, among others.

　　According to the quality‑inspection results of spiral pipes, they can be classified into three categories: qualified products, reworked products, and rejected products. Qualified products are those whose appearance and intrinsic quality meet the relevant national standards as well as the technical specifications for delivery and acceptance. Reworked products have defects in either their appearance or internal quality that do not fully comply with the required standards and acceptance criteria, but may be repaired to a level that satisfies the applicable standards and acceptance conditions. Products that fail to meet the criteria after rework are deemed scrap; scrap refers to spiral pipes whose appearance or internal quality is non‑conforming and which cannot be repaired, or whose repaired condition still does not meet the required standards and acceptance criteria.

　　Spiral pipe manufacturers’ guidelines for stacking spiral pipes:

　　1. Product stacking shall, while ensuring stability and safety, be organized by type and standard palletization, with different material categories kept separate from the pallets to prevent mud accumulation and mutual corrosion.

　　2. Prohibit the storage of corrosive materials around the spiral pipe stacking area.

　　3. The bottom of the helical pipe piles shall be raised, consolidated, and leveled to prevent the materials from becoming damp or deforming.

　　4. The spiral pipe manufacturer stipulates that identical materials shall be stacked separately according to the receiving slips.

　　5. For spiral‑shaped steel pipes stored outdoors, we typically place wooden pallets or stone blocks underneath and incline the stack slightly to facilitate drainage after rainfall. Additionally, ensure that the materials are laid out straight and evenly to prevent bending or deformation.

　　6. The stacking height of spiral pipes shall not exceed 1.2 m for manual handling, 1.5 m for mechanical handling, and the chimney width shall not exceed 2.5 m.

　　7. The spiral pipe manufacturer states that adequate aisles must be maintained between stacks; inspection aisles are typically 0.5 m wide, while access and handling aisles vary in width depending on the material’s dimensions, transportation requirements, and equipment design, generally ranging from 1.5 to 2.0 m.

　　8. Open-air stockpiles of angle steel and channel steel shall be bent with the flanges facing downward; I-beams must be stored with their flanges oriented downward to prevent water‑induced rust.

　　9. Elevate the base of the stack: if the warehouse is on a sunny concrete floor, the elevation should be 0.1 m; if the ground is silt, it should be 0.2–0.5 m high. For open-air storage areas, the elevation should be 0.3–0.5 m on concrete surfaces and 0.5–0.7 m on sandy or muddy ground.