Large-diameter spiral steel pipe factory has many protection methods for spiral steel pipes in winter

Large-diameter spiral steel pipe plant's winter steel pipe protection method: You can use professional pipeline maintenance agent to regularly clean, disinfect and sterilize the sewer pipe to keep the sewer pipe unblocked and prevent the pipe from becoming a hotbed for the propagation of germs. When cleaning pipelines, professional pipeline maintenance products should be used to achieve the effects of sterilization, odor removal and cleaning and anti-blocking. When selecting maintenance products and dredging products, pay attention to the safety of the products, and try to select the products with high sterilization rate and checked by professional authorities.

At present, the demagnetization of large-diameter spiral steel pipes is generally selected by DC demagnetization coils. The demagnetization coil is added to the magnetic particle flaw detector, but the demagnetization effect does not satisfy the customer. The problem is that the DC demagnetization field only generates a reverse half-period magnetic field, which can only let the steel pipe inside. The residual magnetism reverses somewhat, and the external residual magnetism stays within the required range, so the effect is not very stable. Normally, the target can be met at the scene. After the transfer and knocking, the magnetic field is overrun again.

The relatively effective method for detecting the weld of large-diameter spiral steel pipe is to use pulse reflection ultrasonic inspection skills. Because the first is to determine whether there is a defect, here we use a scanning ultrasonic flaw detector. It uses the reflection characteristics of ultrasonic waves. On the fluorescent screen, the vertical coordinate is used to represent the fluctuation of the reflected echo, and the horizontal coordinate is used to represent the transmission time of the reflected echo.

Large-diameter spiral steel pipes have certain specificities in the specific raw materials for manufacturing. This kind of pipeline data is different from traditional pipeline materials. Its particularity is mainly reflected in the characteristics of the hollow cross-section of such pipeline materials. The area is very large. Therefore, the promotion of this type of steel pipe in the field of pipeline transportation is very strong. This type of pipeline information has many advantages and features. As a more professional material, it is in the field of transportation. Obtained great recognition.

In the production of large-diameter spiral steel pipes, misalignment occurs from time to time, and there are many influencing factors. In the production practice, the steel pipe is usually degraded due to the excessive deviation of the wrong side. Therefore, it is necessary to analyze the factors and preventive measures of the occurrence of the wrong side of the small-diameter spiral steel pipe. The location tubes of the butt-welded steel strip welded seam and the D-joint intersecting the spiral welded seam are all checked by X-ray TV or filming. Each steel pipe passes the hydrostatic pressure test, and the pressure is selected from the radial seal.

Structural steel pipes, including various welded pipes and seamless pipes, large-diameter spiral steel pipes have an ideal circular cross-section, so they have strong resistance to local buckling, and are the best lightweight members to withstand radial internal pressure and external pressure. The basic elements made of steel pipes such as columns and beams can be used not only for structures, but also can be combined into various structural types such as frames, diffractors, and grids.