Spiral steel pipes are mainly used for water supply, heating, pile foundation engineering, etc. Usually, long-distance transportation is a long-term investment process. The construction party should extend its service life and ensure that it is intact during the construction period. How to improve the service life of spiral steel pipes during the contract period? Carry out detailed analysis from the following aspects.

Before use, the spiral steel pipe must be anti-corrosive inside and outside. After the on-site connection is completed, the joint must be corrosion-proof in a suitable place, especially inside. Corrosion is generally internal corrosion. Through the transformation of the old pipeline at the construction site for many years, the serious corrosion site is the joint of the steel pipe.

After mechanically hoisting the spiral steel pipe construction site, the outer wall corrosion must be destroyed, and the damaged area should be repaired with PE heat shrink tape in time to prevent large-scale corrosion. The Wanli Dam collapsed in the ant cave. This is the reason. Strengthen the later maintenance after the operation of the pipeline, especially the exposed spiral steel pipe.

The theoretical pressure value of the spiral steel pipe is the calculated value of the hydrostatic pressure of the spiral steel pipe, which is different from the working pressure of the spiral steel pipe. When the spiral steel pipe works, the internal medium is flowing, so the working pressure is different from the theoretical pressure. The theoretical value of the hydrostatic pressure of the spiral steel pipe is calculated from the outer diameter and the wall thickness of the spiral steel pipe, and is usually calculated as follows. Thickness/OD.

When designing the pressure of spiral steel pipe, the theoretical value cannot be simply used for calculation. If the wall thickness of the spiral steel pipe is less than 6 mm, the standard hydraulic pressure value of the spiral steel pipe cannot be calculated because the standard of the spiral steel pipe less than 6 mm cannot be used.