Among the common problems of seamless pipes, wall thickness difference and eccentricity take the first place.As the name suggests, it is the difference between the maximum wall thickness and the minimum wall thickness.

The construction process of PHC pipe pile includes the following five aspects: measuring and laying out line, measuring and placing pile position, vertical pile and pile insertion, straightness control and piling.

Pickling passivation is a chemical reaction used to remove rust from seamless steel pipes surfaces. The steel pipe is fully pickled and passivated to remove all kinds of oil stains, rust, oxide scale, welding spots and other dirt, and the surface becomes uniform silver-white after treatment, which greatly improves the corrosion resistance.

The technical requirements of stainless steel pipes include surface quality, mechanical properties, corrosion resistance and process performance.

The essence of high-temperature temper brittleness of seamless pipes is generally considered to be the result of the segregation of impurity elements such as phosphorus, tin, and antimony at the prior austenite grain boundaries, resulting in the embrittlement of the grain boundaries.

In the process of pile driving, the top of the pipe pile is prone to concrete drop angle, cracking, collapse or even the steel bar on the top of the pile is completely exposed and damaged. What are the reasons and preventive measures for this phenomenon?