In high-frequency longitudinally welded pipes(ERW steel pipe), the manifestations of cracks include long cracks, local periodic cracks and irregular intermittent cracks.

From the manufacturing process and product characteristics, the formation of a thin oxide film on the surface of thick-walled seamless pipes prevents oxidation.

The stainless steel welded pipe is welded by steel strips. The welded pipe has a uniform wall thickness, high brightness inside and outside the pipe, and can be made into a thin-walled pipe.

Analysis of problems encountered The problems usually encountered in the piling process of micro steel pipe pile are: ①Failed to hit the design depth; ② The pile body is damaged; ③Although it has reached the design depth, it cannot be stopped; ④ The deviation or inclination of the pile exceeds the allowable value; ⑤Compared with the record of foundation survey or test pile, the driving condition ...

The main advantages of prefabricated piping spools 1. In a controlled environment, the quality of work is easier to manage and maintain. 2. Due to the high accuracy, the specified tolerance can avoid on-site rework....

After the steel sheet pile construction starts, how can the foundation pit be excavated, and what matters should be paid attention to when the foundation pit is excavated?