Knowledge

07Jun, 2024

What are the decisive factor in the quality of spiral steel?
How to control the quality of the spiral steel pipe? The perforation temperature of the billet varies depending on the raw materials. The temperature of most thermal inflation weld
07Jun, 2024

The method of forming the spiral tube and the cause of forming seam defects
Spiral buried arc tube rolling tube forming method is the first roll molding method At the time of the upper volume, the bottom surface of the steel pipes of various specifications
07Jun, 2024

Method of length measurement of straight seam steel pipes
1. Measure the length of the grating ruler The basic principle is that the two fixed -length grating ruler is installed on the outer side of the two ends of the straight steel pipe
07Jun, 2024

Causes of abnormal steel pipes
1. The cause of uneven steel pipes is the unevenness of the wall thickness caused by the adjustment of the pilot rolling center line, the inclination angle of the two rolling rolle
07Jun, 2024

The pressure that the spiral steel pipe can bear
The spiral welding steel pipe refers to the steel pipe with a steel tube with a seam with a seam with a steel belt or a steel plate bent to a round, square. According to the weldin
06Jun, 2024

Testing method of small -diameter spiral steel pipe
1. Inspection of physical methods: The method of physical testing is to use some physical phenomena to determine or test. The inspection of the internal defects of the materials or
06Jun, 2024

Steel number identification method of large -diameter spiral tube
Carbon tool steel ① The steel number is "T" to avoid mixing with other steel. ② The number in the steel number indicates the carbon content, which is represented by a few
06Jun, 2024

Weld quality judgment of the spiral tube
The strength of the spiral welding pipe is generally higher than that of the straight seam welded pipe. It can use a welded pipe with a larger diameter of the billet material, and
06Jun, 2024

The connection method of three spiral steel pipes
1 flange connection General flange connection speed, convenient construction, simple tools, but in terms of safety and confusion, most of the project regulations are not met. Gener
06Jun, 2024

Steel shear is commonly used
There are many types of shear machines used by rolling workshop. According to the shape and configuration of the blade of the scissors and the shape of the rolling parts, the shear
05Jun, 2024

What will affect the accuracy of the pipeline leakage of the whole tube of th...
The leakage detection means that after the iron magnetic material is magnetized, the surface and near surface defects are on the surface of the material to form a leakage field. Th
05Jun, 2024

Common welding defects in spiral steel pipes
The defects that are prone to buried arc welding areas include pores, heat cracks, and bite edges. 1. Bubble. The bubbles mostly occur in the middle of the welding road. The main r

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