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Brief introduction of spiral steel pipe technology is as follows: The first: Appearance quality 1. There should be no cracks, knots, folds, and other defects on the surface that exceed the nominal wa...

After the sinking drawing, the outer surface area of the spiral steel pipe manufacturer is increased, and the surface area of the inner surface is reduced, so a neutral layer appears between the inner...

The main processing methods for longitudinally submerged arc welding pipe are: Forged steel: A pressure processing method that uses the reciprocating impact of a forging hammer or the pressure of a pr...

(1) For pipelines with high peaking requirements, the user's gas consumption is very uneven, the pipeline pressure fluctuates frequently, and the alternating stress of the steel pipe is large. The exi...

The joint formed by the lsaw steel pipe when joining the two connected bodies is called a weld bead. Both sides of the weld are subjected to welding heat during welding, and changes in structure and p...

In the process of manufacturing lsaw steel pipe, lsaw steel pipe manufacturers need to have very good control of the pressing force. This is because during the welding process, when the temperature of...