Yearly Archives: 2022

When the hydraulic test of the erw steel pipe is carried out, it is often found that the bursting opening is cracked from the weld of the erw steel pipe, which indicates that the strength of the welde...

High-frequency welding machine welding uses the unique skin effect and proximity effect of high-frequency current, so that the welding current is concentrated on the surface of the contact, the temper...

Domestic high-precision seamless steel pipes generally improve the properties of materials by adding alloys to metals. After cold drawing, seamless steel pipes need to be subjected to stress relief an...

The factors affecting the welding quality of high-frequency welded pipes mainly include the following aspects: (1) Welding pressure It is one of the main parameters of the welding process and affects ...

Spiral pipe has the following advantages: (1) Steel pipes of the same width can be used to produce steel pipes of different diameters. In particular, large diameter steel pipes can be produced from bi...

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...