Yearly Archives: 2022
Notes of ERW Steel Pipe When Testing Water Pressure
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...
Advantages and Disadvantages of High Frequency Welding Machine Welding Methods
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...
How to Prevent Seamless Steel Pipe Crack
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...
Analysis of Factors Affecting Welding Quality of High Frequency Welded Pipe
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 ...
Advantages of Spiral Pipes
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
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...
Spiral Steel Pipe Deformations When Sinking Drawing
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...
Processing Technology of Longitudinally Submerged Arc Welding Pipe
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...
Selection of Straight Seam Submerged Arc Welded Steel Pipe
(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...
Several Welding Processes for LSAW Steel Pipe
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...
