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Submerged arc steel pipe high-frequency welding process
1. Control of the weld gap: After rolling with multiple rollers, the strip is fed into the welded pipe unit. The strip steel is gradually rolled up to form a circular tube blank with an opening gap. The reduction amount of the squeeze roller is adjusted to control the weld gap to 1~3mm and make b...Read more -
Defects that are prone to occur in the welding area of spiral steel pipes
Defects that are prone to occur in the welding area of spiral steel pipes include pores, hot cracks, and undercuts. The pores in the spiral steel pipe weld not only affect the tightness of the pipe weld and cause pipeline leakage but also become an induction point for corrosion, seriously reducin...Read more -
Selection of submerged arc steel pipes
1. For steel steel pipelines with high peak shaving requirements, due to the uneven gas consumption of users and frequent steel pipeline pressure fluctuations, the steel pipes bear great alternating stress, and the existing defects in the pipes will expand under the alternating stress. If you cho...Read more -
The uses and functions of large diameter straight seam welded steel pipes
1. The uses of large-diameter straight seam welded steel pipes can be divided into oil well pipes (casing, oil pipes, drill pipes, etc.), pipeline pipes, boiler pipes, mechanical structural pipes, hydraulic support pipes, gas cylinder pipes, geological pipes, chemical pipes (high-pressure Fertili...Read more -
The difference between hot simmering steel bending pipe and cold simmering steel bending pipe
The process is as follows: after the straight pipe is cut, an induction coil is put on the bending part of the steel pipe through a steel bending pipe pushing machine, a mechanical rotating arm is used to clamp the pipe head, and a medium-frequency current is passed into the induction coil to hea...Read more -
The difference between galvanized steel pipe and plastic-coated steel pipe
1. The galvanized steel pipe reacts molten metal with the iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Hot-dip galvanizing is to pickle the steel pipe first. To remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in an aque...Read more -
What materials are used for the anti-corrosion treatment of spiral steel pipes
The materials used for the anti-corrosion processing of spiral steel pipes play a decisive role in the quality of anti-corrosion steel pipes. During anti-corrosion processing, the raw materials must be strictly inspected. Different anti-corrosion processing requires different anti-corrosion mater...Read more -
Are generally spiral steel pipes made of Q235
Commonly used spiral steel pipes do not use Q235 material. Commonly used spiral steel pipe materials in China generally include Q235A, Q235B, Q345, L245, L290, X42, X52, X60, X70, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb materials. Spiral pipes, also called spiral steel pipes or spira...Read more -
The use of spiral steel pipes for anti-corrosion
Due to the corrosion of steel pipelines and equipment, production companies have stopped production and the quality of products has declined. It affects the domestic gas supply, heating steam, or hot water supply, and brings many difficulties to people’s lives. Leakage of buried oil, gas, w...Read more -
Classification of welded steel pipes and the uses and advantages of different welded steel pipes
Welded steel pipes can be classified into different types and types according to different classification methods. Welded steel pipes of different properties have different characteristics and characteristics in use and show different use values in use. Welded steel pipes can be divided into the ...Read more -
What is the difference between an ERW welded steel pipe and an ordinary welded steel pipe
“ERW welded steel pipe” is a straight seam resistance welded pipe, abbreviated as ERW. It is used to transport vapor and liquid objects such as oil and natural gas and can meet various requirements of high and low pressure. It currently plays a decisive role in the field of transporta...Read more -
What is the difference between HFW steel pipe and ERW steel pipe
The main difference between ERW (straight seam resistance welding) and HFW (high-frequency welding) is the different principles. As the name suggests, resistance welding is a method in which pressure is applied through electrodes after the welding parts are assembled, and the resistance heat gene...Read more