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Straight seam steel pipe production temperature and purchasing precautions

Date:2024-04-01View:51Tags:ASTM A312,Steel pipe factory,petro-chemical

The production temperature of straight seam steel pipes: In the process of producing straight seam steel pipes, the temperature must be strictly controlled to ensure the reliability of welding. If the temperature is too low, the welding position may not reach the required temperature for welding. When most metal structures are still solid, it is difficult for the metals at both ends to penetrate and bond together. At that time, when the temperature was too high, there was a lot of metal at the welding position. The texture of these parts is very soft, fluid, and there may be molten droplets. When this metal drips, the same thing happens. Not enough metal penetrates each other. During the welding process, there will be some unevenness and welding seams to form molten holes. Therefore, integrated sewage treatment equipment manufacturers remind us that temperature must be strictly controlled during the production process of straight seam pipelines. Conventional manufacturers have advanced control technology, so they can meet temperature control requirements and ensure product quality during the production process. Therefore, we need to purchase straight seam welded pipes from conventional manufacturers.

What to pay attention to when purchasing directly jointed steel pipes: The procurement industry seems relatively profitable, but it is also relatively difficult. They also brought many difficulties. Many materials have never been seen in projects that have never been seen before. Research and research, let's talk about some key points to pay attention to when purchasing straight seam steel pipes.


Firstly, purchasing requires understanding the type of steel pipe:
1. By type: straight seam steel pipe, seamless steel pipe, spiral steel pipe, etc.

2. Classification of cross-sectional shapes of straight seam steel pipes: square pipes, rectangular pipes, elliptical pipes, flat pipes, semi-circular pipes, etc.


Secondly, there are several points to note:
In the early days of the steel pipe industry, there were many deceptive techniques, but now people are more proficient in this industry, so they can use their naked eyes to identify these techniques.
The wall thickness of the steel pipe is not sufficient to use the gate method. If the nozzle end of the steel pipe is covered with a hammer, it will appear thicker, but when measured with an instrument, the original shape will be revealed.
2. Use straight seams as seamless steel pipes. There are only a few longitudinal welds in the straight seam. Using a machine to polish the entire steel pipe is commonly referred to as polishing. It looks like seamless steel pipes without any difference.
Nowadays, a smarter method is seamless steel pipes. Seamless steel pipes are also thermal expansion steel pipes. After expansion, there is a lead powder inside and burning marks on the outside, but the weld seam cannot be seen. Many larger steel pipes use this type of steel pipe as a seamless material and sell it to earn a large profit.
4. The straight seam steel pipes welded to the fence are polished to produce seamless steel pipes and straight seam steel pipes.