Production temperature of straight seam steel pipes: During the production of straight seam steel pipes, the temperature must be strictly controlled to ensure the reliability of the welding. If the temperature is too low, the welding position may not reach the temperature required for welding. When most of the metal structure is still solid, it is difficult for the metals at both ends to penetrate each other and join together. At that time, when the temperature was too high, there was a lot of metal in the molten state at the welding position. The texture of these parts was very soft and fluid, and there might be molten droplets. When such metal dripped, the same would happen. There is not enough metal to penetrate each other. And during welding, 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 welded pipes. Regular manufacturers have advanced control technology, so they can achieve temperature control requirements during the production process and ensure product quality, so we need to purchase straight seam welded pipes from regular manufacturers.
Things to note when purchasing straight seam steel pipes: The purchasing industry may seem relatively lucrative, but it is also relatively difficult. They are also burdened with a lot of hardships. Many materials come out of the project that have never been seen before. Study and research, let’s talk about some points that should be paid attention to when purchasing straight seam steel pipes.
First, purchasing needs to understand the types of steel pipes:
1. By type: straight seam steel pipe, seamless steel pipe, spiral steel pipe, etc.
2. Sectional shape classification of straight seam steel pipes: square pipe, rectangular pipe, elliptical pipe, flat elliptical pipe, semi-circular pipe, etc.
Second, a few points to note:
In the early days of the steel pipe industry, there were many deceptive tricks, but now people are more proficient in this industry, so those tricks can be identified with our naked eyes.
1. The wall thickness of the steel pipe is not enough to use the gate method. If the mouth end of the steel pipe is shielded with a hammer, it will look thicker, but when measured with an instrument, the original shape will be revealed.
2. Use a straight seam as a seamless steel pipe. There are only a few longitudinal welds in the straight seam. Use a machine to polish the entire steel pipe, commonly known as polishing. It will look like there is no gap to act as a seamless steel pipe.
3. Nowadays, there is a more clever method which is seamless steel pipe. Seamless steel pipe is also a thermally expanded steel pipe. After the expansion, there is a lead powder inside, and there are burn marks on the outside, but the weld seam cannot be seen. Many larger steel pipes use this kind of steel pipe to act as seamless and sell it to make big profits.
4. Girth welded straight seam steel pipes use polishing to produce seamless steel pipes and straight seam steel pipes.
Post time: Apr-01-2024