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Vigorously advocate the implementation of the industrial model strategy to promote the development of China's metal pipeline industry
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28
02/2021

How to use the elbow

　 Analysis of the main reasons for the decline in the quality of the elbow and the method of attention: 　　1. In pure bending, the outer arm wall of the neutral layer of the tube is thinned by tensile stress &1 under the action of the external force M, and the inner side is under compressive stress. The combined forces N1 and N2 make the cross section of the tube change. Based on this factor, RX and SX are the main reasons that cause the quality of elbows to decrease. Therefore, in GBJ235-82, the RX value under various pressure levels and the amount of thinning on the outside are clearly specified, and the purpose is to control RX. And the value of SX, thus ensuring quality. 　　2. As mentioned in the previous article, when the pipe is bent, the outside of the material is stretched, and the position of the neutral axis under pressure on the inside is different from the bending method. In the top bending (compression bending) work, the neutral axis is about 1/from the outer wall. At 3 locations, the neutral axis is located 2/3 away from the outer wall when working in a rotary bending (return bending type). Therefore, for thin-walled pipes to be bent, it is beneficial to use the spin-bending method. 　　3. The precision of the bent tire is also one of the factors that affect the quality of the bent pipe. When we manufacture bent tires, in addition to the specification and size requirements to be controlled within a certain tolerance range, we also require users to choose the corresponding bent tires according to the bent pipe diameter during use.　 　 　　4. The bendability and surface corrosion of the pipe itself may also affect the quality of the elbow. During on-site construction, the operator also needs to understand the material, processing performance and surface corrosion of the pipeline to be processed.
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How to use the elbow
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27
02/2021

What details should be paid attention to when buying stainless steel elbows?

As a manufacturer specializing in the production of stainless steel elbows, you can produce conventional stainless steel elbows, or you can produce stainless steel elbows with different curvature radii according to the drawings provided by customers, so here we should remind customers to pay attention to some details when buying stainless steel elbows Questions, let’s introduce them in detail below:
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What details should be paid attention to when buying stainless steel elbows?
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05
11/2020

Research on stainless steel elbow

The requirements for stainless steel elbows are very high, and all of them are excellent in research. According to the current status of domestic argon flushing devices for stainless steel pipes, the operation is more convenient and argon saving for the welding quality of Ф60～Ф426mm pipes and elbows. Due to the characteristics of gas, argon filling devices in pipes and elbow welds have been developed. The practical application is excellent. It provides more advanced and effective construction tools for argon flushing in stainless steel pipes.
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Research on stainless steel elbow
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01
03/2021

How to solve the defects of stainless steel elbow?

Although it has played a certain role in ensuring the quality of welding, it has the following problems and defects: 　　 1. It is not applicable or ** not ideal for elbow welds; 　　2. Compared with the sealing with rubber plate, the argon consumption is relatively large (12-15L/min) when using foam sponge to seal, and the sealing material needs to be replaced frequently, which is difficult to meet the argon flushing of the elbow weld.   Solutions: 　　 1. Install a stainless steel corrugated hose at 1/3 of the inflation tube, install a guiding mechanism at the front end of the argon charging device, and rigidly connect with the front end sealing sheet. When the guide mechanism of the argon filling device advances along the curvature of the elbow, the vertical centerline of the front end sealing piece achieves a good sealing**, and the stainless steel hose bends and drives the front end sealing piece to the designed sealing position. 　　2. Install an anti-dropping soft connection mechanism in the inflation tube. When the stainless steel corrugated hose falls off, the front-end guide mechanism and the sealing sheet can be taken out through the soft connection mechanism. 　　3. Paste the masking paper outside the weld. During the welding process, the masking paper burns about 10mm before the arc, which greatly reduces the argon consumption and further improves the welding quality.
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How to solve the defects of stainless steel elbow?
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Address: No. 288, Provincial Road S283, Zhangguandian, Xindian Town, Mengcun Hui Autonomous County, Cangzhou City, Hebei Province

E-mail： ChMoMaKe@micmo.cn

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