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 Stainless steel welded pipe
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How to see whether the color stainless steel tube is annealed? Foshan color stainless steel pipe manufacturers are not many

Article source: Foshan Quanyu Stainless Steel Co., Ltd Editor in charge: Ample stainless steel
Hotline: 50827-8324 hours
Stainless steel industrial welded pipe is made of steel plate or steel strip through zigzag forming and then welding. It can be divided into longitudinal welded pipe and spiral welded pipe according to the welding mode. Stainless steel industrial welded pipe can be divided into general welded pipe, galvanized welded pipe, oxygen blown welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, car pipe, transformer pipe, welded thin-walled pipe, welded special-shaped pipe and spiral welded pipe. Color stainless steel tube General welded pipe: General welded pipe is used to transport low pressure fluid.

It is made of q195a, q215a and Q235A steel. It can also be made of other mild steel which is easy to weld. Water pressure, tortuosity, flattening and other tests shall be carried out on the steel pipe. There are certain requirements for the surface quality. Generally, the delivery length is 4-10m, and the delivery is often required in fixed length (or multiple length). The specification of welded pipe is expressed by nominal diameter (mm or inch). The nominal diameter is different from practice, Color stainless steel tube According to the specified wall thickness, there are two kinds of welded pipe: general steel pipe and thickened steel pipe. According to the pipe end mode, the steel pipe is divided into two types, with thread and without thread.

1. The pipe can be judged by the echo. Tap each stainless steel pipe and listen to the echo at the pipe mouth. If it is annealed, the echo is higher. Because the crystal structure of annealed parts is uniform and dense, it can produce high tone echo. However, the UN annealed parts can absorb part of the acoustic energy due to many structural defects, so the sound tone at the nozzle is lower and stuffy. Color stainless steel tube If possible, sonar can be used for exploration. 2. The resistance of each stainless steel welded pipe per unit length (such as 6m) is measured with a digital multimeter with good accuracy. The resistance of stainless steel welded pipe is high, which should be measured. The resistance value of annealed steel parts is smaller than that without annealing. Before testing, it should be wiped dry without liquid.

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