Stainless steel heat exchange tubes are currently used in a wide range of applications, and people’s demand is gradually increasing. Over time, more and more manufacturers have joined the production. So as consumers, in order to protect our own rights and interests, we should learn to identify inferior stainless steel heat exchange tubes.

What are the characteristics of inferior stainless steel heat exchange tubes? The main ones are as follows:

1. Folding: Inferior stainless steel heat exchange tubes will fold. Folding refers to various fold lines formed on the surface of the tube, which generally run through the entire length of the product. Folding is mostly caused by shoddy manufacturers’ excessive pursuit of high efficiency. The excessive reduction amount causes ears to form in the pipe, which will form folds during the next rolling process. The folded product will cause cracks after bending, thereby reducing the strength of the pipe.

2. Scarring: Scarring will appear on the surface of inferior stainless steel heat exchange tubes, which may be caused by these factors:

① Inferior stainless steel heat exchange tubes are made of uneven material and contain too many impurities.

② Inferior stainless steel heat exchange tube manufacturers have poor sanitation equipment and are prone to sticking to steel. Impurities can easily cause scarring after biting into the rollers.

3. Cracks: Cracks will occur on the surface of inferior stainless steel heat exchange tubes. Because the blank is made of adobe, which has many pores, cracks are formed due to thermal stress during the cooling process, and cracks will appear after rolling.

4. Surface: The surface of inferior stainless steel heat exchange tubes has no metallic luster and is generally light red or pig iron-like in color. It may be caused by these factors:

①The blank is soil culture.

②The temperature of steel pipes rolled from raw materials of inferior pipes is not standard.