Stainless steel pipes have been purchased and used by customers because of their smooth and high-quality appearance. Since they are favored by consumers, some manufacturers seize consumers' careless mentality and shoddy them, so everyone must be optimistic when buying , Don't buy inferior products, let me tell you how to choose to buy.
1. Check whether the color of the outer surface and the inner wall of the tube is bright and smooth, whether the thickness is uniform or rough. Generally, welded pipes do not need to be inspected for this item, while seamless steel pipes are produced by cold drawing or hot rolling. Improper operation in the production process is likely to cause uneven thickness and cracks on the pipe surface, and rough surfaces are generally seamless pipes. Without polishing treatment, if there is no special requirement on the appearance, it will not affect the use.
2. When purchasing, you should choose excellent products evaluated by the Bureau of Quality and Technical Supervision. Long-term use testimony and good reputation among customers are the most direct and effective way to purchase.
3. Before selecting stainless steel pipes, the use and environment of the stainless steel pipes should be considered. For example, welded pipes are generally used for decoration, seamless pipes are generally used for fluid transportation, sanitary stainless steel pipes are used for medical treatment or kitchens, and thick-walled pipes are used for pressure. Generally, 200 series materials can be used indoors, 304 and other materials should be used outdoors, and more than 316 materials should be used in acid-alkaline places or coastal areas.
In general, the quality of seamed stainless steel pipes is better than that of seamless stainless steel pipes, because seamed stainless steel pipes are made of precision cold-rolled sheets that have passed inspection, so any defects are limited to the welds. Seamless pipes are stamped from stainless steel billets with punches, resulting in many tears in the extruded pipe wall. The eddy current test shows that the defect rate of seamed stainless steel pipes is usually lower than that of seamless stainless steel pipes. With ultrasonic testing, the background noise of seamless stainless steel pipes is so large that it is difficult to find its defects. The background noise of the seamed stainless steel pipe is very low, and it is easy to find the defect.
Under normal circumstances, for the use of stainless steel pipes, we will use them after understanding the models and specifications. We should also fully understand the difference between seams and seamless pipes, and do a good job in post-processing.
