Stainless steel pipe has now been used by the majority of customers because of its smooth and high-quality appearance, since it is favored by consumers, some manufacturers seize the consumer's careless psychological state of shoddy, so we must be optimistic when buying, do not buy inferior products, here to tell you how to choose to buy.
First, watch 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 pipe this basic need not check, and seamless steel pipe is produced by cold drawing or hot rolling, improper operation in the production process is easy to produce uneven thickness, pipe surface cracks and other phenomena, and the surface rough is generally seamless pipe without polishing treatment, if there is no special requirement for the appearance does not affect the use.
Second, when purchasing, we should choose excellent products that have been evaluated by quality technology. In the customers have a long time to use the witness and good reputation is the most direct and effective way to buy.
Third, before selecting stainless steel pipes, it is necessary to consider the use of stainless steel pipes and the use environment. For example, welded pipes are generally used for decoration, seamless pipes are generally used for fluid transport, sanitary stainless steel pipes are used for medical treatment or kitchen, and thick wall pipes are used for pressure. Generally, 200 series materials can be used indoors, 304 and other materials need to be used outdoors, and 316 or more materials are generally used in acidic and alkaline places or coastal areas.
In general, the quality of sewn stainless steel pipes is better than seamless stainless steel pipes, because sewn stainless steel pipes are made of precise cold-rolled sheets that have been inspected, so any defects are limited to the weld. The seamless pipe is made of stainless steel billet stamped by punch, resulting in many tears in the pipe wall formed by extrusion. Eddy current test shows that the defective rate of welded stainless steel pipe is usually lower than that of seamless stainless steel pipe. Using 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 welded 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 understand the model specifications and other circumstances after use, for the difference between seam and seamless should also be a comprehensive understanding of the post-processing use.
