How to choose high quality stainless steel pipe
Because of themany types of stainless steel pipes, many of the standard brands are listed,and there are many non standard grades which are widely used in fashion. Thesebrands have different performance and are widely used in fashion. These brandshave different performance, so it is very difficult to choose the suitablegrades of stainless steel pipes. It involves expertise in many disciplines suchas materials science, corrosion science and engineering.
Before selectingstainless steel pipes, the use of stainless steel pipes and the use environmentshould be considered. For example: decoration used in general use of weldedpipe, fluid transport generally seamless pipe, medical or kitchen to usesanitary stainless steel pipe, pressure use thick wall pipe; general indoor useof 200 series of materials, outdoor use of 304 and other materials, and in theacid and alkali local or coastal areas generally use more than 316 material.
When selectingsteel pipes, it is necessary to make sure that the material is up to thestandard: 1). from the price analysis, if the 304 material stainless steel pipe iseven lower than the general price of the 301 material on the market, it is verylikely that other materials are impersonating.
2). recognizewhether the "304" mark on the pipe surface is required, and obtainthe manufacturer's quality certificate as the voucher.
3). can be testedwith acid reagent. After 304 seconds, 304 will not change color and 201 willturn black.
4). largequantities of purchased samples can be sent to the national authoritativeInspection Center for component analysis.
To see whether thecolor of the outer surface and the inner wall of the pipe is bright and smooth,whether the thickness is uniform or rough. The general welded pipe does notneed to be checked, but the seamless steel pipe is produced by cold drawing orhot rolling. In the process of production, it is easy to produce uneventhickness and cracks in the pipe surface, and the surface roughness isgenerally seamless pipe without polishing treatment. If there is no specialrequirement on appearance, it does not affect the use.
When purchasing,we should select excellent products evaluated by the quality and TechnicalSupervision Bureau. Long term use of testimony and good reputation is the mostdirect and effective way to purchase customers.
Internal heavyskin, pitting, and rolling green line are often found in the rolling pipe. Ingeneral, these can not be avoided, but it does not affect the use, but we mustchoose as few as possible when choosing, especially the inner surface.