China is a world power with the third largest land area in the world. Different regions have different cultural differences. Because of this, there are also great differences in the use of flanges, especially in Northeast China

Stainless steel flanges will not produce corrosion, pitting, rust, and are not easy to be worn. Stainless steel is one of the strongest materials in construction metal materials. Because stainless steel has good corrosion resistance

Even in a world of cheap plastics and microchips, there is no doubt about the importance of steel to the world economy: global steel production still stands at 1.6 billion tons, worth $900 billion. From ships to skyscrapers, from cars to cookers, steel is essential to everyday life.

Cast flange, rough shape, accurate size, small amount of processing, low cost, but casting defects (pores). Cracks (inclusions) castings of the internal structure of the shape is not good (if cutting, streamline worse);