This is also in wn as a part of a common, just as common as flange. In many cases this with a neck butt welding quality is very good, basically is not easy to damage, easy to wear, with a long time, basically is no problem. You can use the term assured, with the welding neck is made from many different materials of the parts, on the surface of the product is a kind of a different product types, there are a lot of protruding surface, concave, and there are a lot of a plane. This is a needle for different places, WN is a lot of imported material production. The general is a product of a Luo Mo steel, and carbon steel production, the product quality is also very good, in a lot of time very durable, basically not damage.
A wn life is long, can be used for a long time. In different places is a product that can be used by all adopt an advanced approach to a production, so in wn is not to worry, when many are used in a lot of pressure pipelines. Due to the use of a material imported materials, in the use of very convenient, but also does not have any problems, the quality of the product is also strictly in accordance with the requirements of the national production