HUIYI valves manufacturer and valves supplier passed ISO9001:2015 certification, our wholesale valves products could be made according to GB, DIN, JIS, GOST and Europe standard, which meet different customers' demands.

Screw thread pipe fittings exist a lot of problems, many characteristics will affect our screw thread pipe fittings quality problem when we found that the time of the existence of these characteristics, we want to know about our products which have a problem.

This method is in after degreasing, in addition to the surface of the pipe thread pre oxidized after plating a thin layer of metal coating method, and then dip in molten aluminum in aluminum magnet. In general, the pre – plated metal is copper, because the surface of the steel is very easy to deposit copper. The main technology used for electroplating or electroless plating. In the hot-dip aluminum, copper film dissolved in aluminum, and aluminum liquid can contact with the steel surface, reaction and diffusion and the formation of aluminized layer. The thickness of the copper plating layer is about 3-5 mu m when the bottom layer of pre copper plating is used.

The service life of the stainless steel screw thread pipe fittings processing technology of stainless steel screw thread pipe fittings, in the process should pay attention to the following points: stainless steel screw thread pipe fittings elbow pipe has good processing technology, different processing methods used in the process. Stainless steel threaded pipe fittings elbow pipe production process are: conventional semi continuous hot rolling, CSP continuous casting and rolling, plate unit, a furnace volume unit. How to correct processing of stainless steel pipe fittings.