stainless steel ball valve in the manufacturing process

stainless steel ball valve in the manufacturing process, very easy to contact with other metal iron products. To make stainless steel valves can have no rust, that the easiest way is to do the following process.
First: After rough finished, after pickling must be rinsed clean, if there is sand hole or perforation, should protect its gas TIG welding. Then polished, then solid melting process;
Second: finished processing after the completion of the pressure test. Antirust powder should be added to water to wash.
Third: to make use of wooden packaging during transport, do not touch the metal products.
Fourth: After installing the pipeline, perform periodic maintenance and repair, such as stem out often painted lubricants. Appropriate open and close the Ball valves several times. So that in the ball, the stem, the sealing surface is not easy to assimilate.