Before all products leave the warehouse, our quality inspection department will conduct a complete surface roughness test, including the outer and inner surfaces of the product. In most cases, the outer surface roughness needs to be 0.8um, and the inner surface needs to be 0.4-0.5um. This can ensure that the medium flowing through our company’s valves or fittings will be very smooth and will not cause any blockages. Moreover, the smooth surface makes it very convenient for the maintenance and cleaning of the product later on.
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