Fluorine-lined butterfly valve
quality inspection The fluorine-lined pipeline and fluorine-lined valve should be inspected in two aspects: 1) Unpacking inspection; 2) Professional inspection. Out-of-the-box inspection, mainly to check the quantity, model, specifications, surface damage, etc.; professional inspection, mainly air pressure test and air tightness test. Check according to standard. The first is the appearance quality, the second is the spot spark inspection, and the third is the inspection of the lining thickness. As for the quantity and model, it is only the most basic verification, which is usually carried out by the warehouse 1. Check the flange flanging for wear 2. Test the valve pressure 3. Determine the thickness of the lining according to the standards of the Ministry of Chemical Industry (technical standards for fluorine-lined pipelines). Whether the fluorine lining process is tight lining, check the thickness of the fluorine lining, see if there is any bubbling phenomenon, check whether the size of the lining kettle tube meets the technical requirements of the process, provide the quality certificate, the certificate of conformity, and provide the material report of the PTFE manufacturer.
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