Standards for flange gaskets used in PVC-C pipes
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Dear experts: I am currently working with a hydrochloric acid storage tank that uses PVC-C pipes, and the flange standard is GB_T 18998.3-2022 – Industrial polyvinyl chloride (PVC-C) piping systems, Part 3: Fittings. Could you please tell me what the corresponding gasket standard is? Thank you for the reply! Thank you so much!
PN10 series PTFE gaskets, or rubber gaskets included with PVC flanges; the rubber gaskets that come with them are not made of EPDM – for reference only
Hello, for the gasketing used with PVC-C pipes, materials that are resistant to acids, alkalis, and corrosion are typically chosen, such as ethylene propylene diene monomer (EPDM) or polytetrafluoroethylene (PTFE). However, the GB_T 18998.3-2022 standard does not specify particular types or standards for gaskets. You can refer to HG/T 20606-2009 \"Non-metallic gaskets for steel pipe flanges\" when selecting gaskets, in order to ensure compatibility and corrosion resistance between the gasket material and the pipe material, thus meeting the requirements for use. .
Does the PN10 PTFE gasket comply with the HG20592 standard?
Yes, PN10 PTFE gaskets can comply with the HG20592 standard. This standard covers the dimensional and material requirements for non-metallic gaskets used with steel pipe flanges, and is applicable to flange connections of various pressure classes. PTFE gaskets are widely used in various media due to their excellent chemical resistance and temperature tolerance, especially in highly corrosive environments such as acids and bases. Make sure to select gaskets that match the dimensions of the PN10 flange to ensure a good seal. .
From the design institute? In actual factories, EPDM has good sealing properties, but will it be corroded by hydrochloric acid? Tetrafluoroethylene is expensive, and rigid PTFE seals do not provide good sealing performance; it depends on one’s needs to decide which to choose.