Manufacturer customizes DN200 flanged connections for customers, incorporating carbon steel lined with PP/POPE composite pipe steel-plastic lined piping project.The chemical plant transports hypochlorite, sodium hypochlorite, and calcium hypochlorite in steel-lined plastic pipes, which are highly corrosive. These substances are unstable in neutral or weakly acidic conditions, exhibiting strong corrosive properties, which intensify at high temperatures.
    Sodium hypochlorite solution exhibits good stability under slightly alkaline conditions, but decomposes easily as it approaches neutrality, and decomposes even faster and releases chlorine gas under acidic conditions. During storage, sodium hypochlorite gradually decomposes, releasing oxygen, which has a strong oxidizing effect. Therefore, corrosive mediums are present in sodium hypochlorite.HCL、CL2、O、NaOHNo Chinese content provided.NaCLWait, amongOAndNaCLAll are highly permeable media, so in addition to considering the material's resistance to acidic, alkaline, and strong oxidative corrosion, the material's resistance to permeation must also be taken into account.
     Calcium hypochlorite exhibits corrosion similar to sodium hypochlorite, albeit with a lower degree. Titanium metal possesses excellent corrosion resistance in sodium hypochlorite solutions, ensuring that equipment made from titanium will not suffer from oxygen permeation or crevice corrosion issues. Natural rubber, however, will quickly swell and bubble due to oxygen permeation, typically having a limited lifespan.2Year. Soft.PVCPlastics, though possessing excellent antioxidant properties, are subject to aging and cracking over time as the plasticizers within the soft board are gradually extracted by sodium hydroxide. Their lifespan is also limited.2～3Year. Carbon steel tube lining.POThe application of steel-lined plastic pipes with polyolefin anticorrosion materials has proven to be quite effective.