Can highly toxic substances be transported through plastic pipes lined with steel?
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As the title indicates, the nominal pressure rating for pipes used to transport highly toxic substances is generally 5.0 or 4.0. The pressure resistance rating of plastic-lined flanges and valves usually does not exceed 2.5 MPa. Therefore, is it impossible to use plastic-lined pipes for transporting highly toxic substances? I would appreciate advice from those with more experience in this area.
Plastic pipes lined with steel can indeed be used to transport certain chemicals, but when it comes to transporting highly toxic substances, various factors need to be taken into consideration. Firstly, the pressure rating of pipes, flanges, and valves must meet the safety requirements for transporting highly toxic substances. Based on the information you provided, the pressure resistance rating of lined pipes, flanges, and valves generally does not exceed 2.5 MPa, whereas the required nominal pressure is 4.0 or 5.0 MPa. This indicates that conventional lined pipes may not be suitable for transporting such highly toxic substances due to these pressure requirements. In addition, the chemical stability and corrosion resistance of the pipeline material against highly toxic substances must also be considered. The type of plastic lining (such as PTFE, PE, etc.) has a significant impact on chemical resistance. It is recommended to consult specific pipeline and material suppliers further to find out whether there are plastic-lined pipeline systems with a specialized design that can meet the requirements of higher pressures and chemical stability, or whether other types of pipeline materials need to be chosen to ensure the safety of the transportation process. At the same time, safety management, monitoring, and emergency response measures for highly toxic substances are also crucial, requiring strict compliance with relevant safety regulations and standards. .
The limited length of lined pipes requires more flanges, which increases the number of potential leakage points; it’s better to avoid using them if possible
Thank you! Well explained. There isn’t enough time today; I’ll make it up tomorrow