长相思生产的氯甲院专用加料管，已经申请国家专利。其特点在于衬层采用特殊工艺成型的PFA材料，内管胀接，外管胶接加固定销固定，所有法兰接口均采用整体模压成型。由于是同种衬层PFA材料，所有焊缝的焊接完全融合成一体。避免了焊缝在高温和高气流震动的情况下开裂和产生泄器的危险。该PFA加料管可以在200°c高温长时间运行，具有耐强腐蚀和强渗透的特点。

The special feeding pipe for Chloromethane reactor produced by our company is our patent product. Its characteristic is that the lining layer is made of PFA material formed by a special process, the inner tube by expanded, the outer tube by glued and fixed with a fixed pin, and all flange interfaces are integrally molded. Due to the same lining PFA material, all welding seams are completely integrated into one. The danger of cracking and leakage of the weld under the conditions of high temperature and high air flow vibration is avoided. The PFA feeding tube can be operated at a high temperature of 200 °C for a long time, and has the characteristics of strong corrosion resistance and strong penetration resistance.