13问:我县计划搞半固定式喷灌,管道用改性聚丙烯塑料管,塑料管的联接我们采用利用加热对焊的方法,但没有塑料三通,我们想用铸铁三通,但联接问题不好解决。请问采用塑料管和铸铁承插三通,接缝怎样处理为最好? 山东宁阳县水电局殷建厂答:塑料管和铸铁承插三通的连接,一般不采用环氧树脂胶粘剂粘接的办法。原因是使用环氧树脂胶粘剂粘合时,环氧胶涂层不宜过厚,且要求涂层均匀,涂胶后还要给 Q: I plan to engage in semi-fixed sprinkler irrigation in our county. Pipe joints with modified polypropylene plastic pipe and plastic pipe are welded using heat but no plastic tee. We want to use cast iron tee but the connection problem Not easy to solve. I would like to ask the plastic pipe and cast iron socket tee, how to deal with the seam as the best? Ningyang County, Shandong Yin Jian plant a: plastic pipe and cast iron tee connection, generally do not use epoxy adhesive bonding Approach. The reason is the use of epoxy adhesive adhesive, epoxy adhesive coating should not be too thick, and require uniform coating, but also to give after the glue