Pig launcher and receiver is a general term for cleaning, receiving, or sending pigging equipment for oil, gas, and other pipelines. The two ends of the installed pipeline are mainly composed of a cylinder, quick opening blind plate, reducer, support, short pipe, and other parts. It has the advantages of simple structure, fast switching, good sealing performance, simple operation, good corrosion resistance, safety, and reliability. Its design and manufacture refer to GB150 steel pressure vessels.