Swivel joint is a kind of high pressure fluid control products, which is commonly applied to cementing and fracturing equipment. Swivel joint is a kind of high pressure fluid control products, which is commonly applied to cementing and fracturing equipment. It is used to change the pipeline connection direction, to make it more convenient and easier to connect the pipe fittings. It is widely used in acid working environment, to connect the high pressure discharge pipe, suction pipe, temporary flow pipeline, well test line and high pressure transmission line.