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The purpose of pickling carbon steel pipe is to chemically remove the oxides, rust and oil from the inner surface of the pipe and vessel to obtain the glossy metal floor, to ensure the cleanliness of the inner wall of the pipe, and to prevent rust after pickling But also makes the bottom of the pipe wall metal to be protected to prevent further corrosion, pipeline acid pickling is a key hyperlink in the construction of the pipeline. With the dissolution of iron, the relative improve in the carbon content material of steel pipe, steel pipe brittle; response of hydrogen will penetrate the wall, resulting in hydrogen embrittlement phenomenon; the other iron dissolved too much, wall thinning, pressure decreased. With the pipeline to reduce the efficiency of various, will finally affect the conventional use and life, or even occurred in the pipeline burst accident, and hydrochloric acid on the operator’s harm is particularly large, very inconvenient in operation, acid discharge on the surrounding environment great affect. Therefore, the set up of hydraulic system gear, in addition to pumping station tools, a lot of work is the installation of the pipeline, in the pipeline installation process a very powerful work is the pipeline of online cycle pickling rust, especially carbon steel pipe, as a result of the corrosion ratio stainless steel pipe is critical, and a little water on the return to rust, carbon steel pipe rust process than a lot of complex stainless steel pipe, however the material worth is far cheaper than stainless steel pipe, so 90% of the hydraulic system is used in more than carbon seamless s