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Low and medium pressure boiler seamless steel pipe knowledge--51 steel pipe network to provide low and medium pressure boiler seamless steel pipe: used to manufacture a variety of low and medium pressure boilers, superheated steam pipe, boiling water pipe, water wall pipe and locomotive boiler superheated steam Pipes, smoke pipes, small smoke pipes, arched brick pipes, etc. High-quality carbon structural steel hot-rolled seamless steel pipe or cold-rolled (dial) seamless steel pipe. It is mainly made of steel No.10 and No.20. Except for guaranteeing chemical composition and mechanical properties, hydraulic pressure test, crimping, flaring, flattening and other tests are to be done. Hot rolling is delivered in the hot rolled state and cold rolled (dispensed) is delivered in the heat treated state.