(1)生产制造方法：①一般锅炉管使用温度在350℃以下，国产管主要用1

(1) manufacturing methods: <br>① generally a boiler tube temperatures below 350 deg.] C, made by the main pipe 10, No. 20 carbon steel pipe manufacturing hot-rolled or cold-drawn tube. <br>② high-pressure boiler tubes often at elevated temperature and pressure conditions used in the tube under the action of high temperature flue gas and water vapor, oxidation and corrosion occurs. It requires persistent steel with high strength, high oxidation resistance, and good structural stability.

(1) Manufacturing methods:<br>(1) The general boiler tube use temperature is below 350 degrees C, the domestic tube is mainly manufactured with the 10th and 20th carbon-junction steel hot-rolled tubes or cold-drawn tubes.<br>(2) When used in high-pressure boiler tubes, it is often in high temperature and high-pressure conditions, and the tubes are oxidized and corroded under the action of high temperature fume and water vapor. Steel pipes are required to have high long-lasting strength, high antioxidant corrosion, and good tissue stability.

(1) manufacturing method:<br>① generally, the use temperature of boiler tubes is below 350 ℃, and the domestic tubes are mainly made of No.10 and No.20 carbon steel hot-rolled tubes or cold drawn tubes.<br>② the high-pressure boiler pipe is often in high temperature and high pressure conditions when it is used. Under the action of high temperature flue gas and water vapor, the pipe will be oxidized and corroded. The steel pipe is required to have high endurance strength, high oxidation resistance and corrosion resistance, and good structure stability.<br>