天津市北辰区中关村可信产业园B9-1 Address: B9-1, Trustworthy Industrial Park, Zhongguancun, Beichen District, Tianjin
15522233345 Mobile: 15522233345
许宗涛 Contact: Xu Zongtao
High pressure pipe 5
① Generally, the operating temperature of boiler tubes is below 350 ° C. Domestic tubes are mainly made of hot-rolled or cold-drawn tubes of No. 10 and No. 20 carbon steel.
② High-pressure boiler tubes are often in high-temperature and high-pressure conditions during operation. The tubes are exposed to high-temperature flue gas and water vapor.
Under use, oxidation and corrosion will occur. The steel pipe is required to have high durability strength, high resistance to oxidation and corrosion, and excellent arrangement stability.
① The general boiler tube is mainly used to make water-cooled wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke pipes, and arch brick pipes.
②High pressure boiler tubes are mainly used to make superheater tubes, reheater tubes, air ducts, and main steam tubes for high pressure and ultra high pressure boilers.
(2) GB5310-2008 "Seamless Steel Pipe for High Pressure Boilers". The chemical composition test method is according to the relevant parts of GB222-84 and "Chemical Analysis Methods for Steel and Alloy" and GB223 "Chemical Analysis Methods for Steel and Alloy".
(3) Inspection of chemical composition of imported boiler steel pipes shall be conducted in accordance with the relevant specifications of the contract rules.