We can use the following methods to avoid rust on the surface of carbon steel pipes: 1. Use solvents and emulsions to clean the surface of the steel pipe to remove grease, dust, lubricants and similar organic substances. However, they cannot remove rust, oxide scale, and welding flux on the steel surface, so it is only...

The factors that cause the cracking of welded steel pipes in the flattening test are analyzed from the aspects of experimental equipment, quality of materials and personnel operation, and the main reasons for the cracking of welded pipes in the flattening test are obtained.    The flattening test is one of the...

The finishing process of the steel pipe is an indispensable and important process to remove the defects of the steel pipe, further improve the quality of the steel pipe, and meet the special needs of the product. Finishing of steel pipes mainly includes straightening of steel pipes, end cutting (chamfering and sizing),...

The purpose of reducing the diameter of the steel pipe is to size the pierced billet with a larger diameter to a finished steel pipe with a smaller diameter, and to ensure that the outer diameter and wall thickness of the steel pipe and its deviation meet the relevant technical requirements.   The defects caused by...

Using normalizing, annealing, tempering, quenching and other heat treatment processes can cause defects of steel pipes when they undergo basic processes such as heating, heat preservation and cooling, which may cause defects in the steel pipe. Defects caused by heat treatment of steel pipes mainly include unqualified structure...

The petrochemical industry is comprehensive. The petrochemical industry is inseparable from the use of chemical equipment. Process pipeline design is a very important part in the petrochemical industry. The rational design is related to the quality of the installation of pipelines. From the design...

With the diversified development of the times and the steady growth of the social economy, China's comprehensive strength has been effectively improved. Petroleum is one of the main parts of China's economy. The chemical plant is involved in the petrochemical process. There is a close relationship between the stability...

1. Quality control in the installation process The actual installation of the boiler pipe is not carried out on the flat ground. This also causes the installation of the pipe and bracket to have a direct impact on the extension of the pipeline and accuracy of the pipeline connection. Therefore,...

The particularity of the power plant's manufacturing process puts forward higher requirements for the safety of the steel boiler tubes in the power plant. In the actual installation of steel boiler tubes in power plants, it is necessary to select the appropriate installation method, strictly regulate the...

2. Corrosion analysis of the inlet and outlet pipelines of the acid pump 2.1 Corrosion analysis of the inlet pipeline According to the requirements of PetroChina's alkylation unit corrosion control, when carbon steel is used, the flow rate of sulfuric acid should be controlled at 0.6 m/s to 0.9...

Abstract: 98% sulfuric acid is a highly corrosive strong mineral acid. It has great oxidizing properties, dehydrating, acidity, water absorption and is hard to volatilize. However, at room temperatures, a dense oxide film can be formed on the surface of carbon steel to inhibit the occurrence of corrosion due...

The application background of seamless steel pipes & welded steel pipes under comprehensive pipe gallery engineering conditions Comprehensive pipeline galleries have developed rapidly in China this year. In 2013, the State Council proposed to reform the construction of a municipal underground pipeline...