At present, there are many kinds of pipes for water delivery. Outdoor water delivery pipes can be divided into two categories, that is, metal pipes and non-metal pipes. The outdoor metal water pipes that are widely used now mainly include steel pipes and ductile iron pipes. Steel pipes are divided into welded steel pipes...

Derusting levels The surface of steel pipes is generally required to reach the near-white level (Sa2.5) for epoxy, vinyl, phenolic and other anti-corrosion coatings commonly used for steel pipes. The practice has proved that almost all scale, rust and other dirt can be removed by using this level of rust removal, and the...

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,...