The anti-corrosion and usage of steel pipe

The most common pipe gas engineering in the application is steel tube and the main advantages are high strength, big bearing stress as well as easy to welding and heating. Welded steel pipe has many sorts and it can be divided into straight seam welded steel pipe and spiral seam welded steel pipe besides the shape is also different. It has two main types that is square steel pipe and round steel pipe. Comparing the manufacturing technology, straight seam pipe has inimitable advantages. The residual stress of that pipe is close to zero because of the adoption of whole hole enlargement technology while the spiral tube can’t do this. In addition, the stress concentration phenomenon of spiral pipe is serious because of the poor welding line.

The kind of steel pipe is also a problem. Steel pipe prices of the high frequency electric resistance welding is lower than spiral tube and it also has high quality and reliability. PE pipe which makes the PE80 PE tube the main pipe of the small diameter of low pressure gas network has good flexibility, corrosion resistance in the low pressure pipe. Construction area is various with complex underground facilities because city population is large and vehicle is centralized so the requirement for the pipeline selection is higher and higher.

Speaking of corrosion, we all know that surrounding environment is complex so it requires to do a good job of anti-corrosion steel pipe. Now we will talk about something about the corrosion types of steel pipe. It can be divided into uniform corrosion and local corrosion and the most harmful corrosion is local corrosion besides it can also be divided into two types that is micro cell corrosion and macro cell corrosion on the base of the space between the anode zone and cathode zone. Rectangular hollow section is used in the air which is more easily to bring serious corrosion and buried pipelines in soil mainly suffered from electrochemical corrosion and the corrosion process is different.

Different anti-corrosion methods have different quality and cost and our decision should depending on the different pressure and application. In brief, the steel pipe has played an irreplaceable role in the field of city gas and other areas. The existing problems which can lead to the short life time are the aspects of design, construction and maintenance management. It is no doubt that the above issues have other objective factors, but as a professional and technical steel pipe manufacturer in China, we should also have a certain responsibility. Our county city is bound to get wider and more healthy development through our reasonable design and joint efforts.