What is the difference between steel elbow and steel bending pipe? How to distinguish them

First, steel elbow

The most commonly used is seamless elbow, which is divided into long-radius elbow and short-radius elbow. Among them, long radius elbow is the most commonly used elbow and its application is also very wide.

Second, elbows are distinguished by specifications: Small and medium-sized are seamless elbows. At present, the diameter of domestic seamless elbows is 40", that is, Φ1020, that is, within the range of DN15-DN1000. Large specifications are generally steel plate butt welding elbows. This process can also be divided into long-radius elbows and short-radius elbows. The specifications involved are: around DN500-DN2500. The use of steel bending pipe is more special than elbows, but these two pipes generally do not conflict. Third, the distinction of steel ending pipe: According to the R distinction: r is the radius, usually starting with 3D, until the size required by the working conditions, that is, R is unlimited, as long as it exceeds 3D. According to the distinction of angles, the angle is also unrestricted, and there is also a distinction between seamless and seamed. Generally, it is a small size of seamless, and a large size of seams is used, such as spiral welding, etc. According to the production process: medium frequency hot bending process, seamless push process, CNC machining process. Fourth, the difference between elbows and steel bending pipes The above content introduces elbows and steel bending pipes, so let's get back to the point, is there any difference between them? The answer is there is a difference. So what is the main difference between the two?

1. First of all, let's talk about the process: the process of the seamless elbow is a hot push, cold press, and hot press, and the process of steel bending pipe is medium frequency bending, hot pressing, and CNC bending. Among them, carbon steel is the most commonly used elbow in pressure pipes, alloy steel is hot push, stainless steel is cold push, and the most commonly used process for steel bending pipe is medium frequency bending.

2. The difference in scouring strength: the R of the elbow and the steel bending pipe itself are different. R is a position that controls the length of the elbow and steel bending pipe. The scouring strength of the small R through the medium is much greater than that of the large R. That is to say, the scouring strength of the 1D elbow is not as good as that of the 1.5D elbow. The scouring strength of the 1.5D elbow is lower than that of the steel bending pipe, and the steel bending pipe is more resistant to scouring and wear than the elbow.

3. There is also a special case, such as bridges. It is necessary to use a large-span steel bending pipe to cross it. At this time, elbows cannot be used. General hot pipes also use steel bending pipe.

Steel bending pipe has different uses in different industries. It can be freely extended to farther places with the advantage of bending, and the strength of the building will also be reduced. Steel bending pipe is widely used in the fields of electricity, petroleum, navigation, chemical industry, etc. It is mainly used for oil transportation, natural gas transportation, and infusion, and plays an important role in aircraft and their engines.