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How to Distinguish the Difference Between Steel Elbow and Elbow?

Jul. 30, 2020

Steel elbow

The most commonly used is Seamless Elbow, which is divided into long radius elbow and short radius elbow. Among them, the long radius elbow is the most commonly used elbow, and its application is also very extensive.

Elbows are distinguished by specifications:

Small and medium-sized elbows are seamless elbows. At present, the maximum diameter of seamless elbows is 40", which is Φ1020, that is, in the range of DN15-DN1000. Large specifications are generally steel plate butt-welded elbows. For radius elbows and short radius elbows, the specifications involved are around DN500-DN2500.

The use of steel elbows is more special than elbows, but the two types of pipes generally do not conflict.

The distinction of steel elbow:

According to R distinction: r is the radius, usually starting with 3D, until the size required by the working conditions, that is, R is infinite, as long as it exceeds 3D. According to the distinction of angle, the angle is also unlimited, and there is also the difference between seamless and seam. Generally, it is a small seamless size and a large size that uses a seam, such as spiral welding.

According to the production process:

Intermediate frequency hot bending process, seamless push process, CNC machining process.

Seamless Elbow

Seamless Elbow

The difference between elbow and elbow

The above content introduced elbows and elbows, so to get back to the point, is there any difference between them? The answer must be different. So what is the main difference between the two?

1. First talk about the process:

The process of carbon steel degree elbow is hot pushing, cold pressing, and hot pressing, and the process of bending pipe is medium frequency bending, hot pressing, and numerical control bending. Among them, carbon steel is the most commonly used elbow in pressure pipes, alloy steel is a hot push, stainless steel is a cold push, and the most commonly used process for elbows is intermediate frequency bending.

2. The difference in scouring strength:

The R of the elbow and the elbow itself are different. R is a position that controls the length of the elbow and the elbow. The scouring strength of the small R through the medium is definitely much greater than that of the large R, that is, the scouring of the 1D elbow The strength is not as good as the 1.5D elbow. The erosion strength of the 1.5D elbow is lower than that of the elbow, and the elbow is more resistant to erosion and wear than the elbow.

3. There is also a special case, such as bridges. It is necessary to use a large-span elbow to cross over. At this time, elbows cannot be used, and elbows are also used for general heat pipes.

Bend pipes have different uses in different industries. It can freely extend to farther places with the advantage of bending, and the strength of the building will also be reduced. Bend pipes are widely used in electric power, petroleum, navigation, chemical, and other fields. They are mainly used for oil transportation, natural gas transportation, and liquid infusion, and play an important role in aircraft and their engines.

The above has specifically introduced the difference between steel elbows and elbows and how to distinguish related issues. I hope that the above content can help you better understand and use elbows and elbows.