Steel elbow: the most commonly used is the seamless steel elbow, which is divided into a long-radius elbow and a short-radius elbow. Among them, the long-radius elbow is the most commonly used, and its application is also very extensive.
Steel elbows are distinguished according to 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, and large specifications are generally steel plate butt welding elbows. This process can also be divided into a long-radius elbow and a short-radius steel elbow, and the specifications involved are: around DN500-DN2500.
The use of steel bend pipe is more special than that of the steel elbow, but these two kinds of pipes generally do not conflict.
The distinction of steel bend pipe: according to R: 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 the angle, the angle is also unlimited, and there is also a difference between seamless and seamed, generally a small size that is seamless, and a large size that uses seams, such as spiral welding and so on.
According to the production process: intermediate frequency hot bending process, seamless push process, numerical control processing process.
The difference between steel elbow and steel bend pipe
The above content introduced the elbow and steel bend pipe, so let's get down to business, is there any difference between them? The answer is different. So what is the main difference between the two?
1. Let me talk about the process first: the process of the seamless steel elbow is hot pushing, cold pressing, and hot pressing, and the process of steel bend pipe is intermediate frequency bending, hot pressing, and numerical control bending. Among them, carbon steel is the most commonly used elbow in pressure pipes, alloy steel is hot pushed, stainless steel is cold pushed, and the most commonly used process for steel bend pipe is intermediate frequency bending.
2. The difference in scouring strength: the R of the steel elbow and the steel bend pipe itself are different. R is a position that controls the length of the elbow and the steel bend pipe. The scouring strength of the small R that passes through the medium must be greater than that of the large R. Many, 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 bend pipe, and the steel bend pipe is more resistant to erosion and wear than the elbow.
3. There is also a special case, such as the bridge class. It is necessary to use a large-span steel bend pipe to cross it. At this time, elbows cannot be used, and steel bend pipes are also used for general hot pipes.
Steel bend pipe has 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. Steel bend pipe is widely used in electric power, petroleum, navigation, the chemical industry, and other fields. It is mainly used in oil transportation, natural gas transportation, and infusion, and plays an important role in aircraft and their engines.