How to distinguish the angle of elbow knowledge How to look at the angle of 90 degrees and 45 degree

The elbow is one of the pipe fittings often used in the pipeline, it is a joint used to change the direction of the pipeline, if the angle is wrong, the whole pipeline is wrong, so the angle of the elbow must be accurate. Among the total pipe fittings used in the piping system, the proportion is the largest, about 80%. In general, different forming processes are chosen for elbows of different materials or wall thicknesses.

Seamless elbow forming processes commonly used in manufacturing plants include hot pushing, stamping, extrusion, etc.

An elbow is a fitting that changes the direction of a pipeline. According to the angle, there are four most commonly used °, and other abnormal angle elbows such as 60° are also included according to the needs of the project. The materials of wear-resistant elbows include ceramic composite, cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.

The methods of connection with the pipe are: direct welding, flange connection, hot melt connection, electric fusion connection, threaded connection and socket connection.

However, many elbows are marked with 135° in the wear-resistant elbow drawings, so what's going on? It is very confusing for beginners who do not know about wear-resistant elbow making and engineering drawings. Let me explain in detail the difference between a 45-degree elbow and a 135-degree elbow.

Degree elbow and 135 degree elbow are two different angle elbows, 45 degree elbow is less than 90 degree elbow small degree elbow, 90 degree elbow forms a right angle, and 135 degree is an obtuse angle elbow. As shown in the figure below, 45 degree wear-resistant elbow.

45 degree ceramic wear-resistant elbow.

90 degree ceramic wear-resistant elbow.

2. Some 135-degree elbows are actually 45-degree elbows, but the positions marked on the drawings are different, the angle of the elbow is the angle between one of the nozzles and the horizontal line, and some wear-resistant elbow drawings mark the angle between the two nozzles, and some are the outer corners of the elbow, and some are diagonal, so the difference is 90 degrees, and the drawings shall prevail. I don't understand it very well, so refer to the figure below for comparison.

Different labeling methods for wear-resistant elbows.

Drawings of wear-resistant elbow design institute.

The wear-resistant elbow drawing should see the angle of the elbow to better determine the angle of the elbow, so as not to affect the on-site installation.

1. Naked eye observation: the extension wires of the two nozzles of the 90-degree elbow are vertical, while the extension wires of the two nozzles of the 45-degree elbow intersect into an acute angle.

2. Look at the pipe: the 90-degree elbow is formed by the two sides of the receiver, and the 45-degree elbow is formed by the obtuse angle after the receiver on both sides.

The degree elbow is long, while the 45 degree elbow is shorter. An elbow is a type of pipe fitting used at the bend of a pipeline. Of the total fittings used in the piping system, the proportion is large, about 80%. In general, different forming processes are selected for elbows of different materials or wall thicknesses.

The degree elbow and the 90 degree elbow are connected on both sides respectively, and it can be seen that the 90 degree elbow forms a right angle, and the 45 degree one is an obtuse angle.

First of all, you need to decide according to your own spatial concept, 90 degrees is the state of right angles, and 45 degrees is semi-right angles.

Elbows are one of the commonly used fittings in pipelines. It is a joint that is used to change the direction of the pipe. If the angle is wrong, the entire pipe is wrong.

Therefore, in all piping systems used, the angle of the elbow must be precise. In pipe fittings, the proportion is the largest, about 80%. In general, different forming processes are chosen for elbows of different materials or wall thicknesses.

Fittings that change the direction of the pipe.

How to distinguish a 45 degree elbow from a 135 degree elbow? Hello dear, one, 45 degree elbow, refers to the elbow two port section of the shape of the late waxing angle of 45 degrees, and the two ends of the straight pipe will form a 135 degree angle. That is to say, when the tube is filled with fluid, the angle of fluid flow will change to 45 degrees; Second, the 135-degree elbow is just the opposite of the 45-degree elbow, which means that the angle formed by the cross-section of the two ports of the elbow code is 135 degrees, and the straight pipe connected to the two ends will form a 45-degree angle.

The angle of the elbow can be measured with a semi-circular instrument, the calculation formula of the arc length of the elbow is simple, and the bending radius * is the formula of the arc length.

45 degree elbow welded flange.

If you want to learn the basics of elbows, you can go to the library to have details**.

Press the desired angle.

Just re-cut it.

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The differences are as follows: Naked eye observation: the extension wires of the two nozzles of the 90-degree elbow are vertically blind, while the extension wires of the two nozzles of the 45-degree elbow intersect into an acute angle.

2. Look at the pipe: the 90-degree elbow on both sides of the tube is formed by a right angle, and the 45-degree elbow is formed by an obtuse angle after the two sides of the elbow.

The differences are as follows: Naked eye observation: the extension wires of the two nozzles of the 90-degree elbow are vertically blind, while the extension wires of the two nozzles of the 45-degree elbow intersect into an acute angle.

2. Look at the pipe: the 90-degree elbow on both sides of the tube is formed by a right angle, and the 45-degree elbow is formed by an obtuse angle after the two sides of the elbow.

The differences are as follows: Naked eye observation: the extension wires of the two nozzles of the 90-degree elbow are vertically blind, while the extension wires of the two nozzles of the 45-degree elbow intersect into an acute angle.

2. Look at the pipe: the 90-degree elbow on both sides of the tube is formed by a right angle, and the 45-degree elbow is formed by an obtuse angle after the two sides of the elbow.

The differences are as follows: Naked eye observation: the extension wires of the two nozzles of the 90-degree elbow are vertically blind, while the extension wires of the two nozzles of the 45-degree elbow intersect into an acute angle.

2. Look at the pipe: the 90-degree elbow on both sides of the tube is formed by a right angle, and the 45-degree elbow is formed by an obtuse angle after the two sides of the elbow.

In the maintenance of pipelines in power plants and steel mills, it is often necessary to replace wear-resistant elbows, but accurate data must be measured for easy installation. It is a headache for technicians, who need to measure the elbow site is complex, and some are still working at height. The following is a technical technique for measuring the bending radius and angle of a bend or missing head.

Measurement data is required for on-site measurement of wear-resistant elbows.

The elbow has various angles of 90 degrees, 45 degrees, 60 degrees and 30 degrees. The following is a 90-degree elbow, which is divided into 2 parts and is a 45-degree elbow, and the same is a 30-degree elbow that is divided into 3 parts, one of which is a 30-degree quiet bend shirt.

90 degree elbow.