- Apr 13, 2018-

# How to calculate 90 degree elbow dimensions

All elbow products are produced under the standard requirements. Our company only produces up to standard products. Now, let’s talk about How to calculate 90 degree elbow dimensions. Such as 10 inch 90 degree elbow dimensions, when we have the chart, how can we calculate other data.
An elbow is a type of connecting pipe commonly used in installations and is used to connect pipe bends to change the direction of the pipe. Other names: 90° elbow, right angle bend, stamping elbow, pressing elbow, mechanism elbow, welding elbow and so on. Uses: Connect two pipes with the same or different nominal diameter to make the pipes turn at 90°, 45°, 180° and various degrees.
The bend radius is less than or equal to 1.5 times the diameter of the pipe and is greater than 1.5 times the diameter of the pipe.

Technical requirements for producing elbows:
It is required to control the radius of curvature. For example, if the radius is 1.5D, then the radius of curvature must be within the required tolerance. Since most of these fittings are used for welding, in order to improve the welding quality, the ends are car-grooved, leaving a certain angle, with a certain edge, this requirement is also more strict, the edge is thick, the angle is how much and the deviation range There are provisions that have many more geometric dimensions than fittings. The elbow surface quality and mechanical properties are basically the same as the tubes. For welding convenience, the material of the steel of the pipe to be connected is the same. 1.1.5 times the center of the elbow height A = diameter * 1.524, in fact, the path diameter D * multiples, the decimal number of the result will be rounded to the nearest integer number, such as 10 inch 90 degree elbow dimensions, the path D is 250, the center height is 250 * 1.524 = 381,
(Algorithm for radius of curvature of DN100 and above is quick and easy to calculate).

2.Poke height = center height + radius of the elbow, such as 10 inch 90 degree elbow dimensions with a diameter of 273 , = 305+273/2=441.5

3.The outer arc length = (center height + radius) * 3.14 * 2/360 * degrees, that is (poke height) * 3.14 * 2/360 * degrees, which can be calculated from the outer arc length of the 90 degree elbow = stamp High *3.14/2

4.The length of the inner arc = (central height - radius) * 3.14 * 2/360 * degrees

5.The elbow length = elbow center height * 3.14/2 * elbow diameter / pipe diameter + (pipe wall thickness * 3) + Machining allowance, such as the use of 180 * 8 tube cutting, pushing 273 elbow, using the above formula can be calculated, the length of the blank;  = 381 * 1.57 * 273/180 + 24 = 931.22mm + allowance.