How to calculate the bending radius of 90 degree elbow?

　　1. 1.5 times of elbow center height = drift diameter * 1.524, which is actually drift diameter * multiple. Round the number after the decimal point of the result to the whole number. For example, if the drift diameter of 219 is 200, the center height is 200 * 1.524 = 304.8, take 305; if the drift diameter of 114 is 100, the center height is 100 * 1.524 = 152.4, take 152.

　　(it is convenient and fast to calculate the radius of curvature of DN100 and above elbows).

　　2. Stamp height = center height + radius of elbow, for example, stamp height of elbow with 1.5 times of diameter 219 = 305 + 219 / 2 = 305 + 109.5 = 414.5

　　3. Outer arc length = (center height + radius) * 3.14 * 2 / 360 * degrees, i.e. (stamp height) * 3.14 * 2 / 360 * degrees, from which it can be calculated Stainless Steel Elbow for Railing that the outer arc length of 90 degree elbow = stamp height * 3.14/2

　　4. Length of inner arc = (center height radius) * 3.14 * 2 / 360 * degrees

　　5. Blanking length of elbow = height of elbow center * 3.14/2 * outer diameter of elbow / diameter of pipe + (wall thickness of pipe * 3) + machining allowance. If 180 * 8 pipe is used for blanking, 273 elbow can be produced, which can be calculated by the above formula. Blanking length = 381 * 1.57 * 273 / 180 + 24 = 931.22mm + machining allowance.