| Type | Category | Code |
| 45 deg elbow | long radius | 45E(L) |
| elbow | long radius | 90E(L) |
| short radius | 90E(S) | |
| long radius Reducing diameter | 90E(L)R | |
| 180 deg elbow | long radius | 180E(L) |
| short radius | 180E(S) | |
| Reducing joint | concentric | R(C) |
| Reducer | eccentric | R(E) |
| Tee | equal | T(S) |
| reducing diameter | T(R) | |
| Crosses | equal | CR(S) |
| reducing diameter | CR(R) | |
| Cap | C |
Elbow classification
1. According to its radius of curvature, it can be divided into long radius elbow and short radius elbow. A long radius elbow means that its radius of curvature is equal to 1.5 times the outer diameter of the pipe, that is, R=1.5D. A short radius elbow means that its radius of curvature is equal to the outer diameter of the pipe, that is, R=D. In the formula, D is the elbow diameter and R is the radius of curvature. The most commonly used elbow is 1.5D. If it is not indicated in the contract as 1D or 1.5D, the most commonly used executive standards in China to optimize the selection of 1.5D are GB/T12459-2005, GB/T13401-2005, and GB/T10752-1995
2. According to the structure shape, it is usually round elbow, square elbow, etc.
Relevant dimensions of elbow
In general, the elbow angle, bending radius, diameter, wall thickness and material can be determined only after knowing the following data.
Calculation of theoretical weight of elbow
1. Round elbow: (outer diameter – wall thickness) * wall thickness * coefficient * 1.57 * nominal diameter * multiple coefficient: carbon steel: 0.02466
Stainless steel: 0.02491 Alloy 0.02483
90 ° elbow (outer diameter – wall thickness) * wall thickness * coefficient (0.02466 for carbon steel) * 1.57 * nominal diameter * multiple/1000=theoretical weight of 90 ° elbow (kg)
2. Square elbow:
1.57 * R * perimeter of square mouth * density * thickness
Calculation of elbow area If the weight is calculated, you can use the weight/density/thickness to calculate the area, but pay attention to the unity of units
1. Round elbow=1.57 * R * caliber * 3.14;
2. Square elbow=1.57 * R * perimeter of square mouth
R stands for bending radius, 90 ° elbow calculation method
Post time: Nov-24-2022
