Horizontal container saddle reinforcement ring
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This post was last edited by kareale88 on 2019-1-21 12:02 NB/T47042 calculation horizontal vessel, diameter 3600mm, design pressure 0.5MPa (calculated pressure 0.54MPa), elliptical heads at both ends, cylinder length about 18 meters, material S30408. When a reinforcing ring is considered to be located on the saddle plane, the stress calculation cannot be passed (cylinder circumferential stresses 7 and 8). When a reinforcing ring of the same specification is used and is moved closer to the saddle plane (also a reinforcing ring), the SW6 calculation can be passed. Could this practical arrangement use a reinforcing ring? I see that in 47042, for the reinforcing rings close to the saddle plane, the picture shows two reinforcing rings, but SW6 can choose one. Note: I don’t want to consider increasing the reinforcement ring.
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A reinforcing ring is placed in the saddle plane. If it does not pass, the cross-sectional area of the reinforcing ring can be increased until it passes. If you use reinforcing rings close to the saddle plane, it is best to use two according to the standard, so that the force is more balanced.
Thank you, I'll try my best to follow the standards. In addition, the thickness of the saddle pad (welded to the cylinder) is relatively thick as specified in the standard. For example, if the diameter is 3600mm, the thickness of the padding plate of a 150-degree heavy-duty saddle is 24mm. Can the thickness of the saddle padding be reduced based on the SW6 calculation results? For example, the cylinder plate is 8mm and the saddle pad is 14mm.
Can. But it must be calculated and passed. In addition, you cannot write the saddle standard number. Write the saddle as the drawing number, design it yourself, and indicate in the remarks that it refers to the saddle standard.
Should a backing plate be added? Does the backing plate have a reinforcing effect? When approaching the saddle, reinforcing rings should be added on both sides.
Non-standard saddles are calculated according to the horizontal container specifications.
I would like to ask what is the difference in the force and amount of material between adding two reinforcing rings near the saddle plane and adding one reinforcing ring on the saddle plane?
When SW6 calculates close to the saddle plane, it defaults to pressing two. How come someone asks you to enter one data and requires the two to be exactly the same?