Can holes be made in the flange stub of a Type B container to attach pipes?
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It has a diameter of 1000, with a volume of around 1 cubic meter; the medium used is brine. Since lining is required, flanges are used to separate the elliptical head from the cylinder. 1. The operating pressure is 0.6 MPa; should the design pressure be higher than the operating pressure? Should I choose type A or type B flanges? 2. Use a type B flat welding flange with a stub; can holes be made in the stub to insert pipes? DN80 and DN25.
The short section should belong to the flange body; let’s calculate it as a custom flange to see if that works
Thank you. Is there a simpler calculation formula? The formula in GB150 seems complicated, with many pieces of data that need to be looked up. The parameters of my container are a diameter of 1000, an operating pressure of 0.6 MPA, it uses a liquid medium, and the liquid level is below the flange surface. The working principle is to use compressed air to compress a liquid in order to provide pressure for external devices.
In your case, you can definitely choose type A flanges, and there will be no issues with the openings.
For Type A flanges, the minimum pressure for the DN1000 size is PN1.6; at PN1.0, the maximum size is DN900. It can be changed to a DN900 container; increasing the height is no problem. The problem is that the operating pressure is 0.6 MPa, the temperature of the saline medium is 50°C, and the maximum compressive pressure in the pipes is 0.8 MPa. So I want to know the relative magnitude of work pressure, design pressure, and inspection pressure. Is a working pressure of 0.6, a design pressure of 0.8, and a test pressure of 1.0 acceptable?
With 80% being a liquid medium, do containers with flange connections still need manholes? Can it only be installed on top?
The values of the operating pressure, design pressure, and pressure test pressure need only meet the requirements specified in GB150
Holes cannot be made in short sections. Because the short section is subject not only to circumferential stress, but also to complex stress conditions.