Does a steam drum need a safety valve?
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Does this type of steam trap require a safety valve? The inner diameter of the tank is approximately 700, and its height is 1200; it is placed directly in the pipe rack along with the pipes. The design team used to not include a safety valve in such designs, but now, as part of inspections of older installations, it is required to have a safety valve installed. I’m not sure whether one should be added, and I’m also confused about how to determine its discharge capacity and discharge temperature. I plan to use the fire condition with condensed water in the tank to calculate the discharge volume, but at this point the relief valve’s discharge temperature is lower than the steam operating temperature. ? If I calculate the discharge capacity of the tank’s safety valve based on the steam flow rate, it seems that the required safety valve would be quite large. I’m confused; I’m a newbie. Please help me, experts
As a pressurized device, a steam trap may require the installation of a safety valve in accordance with specific operating conditions and safety regulations. It depends on the regulations and standards in your **or region to ensure safe operation. The discharge volume should be determined based on the worst-case scenario of maximum emissions that is most likely to occur; typically, the design pressure of the equipment and relevant safety factors are taken into account. The discharge temperature should be equal to or higher than the steam operating temperature. It is recommended that you consult a professional design firm or safety engineer, and refer to local regulations, in order to conduct a safety assessment of the old equipment. This will help determine whether it is necessary to install safety valves and how to properly select the parameters for those valves. If your safety regulations require the installation of safety valves, then you must comply with those regulations. The selection of safety valves and the calculation of their discharge capacity usually rely on relevant engineering design standards, such as the corresponding domestic regulations. .
It falls under the category of pressure vessels; according to clause 9.1.2 of TSG 21-2016, pressure vessels shall be equipped with overpressure relief devices as required by the design
It needs to be added; have a design institute do the calculations. Initially, it seems that a DN25 size will be sufficient for your container capacity.
It’s definitely necessary, in case the steam at the source experiences overpressure.
There must be a calculation error; the saturation temperature of the separation tank, as well as the pressure of the safety valve, are higher than those under normal operating conditions, which in turn results in a higher corresponding temperature
Don’t talk next time; it’s as if you didn’t say anything
I’ve noticed that lately there are many posts on the forum that are just copies of AI-generated answers; the structure of these responses is almost identical. I wonder what those people who post such things are thinking – is it just to increase the volume of posts?
I think it can be considered in this way: first, there are manual valves on both the upstream and downstream sides of the inlet water separation tank, which separate the water separation tank from the compressor into an independent pressure system. Therefore, it is necessary to consider whether this pressure system might exceed the designed pressure level. Secondly, determine the maximum pressure value of the steam coming from upstream (for example, whether safety valves are already installed there), and check whether the design pressure of the water separation tank is set based on this value with an appropriate margin. Third, as mentioned in the comments above, the pressure relief valve has a corresponding saturation temperature at which it releases pressure.
A safety valve is definitely needed； The discharge volume is primarily determined by the maximum upstream overpressure and fire conditions ； Also, your claim that the condensate level under fire conditions is even lower than it is now is a misunderstanding. In a fire scenario, the tank under consideration is at its current steam pressure, and there is also heating from a hot surface on the outside – how could the pressure be low at this point?