Issues with the special fittings connecting the safety valve outlet pipeline
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On the outlet pipe of the safety valve, there is a special component called a steam spray; this component is connected to low-pressure steam. What is the function of this special component? The medium in question is toxic – are there any specific requirements regarding the disposal of such toxic materials?
I’m not sure about the exact layout; this device seems to be used for spraying steam. Is it intended to remove harmful substances or to extinguish fires?
There isn’t enough information. The possible functions of steam here include dilution, absorption, operation, fire extinguishing, etc.; however, since it is unknown what the medium is and what the overall system looks like, it is impossible to guess
Purge steam? On some flare lines, steam purging lines are used to facilitate the handling of these flare lines during shutdowns.
Toxic media must be discharged in a sealed manner. Will steam react with this toxic substance, or will it have a diluting effect?
The medium released by the safety valve is ethylene oxide. I consulted section 5.5.9 of standard 50016, which outlines the requirements regarding ethylene oxide emissions: A burst disc should be installed in front of the safety valve of equipment handling high concentrations of ethylene oxide; the pipeline leading to the burst disc should be sealed with nitrogen, and the outlet pipeline of the safety valve should also be flushed with nitrogen. I’m not quite sure about the specifications for this sentence – is it necessary to add a nitrogen pipeline at the inlet of the safety valve? How should this line be connected to the safety valve inlet? Should it be done using a quick-connect fitting, so that once the safety valve opens, nitrogen can be used immediately to blow away any harmful substances? I’ve thought about it; perhaps the principle involved with low-pressure steam is similar to that of nitrogen. As for the outlet, it’s meant to help disperse the concentration of harmful substances. I’m not sure if anything similar has been done before – could you explain that?