Vent pipe rupture disc
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Exhaust gas duct, under negative pressure, leading to the exhaust gas treatment unit; it was instructed that a rupture disc must be installed in the main pipe at regular intervals. At first, I didn’t understand—isn’t the pressure in the pipeline negative? How to achieve explosion relief. It was explained that the burst disc serves to prevent excessive pressure in the pipeline caused by the combustion of exhaust gases, thus playing a safety role. I would like to ask, is there any regulatory basis for this? Or is it really meaningful? How did you all design it?
It’s the rupture disc, right? To release pressure in case of an explosion
It seems reasonable, but it’s not clear if there are any regulations regarding this
I’m not sure if there are any regulations regarding this, but in my previous workshop, the exhaust gases from the breather valves of the oil tanks were collected and sent to the negative-pressure pipeline for coking gas, which effectively reduced the emission of unpleasant odors. From the design stage through installation to the current usage phase, environmental and safety checks were carried out on multiple occasions; there was no requirement to install explosion relief devices. However, another pipeline led the gases to a heating furnace for combustion, and safety devices such as explosion-proof water seals and flame arresters were installed there. The current new project also includes a system for directing waste gases into a negative pressure environment, but no explosion relief devices have been installed. However, since the operation takes place under negative pressure, it is possible for air to enter. If it isn’t possible to ensure effective prevention of air from entering, especially in the case of sulfur-containing waste gases, it would be advisable to install safety valves or explosion relief discs. This is just my personal opinion, for reference only!
\"Safety Technical Requirements for Regenerative Thermal Oxidizer (RTO) Systems (Draft for Comment)\” 4.3.5.2 The inlet pipeline of the RTO system shall be equipped with explosion vents, and an explosion relief door shall be installed inside the furnace chamber. The vented gas should be released to a safe location, away from areas where people are present and other process facilities.
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I’ve never heard of any standards requiring this; venting for explosion protection is usually installed on the furnace – how can it be installed on pipes? If it’s a burst disc, it has already exploded; nothing will help no matter what is added
I remember having seen regulations before that require the installation of rupture discs on pipelines. Generally, such discs are also installed on pipelines in projects involving RTOs. I believe this is a sensible measure. When there is a risk of explosion in the oxidizer, regardless of whether the design pressure or normal operating pressure of the oxidizer and its connected pipelines was positive or negative prior to that, their actual pressure will quickly become positive. Therefore, installing rupture discs both on the furnace and on the pipelines can provide a means for the system to vent to the atmosphere, thereby preventing the spread of any potential accidents. However, I really couldn’t find any basis for determining the size of these pipeline rupture discs. I hope someone knowledgeable can shed some light on this matter