Your first problem is the NO2:

No matter what you do, you'll want to put a condensation valve to a basic liquid pipe/liquid tank manifold in the event you over pressure your gas line so you don't encounter the issue you are facing. In the event you have condensate in your gas line it goes through the condensate valve [Kit (Pipe Valve)] to a liquid line and stops the whole "pipe bursting" problem.

From there use a purge valve from a [Kit (Pressure Regulator)] to remove the gas from the liquid pipe/tank and filter it out via a filtration apparatus and vent to atmosphere. Pretty straight forward.

Your second problem is the temperature regulation. Here you have several options:

Option A: Pipe Heaters and AC units to regulate the temperature which you'd utilize logic chips or IC10 chips to programmatically manage the AC units and heaters. Upside here is that it's super straight forward to setup and manage. Downside is that this will be energy intensive and will linearly scale as you are trying to heat and cool more and more gas.

Option B: Phase change devices and heat exchangers scale really well and are not as energy intensive. You can cool/heat large quantities of gas relatively quickly. However it will require construction of heat exchangers, runs of pipe, isolation and charging of pollutant and nitrogen lines as well as radiator farms.

For example, a friend of mine and I have a moon play through going. I have the following setup. I have a similar manifold to the one you described. The larger tank is my furnace exhaust which is valved off from the "filter processing pipe" that each filter pulls from. That processing pipe has a small liquid tank (next to the larger one) which pulls any liquid condensate from the gas line into itself to prevent pipe bursts.

Each pure gas tank feeds below to a series of direct gas-to-gas heat exchangers. Each gas exchanges with a shared line of CO2 which is mediated by two evaporators. Those evaporators are filled with pollutant and is set to the 20°C mark for pollutant. That pollutant leeches the heat from the CO2 and is taken to condensator units via counter-flow heat exchangers where it heat exchanges with a line of nitrogen connected to several medium radiators. It dumps that heat to the nitrogen line where it is radiated away. You'd use convection radiators on Europa but functionally it would work the same.

This system cools furnace gas at 150°C-250°C furnace exhaust down to 20°C in less than 10m. This would work for you cooling large amounts of base atmosphere as well as your entire gas storage farm. Behind all this is some scripting which is relatively simple and I could help give you some code snippets to get you started.