What determines the blast strength of a boiler explosion? Are any boilers strong enough to destroy reinforced concrete?

Also, do covers of blast resistant type add blast resistance, or do I need a whole block? For example, for piping into/out of a boiler room, will reinforced concrete covers at the interface block the blast or do I need to add a covered bend?

Thanks. Can you confirm if the following is correct?

Going by vanilla mechanics, an explosion ray can have max strength intensity x 1.7, and a block reduces this by (resistance+.3) x .3, so to have a chance to break reinforced concrete (res. 48), an explosion needs intensity a little more than 8.5.

The formula for single block boilers is sqrt(steam)/100. Setting it equal to 8.5 gets a required steam amount of more than 720k, so a strong tungsten boiler at 512k would not destroy it. I don’t remember if there was a 1024HU/t boiler, but if it exists, ot would hold 1024k steam and could destroy reinforced concrete.

Multiblocks have power 2 + sqrt(steam)/1000, so they would need more than 42m steam. I don’t remember the multiblock boiler stats but I guess this would correspond with the third tier of multiblock boiler, since the stainless boiler is 4096HU/t and 4096 x 4 x 4 = 65k > 42k.

So it seems like a layer of reinforced concrete should be enough for 512HU/t single boilers or 16k HU/t multiboilers.

According to this, normal concrete (res. 24 iirc) can block < 184HU/t boilers or < 5236 HU/t multiboiler (so stainless/invar).

I was wrong about the tank sizes, the tungsten(steel) boiler holds 5120000 steam, and has an explosion intensity of 22. If the multiblock boiler steam capacities are also heat rate*10000, then only the stainless/invar large boiler could be contained by one layer of reinforced concrete, with an explosion intensity of 8.4