Fire test PIR, PUR and EPS 

House fires typically heat up to c1500 degrees C, I suspect that’s much higher than your torch.

My understanding is even PIR will ignite at 400 degree's Celsius and a typical house fire will be >400.

I've been to numerous flat fires where Polystyrene was used on the exterior face and the damage was minimal, helped in part by the firebreak. Years ago Polystyrene would blaze quite rapidly, a change in its Chemical composition, makes it no longer capable of holding a flame.

The fire spreading depends on O2 intake speed. Even Al alloys can burn.

PIR = polyisocyrunate not polyurethane

This type of test is not relevant. There are many examples (on RU-vid) of blazing buildings that are clad with EPS, XPS, PIR and PUR insulations. The safest non-combustible insulation is still Stone Wool.

Does have procedure to doing fire test for sandwich panel and according to which standard

I guess that smell would have been awesome

Good test. can you help me how to make PES virgin beads?

pir insulation panel

this test proofs nothing