A DBSS ceiling (video) which Khaw Boon Wan might want to explain

[Papsmearer]

You are correct that the fire will burn like a jet from a leaking pipe.

In the old designs, gas pipes are exposed and like you have mentioned can be easily vandallised. In the new requirements, all gas pipes in common area must be concealed in a ventilated duct, specially designed for that purpose, with locked access doors. The gas pipe must enter each unit from inside the duct so as to prevent anyone from tampering it. So those pipes in the video are not gas pipes but water supply pipes. There is also no gas pipe in those vent duct. Just an empty channel to ventilate the room where there are gas pipes, which is really quite silly.

Ps, All material has a fire rating. For example, the fire rating of a lift comes from the steel cage itself. Therefore, if a glass panel is added to the door, it must have the same fire rating as the steel and is very very expensive.

Thanks for your explanation. I thought the video mentioned these were gas pipes.