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I completely disagree. With gas you don't want to rely on common sense or interpretation. You want clearly written rules.
You first answer was wrong as you advised a DIYer to seal the pipe with silicone, ommiting to mention the important part about venting to outside. This is particularly relevant in the above photo as the sleeve does not extend beyond the face of the wall so a DIY attempt to seal based on your initial advice would certainly seal the sleeve.
You are also wrong the sleeve is just there to prevent gas escape into a void. If you were familiar with / had read the regs you posted above you will note the sleeve is also there to protect the pipework from movement in the wall.
sacredhart-
But it doesn’t prevent pipe work from moving in the wall no matter what the regs say, let’s talk real life her instead of theoreticals. You can disagree all you want but even if he sealed it what’s it gonna do? You seem like the expert. I see far worse on the job regularly from “qualified engineers” and wouldn’t be worrying about triviality like this.
I’d say if the person was breaking into a gas line it would be completely different but your making a mountain out of a mole hill here in terms of real life Over something that might or might not be sealed inside
konastab01
I mean your reply is very different too, theres some common sense here and from the picture there hole surround the sleeve is gaping. Yet you said the information is incorrect, it seems common sense might be not that common.