Palibe maulamuliro pamavotero osaphulika fumbi ndi gasi, monga akulamuliridwa ndi miyezo yosiyanasiyana ya dziko. Chitsimikizo chotsimikizira kuphulika kwa fumbi chimatsatira muyezo wa GB12476, pomwe chiphaso chotsimikizira kuphulika kwa gasi chimatsatira GB3836.
Miyezo yosiyana imatanthawuza kuti mayeso omwe amachitidwa panthawi ya certification amasiyana. Choncho, these two types of explosion-proof equipment are not interchangeable and cannot replace each other.