Dear K.Stephen,
May I clarify the requirement as below :
1. Gas detector is required for each station or storage containing LPG more than 500 kg. So the cluster 4 tanks (48 kg. x 4 = 192 kg.) as design would be not required.
2. The LPG cylinder shall not be placed in the dining area
3. The location or storage of LPG cylinders shall be away from sources of heat, flame or materials that cause sparks or fires or burns easily at least 3.00 meters.
4. The permit of canteen LPG station is covered by permit of PB LPG station due to they located in the same Registered No. So, there will be only one permit of LPG station.
5. Due to LPG station is required for PM and yearly inspection, so canteen LPG station shall be applicable as well.
Whereby SHE recommended to be LPG station due to the stand alone tank cannot ensure for the PM and inspection conducting by vender. Please consider accordingly krub.